Give the seat holding the button its own middle back

On a fresh table the button is on seat 1, and seat 1 is where the first player
goes. Tapping it did nothing.

The dealer chip is a 22px disc, and a 22px disc is half the 44px a fingertip
needs, so it carried an invisible pad to catch the tap. The pad was moved twice
looking for somewhere to grow that wasn't already spoken for: outward first,
where it hung over the seat next door and gave that seat the button; then
inward, over "its own seat, which is a large target that can spare the corner".

The seat could not spare it. Measured on a 390px phone, a 72x46 puck: the pad
ran from the puck's own centre to its right edge and from its top to 3px off its
bottom, and the chip's handler calls stopPropagation. The seat holding the
button kept 52% of its face — 130 of 276 sampled points went to the chip, its
exact middle among them. Every other seat kept 97%. The button moves every hand,
so the dead puck went round the table with it.

And the chip it went to had nothing to say. Its only answer is "give the button
to this seat", and this is the seat that has it. The seat menu already knew that
and hides "Give the button" there; mid-hand the same no-op would have taken the
blinds off the felt and re-posted the same chips to announce that nothing
happened.

So the pad is gone rather than moved again — a fixed pad cannot be safe at every
puck size, and no finger reaches any chip now: the ghosts are pointer-events:
none without hover, and the one live chip is this one, which is now inert to the
pointer and still there to read. Giving the button is the long-press menu on
touch and the revealed ghost on a mouse, both unchanged. makeDealer returns
early on the seat that already has it, so the keyboard can't re-post blinds to
move the button nowhere either.

The sweep had a check for exactly this — "a seat's centre belongs to that seat",
written when the pad was reaching outward — and it ran clean through all of it,
because `seat.contains(hit)` waves through anything inside the seat and the chip
is inside the seat. The check written for this bug could not see the second half
of it. A control inside a seat is a rival for the tap now, and against the old
stylesheet it fails seven scenarios.

982 unit tests, 6 of them new; the layout sweep is 320 audits with the one
pre-existing failure (a $1,300 chip behind seat 11 on a twelve-handed 360x640
all-in).

Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_015bnp7xKUPFFSpwkYNFaPgb

.gitignore

@@ -366,4 +366,6 @@ MigrationBackup/
 FodyWeavers.xsd
 
 # Native chess engine CMake build output (the compiled .dll/.so are committed under Resources/)
-native/**/build/
+native/**/build/
+# Playwright MCP scratch output
+.playwright-mcp/

JoshHeaps.Net/Pages/Casino/TexasHoldem.cshtml

@@ -7,27 +7,58 @@
 
 <div id="holdemApp">
     <header id="holdemHeader">
+        @* Six equally-weighted buttons used to sit here in two rows, and on a 390px
+           phone the felt did not start until 225px down — a quarter of the screen spent
+           before the dealer saw the table. Only two of the six are per-hand controls.
+           The rest have gone where they belong rather than into a "more" menu, which
+           would have relocated the crowding rather than removed it: Reset Table down to
+           the sidebar with the save/load pair — in a panel called Save & reset, so the
+           danger is on the label rather than at the end of a scroll — Quick Split down
+           with Common rulings where the other "open something else" link already lives,
+           and the way back to the site up top where a back link goes. *@
+        @* The word is its own element so a phone can drop it and keep the arrow, and the
+           aria-label is what a screen reader gets either way. It contains the visible
+           text on the sizes that still show it, which is what WCAG 2.5.3 asks of a name
+           that says more than the label does. *@
         <div id="holdemHeaderLeft">
+            <a href="/casino" class="holdemBackLink" aria-label="Back to Casino">←<span class="backLinkWord"> Casino</span></a>
             <h1>Texas Hold'em Dealer</h1>
-            <p class="holdemSubtitle">Seat your players, track the action, split the pot.</p>
-            <span id="handCounterBadge" class="handCounterBadge">Hand #1</span>
         </div>
         <div id="holdemHeaderActions">
-            <a href="/casino/texasholdem/quicksplit" class="holdemBtn" title="Chop a pot without setting up a table">Quick Split</a>
+            <button id="misdealBtn" class="holdemBtn" title="Take this hand back — every chip returns to the player who put it in, and the same button deals again" hidden>Misdeal</button>
             <button id="nextHandBtn" class="holdemBtn" title="Move the button, small blind and big blind to the next occupied seat">Next Hand ⟳</button>
-            <button id="resolvePotBtn" class="holdemBtn holdemBtnAccent">Resolve Pot</button>
-            <button id="resetTableBtn" class="holdemBtn holdemBtnDanger">Reset Table</button>
-            <a href="/casino" class="holdemBtn holdemBtnGhost">← Casino</a>
+            @* Not the accent any more. It is a shortcut to a sheet, available all night,
+               and it is never the next step — the bar always has that, and at showdown
+               the bar says so in as many words. See .actionAdvance in holdem.css. *@
+            <button id="resolvePotBtn" class="holdemBtn">Resolve Pot</button>
         </div>
     </header>
 
+    @* The seat sheet was the only one of the tool's seven overlays with nothing behind
+       it. On a phone it covers the felt from 250px down and the action bar with it, so
+       it is modal in everything but appearance — and what stayed lit above it was the
+       header, with Misdeal, Next Hand and Resolve Pot live under a thumb that was
+       reaching for a name field. NN/g and Material both say the same thing about this:
+       a modal sheet with an invisible scrim tells the user they can still touch what
+       they can still see, and they can't.
+
+       Not an `*Overlay` id, deliberately — Modal watches those and would take the
+       sidebar panel this becomes on a desktop for a dialog. It is driven entirely by
+       body.seatSheetOpen, and it is `display: none` above 700px where the panel is
+       just a panel. *@
+    <div id="seatSheetScrim"></div>
+
     <div id="holdemLayout">
         <section id="tableSection">
+            <div id="boardStrip" hidden></div>
             <div id="pokerTableWrap">
                 <div id="pokerTable">
-                    <div id="potBadge">
-                        <span id="potBadgeLabel">Pot</span>
-                        <span id="potBadgeAmount">$0</span>
+                    <div id="tableCentre">
+                        <div id="boardRow" hidden aria-label="Community cards"></div>
+                        <div id="potBadge">
+                            <span id="potBadgeLabel">Pot</span>
+                            <span id="potBadgeAmount">$0</span>
+                        </div>
                     </div>
                 </div>
                 <div id="betsLayer" aria-hidden="true"></div>
@@ -36,6 +67,7 @@
             <p id="tableHint" class="tableHint"></p>
             <p class="tableHintActions">
                 <button type="button" id="openRulingsBtn" class="linkBtn">Common rulings</button>
+                <a href="/casino/texasholdem/quicksplit" class="linkBtn" title="Chop a pot without setting up a table">Quick Split</a>
             </p>
         </section>
 
@@ -51,8 +83,12 @@
                 </div>
             </section>
 
-            <details class="sidebarPanel" open>
-                <summary>Table Setup</summary>
+            @* Not `open` in the markup any more. Whether this panel starts open is a
+               question about the table, so main.js answers it after the state has
+               loaded: open on a table nobody has set up yet, shut on one already
+               half-way through a night. *@
+            <details class="sidebarPanel" id="tableSetupPanel">
+                <summary><h2>Table Setup</h2> <span class="panelGlance" id="glanceTableSetup" hidden></span></summary>
                 <div class="panelBody">
                     <label class="fieldRow">
                         <span>Seats at table</span>
@@ -70,6 +106,22 @@
                         <input type="checkbox" id="dedicatedDealerToggle" />
                     </label>
                     <p class="fieldHint">Turn this on if a person outside the game deals — no seat shows the dealer button, but blinds still rotate automatically each hand.</p>
+                    <label class="fieldRow">
+                        <span>Ask me for the cards as they come out</span>
+                        <input type="checkbox" id="trackBoardToggle" />
+                    </label>
+                    @* The label used to lead with "Track the board", which is the feature's name
+                       rather than what pressing it does to your evening. What it does is put a
+                       card sheet in front of you at four moments: each street, and the showdown. *@
+                    <p class="fieldHint">Every time you deal a street, a sheet asks which cards came off the deck, and puts them on the felt. At the showdown it asks for each hand that turns over &mdash; then Resolve Pot reads the winner and the amount instead of asking you. Close the sheet at any point to go back to picking the winner yourself.</p>
+                    <label class="fieldRow">
+                        <span>Keep the screen on during a hand</span>
+                        <input type="checkbox" id="keepScreenAwakeToggle" />
+                    </label>
+                    @* On by default, and the only setting here that is. A dealer has to
+                       opt in to the tool doing more than they asked; they should not have
+                       to opt in to it staying readable. *@
+                    <p class="fieldHint">Stops the phone dimming and locking between the flop and the turn. It only holds while betting is open, so the screen sleeps as usual during breaks &mdash; and the tool says so the first time it takes hold.</p>
                     <div class="blindsRow">
                         <label class="fieldRow">
                             <span>Small blind</span>
@@ -86,6 +138,32 @@
                     </label>
                     <p class="fieldHint">Blinds post themselves each hand. Seats without their own stack start here.</p>
 
+                    <details class="subPanel">
+                        <summary>House take</summary>
+                        <div class="subPanelBody">
+                            <div class="blindsRow">
+                                <label class="fieldRow">
+                                    <span>Rake (%)</span>
+                                    <input type="number" id="rakePercentInput" min="0" max="100" step="0.5" placeholder="0" />
+                                </label>
+                                <label class="fieldRow">
+                                    <span>Cap ($)</span>
+                                    <input type="number" id="rakeCapInput" min="0" step="1" placeholder="none" />
+                                </label>
+                            </div>
+                            <label class="fieldRow">
+                                <span>No flop, no drop</span>
+                                <input type="checkbox" id="rakeNoFlopInput" />
+                            </label>
+                            <p class="fieldHint">
+                                Taken from the pot when it's awarded, and shown before anything is pushed.
+                                Rounded down to a chip the table has, so the players keep what the house
+                                can't make. Leave the percentage at zero for a game that doesn't rake.
+                            </p>
+                            <p class="fieldHint" id="rakeTakenHint" hidden></p>
+                        </div>
+                    </details>
+
                     <details class="subPanel">
                         <summary>Without live betting</summary>
                         <div class="subPanelBody">
@@ -99,11 +177,23 @@
                 </div>
             </details>
 
+            @* These four were one panel called "Session", which is a container word rather
+               than a name: it held the standings, a waiting list, the hand log and the
+               save/load/reset buttons — a topic, a task, a log and three utilities, which
+               is four kinds of thing under one label. It measured at 1206px and 103
+               elements, and "The table itself" was 1052px down inside it, so reaching
+               Reset table meant opening a panel called Session and scrolling past the
+               money and the log to get there.
+
+               Each panel is named for the thing a dealer came looking for, and the
+               subheads that used to do that job are gone, because the summary says it
+               now. They are in the order of a night: set the table up, watch the money,
+               fill the seats, look back at a hand — and, last and apart from the rest,
+               the two buttons that end it. *@
             <details class="sidebarPanel">
-                <summary>Session</summary>
+                <summary><h2>Standings</h2> <span class="panelGlance" id="glanceStandings" hidden></span></summary>
                 <div class="panelBody">
                     <p id="storageWarning" class="storageWarning" hidden></p>
-                    <h3 class="panelSubhead">Standings</h3>
                     <div class="standingsTableWrap">
                         <div id="standingsTable">
                             <div class="standingsRow standingsHeader">
@@ -132,7 +222,16 @@
                             <span>Taken off the table</span>
                             <span id="bankDiscarded"></span>
                         </div>
+                        <div class="bankReconcileRow" id="bankRakedRow" hidden>
+                            <span>House take</span>
+                            <span id="bankRaked"></span>
+                        </div>
+                        <div class="bankReconcileRow" id="bankPaidOutRow" hidden>
+                            <span>Paid out</span>
+                            <span id="bankPaidOut"></span>
+                        </div>
                         <p id="bankReconcileVerdict" class="bankReconcileVerdict"></p>
+                        <button type="button" id="bankRecordBuyInsBtn" class="holdemBtn holdemBtnSmall" hidden></button>
                     </div>
 
                     <div id="settleUp" hidden>
@@ -140,8 +239,24 @@
                         <ul id="settleUpList" class="settleUpList"></ul>
                         <p id="settleUpNote" class="fieldHint"></p>
                     </div>
+                </div>
+            </details>
 
-                    <h3 class="panelSubhead">Hands</h3>
+            <details class="sidebarPanel">
+                <summary><h2>Waiting list</h2> <span class="panelGlance" id="glanceWaiting" hidden></span></summary>
+                <div class="panelBody">
+                    <form id="waitingListForm" class="waitingAdd">
+                        <input type="text" id="waitingNameInput" maxlength="24" placeholder="Who's waiting?" autocomplete="off" />
+                        <button type="submit" id="waitingAddBtn" class="holdemBtn holdemBtnSmall">Add</button>
+                    </form>
+                    <ol id="waitingList" class="waitingList"></ol>
+                    <p id="waitingEmptyHint" class="fieldHint">Nobody waiting. Add the people standing behind the chairs, and the tool will offer them the next seat that opens.</p>
+                </div>
+            </details>
+
+            <details class="sidebarPanel">
+                <summary><h2>Hands</h2> <span class="panelGlance" id="glanceHands" hidden></span></summary>
+                <div class="panelBody">
                     <div class="handHistoryFilterRow">
                         <input id="handHistoryFilter" type="search" class="handHistoryFilter"
                                placeholder="Find a hand — name, amount or #" aria-label="Filter the hand log by player, amount or hand number" />
@@ -155,22 +270,11 @@
                         <button id="exportHistoryBtn" class="holdemBtn holdemBtnSmall">Export CSV</button>
                         <button id="clearHistoryBtn" class="holdemBtn holdemBtnSmall holdemBtnDanger">Clear history</button>
                     </div>
-
-                    <h3 class="panelSubhead">The table itself</h3>
-                    <p class="fieldHint">
-                        The night lives in this browser and nowhere else. Save it to a file to carry it
-                        to another device, or to have something to come back to if this one dies.
-                    </p>
-                    <div class="handHistoryActions">
-                        <button id="saveTableBtn" class="holdemBtn holdemBtnSmall">Save table file</button>
-                        <button id="loadTableBtn" class="holdemBtn holdemBtnSmall">Load table file</button>
-                        <input id="loadTableInput" type="file" accept="application/json,.json" hidden />
-                    </div>
                 </div>
             </details>
 
             <details class="sidebarPanel">
-                <summary>Chip Legend</summary>
+                <summary><h2>Chip Legend</h2> <span class="panelGlance" id="glanceChips" hidden></span></summary>
                 <div class="panelBody">
                     <div id="chipLegendList"></div>
                     <button id="addChipColorBtn" class="holdemBtn holdemBtnSmall">+ Add chip color</button>
@@ -185,7 +289,7 @@
             </details>
 
             <details class="sidebarPanel" id="keyboardPanel">
-                <summary>Keyboard</summary>
+                <summary><h2>Keyboard</h2></summary>
                 <div class="panelBody">
                     <dl id="shortcutLegend" class="shortcutLegend"></dl>
                     <p class="fieldHint">Nothing fires while you're typing in a field, or while a sheet is open over the table.</p>
@@ -193,11 +297,45 @@
             </details>
 
             <details class="sidebarPanel">
-                <summary>Table Notes</summary>
+                <summary><h2>Table Notes</h2> <span class="panelGlance" id="glanceNotes" hidden></span></summary>
                 <div class="panelBody">
                     <textarea id="tableNotes" rows="4" aria-label="Table notes" placeholder="Anything else worth tracking — side bets, IOUs, running totals..."></textarea>
                 </div>
             </details>
+
+            @* Last, and on its own, because everything in it is about the night as a whole
+               rather than the hand in front of you — and because two of the three buttons
+               are the ones you cannot take back.
+
+               Reset table came down from the header a while ago, where it sat in the same
+               weight as Resolve Pot: the most-pressed control in a session beside the one
+               that throws the night away. It used to be buried at the bottom of Session,
+               1052px down, which hid it but also meant nobody could find it on purpose.
+               Naming the panel for both jobs puts the danger on the label, where it is
+               read before the panel is opened rather than met at the end of a scroll. *@
+            <details class="sidebarPanel">
+                <summary><h2>Save &amp; reset</h2></summary>
+                <div class="panelBody">
+                    <p class="fieldHint">
+                        The night lives in this browser and nowhere else. Save it to a file to carry it
+                        to another device, or to have something to come back to if this one dies.
+                    </p>
+                    @* That sentence has always been true, and always been missing its
+                       second half: a browser is allowed to throw site data away when the
+                       device runs short, and Safari does it on a timer. So the panel now
+                       says which of the two situations this device is actually in, and
+                       offers the one thing that changes it. See requestDurable() in
+                       state.js for why the ask is a button rather than a page-load call. *@
+                    <p class="fieldHint" id="storageDurabilityHint" hidden></p>
+                    <button id="keepStorageBtn" class="holdemBtn holdemBtnSmall" hidden>Ask this browser to keep it</button>
+                    <div class="handHistoryActions">
+                        <button id="saveTableBtn" class="holdemBtn holdemBtnSmall">Save table file</button>
+                        <button id="loadTableBtn" class="holdemBtn holdemBtnSmall">Load table file</button>
+                        <input id="loadTableInput" type="file" accept="application/json,.json" hidden />
+                        <button id="resetTableBtn" class="holdemBtn holdemBtnSmall holdemBtnDanger">Reset table</button>
+                    </div>
+                </div>
+            </details>
         </aside>
     </div>
 </div>
@@ -216,6 +354,20 @@
     </div>
 </template>
 
+@* Four things stacked flat used to be five: name, in/out, two hole-card slots, stack,
+   a five-box chip counter and a list of custom fields, every one of them at the same
+   weight, all of it open at once. Measured on a 390px phone the sheet came to 594px,
+   and the three controls a dealer touches on nearly every visit — the name, the two
+   status boxes, the stack — were 132px of it. The chip counter alone was 174px, the
+   tallest thing in the sheet, for a job most tables do once a night if at all; the two
+   card slots were 62px of dashed grey on every table that never asked to be shown a
+   card.
+
+   So the flat list is now three rows and three disclosures, and which of the three
+   stand open is a question about *this seat*, answered in renderSeatDisclosures: a
+   seat holding cards opens its cards, a seat with chips counted opens its count, a
+   seat with notes on it opens its notes. Anything with nothing in it stays a one-line
+   summary that says so. Nothing was removed and nothing moved to another screen. *@
 <template id="seatEditorTemplate">
     <div class="seatEditorForm">
         <label class="fieldRow">
@@ -232,25 +384,45 @@
                 <span>Fold</span>
             </label>
         </div>
-        <div class="seatCards">
-            <button type="button" class="cardSlot card1Slot" aria-label="Choose first card"></button>
-            <button type="button" class="cardSlot card2Slot" aria-label="Choose second card"></button>
-        </div>
         <label class="fieldRow stackRow">
             <span>Stack</span>
             <input type="number" class="stackInput" min="0" step="1" placeholder="table default" />
         </label>
         <div class="seatBuyIns" hidden></div>
-        <div class="seatContribution">
-            <div class="chipCounts"></div>
-            <label class="fieldRow amountOverrideRow">
-                <span>$ amount</span>
-                <input type="number" class="amountOverrideInput" min="0" step="1" placeholder="auto" />
-            </label>
-            <div class="seatTotal">Total: <span class="seatTotalAmount">$0</span></div>
-        </div>
-        <div class="customFields"></div>
-        <button class="holdemBtn holdemBtnSmall addFieldBtn">+ field</button>
+
+        <details class="subPanel seatSubPanel cardsPanel">
+            <summary><span class="seatSubPanelName">Hole cards</span> <span class="seatGlance cardsGlance"></span></summary>
+            <div class="subPanelBody">
+                <div class="seatCards">
+                    <button type="button" class="cardSlot card1Slot" aria-label="Choose first card"></button>
+                    <button type="button" class="cardSlot card2Slot" aria-label="Choose second card"></button>
+                </div>
+            </div>
+        </details>
+
+        @* Named for the question it answers rather than for the boxes it contains. The
+           counter, the typed override and the total are one calculation — what this
+           seat has put in the pot — and the answer now sits on the summary, so a shut
+           panel still says it. *@
+        <details class="subPanel seatSubPanel contributionPanel">
+            <summary><span class="seatSubPanelName">What they've put in</span> <span class="seatGlance contributionGlance"></span></summary>
+            <div class="subPanelBody seatContribution">
+                <div class="chipCounts"></div>
+                <label class="fieldRow amountOverrideRow">
+                    <span>$ amount</span>
+                    <input type="number" class="amountOverrideInput" min="0" step="1" placeholder="auto" />
+                </label>
+                <div class="seatTotal">Total: <span class="seatTotalAmount">$0</span></div>
+            </div>
+        </details>
+
+        <details class="subPanel seatSubPanel notesPanel">
+            <summary><span class="seatSubPanelName">Notes on this seat</span> <span class="seatGlance notesGlance"></span></summary>
+            <div class="subPanelBody">
+                <div class="customFields"></div>
+                <button class="holdemBtn holdemBtnSmall addFieldBtn">+ field</button>
+            </div>
+        </details>
     </div>
 </template>
 
@@ -262,9 +434,14 @@
     </div>
 </template>
 
+@* The value used to be a `title` attribute, which is a tooltip — and a tooltip is
+   nothing at all on the device this is used on. Five coloured dots with five number
+   boxes and no way to tell which one was the $25 without opening the Chip Legend and
+   matching colours by eye. It is text now. *@
 <template id="chipCountTemplate">
     <label class="chipCountRow">
         <span class="chipSwatch"></span>
+        <span class="chipCountValue"></span>
         <input type="number" class="chipCountInput" min="0" step="1" value="0" />
     </label>
 </template>
@@ -361,6 +538,23 @@
             </p>
         </section>
 
+        <section class="ruling" data-short="Clock">
+            <h3>Calling the clock on a player</h3>
+            <p>
+                Any player may ask for a clock once a decision is taking unreasonably
+                long; it is the dealer, not the table, who grants it. The player then
+                gets a set time and a countdown out loud — thirty seconds and ten is the
+                usual form.
+            </p>
+            <p>
+                If the count reaches zero with no action, the hand is <em>dead</em> if
+                they were facing a bet, and <em>checked</em> if they were not: nobody is
+                folded for slowness when checking was free. The action bar runs the
+                count once you tap <em>Call the clock</em>, and offers the ruling as one
+                button when it ends.
+            </p>
+        </section>
+
         <section class="ruling" data-short="Straddle">
             <h3>A straddle is a blind raise</h3>
             <p>
@@ -504,7 +698,17 @@
     </div>
 </div>
 
-<div id="actionBar" aria-live="polite" hidden></div>
+@* No aria-live here any more. This element's entire contents are rebuilt on every
+   action, so a live region on it announced the whole bar every time — measured, after
+   one tap: "PRE-FLOP Pot $15 9 players Bob · $250 behind 0:00 ↶ dealing the hand U
+   Fold Call $10 Raise". That is what a screen reader read out after every single fold.
+   A live region has to be a stable element whose *text* changes; the one below is. *@
+<div id="actionBar" hidden></div>
+
+@* Whose turn it is, in a sentence. Empty in the markup and only ever written to, so
+   assistive tech is already watching it when the first update lands — a live region
+   created at the moment it has something to say is one the screen reader misses. *@
+<div id="actionAnnouncer" role="status" aria-live="polite" class="visuallyHidden"></div>
 
 <div id="toastHost" aria-live="polite"></div>
 
@@ -526,20 +730,58 @@
             <button id="closePotWizardBtn" data-modal-close class="holdemBtn holdemBtnGhost">✕</button>
         </div>
         <div id="potWizardBody"></div>
+        @* The buttons live outside the scrolling body on purpose. This is the one
+           dialog that divides money, and its Confirm sat below a scroll at every screen
+           size — 244px off the bottom on an iPhone, 583 on a phone held sideways. A
+           sticky footer cannot fix that from inside: the actions were the last child of
+           the scrolling content, so their containing block ended exactly where they did
+           and `bottom` had no room to lift them. Out here they simply don't scroll. *@
+        <div id="potWizardFooter"></div>
     </div>
 </div>
 
 @section Styles {
     <link href="/css/casino/holdem.css?v=@ViewData["cssVersion"]" rel="stylesheet" type="text/css" />
+
+    @* Installable, and works with no signal — see the service worker registration at the
+       foot of main.js. A dealer running a night in somebody's back room is on the worst
+       network there is, and the tool being a *website* was the last thing that could
+       take it away from them mid-game. *@
+    <link rel="manifest" href="/casino/holdem.webmanifest" />
+    @* iOS reads none of the manifest's icons and only this. *@
+    <link rel="apple-touch-icon" href="/images/casino/holdem-apple-touch.png" />
+    @* The standard name first, then Apple's older one. Chrome has been printing
+       "<meta name="apple-mobile-web-app-capable"> is deprecated" into this page's
+       console on every load; the replacement is the unprefixed name, and Safari still
+       wants the prefixed one, so both are here. *@
+    <meta name="mobile-web-app-capable" content="yes" />
+    <meta name="apple-mobile-web-app-capable" content="yes" />
+    <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
+    <meta name="apple-mobile-web-app-title" content="Hold'em" />
+    @* Paints the phone's chrome the same near-black as the felt's ground, so an
+       installed copy doesn't sit under a white status bar. *@
+    <meta name="theme-color" content="#141414" />
 }
 
+@* A note for whoever reads the ?v= below and assumes it works: it doesn't. ViewData
+   ["cssVersion"] is assigned in _Layout's own code block, which runs after these
+   sections are handed their values, so every one of these renders as a bare "?v=" —
+   on this page and on Chess, Particles and Memory Lane too. It is inert rather than
+   broken: Program.cs sends `Cache-Control: no-store` on every static file, so nothing
+   is being browser-cached for a version string to bust in the first place.
+   Left alone deliberately. Fixing it is a one-line change to a file every page on the
+   site shares, and the service worker was the reason to care — that now uses stale-
+   while-revalidate, which needs no version to stay current. *@
 @section Scripts {
     <script src="~/js/casino/holdem/money.js?v=@ViewData["cssVersion"]"></script>
     <script src="~/js/casino/holdem/feedback.js?v=@ViewData["cssVersion"]"></script>
     <script src="~/js/casino/holdem/potCalculator.js?v=@ViewData["cssVersion"]"></script>
     <script src="~/js/casino/holdem/state.js?v=@ViewData["cssVersion"]"></script>
+    @* After feedback.js, because the first lock it takes announces itself with a Toast. *@
+    <script src="~/js/casino/holdem/wakeLock.js?v=@ViewData["cssVersion"]"></script>
     <script src="~/js/casino/holdem/settleUp.js?v=@ViewData["cssVersion"]"></script>
     <script src="~/js/casino/holdem/render.js?v=@ViewData["cssVersion"]"></script>
+    <script src="~/js/casino/holdem/handRank.js?v=@ViewData["cssVersion"]"></script>
     <script src="~/js/casino/holdem/cardPicker.js?v=@ViewData["cssVersion"]"></script>
     <script src="~/js/casino/holdem/seatMenu.js?v=@ViewData["cssVersion"]"></script>
     <script src="~/js/casino/holdem/addChips.js?v=@ViewData["cssVersion"]"></script>

JoshHeaps.Net/Program.cs

@@ -1,6 +1,7 @@
 using JoshHeaps.Net.Hubs;
 using JoshHeaps.Net.Services.Implementations;
 using JoshHeaps.Net.Services.Interfaces;
+using Microsoft.AspNetCore.StaticFiles;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -52,8 +53,49 @@ if (!app.Environment.IsDevelopment())
 
 app.UseHttpsRedirection();
 
+// One spelling of the casino URLs, because the Hold'em tool's offline support depends
+// on it and nothing warns you when it breaks.
+//
+// Razor Pages routing is case-insensitive, so /Casino/TexasHoldem and
+// /casino/texasholdem both serve the dealer tool and look identical. A service worker's
+// scope is not: the spec matches it as a plain string prefix, so a worker scoped to
+// "/casino/" does not control a page at "/Casino/TexasHoldem". Measured, that meant the
+// capital-C spelling registered the worker, activated it, logged nothing — and then left
+// the cache completely empty, because the page was never controlled and the precache
+// handshake it waited on could not resolve. A dealer who bookmarked that URL had a tool
+// that looked loaded and had nothing stored for the night the signal went.
+//
+// So one spelling wins and the other is redirected to it, permanently, before anything
+// else in the pipeline gets a look.
+//
+// Deliberately scoped to /casino rather than applied site-wide. Every file under
+// wwwroot/casino and wwwroot/images/casino is already lowercase, so lowercasing a path
+// here can never miss a real file on a case-sensitive filesystem — a guarantee that does
+// not hold for the rest of the site, and one that /chessHub in particular would break.
+app.Use(async (context, next) =>
+{
+    var path = context.Request.Path.Value;
+    if (path is not null
+        && path.StartsWith("/casino", StringComparison.OrdinalIgnoreCase)
+        && path.Any(char.IsUpper))
+    {
+        context.Response.Redirect(path.ToLowerInvariant() + context.Request.QueryString, permanent: true);
+        return;
+    }
+
+    await next();
+});
+
+// .webmanifest isn't in the default MIME map, and an unknown extension isn't served
+// with the wrong type — it isn't served at all. Without this the Hold'em tool's
+// manifest 404s, and a 404 manifest is exactly the silent failure that stops a browser
+// ever offering "Add to Home Screen": nothing is logged and no prompt appears.
+var contentTypes = new FileExtensionContentTypeProvider();
+contentTypes.Mappings[".webmanifest"] = "application/manifest+json";
+
 app.UseStaticFiles(new StaticFileOptions
 {
+    ContentTypeProvider = contentTypes,
     OnPrepareResponse = ctx =>
     {
         ctx.Context.Response.Headers.Append("Cache-Control", "no-cache, no-store, must-revalidate");

JoshHeaps.Net/wwwroot/casino/holdem.webmanifest

@@ -0,0 +1,32 @@
+{
+  "name": "Texas Hold'em Dealer",
+  "short_name": "Hold'em",
+  "description": "Seat your players, track the action, split the pot. Works with no signal.",
+  "start_url": "/casino/texasholdem",
+  "scope": "/casino/",
+  "display": "standalone",
+  "orientation": "any",
+  "background_color": "#141414",
+  "theme_color": "#141414",
+  "categories": ["utilities"],
+  "icons": [
+    {
+      "src": "/images/casino/holdem-192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/images/casino/holdem-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/images/casino/holdem-maskable-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    }
+  ]
+}

JoshHeaps.Net/wwwroot/casino/sw.js

@@ -0,0 +1,125 @@
+// Keeps the dealer tool working when the network doesn't.
+//
+// A home game is the worst network in the world: somebody's back room, one bar of
+// signal, a router two floors away. The tool already keeps the whole night in
+// localStorage, so the *table* survives anything — but the page didn't. Reload with no
+// signal, or open it fresh when the wifi has dropped, and a dealer holding a phone in
+// one hand and a deck in the other got a browser error page with nine players waiting.
+//
+// This is the one thing standing between "a website about poker" and "a tool you can
+// rely on at a table", so it is worth the moving part.
+//
+// Scope is /casino/ rather than /casino/texasholdem/, because a scope has to be a
+// prefix of the page it controls and "/casino/texasholdem" does not start with
+// "/casino/texasholdem/". Anything in that scope this worker has not been told about
+// goes straight to the network, so the other casino pages behave exactly as they did.
+
+// Bumped whenever the shape of what is cached changes. The asset *version* rides in
+// the URLs themselves (?v=1.0.8 from _Layout), so a normal release makes new keys
+// without touching this.
+const CACHE = "holdem-shell-v1";
+
+// What this worker will keep. Anything else in scope — a form post, an API call, a
+// page it was never told about — goes straight to the network and behaves exactly as
+// it did before the worker existed.
+const CACHEABLE = new Set(["script", "style", "image", "font", "manifest"]);
+
+// The page hands over the exact list of URLs it was built from — see registerWorker()
+// in main.js. Deriving it from the document instead of keeping a list here is the
+// whole trick: a hand-written manifest of files drifts from the markup the first time
+// somebody adds a script tag, and the failure mode is a tool that is offline-capable
+// right up until the release that quietly broke it.
+async function precache(urls) {
+    const cache = await caches.open(CACHE);
+    // Individually rather than cache.addAll, which rejects the whole batch if any one
+    // URL 404s — one stale entry in the list would leave the dealer with nothing.
+    await Promise.all(urls.map(async url => {
+        try {
+            const res = await fetch(url, { cache: "reload" });
+            if (res.ok) await cache.put(url, res);
+        } catch {
+            // Offline while installing. The runtime handler below picks these up on
+            // the next online visit.
+        }
+    }));
+}
+
+// No install handler, and deliberately no skipWaiting(). A new worker taking over a
+// live page can hand it assets from a different release than the ones it started with,
+// and this page loads seventeen separate scripts that expect to agree with each other.
+// Waiting costs a dealer nothing — the update lands the next time they open the tool —
+// and it cannot leave them with a half-swapped app in the middle of a hand.
+
+self.addEventListener("activate", event => {
+    event.waitUntil((async () => {
+        const keys = await caches.keys();
+        await Promise.all(keys
+            .filter(key => key.startsWith("holdem-shell-") && key !== CACHE)
+            .map(key => caches.delete(key)));
+        await self.clients.claim();
+    })());
+});
+
+self.addEventListener("message", event => {
+    if (event.data && event.data.type === "precache" && Array.isArray(event.data.urls)) {
+        event.waitUntil(precache(event.data.urls));
+    }
+});
+
+// Only GETs, and only same-origin. A cross-origin request has opaque responses that
+// can't be inspected, and caching one would mean serving a failure forever.
+function handles(request) {
+    if (request.method !== "GET") return false;
+    const url = new URL(request.url);
+    return url.origin === self.location.origin;
+}
+
+self.addEventListener("fetch", event => {
+    const { request } = event;
+    if (!handles(request)) return;
+
+    // The page itself: network first, so an online dealer always gets the current
+    // build, and the cached copy is there the moment they aren't.
+    if (request.mode === "navigate") {
+        event.respondWith((async () => {
+            try {
+                const fresh = await fetch(request);
+                if (fresh.ok) (await caches.open(CACHE)).put(request, fresh.clone());
+                return fresh;
+            } catch {
+                const cached = await caches.match(request, { ignoreSearch: true });
+                if (cached) return cached;
+                throw new Error("offline and this page was never cached");
+            }
+        })());
+        return;
+    }
+
+    // Assets: stale while revalidate. The cached copy answers immediately — which is
+    // the whole point, a dealer opening this between hands should not wait for a
+    // network — and a fresh copy is fetched in the background for next time.
+    //
+    // Cache-first would be the obvious choice, on the reasoning that these URLs carry
+    // ?v= from the layout and so a hit is always the right file. They don't: the
+    // version renders empty (see the note in TexasHoldem.cshtml), so every release
+    // reuses the same URLs. Cache-first against unversioned URLs is how a tool gets
+    // frozen on a build from three months ago with no way for anyone to tell. This
+    // strategy needs no version to be correct: worst case a dealer is one launch
+    // behind, which for a tool that runs entirely in the browser is nothing.
+    if (!CACHEABLE.has(request.destination)) return;
+
+    event.respondWith((async () => {
+        const cache = await caches.open(CACHE);
+        const cached = await cache.match(request);
+
+        const fresh = fetch(request).then(res => {
+            if (res.ok) cache.put(request, res.clone());
+            return res;
+        }).catch(() => null);
+
+        if (cached) return cached;
+        const res = await fresh;
+        if (res) return res;
+        throw new Error("offline and not cached: " + request.url);
+    })());
+});

JoshHeaps.Net/wwwroot/css/casino/quicksplit.css

@@ -148,9 +148,13 @@ button,
     color: #8f8f8f;
 }
 
+/* 37px tall, on the field a dealer types every amount into. The touch rule has been
+   44px everywhere else since the round that set it; this page never got measured for
+   it, because the audit only ran the target check when asked and nothing asked. */
 .unevenAmount {
     flex: 1;
     min-width: 0;
+    min-height: 46px;
     background: none;
     border: none;
     outline: none;
@@ -180,10 +184,12 @@ button,
     color: #ffd6d6;
 }
 
+/* 30px across, and it deletes a player's entry — the one control on the row where a
+   near miss costs something. The amount field beside it gives up the 16px. */
 .unevenRemoveBtn {
     flex: none;
-    width: 30px;
-    height: 44px;
+    width: 46px;
+    height: 46px;
     border: none;
     background: none;
     /* Was #6a6a6a — 3.66:1, the worst on the page, on a control that deletes a

JoshHeaps.Net/wwwroot/js/casino/holdem/actionBar.js

@@ -32,11 +32,23 @@ const ActionBar = {
 
         const publish = () => {
             const visible = !host.hidden;
-            const height = visible ? host.getBoundingClientRect().height : 0;
+            const rail = this.isRail(host);
+            // On a phone held sideways the bar is a rail down the right-hand side, so it
+            // takes no height at all — and `--actionBarHeight` is what four other rules
+            // and the felt measurement all mean by "how much of the bottom is spoken
+            // for". Publishing the rail's height there would reserve the whole window.
+            const height = visible && !rail ? host.getBoundingClientRect().height : 0;
             document.documentElement.style.setProperty("--actionBarHeight", `${Math.round(height)}px`);
-            this.publishFeltRoom(height);
+            // What is under the felt is the bar in one layout and the two links in the
+            // other. Either way it is the same question — how much of the bottom is
+            // already spoken for — so it is the same argument.
+            this.publishFeltRoom(rail ? this.roomBelowFelt() : height);
         };
 
+        // Kept so anything that moves the table without touching the bar can ask for
+        // the felt to be measured again — the board strip appearing above it does
+        // exactly that, and the felt's height is worked out from where the table starts.
+        this.publishHeight = publish;
         if (typeof ResizeObserver === "function") {
             this.heightWatcher = new ResizeObserver(publish);
             this.heightWatcher.observe(host);
@@ -46,6 +58,33 @@ const ActionBar = {
         publish();
     },
 
+    // Is the bar a rail down the side rather than a bar across the bottom?
+    //
+    // Asked of the stylesheet rather than answered again here. The layout is chosen by
+    // a media query — orientation, height and width together — and a second copy of
+    // that query written in JavaScript is a copy that drifts: the first thing anyone
+    // changes is the breakpoint, in one of the two places. So the CSS declares which
+    // layout it picked in a custom property and this reads the answer back.
+    isRail(host) {
+        if (!host || typeof getComputedStyle !== "function") return false;
+        return getComputedStyle(host).getPropertyValue("--actionBarLayout").trim() === "rail";
+    },
+
+    // What sits between the bottom of the felt and the bottom of the window when the
+    // bar is off to one side: the table hint and the row of links under it. Measured,
+    // because both come and go — the hint is empty mid-hand and the links wrap on the
+    // narrowest column.
+    // Taken as the distance from the bottom of the felt to the bottom of the section it
+    // sits in, which is a difference rather than a height — so it doesn't move when the
+    // felt's own height changes, and this can't chase itself around the screen.
+    roomBelowFelt() {
+        const wrap = document.getElementById("pokerTableWrap");
+        const section = wrap && wrap.parentElement;
+        if (!section) return 0;
+        const gap = section.getBoundingClientRect().bottom - wrap.getBoundingClientRect().bottom;
+        return Math.max(0, Math.round(gap));
+    },
+
     // Half a seat, the gap left under the lowest one, and the smallest felt worth
     // drawing. A seat is about 73px tall at every width — the puck is text-sized, not
     // table-sized — so the overhang is a constant rather than something read back off
@@ -86,9 +125,27 @@ const ActionBar = {
         // header in normal flow, so its own height never moves its top and this can't
         // chase itself around the screen.
         const topInDocument = wrap.getBoundingClientRect().top + window.scrollY;
-        document.documentElement.style.setProperty(
-            "--feltRoomPx",
-            `${this.feltRoomFor(window.innerHeight, barHeight, topInDocument)}px`);
+        const root = document.documentElement;
+        const was = root.style.getPropertyValue("--feltRoomPx");
+        const now = `${this.feltRoomFor(window.innerHeight, barHeight, topInDocument)}px`;
+        root.style.setProperty("--feltRoomPx", now);
+        // The felt has just changed size, so how much rim each seat gets has changed
+        // with it. Told rather than left to be noticed on the next render, which on a
+        // bar that grew mid-hand could be several actions away.
+        if (typeof Render === "undefined" || !Render.state) return;
+        if (Render.updateSeatDensity) Render.updateSeatDensity();
+
+        // And when it really did change size, the seats are laid out again rather than
+        // only re-measured.
+        //
+        // The seats follow a felt on their own — they are placed in percentages of it —
+        // but a bet chip anchored inside a seat is placed in pixels off that seat's
+        // centre, worked out against the felt as it was. Nothing re-ran that. Measured
+        // at 640x360 with five players: the chips were positioned for a felt 83px tall,
+        // painted on one of 60, and seat 3's $5 came to rest on seat 4's puck. The bar
+        // growing mid-hand does this too — a side pot appearing is 55px off the felt —
+        // so it is not only the board strip that could reach it.
+        if (now !== was && Render.renderSeats) Render.renderSeats();
     },
 
     // Anything to act on? A hand with nobody dealt in doesn't get a bar — and that
@@ -109,12 +166,19 @@ const ActionBar = {
         if (!host) return;
         host.innerHTML = "";
 
+        // A table with nobody at it used to hide this bar altogether, which meant the
+        // one moment a dealer has never used the tool before is the one moment it says
+        // nothing at all. What they got instead was a felt printing EMPTY ten times and
+        // a green Resolve Pot button that would resolve nothing.
+        //
+        // An empty table is a state with an obvious next step, so it says what it is.
         if (!this.isRunning()) {
-            host.hidden = true;
-            document.body.classList.remove("hasActionBar");
-            document.documentElement.style.setProperty("--actionBarHeight", "0px");
+            host.hidden = false;
+            document.body.classList.add("hasActionBar");
+            host.appendChild(this.renderEmptyTable());
             this.stopTankTimer();
             this.tankSeatIndex = null;
+            this.announce();
             return;
         }
         host.hidden = false;
@@ -138,12 +202,104 @@ const ActionBar = {
         }
 
         this.syncTankTimer();
+        this.announce();
+    },
+
+    // The empty table. One sentence and one button, in the place every other prompt in
+    // this tool appears, so a dealer who has never opened it before is looking at the
+    // next step rather than at ten chairs labelled EMPTY.
+    renderEmptyTable() {
+        const wrap = document.createElement("div");
+        wrap.className = "dealPrompt";
+
+        const line = document.createElement("p");
+        line.className = "dealPromptLine";
+        line.textContent = "Nobody's at the table yet.";
+        wrap.appendChild(line);
+
+        const buttons = document.createElement("div");
+        buttons.className = "dealPromptButtons";
+
+        const seat = document.createElement("button");
+        seat.type = "button";
+        seat.className = "actionBtn actionDeal";
+        seat.textContent = "Seat a player";
+        seat.addEventListener("click", () => this.hooks.seatFirstPlayer());
+        buttons.appendChild(seat);
+
+        wrap.appendChild(buttons);
+        return wrap;
+    },
+
+    // One sentence, for anyone running this by ear.
+    //
+    // The bar used to carry aria-live itself, and because render() rebuilds the whole
+    // thing every action, a screen reader read the lot out after every tap — street,
+    // pot, player count, who's short, the clock, the undo label and all three buttons.
+    // Nothing in that is wrong; it is just unusable at the speed a hand is dealt.
+    //
+    // What a dealer actually needs from the tool between taps is who is on the clock
+    // and what it costs them. That is what this says, into a small element that exists
+    // from page load and only ever has its text replaced.
+    //
+    // Guarded on the sentence itself rather than on the state, because render() is
+    // called for a great many reasons that don't change whose turn it is — resizing the
+    // window, opening a panel, editing a note — and a live region that repeats itself
+    // is read out again every time.
+    announce() {
+        const target = document.getElementById("actionAnnouncer");
+        if (!target) return;
+
+        const said = this.announcement();
+        if (said === this.lastAnnouncement) return;
+        this.lastAnnouncement = said;
+        target.textContent = said;
+    },
+
+    announcement() {
+        const state = this.state;
+        if (!this.isRunning()) return "Nobody's at the table yet.";
+        if (!state.bettingOpen) {
+            const preview = Betting.blindPreview(state);
+            return preview ? "Ready to deal." : "";
+        }
+        if (Betting.isHandOver(state)) return "Hand over. Resolve the pot.";
+
+        const index = state.actingSeatIndex;
+        if (index === null || index === undefined) {
+            return `${Betting.streetLabel(state.street)} betting is done.`;
+        }
+
+        const player = state.seats[index];
+        const name = HoldemState.displayName(player, index);
+        const owed = Betting.toCall(state, player);
+        const cost = owed > 0 ? `${Money.format(owed)} to call` : "checked to them";
+        return `${name} to act, ${cost}. Pot ${Money.format(Betting.potSoFar(state))}.`;
+    },
+
+    // Pure, so the wording can be checked without a page to hang it on — the same reason
+    // Render.panelGlances is. A table that has never dealt is on hand one, not hand
+    // zero and not hand undefined, and that fallback is the whole of what there is to
+    // get wrong here.
+    handLabel(state) {
+        return `#${(state && state.handNumber) || 1}`;
     },
 
     renderStatus() {
         const row = document.createElement("div");
         row.className = "actionStatus";
 
+        // Which hand this is. It used to be a gold pill beside the page title, and it
+        // was the wrong fact in the wrong place: a counter that changes once a hand,
+        // read after the fact, holding a line of a 390px phone's header all night. It
+        // belongs with the street, the pot and the player count — the other three
+        // things that say what hand you are in — and here it costs nothing, because
+        // this row was already drawn.
+        const hand = document.createElement("span");
+        hand.className = "actionHand";
+        hand.textContent = this.handLabel(this.state);
+        row.appendChild(hand);
+
         const street = document.createElement("span");
         street.className = "actionStreet";
         street.textContent = Betting.streetLabel(this.state.street);
@@ -171,8 +327,12 @@ const ActionBar = {
         if (Betting.isRunningOut(this.state) && !Betting.isHandOver(this.state)) {
             const runout = document.createElement("span");
             runout.className = "actionRunout";
-            const stillIn = Betting.liveSeats(this.state).length;
-            runout.textContent = `All-in — running out the board (${stillIn} players)`;
+            // It used to end "(12 players)", which is the number the chip immediately to
+            // its left already says, in the same row, at the same moment. Saying it
+            // twice in one breath reads like two different figures being quoted, and on
+            // a 360px phone it cost the sentence a second line — which the felt paid
+            // for, on the one table shape that has twelve seats to fit.
+            runout.textContent = "All-in — running out the board";
             row.appendChild(runout);
         }
 
@@ -190,6 +350,32 @@ const ActionBar = {
             tank.title = "How long this player has been thinking";
             tank.textContent = "0:00";
             row.appendChild(tank);
+
+            // Rendered every time and shown by the tick once the wait is long enough
+            // to be worth it, so a clock never costs a re-render at the moment the
+            // dealer reaches for it — and never occupies the bar in the ordinary case
+            // where nobody is holding anybody up.
+            const clock = document.createElement("button");
+            clock.type = "button";
+            clock.id = "actionClockBtn";
+            clock.className = "actionClockBtn";
+            // Once the count is over there is nothing to stop: the ruling has been
+            // made, and the dealer either carries it out or takes an ordinary action,
+            // both of which end the clock themselves. Leaving the button there also
+            // cost real room — at 640x360 its 94px pushed the undo control onto a
+            // second line, and the taller bar covered the two bottom seats.
+            const expiredNow = this.clockRunning() && this.clockLeft() === 0;
+            clock.hidden = !this.clockRunning() || expiredNow;
+            if (this.clockRunning()) {
+                clock.textContent = "Stop the clock";
+                clock.title = "Put the decision back in the player's own time";
+                clock.addEventListener("click", () => { this.stopClock(); this.render(); });
+            } else {
+                clock.textContent = "Call the clock";
+                clock.title = `${this.CLOCK_THINK_S} seconds, then a ${this.CLOCK_COUNTDOWN_S}-second countdown`;
+                clock.addEventListener("click", () => this.callClock());
+            }
+            row.appendChild(clock);
         }
 
         // A standing control rather than a toast per action: a dealer taps this bar
@@ -201,7 +387,17 @@ const ActionBar = {
             undo.type = "button";
             undo.className = "actionUndo";
             undo.title = `Undo ${undoLabel}`;
-            undo.textContent = `↶ ${undoLabel}`;
+            // The label goes in its own element rather than straight onto the button.
+            // The pill is a fixed width — it names the last action, so its text changes
+            // on every tap, and a control that resizes under the dealer's thumb reads
+            // as the interface twitching. Fixed width means long labels have to
+            // ellipsize, and only a real element can: as a bare text node the label
+            // truncated *through* the keycap below it, which then sat squashed against
+            // the cut-off text looking like a rendering fault.
+            const label = document.createElement("span");
+            label.className = "actionUndoLabel";
+            label.textContent = `↶ ${undoLabel}`;
+            undo.appendChild(label);
             // U undoes, and nothing said so — this control was the only place a dealer
             // could have learned it, and it was the one action bar control without its
             // key printed on it.
@@ -229,6 +425,74 @@ const ActionBar = {
     NUDGE_AFTER_S: 30,
     SLOW_AFTER_S: 60,
 
+    // ---- Calling the clock ----
+    //
+    // The stopwatch above says how long somebody has been thinking. This is what a
+    // dealer does about it, and it is a procedure with a shape: a player asks for a
+    // clock, the dealer grants it, the player gets a set time and then a countdown,
+    // and if they still haven't acted the hand is decided for them — dead if they were
+    // facing a bet, checked if they weren't.
+    //
+    // The tool knew none of that. A dealer running it had to count in their head while
+    // the table argued about whether it had been thirty seconds, which is the moment
+    // the count needs to be somewhere everybody can see.
+    //
+    // Thirty seconds and then a ten-second countdown is the common form of the rule and
+    // what the TDA writes down. The countdown is the part the table hears out loud, so
+    // it is marked separately rather than being ten more seconds of the same.
+    CLOCK_THINK_S: 30,
+    CLOCK_COUNTDOWN_S: 10,
+
+    clockSeatIndex: null,
+    clockStartedAt: null,
+
+    clockRunning() {
+        return this.clockSeatIndex !== null &&
+            this.clockSeatIndex === this.state.actingSeatIndex &&
+            this.clockStartedAt !== null;
+    },
+
+    // Seconds left before the hand is decided, or null when no clock is running.
+    // Negative is impossible: it stops at zero and stays there until the dealer acts.
+    clockLeft(now = Date.now()) {
+        if (!this.clockRunning()) return null;
+        const total = this.CLOCK_THINK_S + this.CLOCK_COUNTDOWN_S;
+        return Math.max(0, total - Math.floor((now - this.clockStartedAt) / 1000));
+    },
+
+    // What happens when it reaches zero, in the words the dealer says out loud.
+    // Facing a bet, the hand is dead. Facing none, it is checked — a player who could
+    // have checked for free is not folded for being slow.
+    clockRuling() {
+        const index = this.state.actingSeatIndex;
+        if (index === null || index === undefined) return null;
+        const player = this.state.seats[index];
+        const owed = Betting.toCall(this.state, player);
+        const who = HoldemState.displayName(player, index);
+        return owed > 0
+            ? { index, who, verb: "fold", label: `Time — ${who}'s hand is dead`, say: `${who} is facing ${Money.format(owed)}, so the hand is dead.` }
+            : { index, who, verb: "check", label: `Time — check for ${who}`, say: `${who} had nothing to call, so the hand is checked.` };
+    },
+
+    callClock() {
+        const index = this.state.actingSeatIndex;
+        if (index === null || index === undefined) return;
+        this.clockSeatIndex = index;
+        this.clockStartedAt = Date.now();
+        this.clockExpiredShown = false;
+        this.render();
+    },
+
+    stopClock() {
+        this.clockSeatIndex = null;
+        this.clockStartedAt = null;
+        this.clockExpiredShown = false;
+    },
+
+    // Whether the bar has already been rebuilt into its "time is up" shape, so the
+    // one-second tick doesn't rebuild it again every second afterwards.
+    clockExpiredShown: false,
+
     tankSeatIndex: null,
     tankStartedAt: null,
     tankInterval: null,
@@ -258,6 +522,11 @@ const ActionBar = {
             if (this.tankSeatIndex !== null) this.tankUnknownFor = null;
             this.tankSeatIndex = index;
             this.tankStartedAt = Date.now();
+            // A clock belongs to one player's decision. The moment the action moves —
+            // because they acted, or because the dealer took something back — it is
+            // over, and leaving it running would put the next player on a countdown
+            // nobody called on them.
+            this.stopClock();
         }
 
         if (!this.tankInterval) {
@@ -279,6 +548,36 @@ const ActionBar = {
         const el = document.getElementById("actionTank");
         if (!el || this.tankStartedAt === null) return;
 
+        // A clock takes the readout over: the number the table is waiting on is no
+        // longer how long this has taken but how long is left. At zero the bar has to
+        // change shape — a ruling and the button that carries it out — so that one
+        // gets a full render, once, rather than being painted in by the tick.
+        const left = this.clockLeft();
+        if (left !== null) {
+            if (left === 0 && !this.clockExpiredShown) {
+                this.clockExpiredShown = true;
+                this.render();
+                return;
+            }
+            el.textContent = left <= this.CLOCK_COUNTDOWN_S ? `${left}` : this.formatTank(left);
+            el.title = "Time left before the hand is decided";
+            el.classList.toggle("tankNudge", left > this.CLOCK_COUNTDOWN_S);
+            el.classList.toggle("tankSlow", left <= this.CLOCK_COUNTDOWN_S);
+            return;
+        }
+
+        // The button that starts a clock is offered once somebody has been thinking
+        // long enough for the table to start asking — which is the same threshold the
+        // stopwatch already marks. Before that it is a control nobody needs, and this
+        // bar is docked over the seats.
+        const nudge = document.getElementById("actionClockBtn");
+        if (nudge && !this.clockRunning()) {
+            const waited = Math.floor((Date.now() - this.tankStartedAt) / 1000);
+            nudge.hidden = this.tankUnknownFor === this.tankSeatIndex
+                ? false
+                : waited < this.NUDGE_AFTER_S;
+        }
+
         if (this.tankUnknownFor !== null && this.tankSeatIndex === this.tankUnknownFor) {
             el.textContent = "—";
             el.title = "The action was already on this seat when the page loaded, so there's nothing to time from yet. The clock starts when the action next moves.";
@@ -330,10 +629,20 @@ const ActionBar = {
             this.state.seats.map((player, index) => [player.id, HoldemState.displayName(player, index)])
         );
 
+        // Four is what the bar can hold without taking the felt with it — see
+        // buildPotBreakdown for the measurements, and uiAudit's fixedFurniture check
+        // for the ceiling this is keeping the bar under.
+        //
+        // Two, once the run-out has started, for the reason spelled out over there: the
+        // list is decision support, and during a run-out there is no decision left to
+        // support. The felt gets the difference, on the one table shape that has the
+        // most seats to fit into it.
         return Render.buildPotBreakdown(
             PotCalculator.layers(contributions),
             PotCalculator.uncalledReturns(contributions),
-            id => nameById.get(id)
+            id => nameById.get(id),
+            null,
+            { maxLayers: 4, summarise: Betting.isRunningOut(this.state) }
         );
     },
 
@@ -388,6 +697,19 @@ const ActionBar = {
     // recorded so it can be taken back. A misclick on Fold is the one mistake in this
     // tool a dealer can't talk their way out of.
     commit(label, mutate) {
+        // A toast is news about the last thing that happened, and this is the next
+        // thing: whatever it says is now out of date. Two reasons it goes rather than
+        // waiting out its eight seconds. It lies — "Next hand — button on seat 2.
+        // [Undo]" reads as an offer to move the button back, but the snapshot behind
+        // that Undo predates the hand you have since dealt, so taking it would throw
+        // the hand away without saying so. And it is in the way: measured across the
+        // sweep, a toast left up over a dealt table covered seats, the clock button
+        // or the bar's own Undo on thirty of the small screens it was checked at,
+        // because there is nowhere on a 360x640 phone for a 560px strip to go. The
+        // bar's own Undo control takes over from here, and it names the step it
+        // would actually take back.
+        if (typeof Toast !== "undefined" && Toast.dismiss) Toast.dismiss();
+
         this.hooks.beginAction(label);
         mutate();
         this.hooks.save(this.state);
@@ -401,6 +723,36 @@ const ActionBar = {
         const stack = Betting.stackOf(this.state, player);
         const who = HoldemState.displayName(player, index);
 
+        // Time is up. The ruling goes on the bar in the words the dealer says out loud,
+        // with the one action that carries it out — and the ordinary buttons stay
+        // underneath, because a player who speaks up as the count ends is still acting
+        // and the dealer is the one who decides whether it was in time.
+        const expired = this.clockLeft() === 0 ? this.clockRuling() : null;
+        const wrap = document.createElement("div");
+        if (expired) {
+            const line = document.createElement("p");
+            line.className = "clockExpired";
+            // The ruling in one sentence. `label` is the same call in three words for
+            // the button beside it; saying both left the line doubling back on itself
+            // — "Time — Dee's hand is dead — Dee is facing $2, so the hand is dead."
+            line.textContent = `Time — ${expired.say}`;
+            wrap.appendChild(line);
+
+            const enforce = document.createElement("div");
+            enforce.className = "actionButtons";
+            enforce.appendChild(this.button(
+                expired.verb === "fold" ? `Kill ${expired.who}'s hand` : `Check for ${expired.who}`,
+                "actionEnforceClock",
+                () => this.commit(
+                    expired.verb === "fold" ? `${expired.who}'s hand killed on the clock` : `${expired.who}'s check on the clock`,
+                    () => {
+                        this.stopClock();
+                        if (expired.verb === "fold") Betting.fold(this.state, index);
+                        else Betting.check(this.state, index);
+                    })));
+            wrap.appendChild(enforce);
+        }
+
         const row = document.createElement("div");
         row.className = "actionButtons";
 
@@ -427,7 +779,9 @@ const ActionBar = {
             }));
         }
 
-        return row;
+        if (!expired) return row;
+        wrap.appendChild(row);
+        return wrap;
     },
 
     // Quick amounts first, keypad second — a dealer calling "raise to sixty" wants a
@@ -683,7 +1037,7 @@ const ActionBar = {
                     if (!field) return;
                     const panel = field.closest("details");
                     if (panel) panel.open = true;
-                    field.scrollIntoView({ block: "center", behavior: "smooth" });
+                    Render.bringIntoView(field, { block: "center" });
                     field.focus();
                     field.select();
                 }));
@@ -814,6 +1168,11 @@ const ActionBar = {
         // happens, too — say the straddle, then deal.
         this.straddleButtons(preview).forEach(button => row.appendChild(button));
         row.appendChild(this.button("Post blinds & deal", "actionDeal", () => {
+            // The first hand is the moment this stops being a setup screen and starts
+            // being a night somebody could lose. It is also a tap, which is what every
+            // browser wants the "keep my data" request to come from — see
+            // requestDurable() in state.js. Harmless and instant after the first time.
+            if (this.hooks.keepStorage) this.hooks.keepStorage();
             this.commit("dealing the hand", () => Betting.beginHand(this.state));
         }));
         wrap.appendChild(row);
@@ -843,6 +1202,20 @@ const ActionBar = {
         return line;
     },
 
+    // The cards come over before anybody is paid.
+    //
+    // Same shape as the street button above: when the dealer has asked to be asked, the
+    // moment they press this is the moment they are holding the hands, so the sheet
+    // opens here rather than leaving them to find the seat editor for each player with
+    // the pot already on the table. Off by default, and unchanged when it's off.
+    toShowdown() {
+        if (this.state.trackBoard && typeof Render !== "undefined") {
+            Render.openShowdownPicker(() => this.hooks.resolvePot());
+            return;
+        }
+        this.hooks.resolvePot();
+    },
+
     renderStreetDone() {
         const wrap = document.createElement("div");
 
@@ -858,10 +1231,14 @@ const ActionBar = {
         row.className = "actionButtons";
         row.appendChild(this.button(label, "actionAdvance", () => {
             if (isRiver) {
-                this.hooks.resolvePot();
+                this.toShowdown();
                 return;
             }
             this.commit(`dealing the ${Betting.streetLabel(Betting.STREETS[Betting.STREETS.indexOf(this.state.street) + 1]).toLowerCase()}`, () => Betting.closeStreet(this.state));
+            // The cards that just came off the deck. Asked for here rather than left
+            // for the dealer to remember, because the moment they are holding them is
+            // the only moment they know what they are without turning the board round.
+            if (this.state.trackBoard && typeof Render !== "undefined") Render.openBoardPicker();
         }));
         wrap.appendChild(row);
 
@@ -886,7 +1263,7 @@ const ActionBar = {
         row.appendChild(this.button(
             winner ? `Award pot to ${winner}` : "Resolve pot",
             "actionAdvance",
-            () => this.hooks.resolvePot()
+            () => this.toShowdown()
         ));
         wrap.appendChild(row);
         return wrap;

JoshHeaps.Net/wwwroot/js/casino/holdem/betting.js

@@ -13,6 +13,15 @@
 const Betting = {
     STREETS: ["preflop", "flop", "turn", "river"],
 
+    // How many community cards are face up once a street has been dealt. The flop is
+    // three at once and everything after it is one at a time, which is why this is a
+    // table rather than an index.
+    BOARD_CARDS: { preflop: 0, flop: 3, turn: 4, river: 5 },
+
+    boardCardsFor(street) {
+        return this.BOARD_CARDS[street] ?? 0;
+    },
+
     streetLabel(street) {
         return { preflop: "Pre-flop", flop: "Flop", turn: "Turn", river: "River" }[street] || "Pre-flop";
     },
@@ -459,6 +468,116 @@ const Betting = {
         return (state.street || "preflop") === "preflop" && state.seats.every(p => !p.hasActed);
     },
 
+    // Are the blinds actually down? Moving the button or naming a blind means two
+    // completely different things depending on the answer, and `onlyBlindsIn` alone
+    // cannot tell them apart: a table sitting in setup, with no cards out and nothing
+    // committed, satisfies it just as well as a hand that has only just been dealt.
+    //
+    // With a hand open, the blinds are chips on the felt. Re-aiming them has to take
+    // those chips back and post them again from the new positions, or the badges and
+    // the money disagree.
+    //
+    // Before the deal it is a marker being slid round a table with nothing in the
+    // middle. Re-posting there would *deal the hand* — betting opened, blinds taken off
+    // two stacks, action on the seat after the big blind — which is not what a dealer
+    // means by "she's the big blind this one". Setting the positions is how a dealer
+    // gets ready to deal; the cards come out when they press the button, and not a
+    // moment before.
+    blindsArePosted(state) {
+        return !!state.bettingOpen && this.onlyBlindsIn(state);
+    },
+
+    // Chips the pot has been priced with but nobody has actually paid.
+    //
+    // Two ways a contribution gets into this tool. Tapping the action moves chips: the
+    // bet leaves the stack, sits in front of the player, and is swept into their hand
+    // total at the end of the street. The other way is the "without live betting" panel
+    // — a base pot amount, or chips counted out on a seat — where the dealer is
+    // recording a hand they are watching rather than driving, and nothing ever leaves
+    // anybody's stack.
+    //
+    // The pot wizard prices both the same way, and awarding it credits the winner. So
+    // in that second mode the table simply grew: measured at a three-handed table with
+    // a $50 base pot, paying the pot took the chips on the table from $600 to $750 and
+    // left the bank check blaming a rebuy that never happened.
+    //
+    // So before the pot is pushed, whatever was assumed rather than taken comes off the
+    // stacks that assumed it. Chips already committed or swept are left alone; they
+    // have been paid once already, and taking them twice is the same bug the other way
+    // round.
+    collectAssumedContributions(state) {
+        const taken = [];
+        state.seats.forEach((player, index) => {
+            const priced = HoldemState.computeContribution(player, state.chipLegend, state.basePotAmount);
+            const alreadyPaid = this.round(this.committed(player) + (Number(player.amountOverride) || 0));
+            const owed = this.round(priced - alreadyPaid);
+            if (owed <= this.EPSILON_CHIPS) return;
+
+            // Never more than they are holding. A seat priced above its own stack is a
+            // dealer's typo or a player who is short, and inventing the difference is
+            // what this whole function exists to stop.
+            const moved = this.round(Math.min(owed, this.stackOf(state, player)));
+            if (moved <= this.EPSILON_CHIPS) return;
+
+            player.stack = this.round(this.stackOf(state, player) - moved);
+            // Recorded where a swept bet lives, so the money is in exactly the place
+            // the rest of the tool looks for chips that are in the middle this hand.
+            player.amountOverride = this.round((Number(player.amountOverride) || 0) + moved);
+            taken.push({ index, name: HoldemState.displayName(player, index), amount: moved });
+        });
+        return { taken, total: this.round(taken.reduce((sum, row) => sum + row.amount, 0)) };
+    },
+
+    // A misdeal: the hand never happened, so every chip goes back where it came from.
+    //
+    // The rulings sheet in this tool has told dealers to redeal since the day it was
+    // written — first card to the wrong seat, a seat entitled to a hand dealt out, one
+    // of the first two cards exposed — and the tool had no way to do it. The only
+    // control that ended a live hand was Next Hand, which says out loud that it takes
+    // the money off the table without paying anybody. That is right for an abandoned
+    // pot and wrong for a misdeal, where the blinds and any calls belong to the people
+    // who put them in.
+    //
+    // Undo covers the first second of it — "↶ dealing the hand" is one tap — but only
+    // while the action history is still there. It lives in memory, so a dealer who
+    // refreshes the page mid-hand, or who is three calls in, has nothing.
+    //
+    // What is deliberately kept: the button, the blinds, the straddle and anyone
+    // posting in. A misdeal is the *same* hand dealt again, not the next one.
+    takeHandBack(state) {
+        const returned = [];
+        state.seats.forEach((player, index) => {
+            const back = this.round(this.committed(player) + (Number(player.amountOverride) || 0));
+            if (back > 0) {
+                player.stack = this.round(this.stackOf(state, player) + back);
+                returned.push({ index, name: HoldemState.displayName(player, index), amount: back });
+            }
+            player.committed = 0;
+            player.amountOverride = null;
+            player.hasActed = false;
+            player.folded = false;
+            player.cards = ["", ""];
+        });
+
+        state.bettingOpen = false;
+        state.street = "preflop";
+        state.currentBet = 0;
+        state.lastRaiseSize = 0;
+        state.actingSeatIndex = null;
+        state.streetAggressorIndex = null;
+        state.handAggressorIndex = null;
+        HoldemState.clearBoard(state);
+        // Nothing was posted, as far as the next rotation is concerned: the hand this
+        // would have counted as is being dealt again from the same button.
+        state.postedBlinds = null;
+        state.postedStraddles = [];
+
+        return {
+            returned,
+            total: this.round(returned.reduce((sum, row) => sum + row.amount, 0)),
+        };
+    },
+
     // Pulls the blinds back off the table and posts them again from wherever the
     // button and the blind assignment now say they belong. Refunding first is what
     // keeps the chip count straight when the button gets passed round three or four
@@ -484,6 +603,10 @@ const Betting = {
         state.street = "preflop";
         state.currentBet = 0;
         state.lastRaiseSize = 0;
+        // A fresh deal starts on an empty felt. Dealing without moving the button —
+        // after a misdeal, or a table set up and dealt twice — would otherwise leave
+        // the last hand's board sitting there being ranked against the new cards.
+        HoldemState.clearBoard(state);
         // Posting a blind isn't aggression — a hand limped and checked all the way
         // down has no aggressor at all, which is exactly the case the showdown rule
         // sends to the seat left of the button.

JoshHeaps.Net/wwwroot/js/casino/holdem/cardPicker.js

@@ -16,75 +16,147 @@ const CardPicker = {
 
     state: null,
     hooks: null,
+    // Which set of slots is being filled: a seat's two hole cards, or the five
+    // community cards. The grid, the duplicate check and the tap-to-fill behaviour are
+    // the same job either way — what changes is where the card is written and how many
+    // slots there are to walk along.
+    target: null,
     seatIndex: null,
     cardIndex: 0,
 
     open(state, hooks, seatIndex, cardIndex) {
         this.state = state;
         this.hooks = hooks;
+        this.target = "seat";
         this.seatIndex = seatIndex;
         this.cardIndex = cardIndex;
         this.render();
         document.getElementById("cardPickerOverlay").hidden = false;
     },
 
-    close() {
-        document.getElementById("cardPickerOverlay").hidden = true;
+    // The board. `limit` is how many of the five are actually out — three on the flop,
+    // four on the turn — so the sheet never offers a slot for a card the dealer has not
+    // turned over yet.
+    openBoard(state, hooks, cardIndex, limit = 5) {
+        this.state = state;
+        this.hooks = hooks;
+        this.target = "board";
+        this.seatIndex = null;
+        this.boardLimit = Math.max(1, Math.min(5, limit));
+        this.cardIndex = Math.min(cardIndex, this.boardLimit - 1);
+        this.render();
+        document.getElementById("cardPickerOverlay").hidden = false;
     },
 
-    // Every card sitting in front of anyone else. The slot being edited is excluded,
-    // so re-picking the card that's already there isn't treated as a duplicate.
+    onBoard() {
+        return this.target === "board";
+    },
+
+    // The slots the sheet is filling, whichever set that is.
+    slotValues() {
+        return this.onBoard()
+            ? (this.state.board || []).slice(0, this.boardLimit)
+            : this.state.seats[this.seatIndex].cards;
+    },
+
+    write(index, card) {
+        if (this.onBoard()) {
+            if (!Array.isArray(this.state.board)) this.state.board = ["", "", "", "", ""];
+            this.state.board[index] = card;
+            return;
+        }
+        this.state.seats[this.seatIndex].cards[index] = card;
+    },
+
+    // Why the sheet is closing, because one caller needs to tell the difference.
+    //
+    // "filled" is the sheet finishing its own job — the last empty slot it was offering
+    // got a card. "dismissed" is the dealer leaving: Done, Escape, or a tap on the scrim.
+    // A single seat's cards don't care which. A showdown does: it walks the players one
+    // at a time, and the two answers are "next player" and "stop asking".
+    //
+    // The hooks are dropped before the callback runs, so a caller that opens the sheet
+    // again from inside `onDone` installs its own and this close can't fire twice.
+    close(reason = "dismissed") {
+        document.getElementById("cardPickerOverlay").hidden = true;
+        const done = this.hooks && this.hooks.onDone;
+        this.hooks = null;
+        if (done) done(reason);
+    },
+
+    // Every card already dealt somewhere — in front of a player or face up in the
+    // middle. The slot being edited is excluded, so re-picking the card that's already
+    // there isn't treated as a duplicate.
+    //
+    // The board belongs in here as much as the hands do, and in both directions: the
+    // seven of clubs cannot be on the flop and in somebody's hand, whichever of the two
+    // the dealer is filling in at the time.
     cardsInUse() {
         const used = new Map();
         this.state.seats.forEach((player, seat) => {
             (player.cards || []).forEach((card, slot) => {
                 if (!card) return;
-                if (seat === this.seatIndex && slot === this.cardIndex) return;
+                if (!this.onBoard() && seat === this.seatIndex && slot === this.cardIndex) return;
                 used.set(card.toUpperCase(), HoldemState.displayName(player, seat));
             });
         });
+        (this.state.board || []).forEach((card, slot) => {
+            if (!card) return;
+            if (this.onBoard() && slot === this.cardIndex) return;
+            used.set(card.toUpperCase(), "the board");
+        });
         return used;
     },
 
     assign(card) {
-        const player = this.state.seats[this.seatIndex];
-        player.cards[this.cardIndex] = card;
+        this.write(this.cardIndex, card);
         this.hooks.onPick(this.seatIndex, this.cardIndex, card);
 
-        // Straight on to the second card — a dealer picking hole cards is always
-        // picking two, and making them re-open the picker doubles the taps.
-        if (this.cardIndex === 0 && !player.cards[1]) {
-            this.cardIndex = 1;
+        // Straight on to the next empty slot — a dealer picking hole cards is always
+        // picking two and a flop is always three, and making them re-open the picker
+        // between each one multiplies the taps by the only thing the sheet is for.
+        const values = this.slotValues();
+        const next = values.findIndex((value, i) => i > this.cardIndex && !value);
+        if (next !== -1) {
+            this.cardIndex = next;
             this.render();
             return;
         }
-        this.close();
+        this.close("filled");
     },
 
     clearSlot() {
-        const player = this.state.seats[this.seatIndex];
-        player.cards[this.cardIndex] = "";
+        this.write(this.cardIndex, "");
         this.hooks.onPick(this.seatIndex, this.cardIndex, "");
         this.render();
     },
 
-    render() {
-        const player = this.state.seats[this.seatIndex];
-        const used = this.cardsInUse();
+    // What this slot is called out loud: the flop's three cards, then the turn, then
+    // the river — which is what a dealer is holding when they open this, rather than
+    // "card 4".
+    boardSlotLabel(slot) {
+        return ["Flop 1", "Flop 2", "Flop 3", "Turn", "River"][slot] || `Card ${slot + 1}`;
+    },
 
-        document.getElementById("cardPickerTitle").textContent =
-            `${HoldemState.displayName(player, this.seatIndex)} — card ${this.cardIndex + 1}`;
+    render() {
+        const used = this.cardsInUse();
+        const values = this.slotValues();
+
+        document.getElementById("cardPickerTitle").textContent = this.onBoard()
+            ? `Board — ${this.boardSlotLabel(this.cardIndex).toLowerCase()}`
+            : `${HoldemState.displayName(this.state.seats[this.seatIndex], this.seatIndex)} — card ${this.cardIndex + 1}`;
 
         // Which slot the next tap fills, switchable without closing the sheet.
         const slots = document.getElementById("cardPickerSlots");
         slots.innerHTML = "";
-        [0, 1].forEach(slot => {
+        values.forEach((_, slot) => {
             const btn = document.createElement("button");
             btn.type = "button";
             btn.className = "pickerSlot";
             btn.classList.toggle("active", slot === this.cardIndex);
-            const value = player.cards[slot] || "";
+            const value = values[slot] || "";
             btn.textContent = value || "—";
+            if (this.onBoard()) btn.title = this.boardSlotLabel(slot);
             btn.classList.toggle("cardRed", /[HD]$/i.test(value));
             btn.addEventListener("click", () => {
                 this.cardIndex = slot;
@@ -105,8 +177,12 @@ const CardPicker = {
                 btn.className = "pickerCard";
                 btn.classList.toggle("cardRed", suit.red);
                 btn.disabled = !!takenBy;
-                if (takenBy) btn.title = `Already dealt to ${takenBy}`;
-                if ((player.cards[this.cardIndex] || "").toUpperCase() === card) {
+                if (takenBy) {
+                    btn.title = takenBy === "the board"
+                        ? "Already face up on the board"
+                        : `Already dealt to ${takenBy}`;
+                }
+                if ((values[this.cardIndex] || "").toUpperCase() === card) {
                     btn.classList.add("selected");
                 }
 

JoshHeaps.Net/wwwroot/js/casino/holdem/feedback.js

@@ -46,7 +46,10 @@ const Toast = {
 
         host.appendChild(toast);
         // Next frame, so the entrance transition actually runs.
-        requestAnimationFrame(() => toast.classList.add("toastVisible"));
+        requestAnimationFrame(() => {
+            toast.classList.add("toastVisible");
+            this.publishHeight();
+        });
 
         this.timer = setTimeout(
             () => this.dismiss(),
@@ -61,6 +64,24 @@ const Toast = {
         }
         const host = document.getElementById("toastHost");
         if (host) host.innerHTML = "";
+        this.publishHeight();
+    },
+
+    // How much of the bottom of the window this is standing on.
+    //
+    // The toast is fixed, so it is not in the flow and nothing scrolling a control into
+    // view knows it is there — measured on the desktop sweep, tabbing to Common rulings
+    // while a toast was up left the focus ring entirely behind it. The stylesheet adds
+    // this to the bar's own height to work out where a focused control has to stop, so
+    // it is published rather than guessed: the toast is one line or two depending on the
+    // message, and on a narrow screen the same message is taller again.
+    publishHeight() {
+        if (typeof document === "undefined" || !document.documentElement) return;
+        const host = document.getElementById("toastHost");
+        const height = host && host.firstElementChild
+            ? Math.round(host.getBoundingClientRect().height)
+            : 0;
+        document.documentElement.style.setProperty("--toastHeight", `${height}px`);
     },
 };
 

JoshHeaps.Net/wwwroot/js/casino/holdem/handHistoryExport.js

@@ -20,7 +20,11 @@ const HandHistoryExport = {
     // who owes what — doesn't work without cleaning every cell first. The commas were
     // quoted correctly, so the file parsed; it just wouldn't add up.
     toCsv(handHistory, standings = [], { notes = "" } = {}) {
-        const rows = [["Hand #", "Time", "Pot", "Payouts"]];
+        // The rake gets its own column rather than being folded into the pot: the two
+        // numbers answer different questions — what was in the middle, and what the
+        // house took out of it — and a night's worth of the second one is what the box
+        // is counted against.
+        const rows = [["Hand #", "Time", "Pot", "House take", "Payouts"]];
         // handHistory is stored newest-first; the export reads better oldest-first.
         [...handHistory].reverse().forEach(entry => {
             const payouts = (entry.payouts || [])
@@ -30,6 +34,7 @@ const HandHistoryExport = {
                 entry.handNumber,
                 this.formatTimestamp(entry.timestamp),
                 Money.forSheet(entry.pot),
+                Money.forSheet(entry.rake || 0),
                 payouts,
             ]);
         });
@@ -49,7 +54,10 @@ const HandHistoryExport = {
             rows.push(["Player", "Paid In", "Won", "Net", "Bought In", "Chips Now", "Up/Down", "Notes"]);
             standings.forEach(row => {
                 rows.push([
-                    row.name,
+                    // Somebody who has gone home is marked in the file the same way the
+                    // panel marks them, because this is the copy that gets read at the
+                    // end of the night when nobody remembers who has already been paid.
+                    row.cashedOut ? `${row.name} (paid out)` : row.name,
                     Money.forSheet(row.in),
                     Money.forSheet(row.won),
                     Money.forSheet(row.net),

JoshHeaps.Net/wwwroot/js/casino/holdem/handRank.js

@@ -0,0 +1,285 @@
+// What beats what.
+//
+// The dealer has always been the one who decides who won: the pot wizard asks "who won
+// the hand?" and pays whoever gets ticked. That is the right default — most hands are
+// won without a showdown, and at a home game the table reads the cards out loud between
+// them. But when the board is on the felt and the hands are on their backs, the tool
+// knows the answer, and reading it off a screen beats three people counting kickers.
+//
+// Cards are the same two-character strings the rest of the tool has always stored:
+// a rank from `RANKS` and a suit from S, H, D, C. Case is not significant.
+//
+// Nothing in here touches the DOM, the table, or money. It compares cards, and the pot
+// wizard decides what to do about it.
+const HandRank = {
+    RANKS: "23456789TJQKA",
+
+    // High to low. The number is the hand's category and nothing else — kickers and
+    // the rest of the tie-breaking live in the `tiebreak` array beside it.
+    STRAIGHT_FLUSH: 8,
+    FOUR_OF_A_KIND: 7,
+    FULL_HOUSE: 6,
+    FLUSH: 5,
+    STRAIGHT: 4,
+    THREE_OF_A_KIND: 3,
+    TWO_PAIR: 2,
+    ONE_PAIR: 1,
+    HIGH_CARD: 0,
+
+    // 2 through 14. Null for anything that isn't a card, which is how a half-filled
+    // slot gets told apart from a bad one.
+    rankValue(card) {
+        if (typeof card !== "string" || card.length < 2) return null;
+        const index = this.RANKS.indexOf(card[0].toUpperCase());
+        return index < 0 ? null : index + 2;
+    },
+
+    suitOf(card) {
+        if (typeof card !== "string" || card.length < 2) return null;
+        const suit = card[card.length - 1].toUpperCase();
+        return "SHDC".includes(suit) ? suit : null;
+    },
+
+    isCard(card) {
+        return this.rankValue(card) !== null && this.suitOf(card) !== null;
+    },
+
+    // Singular and plural, for reading a hand out loud.
+    NAMES: {
+        14: ["ace", "aces"], 13: ["king", "kings"], 12: ["queen", "queens"],
+        11: ["jack", "jacks"], 10: ["ten", "tens"], 9: ["nine", "nines"],
+        8: ["eight", "eights"], 7: ["seven", "sevens"], 6: ["six", "sixes"],
+        5: ["five", "fives"], 4: ["four", "fours"], 3: ["three", "threes"],
+        2: ["two", "twos"],
+    },
+
+    name(rank, plural = false) {
+        const pair = this.NAMES[rank];
+        return pair ? pair[plural ? 1 : 0] : "?";
+    },
+
+    // ---- The five-card hand -------------------------------------------------------
+
+    // Exactly five cards, ranked. Everything else is built on this.
+    //
+    // Five rather than seven because five is the hand a player actually holds, and it
+    // is small enough to check by hand — which is the whole argument for doing it this
+    // way. The seven-card version below tries all twenty-one five-card hands and keeps
+    // the best, which is a hand of poker's own definition of "your best five" written
+    // out literally. A dealer resolves one pot a hand with at most a dozen players in
+    // it; two hundred and fifty comparisons of five cards is not a cost worth trading
+    // a subtler algorithm's correctness for.
+    evaluate5(cards) {
+        if (!Array.isArray(cards) || cards.length !== 5) return null;
+        if (!cards.every(card => this.isCard(card))) return null;
+
+        const ranks = cards.map(card => this.rankValue(card)).sort((a, b) => b - a);
+        const suits = cards.map(card => this.suitOf(card));
+        const flush = suits.every(suit => suit === suits[0]);
+
+        // How many of each rank, ordered by how many first and by rank second — so
+        // the front of this list is always the rank that decides the hand.
+        const counts = new Map();
+        ranks.forEach(rank => counts.set(rank, (counts.get(rank) || 0) + 1));
+        const groups = [...counts.entries()]
+            .sort((a, b) => (b[1] - a[1]) || (b[0] - a[0]));
+        const shape = groups.map(([, count]) => count);
+        const byGroup = groups.map(([rank]) => rank);
+
+        const straightHigh = this.straightHigh(ranks);
+
+        const made = (category, tiebreak) => ({ category, tiebreak, cards: [...cards] });
+
+        if (flush && straightHigh) return made(this.STRAIGHT_FLUSH, [straightHigh]);
+        if (shape[0] === 4) return made(this.FOUR_OF_A_KIND, byGroup);
+        if (shape[0] === 3 && shape[1] === 2) return made(this.FULL_HOUSE, byGroup);
+        if (flush) return made(this.FLUSH, ranks);
+        if (straightHigh) return made(this.STRAIGHT, [straightHigh]);
+        if (shape[0] === 3) return made(this.THREE_OF_A_KIND, byGroup);
+        if (shape[0] === 2 && shape[1] === 2) return made(this.TWO_PAIR, byGroup);
+        if (shape[0] === 2) return made(this.ONE_PAIR, byGroup);
+        return made(this.HIGH_CARD, ranks);
+    },
+
+    // The top card of the straight these five ranks make, or null.
+    //
+    // The wheel is the exception the rest of the ordering has to be told about: A-2-3-4-5
+    // is a straight, and it is the *lowest* one, so its ace counts as five rather than
+    // as fourteen. Getting that wrong is how A-2-3-4-5 comes to beat 10-J-Q-K-A.
+    straightHigh(sortedDesc) {
+        const distinct = [...new Set(sortedDesc)];
+        if (distinct.length !== 5) return null;
+        if (distinct[0] - distinct[4] === 4) return distinct[0];
+        // Ace, five, four, three, two.
+        if (distinct[0] === 14 && distinct[1] === 5 && distinct[4] === 2) return 5;
+        return null;
+    },
+
+    // ---- The best five out of however many ----------------------------------------
+
+    // The best five-card hand available from five, six or seven cards — hole cards and
+    // board together, which is what Hold'em asks for. Returns null if there aren't five
+    // real cards, which is the ordinary state of a hand still being dealt.
+    best(cards) {
+        const real = (cards || []).filter(card => this.isCard(card));
+        if (real.length < 5) return null;
+        // A card in two places at once is a mis-entry, not a hand — say so rather than
+        // ranking a board that has the same king on it twice.
+        if (new Set(real.map(card => card.toUpperCase())).size !== real.length) return null;
+
+        let best = null;
+        this.eachFive(real, five => {
+            const hand = this.evaluate5(five);
+            if (!best || this.compare(hand, best) > 0) best = hand;
+        });
+        return best;
+    },
+
+    // Every five-card subset, without building an array of them.
+    eachFive(cards, visit) {
+        const n = cards.length;
+        for (let a = 0; a < n - 4; a++) {
+            for (let b = a + 1; b < n - 3; b++) {
+                for (let c = b + 1; c < n - 2; c++) {
+                    for (let d = c + 1; d < n - 1; d++) {
+                        for (let e = d + 1; e < n; e++) {
+                            visit([cards[a], cards[b], cards[c], cards[d], cards[e]]);
+                        }
+                    }
+                }
+            }
+        }
+    },
+
+    // Positive if `a` wins, negative if `b` does, zero for a chop. A chop is a real
+    // answer here rather than a rounding of one: two players playing the same board
+    // split the pot, and the fifth card decides it far more often than a table expects.
+    compare(a, b) {
+        if (!a && !b) return 0;
+        if (!a) return -1;
+        if (!b) return 1;
+        if (a.category !== b.category) return a.category - b.category;
+        const length = Math.max(a.tiebreak.length, b.tiebreak.length);
+        for (let i = 0; i < length; i++) {
+            const diff = (a.tiebreak[i] || 0) - (b.tiebreak[i] || 0);
+            if (diff !== 0) return diff;
+        }
+        return 0;
+    },
+
+    // ---- Saying it out loud -------------------------------------------------------
+
+    // What a dealer says when they turn the hand over. Named to the level that settles
+    // it and no further: "two pair, aces and eights" is the call, and the kicker only
+    // gets a mention where the tool has had to use one to break a tie.
+    describe(hand) {
+        if (!hand) return "";
+        const [first, second] = hand.tiebreak;
+        switch (hand.category) {
+            case this.STRAIGHT_FLUSH:
+                return first === 14 ? "Royal flush" : `Straight flush, ${this.name(first)} high`;
+            case this.FOUR_OF_A_KIND:
+                return `Four of a kind, ${this.name(first, true)}`;
+            case this.FULL_HOUSE:
+                return `Full house, ${this.name(first, true)} full of ${this.name(second, true)}`;
+            case this.FLUSH:
+                return `Flush, ${this.name(first)} high`;
+            case this.STRAIGHT:
+                return `Straight, ${this.name(first)} high`;
+            case this.THREE_OF_A_KIND:
+                return `Three of a kind, ${this.name(first, true)}`;
+            case this.TWO_PAIR:
+                return `Two pair, ${this.name(first, true)} and ${this.name(second, true)}`;
+            case this.ONE_PAIR:
+                return `Pair of ${this.name(first, true)}`;
+            default:
+                return `${this.name(first).charAt(0).toUpperCase()}${this.name(first).slice(1)} high`;
+        }
+    },
+
+    // The same call with the article a table would put in front of it. Not derivable
+    // from the first letter: it is "a full house" and "a flush", but "four of a kind"
+    // and "two pair" take none at all, and "an ace high" is not something anybody says.
+    // So it belongs to the category, like the name does.
+    ARTICLED: {
+        8: hand => (hand.tiebreak[0] === 14 ? "a royal flush" : "a"),
+        7: () => null,
+        6: () => "a",
+        5: () => "a",
+        4: () => "a",
+        3: () => null,
+        2: () => null,
+        1: () => "a",
+        0: () => null,
+    },
+
+    // "wins with X" — the phrase, ready to drop into a sentence.
+    phrase(hand) {
+        if (!hand) return "the best hand";
+        const described = this.describe(hand);
+        const article = (this.ARTICLED[hand.category] || (() => null))(hand);
+        if (article === null) return described.toLowerCase();
+        if (article !== "a") return article;
+        return `a ${described.toLowerCase()}`;
+    },
+
+    // ---- The showdown -------------------------------------------------------------
+
+    // Rank a set of players against a board.
+    //
+    // `players` is [{ id, cards }, ...] — the two in front of each of them. Every player
+    // is returned whether or not they could be ranked, in the order they were given, so
+    // the caller can show a row for each and say which ones it could not read. `place`
+    // is 1 for the winner and shared by a chop; a player whose cards aren't known has a
+    // null hand and no place.
+    //
+    // `complete` is the question the pot wizard actually asks: can this be trusted to
+    // pay the table. It is only true when the board is all five cards and every single
+    // player handed in has two of their own — one unknown hand and the tool cannot say
+    // who won, only who is winning so far, which is not the same thing and must not be
+    // dressed up as it.
+    showdown(board, players) {
+        const boardCards = (board || []).filter(card => this.isCard(card));
+        const boardComplete = boardCards.length === 5;
+
+        const ranked = (players || []).map(player => {
+            const hole = (player.cards || []).filter(card => this.isCard(card));
+            const hand = hole.length === 2 && boardComplete
+                ? this.best([...hole, ...boardCards])
+                : null;
+            return { id: player.id, cards: hole, hand, place: null };
+        });
+
+        const readable = ranked.filter(row => row.hand);
+        // A duplicated card anywhere means somebody has been mis-entered, and the
+        // ranking would be of a deck that doesn't exist.
+        const all = [...boardCards, ...ranked.flatMap(row => row.cards)].map(c => c.toUpperCase());
+        const duplicated = new Set(all).size !== all.length;
+
+        const sorted = [...readable].sort((a, b) => this.compare(b.hand, a.hand));
+        let place = 0;
+        sorted.forEach((row, i) => {
+            if (i === 0 || this.compare(row.hand, sorted[i - 1].hand) !== 0) place = i + 1;
+            row.place = place;
+        });
+
+        const winners = sorted.filter(row => row.place === 1);
+        const complete = boardComplete && !duplicated &&
+            ranked.length > 0 && readable.length === ranked.length;
+
+        return {
+            players: ranked,
+            winners: complete ? winners.map(row => row.id) : [],
+            boardComplete,
+            duplicated,
+            complete,
+            // Who the tool could not read, so the dialog can name them rather than
+            // just declining to help.
+            unknown: ranked.filter(row => !row.hand).map(row => row.id),
+        };
+    },
+};
+
+if (typeof module !== "undefined" && module.exports) {
+    module.exports = HandRank;
+}

JoshHeaps.Net/wwwroot/js/casino/holdem/main.js

@@ -5,6 +5,32 @@ document.addEventListener("DOMContentLoaded", () => {
     // `hidden` attribute they all already toggle.
     Modal.mount();
 
+    // ---- A scroll is not an edit ----
+    //
+    // A focused `<input type="number">` is a spinbutton, and a browser lets the mouse
+    // wheel drive it. Every other way of driving one is deliberate: the arrow keys, the
+    // little stepper arrows, typing. Scrolling is the one actuation nobody means — the
+    // dealer is reaching for another panel and the cursor happens to be over a field
+    // they touched a moment ago.
+    //
+    // Measured on the running page, at 1280x900 with the sidebar open. Focus the small
+    // blind, scroll: $5 becomes $5.50. Focus a seat's stack, scroll: $500 becomes $501.
+    // Both are written straight through to the saved table, because these fields save on
+    // `input` like everything else here. Nothing is announced, nothing looks wrong, and
+    // the tool has invented a chip.
+    //
+    // Blur rather than preventDefault. Cancelling the event would stop the value moving
+    // and stop the page moving with it, which turns a silent bug into a sidebar that
+    // mysteriously will not scroll. Dropping focus lets the scroll do what the dealer
+    // asked for and leaves the number alone — and losing focus on a field you have just
+    // scrolled away from is honest rather than surprising.
+    //
+    // Captured at the document, so it covers the fields the seat editor and the chip
+    // legend build on the fly as well as the ones in the markup.
+    document.addEventListener("wheel", event => {
+        if (Money.wheelWouldEdit(event.target, document.activeElement)) event.target.blur();
+    }, { passive: true });
+
     // Undo works by swapping the whole table back to a snapshot. `state` is handed out
     // by reference to every module at mount time, so it has to be refilled in place —
     // reassigning the variable would leave the renderer and the betting bar pointing at
@@ -56,7 +82,84 @@ document.addEventListener("DOMContentLoaded", () => {
         },
 
         onSeatLongPress: index => SeatMenu.open(state, seatMenuHooks, index),
+
+        // The waiting list, from the Session panel and from an empty chair's menu.
+        // The state change goes inside runUndoable, not before it: the snapshot is
+        // taken as the first thing that happens, so anything done ahead of it is
+        // already baked into what Undo would restore.
+        seatWaiting: (id, index) => {
+            const entry = (state.waitingList || []).find(row => row.id === id);
+            const seat = state.seats[index];
+            if (!entry || !seat) {
+                Toast.show("They aren't on the list any more.", { duration: 3000 });
+                hooks.rerender();
+                return;
+            }
+            const occupied = HoldemState.seatInPlay(seat);
+            if (occupied) {
+                Toast.show(`${HoldemState.displayName(seat, index)} is already in that seat.`, { duration: 3500 });
+                hooks.rerender();
+                return;
+            }
+            runUndoable(`${entry.name} takes seat ${index + 1}. Add their chips when they buy in.`,
+                () => HoldemState.seatFromWaitingList(state, id, index));
+        },
+
+        dropWaiting: id => {
+            const entry = (state.waitingList || []).find(row => row.id === id);
+            if (!entry) return;
+            runUndoable(`${entry.name} taken off the waiting list.`,
+                () => HoldemState.removeFromWaitingList(state, id));
+        },
         onGiveButton: index => seatMenuHooks.makeDealer(index),
+
+        // Removing a chip colour, which is only sometimes a small thing.
+        //
+        // A colour nobody has counted is a row in a legend, and taking it out should
+        // cost a click and nothing else. A colour seats are holding is money: the
+        // legend is what prices their chips, so the row leaving takes their chips off
+        // the table with it — and it cannot be put back, because a colour added again
+        // is a new one and the counts belong to the old.
+        //
+        // So the friction is on the second case only. A confirmation that fires every
+        // time is one nobody reads by the third night, and the one that matters here
+        // would go the same way as the four before it that didn't.
+        removeChipColor: async id => {
+            const usage = HoldemState.chipColorUsage(state, id);
+            if (!usage.chip) return;
+            const name = Number(usage.chip.value) > 0
+                ? `${Money.format(usage.chip.value)} chip`
+                : "chip colour";
+
+            if (usage.total !== 0) {
+                const seatCount = `${usage.seats.length} ${usage.seats.length === 1 ? "seat" : "seats"}`;
+                const held = usage.seats.map(seat => `${seat.name} ${seat.count}`).join(", ");
+                const ok = await Dialog.confirm({
+                    // Both directions are named rather than only the loss. Going up is
+                    // the odd one — seats falling back to the table's standing ante once
+                    // their chips are gone — and a dealer who is told the total will move
+                    // and then finds it moved the other way has been told something false.
+                    title: usage.total > 0
+                        ? `Remove the ${name} and ${Money.format(usage.total)} with it?`
+                        : `Remove the ${name} and put the table up ${Money.format(-usage.total)}?`,
+                    message:
+                        `${usage.chips} of them are counted onto ${seatCount} — ${held} — and the table ` +
+                        `${usage.total > 0 ? "loses" : "gains"} ${Money.format(Math.abs(usage.total))} ` +
+                        `when the colour goes. Undo will put it back; adding the colour again will not.`,
+                    confirmLabel: "Remove it",
+                    danger: usage.total > 0,
+                });
+                if (!ok) return;
+            }
+
+            runUndoable(
+                usage.total > 0
+                    ? `${name} removed — ${Money.format(usage.total)} off the table.`
+                    : usage.total < 0
+                        ? `${name} removed — table up ${Money.format(-usage.total)}.`
+                        : `${name} removed.`,
+                () => HoldemState.removeChipColor(state, id));
+        },
     };
 
     const seatMenuHooks = {
@@ -96,6 +199,39 @@ document.addEventListener("DOMContentLoaded", () => {
             });
         },
 
+        // Somebody is done for the night. The dealer counts their chips out, the chair
+        // opens, and both halves of what happened stay on the record — the cash the box
+        // took from them, and the chips it handed back. Wiping the seat by hand did
+        // neither: it left the bank check declaring their whole stack missing for the
+        // rest of the night.
+        cashOut: async index => {
+            const allowed = HoldemState.canCashOut(state, index);
+            if (!allowed.ok) {
+                Toast.show(allowed.reason, { duration: 4000 });
+                return;
+            }
+
+            const preview = HoldemState.cashOutPreview(state, index);
+            const result = preview.net === 0
+                ? "even for the night"
+                : preview.net > 0
+                    ? `up ${Money.format(preview.net)}`
+                    : `down ${Money.format(Math.abs(preview.net))}`;
+            const chips = preview.breakdown ? ` — ${preview.breakdown}` : "";
+
+            const ok = await Dialog.confirm({
+                title: `Cash out ${preview.name}?`,
+                message: `Count out ${Money.format(preview.chips)}${chips}. They bought in for ` +
+                    `${Money.format(preview.boughtIn)}, so they leave ${result}. The chair opens up, and the ` +
+                    `night's record keeps both their buy-in and this payout so the bank still balances.`,
+                confirmLabel: `Pay ${Money.format(preview.chips)}`,
+            });
+            if (!ok) return;
+
+            runUndoable(`${preview.name} cashed out for ${Money.format(preview.chips)}.`,
+                () => HoldemState.cashOut(state, index));
+        },
+
         // Two players change chairs. Undoable like every other seat action, because a
         // swap is easy to aim wrong and the seats look alike at a glance.
         swapSeats: (from, to) => {
@@ -110,12 +246,16 @@ document.addEventListener("DOMContentLoaded", () => {
         },
 
         makeDealer: index => {
+            // Moving the button to where it already is is not a move. Saying so costs a
+            // toast nobody asked for, and mid-hand it would take the blinds back off the
+            // felt and re-post the same chips to say nothing happened.
+            if (index === state.dealerSeatIndex) return;
+
             // Before the deal there's nothing posted, so this is just moving a marker.
             // After it, the blinds have to follow the button or the badges and the
             // money disagree — but that's a real thing happening to real chips, and
             // the dealer gets told rather than finding out later.
-            const willRepost = state.bettingOpen && Betting.onlyBlindsIn(state) &&
-                HoldemState.unresolvedContributions(state) > Betting.EPSILON_CHIPS;
+            const willRepost = Betting.blindsArePosted(state);
 
             seatAction(index, willRepost
                 ? `Button on ${nameOf(index)} — blinds taken back and re-posted.`
@@ -142,18 +282,29 @@ document.addEventListener("DOMContentLoaded", () => {
             if (partner === index || partner === null) partner = Betting.nextLiveIndex(state, index);
 
             const label = which === "sb" ? "small blind" : "big blind";
-            seatAction(index, `${nameOf(index)} posts the ${label}.`, () => {
+            // Only a hand that is already open has blinds to move. Before the deal this
+            // is aiming the next hand, and re-posting would have dealt it — the dealer
+            // says who the blind is well before they say "cards".
+            const posted = Betting.blindsArePosted(state);
+            seatAction(index, posted
+                ? `${nameOf(index)} posts the ${label}.`
+                : `${nameOf(index)} has the ${label} next hand.`, () => {
                 state.blindOverride = which === "sb"
                     ? { sbIndex: index, bbIndex: partner }
                     : { sbIndex: partner, bbIndex: index };
-                if (Betting.onlyBlindsIn(state)) Betting.repostBlinds(state);
+                if (posted) Betting.repostBlinds(state);
             });
         },
 
-        clearBlindOverride: () => seatAction(state.dealerSeatIndex, "Blinds follow the button again.", () => {
-            state.blindOverride = null;
-            if (Betting.onlyBlindsIn(state)) Betting.repostBlinds(state);
-        }),
+        clearBlindOverride: () => {
+            const posted = Betting.blindsArePosted(state);
+            seatAction(state.dealerSeatIndex, posted
+                ? "Blinds follow the button again — taken back and re-posted."
+                : "Blinds follow the button again.", () => {
+                state.blindOverride = null;
+                if (posted) Betting.repostBlinds(state);
+            });
+        },
 
         editSeat: index => Render.toggleSeatEditor(index),
 
@@ -185,6 +336,22 @@ document.addEventListener("DOMContentLoaded", () => {
 
     Render.mount(state, hooks);
 
+    // Table Setup used to ship open, so the tool's first screen was its most crowded
+    // one: seat count, blind direction, dedicated dealer, both blinds, starting stack
+    // and two sub-panels, all under a felt the dealer had come here to look at. It is
+    // the right panel to have open on a table nobody has touched, and the wrong one to
+    // have open on the fourth hand of a night.
+    //
+    // Decided once, here, rather than on every render — a panel that reopened itself
+    // whenever the table emptied would fight the dealer who had just shut it.
+    (() => {
+        const panel = document.getElementById("tableSetupPanel");
+        if (!panel) return;
+        const fresh = (Number(state.handNumber) || 1) === 1 &&
+            !state.seats.some(seat => HoldemState.seatInPlay(seat));
+        panel.open = fresh;
+    })();
+
     const openPotWizard = () => {
         // Chips still in front of players belong in the pot being priced, so bank them
         // before the wizard reads anyone's contribution.
@@ -192,11 +359,20 @@ document.addEventListener("DOMContentLoaded", () => {
         hooks.save(state);
         Render.renderAll();
 
-        PotWizard.open(state, payouts => {
+        PotWizard.open(state, (payouts, { rake = 0 } = {}) => {
             const paid = payouts.map(p => `${p.label} ${Money.format(p.amount)}`).join(", ");
-            runUndoable(paid ? `Paid ${paid}.` : "Hand closed with nothing to pay out.", () => {
+            const withRake = rake > 0 ? `${paid}, house ${Money.format(rake)}` : paid;
+            runUndoable(withRake ? `Paid ${withRake}.` : "Hand closed with nothing to pay out.", () => {
+                if (rake > 0) {
+                    state.rakeTaken = Money.round((Number(state.rakeTaken) || 0) + rake);
+                }
+                // Anything the pot was priced with but nobody actually paid — the
+                // base pot and counted chips of the no-live-betting flow — comes off
+                // the stacks that owe it before the winner is paid. Otherwise the
+                // table gains the whole pot out of nowhere.
+                Betting.collectAssumedContributions(state);
                 if (payouts.length > 0) {
-                    HoldemState.recordHand(state, payouts);
+                    HoldemState.recordHand(state, payouts, rake);
                     // Winnings go straight back in front of the player, so the next
                     // hand's stacks are already right.
                     Betting.creditWinnings(state, payouts);
@@ -219,6 +395,17 @@ document.addEventListener("DOMContentLoaded", () => {
         save: hooks.save,
         rerender: hooks.rerender,
         resolvePot: openPotWizard,
+        keepStorage: () => askToKeepStorage(),
+
+        // The first thing a dealer does on a table nobody is sitting at. Opens the
+        // seat editor on the first free chair — the same panel tapping the seat gives
+        // them, so the button teaches the gesture rather than replacing it.
+        seatFirstPlayer: () => {
+            const index = state.seats.findIndex(seat => !HoldemState.seatInPlay(seat));
+            Render.toggleSeatEditor(index < 0 ? 0 : index);
+            const panel = document.getElementById("seatEditorPanel");
+            Render.bringIntoView(panel, { block: "nearest" });
+        },
 
         beginAction: label => {
             actionHistory.push({ label, snapshot: snapshotState() });
@@ -300,12 +487,11 @@ document.addEventListener("DOMContentLoaded", () => {
     // in progress. Shrinking the table throws these away permanently, and it also
     // orphans them in the session standings, where they keep their winnings but lose
     // the stack and buy-in the settle-up is worked out from.
-    const seatHasSomeoneIn = player =>
-        !!(player.name && player.name.trim()) ||
-        player.inHand ||
-        (Number(player.stack) || 0) > 0 ||
-        (Number(player.buyIns) || 0) > 0 ||
-        (Number(player.amountOverride) || 0) > 0;
+    // One question, asked in one place. This predicate existed here, in the seat menu,
+    // in the action bar and twice in the state module, in four slightly different
+    // spellings — and a chair that counts as occupied for the waiting list but empty
+    // for the seat count is how somebody's chips get thrown away.
+    const seatHasSomeoneIn = player => HoldemState.seatInPlay(player);
 
     document.getElementById("seatCountInput").addEventListener("change", async e => {
         const requested = Math.max(2, Math.min(24, Math.floor(Number(e.target.value)) || state.seatCount));
@@ -349,9 +535,24 @@ document.addEventListener("DOMContentLoaded", () => {
         Render.renderTableHint();
     });
 
+    document.getElementById("trackBoardToggle").addEventListener("change", e => {
+        state.trackBoard = e.target.checked;
+        // Turning it off leaves whatever was entered in place rather than wiping it —
+        // a dealer who taps this by mistake mid-hand can tap it back and the flop is
+        // still there. The next hand clears it the way it clears everything else.
+        hooks.save(state);
+        Render.renderAll();
+    });
+
     document.getElementById("tableNotes").addEventListener("input", e => {
         state.notes = e.target.value;
         hooks.save(state);
+        // The one field on the page that must not go through renderAll: it would write
+        // the textarea's own value back into it on every keystroke and put the caret at
+        // the end. The panel's shut-state summary still has to keep up, though, and it
+        // is the only thing on the page that reads the notes — so it gets called on its
+        // own. It touches the six <span>s in the sidebar headers and nothing else.
+        Render.renderPanelGlances();
     });
 
     document.getElementById("addChipColorBtn").addEventListener("click", () => {
@@ -364,6 +565,59 @@ document.addEventListener("DOMContentLoaded", () => {
         Render.renderAll();
     });
 
+    // A misdeal. Everything in the middle goes back to whoever put it there, and the
+    // same button deals the same hand again.
+    // The seats holding the table's starting stack, written down as cash taken.
+    document.getElementById("bankRecordBuyInsBtn").addEventListener("click", async () => {
+        const starting = HoldemState.seatsOwingCash(state).filter(row => row.fromStartingStack);
+        if (starting.length === 0) return;
+        const total = Money.round(starting.reduce((sum, row) => sum + row.chips, 0));
+
+        const ok = await Dialog.confirm({
+            title: `Write down ${Money.format(total)} taken?`,
+            message: `${starting.map(row => `${row.name} ${Money.format(row.chips)}`).join(", ")} — the starting stack ` +
+                `each of them is playing with. Only do this if the cash is actually in the box.`,
+            confirmLabel: "Write it down",
+        });
+        if (!ok) return;
+
+        runUndoable(`${Money.format(total)} recorded from ${starting.length} ${starting.length === 1 ? "player" : "players"}.`,
+            () => HoldemState.recordStartingBuyIns(state));
+    });
+
+    document.getElementById("waitingListForm").addEventListener("submit", e => {
+        e.preventDefault();
+        const field = document.getElementById("waitingNameInput");
+        const name = field.value.trim();
+        if (!name) return;
+        field.value = "";
+        runUndoable(`${name} added to the waiting list.`, () => HoldemState.addToWaitingList(state, name));
+        field.focus();
+    });
+
+    document.getElementById("misdealBtn").addEventListener("click", async () => {
+        const inPlay = HoldemState.unresolvedContributions(state);
+        const acted = state.seats.filter(p => p.hasActed).length;
+
+        const ok = await Dialog.confirm({
+            title: "Misdeal — take the hand back?",
+            message: inPlay > Betting.EPSILON_CHIPS
+                ? `${Money.format(inPlay)} goes back to the players who put it in, cards are cleared, and the same ` +
+                  `button deals again.${acted > 1 ? " Note that most rooms let a deal stand once two players have acted." : ""}`
+                : "Cards are cleared and the same button deals again. Nothing has been put in yet, so no chips move.",
+            confirmLabel: "Take it back",
+        });
+        if (!ok) return;
+
+        // The label is both the toast a dealer reads now and the words on the undo
+        // control afterwards, so it says what happened to the money rather than naming
+        // the ruling: "the misdeal" told a table nothing about where their chips went.
+        const label = inPlay > Betting.EPSILON_CHIPS
+            ? `Misdeal — ${Money.format(inPlay)} returned, same button deals again.`
+            : "Misdeal — nothing was in yet, same button deals again.";
+        runUndoable(label, () => Betting.takeHandBack(state));
+    });
+
     document.getElementById("nextHandBtn").addEventListener("click", async () => {
         // Moving on wipes every seat's contribution, so an unresolved pot is simply
         // destroyed — measured at a four-handed table, pressing this with $8 in the
@@ -448,6 +702,70 @@ document.addEventListener("DOMContentLoaded", () => {
         }, 0);
     });
 
+    // Focus that lands underneath something fixed is moved out from under it.
+    //
+    // scroll-padding-bottom in the stylesheet is half of WCAG 2.4.11 and only half. It
+    // works when the browser has to scroll to reach the control at all — then the
+    // padding tells it where to stop. A control the browser already considers visible is
+    // one it will not scroll to at all, and a fixed overlay sitting on top of it does
+    // not change that: measured on a 1280x900 desktop, tabbing to Common rulings while a
+    // toast was up left it 100% covered, and scrollIntoView({block:"nearest"}) moved
+    // nothing, because "nearest" was already satisfied.
+    //
+    // So the overlap is worked out here and the page is scrolled by exactly it. Named
+    // overlays rather than every fixed element on the page, because this runs on every
+    // focus change and walking the whole DOM to find three known things would be work
+    // done ten times a second to reach the same answer. Anything inside one of them is
+    // left alone — the bar's own buttons are meant to be on top of the page.
+    const FIXED_OVERLAYS = "#actionBar, #toastHost, #seatEditorPanel";
+    document.addEventListener("focusin", event => {
+        const el = event.target;
+        if (!el || typeof el.getBoundingClientRect !== "function") return;
+        if (el.closest && el.closest(FIXED_OVERLAYS)) return;
+
+        const box = el.getBoundingClientRect();
+        if (box.width === 0 || box.height === 0) return;
+
+        let lift = 0;
+        document.querySelectorAll(FIXED_OVERLAYS).forEach(node => {
+            const style = getComputedStyle(node);
+            if (node.hidden || style.visibility === "hidden" || style.display === "none") return;
+            if (style.position !== "fixed") return;
+            const over = node.getBoundingClientRect();
+            if (over.width === 0 || over.height === 0) return;
+            // Only what is actually in the way: an overlay off to one side, like the
+            // rail on a phone held sideways, is not covering a control in the middle.
+            if (box.left >= over.right || box.right <= over.left) return;
+            if (box.bottom <= over.top || box.top >= over.bottom) return;
+            lift = Math.max(lift, box.bottom - over.top + 8);
+        });
+
+        // Instant rather than smooth. This is the page getting out of the way of
+        // something the dealer has already arrived at, and animating it would put the
+        // control they are typing into in motion under them.
+        if (lift > 0) window.scrollBy({ top: lift, behavior: "auto" });
+
+        // Scrolling is not always enough. The page only has as much room below its
+        // content as the padding under the app gives it, and that is sized for the bar
+        // — the toast stands on top of the bar, so a control at the very end of the page
+        // can be lifted clear of one and not the other. Measured at 1280x900: 94px of
+        // lift wanted, 26px of page to do it in.
+        //
+        // Sizing the padding for the toast as well would fix it by making the page grow
+        // and shrink by 64px every time anything is announced, which is a worse thing to
+        // do to a dealer than the fault. So the toast gives way instead: it is an
+        // eight-second message about something that has already happened, and it is
+        // standing on a control somebody has just navigated to. Only after the scroll
+        // has been tried, so a toast that is not in the way is left alone.
+        const toast = document.querySelector("#toastHost .toast");
+        if (!toast) return;
+        const after = el.getBoundingClientRect();
+        const over = toast.getBoundingClientRect();
+        const stillCovered = after.left < over.right && after.right > over.left &&
+            after.bottom > over.top && after.top < over.bottom;
+        if (stillCovered) Toast.dismiss();
+    });
+
     document.getElementById("resolvePotBtn").addEventListener("click", openPotWizard);
 
     [
@@ -462,8 +780,48 @@ document.addEventListener("DOMContentLoaded", () => {
         });
     });
 
+    // The house's cut. Kept as a group rather than three loose fields, because
+    // migrate() guarantees the shape and half a rake object would be a table nobody
+    // could read back.
+    const readRake = () => {
+        const percent = Number(document.getElementById("rakePercentInput").value);
+        const cap = Number(document.getElementById("rakeCapInput").value);
+        state.rake = {
+            percent: Number.isFinite(percent) ? Math.min(100, Math.max(0, percent)) : 0,
+            cap: Number.isFinite(cap) && cap > 0 ? Money.round(cap) : null,
+            noFlopNoDrop: document.getElementById("rakeNoFlopInput").checked,
+        };
+        hooks.save(state);
+        Render.renderAll();
+    };
+    ["rakePercentInput", "rakeCapInput"].forEach(id => {
+        document.getElementById(id).addEventListener("input", readRake);
+    });
+    document.getElementById("rakeNoFlopInput").addEventListener("change", readRake);
+
     document.getElementById("closeSeatEditorBtn").addEventListener("click", () => Render.closeSeatEditor());
 
+    // The two ways out of the sheet that every other overlay in the tool already had.
+    //
+    // Modal.mount() covers the six whose ids end in "Overlay"; this one cannot join
+    // them, because above 700px it is not a sheet at all — it is the sidebar panel the
+    // seat's fields live in, and a dialog is the wrong thing for Modal to make of it.
+    // So the two behaviours it was missing are wired here against the same state the
+    // scrim is drawn from.
+    document.getElementById("seatSheetScrim")
+        .addEventListener("click", () => Render.closeSeatEditor());
+
+    // Not in capture, and behind Modal's own check: a card picker opened *from* the
+    // sheet is on top of it, and Escape there means "stop picking a card", not "throw
+    // the seat away". Modal stops that event before this listener ever sees it; the
+    // guard is for the case where it hasn't, and costs nothing.
+    document.addEventListener("keydown", event => {
+        if (event.key !== "Escape") return;
+        if (Modal.open.length > 0) return;
+        if (!document.body.classList.contains("seatSheetOpen")) return;
+        Render.closeSeatEditor();
+    });
+
     document.getElementById("addChipsConfirmBtn").addEventListener("click", () => AddChips.confirm());
     document.getElementById("addChipsCancelBtn").addEventListener("click", () => AddChips.close());
     document.getElementById("addChipsOverlay").addEventListener("click", e => {
@@ -546,7 +904,7 @@ document.addEventListener("DOMContentLoaded", () => {
             // costs a screen reader the sentence.
             if (section.dataset.short) jump.setAttribute("aria-label", heading.textContent);
             jump.addEventListener("click", () => {
-                section.scrollIntoView({ block: "start", behavior: "smooth" });
+                Render.bringIntoView(section, { block: "start" });
                 // The heading is what the dealer is now reading, so that is where the
                 // keyboard and a screen reader should be too.
                 heading.setAttribute("tabindex", "-1");
@@ -695,4 +1053,164 @@ document.addEventListener("DOMContentLoaded", () => {
             "The saved table couldn't be read, so this one started empty.",
             { duration: 12000 });
     }
+
+    // ---- Keeping the screen on ----
+    //
+    // The lock itself is taken and dropped in renderAll, because that is the one place
+    // every start and end of a hand already passes through. All that lives here is the
+    // dealer's say in it: the toggle, and the way out offered by the toast the first
+    // time it takes hold.
+    WakeLock.hooks = {
+        turnOff: () => {
+            state.keepScreenAwake = false;
+            hooks.save(state);
+            Render.renderAll();
+            Toast.show("The screen will sleep as usual. Table Setup has it if you want it back.");
+        },
+    };
+    WakeLock.start(() => state);
+
+    document.getElementById("keepScreenAwakeToggle").addEventListener("change", e => {
+        state.keepScreenAwake = e.target.checked;
+        hooks.save(state);
+        // renderAll does the acquiring and releasing, so turning this off mid-hand
+        // drops the lock in the same tick rather than at the end of the hand.
+        Render.renderAll();
+    });
+
+    // ---- Asking the browser to keep the night ----
+    //
+    // Reported rather than announced. A dealer opening Save & reset is already thinking
+    // about losing the table, and that is the only moment this is worth a sentence.
+    const showStorageDurability = async () => {
+        const hint = document.getElementById("storageDurabilityHint");
+        const button = document.getElementById("keepStorageBtn");
+        if (!hint || !button) return;
+
+        if (!HoldemState.supportsDurableStorage()) {
+            // Nothing to say and nothing to offer. A browser this old still keeps the
+            // table exactly as well as it did yesterday.
+            hint.hidden = true;
+            button.hidden = true;
+            return;
+        }
+
+        const durable = await HoldemState.isDurable();
+        hint.hidden = false;
+        hint.textContent = durable
+            ? "This browser has promised to keep it: the table survives the phone running short on space."
+            : "This browser may clear the table on its own if the phone runs short on space.";
+        button.hidden = durable;
+    };
+
+    // Fires on the first deal of every session, which costs nothing after the first
+    // time it is granted — persisted() is checked before persist() is asked for.
+    const askToKeepStorage = async () => {
+        await HoldemState.requestDurable();
+        showStorageDurability();
+    };
+
+    document.getElementById("keepStorageBtn").addEventListener("click", async () => {
+        const granted = await HoldemState.requestDurable();
+        showStorageDurability();
+        // Said either way, because a button that sometimes does nothing visible is a
+        // button a dealer presses four more times.
+        Toast.show(granted
+            ? "This browser will keep the table now."
+            : "This browser wouldn't promise. Save the table to a file if tonight matters.");
+    });
+
+    showStorageDurability();
+
+    // ---- Working with no signal ----
+    //
+    // The night already survives anything — it lives in localStorage — but the page
+    // did not. Reload in a back room with one bar of signal and a dealer with nine
+    // players waiting got a browser error page. The worker below keeps the tool itself
+    // on the phone; see wwwroot/casino/sw.js for what it does and doesn't cache.
+    //
+    // The list of files to keep is read off this document rather than written down in
+    // the worker. Every stylesheet and script the page actually loaded is right here in
+    // the DOM, already carrying the ?v= release string from _Layout — so the list
+    // cannot drift from the markup, which is the way a hand-kept one always fails: it
+    // stays right until somebody adds a script tag, and then the tool is quietly
+    // offline-broken until a dealer finds out the hard way.
+    const MANIFEST_URL = "/casino/holdem.webmanifest";
+
+    // The icons are the one part of the shell the document doesn't mention: the browser
+    // reads them out of the manifest itself, so no <link> or <script> in the DOM points
+    // at them and the sweep above misses all four. An installed app that was launched
+    // with no signal then had no icon to show for itself.
+    //
+    // Read out of the manifest rather than typed out here, for the same reason the rest
+    // of the list is read out of the document — a copy of a list is a list that is one
+    // edit away from being wrong, and this particular wrongness is invisible until
+    // somebody is standing in a back room with no signal.
+    const manifestIcons = async () => {
+        try {
+            // The cache before the network, which is backwards from how the rest of this
+            // worker thinks, and right here. Offline, a plain fetch for the manifest goes
+            // to the network, fails, and logs ERR_INTERNET_DISCONNECTED to the console on
+            // every single launch — noise on the one screen where a real error needs to
+            // be visible, in service of re-reading a list of four icon paths that has not
+            // changed since the manifest was written and is already cached anyway.
+            const res = (typeof caches !== "undefined" && await caches.match(MANIFEST_URL))
+                || await fetch(MANIFEST_URL);
+            if (!res || !res.ok) return [];
+            const manifest = await res.json();
+            return (manifest.icons || [])
+                .map(icon => icon && icon.src)
+                .filter(Boolean)
+                .map(src => new URL(src, location.origin).href);
+        } catch {
+            return [];
+        }
+    };
+
+    const registerWorker = async () => {
+        if (!("serviceWorker" in navigator)) return;
+
+        const shell = [
+            location.pathname,
+            MANIFEST_URL,
+            ...await manifestIcons(),
+            // Stylesheets, plus the icons the document points at itself — iOS reads
+            // none of the manifest's icons and only <link rel="apple-touch-icon">, so
+            // an installed iPhone launched with no signal needs this one specifically.
+            ...[...document.querySelectorAll(
+                'link[rel="stylesheet"][href], link[rel="apple-touch-icon"][href], link[rel="icon"][href]'
+            )].map(el => el.href),
+            ...[...document.querySelectorAll("script[src]")].map(el => el.src),
+        ].filter(url => new URL(url, location.origin).origin === location.origin);
+
+        try {
+            const reg = await navigator.serviceWorker.register("/casino/sw.js", { scope: "/casino/" });
+
+            // Whichever worker this registration has, at whatever stage it has reached.
+            //
+            // This used to fall back on navigator.serviceWorker.ready, which resolves
+            // with the registration *controlling this page* — and so never resolves at
+            // all on a page outside the worker's scope. That is not hypothetical: it is
+            // exactly what /Casino/TexasHoldem did before the redirect in Program.cs,
+            // and the symptom was the worst kind. The registration succeeded, the worker
+            // activated, nothing was logged, and the cache stayed completely empty — a
+            // dealer who had "loaded the tool for tonight" had loaded nothing.
+            const worker = reg.installing || reg.waiting || reg.active;
+            if (!worker) return;
+
+            const send = () => worker.postMessage({ type: "precache", urls: shell });
+            if (worker.state === "activated") send();
+            else worker.addEventListener("statechange", () => {
+                if (worker.state === "activated") send();
+            });
+        } catch {
+            // No worker means no offline, and nothing else. Every other part of the
+            // tool works exactly as it did, so this is not worth a toast at a table.
+        }
+    };
+
+    // After load, not during it: registering competes with the page's own scripts for
+    // the network, and the first paint matters more than the second visit does.
+    if (document.readyState === "complete") registerWorker();
+    else window.addEventListener("load", registerWorker, { once: true });
 });

JoshHeaps.Net/wwwroot/js/casino/holdem/money.js

@@ -86,6 +86,21 @@ const Money = {
         return this.fromCents(Math.ceil(cents / step) * step);
     },
 
+    // And down, for money coming *out* of a pot rather than going into it.
+    //
+    // The rake is the one amount in this tool that leaves the table, so the direction
+    // of the rounding is a decision about whose money it is. Down: a house that can't
+    // make 40c out of its chips takes nothing rather than a dollar, and the players
+    // keep the difference. Being wrong in the players' favour is the only way to be
+    // wrong about this that nobody has to argue about.
+    downToChip(amount, legend) {
+        const step = this.chipStepCents(legend);
+        if (step <= 0) return this.round(amount);
+        const cents = this.toCents(amount);
+        if (cents <= 0) return 0;
+        return this.fromCents(Math.floor(cents / step) * step);
+    },
+
     chipBreakdown(amount, legend) {
         let cents = this.toCents(amount);
         if (cents <= 0) return { chips: [], remainder: 0 };
@@ -141,6 +156,29 @@ const Money = {
         return type === "text" && String(field.inputMode || "").toLowerCase() === "decimal";
     },
 
+    // Would a wheel over this field change what it says?
+    //
+    // True only for a focused `<input type="number">`, which a browser treats as a
+    // spinbutton and lets the wheel drive. Every other way of driving one is deliberate
+    // — the arrow keys, the stepper arrows, typing — and all of them are left alone.
+    // Scrolling is the one nobody means: the dealer is reaching for another panel and
+    // the cursor happens to still be over a field they touched a moment ago.
+    //
+    // A predicate rather than a listener so the rule can be tested without a browser,
+    // the same way selectsOnFocus is. main.js does the blurring.
+    wheelWouldEdit(field, activeElement) {
+        // The tag check is belt and braces and known to be so: nothing but an <input>
+        // carries type="number", so the line below already excludes every textarea,
+        // select and button on the page. Deleting it passes every test in this file,
+        // which was checked rather than assumed. It stays for symmetry with
+        // selectsOnFocus above, not because it is load-bearing.
+        if (!field || field.tagName !== "INPUT") return false;
+        if (String(field.type || "").toLowerCase() !== "number") return false;
+        // An unfocused spinbutton ignores the wheel, so there is nothing to defend and
+        // blurring something that isn't focused would be a no-op with a side effect.
+        return activeElement === field;
+    },
+
     // "+$40.00" / "-$40.00" rather than "$-40.00" — a standings column is read at a
     // glance, and the sign belongs out front where the eye lands first.
     formatSigned(amount) {

JoshHeaps.Net/wwwroot/js/casino/holdem/potWizard.js

@@ -76,6 +76,39 @@ const PotWizard = {
     },
 
     renderStep() {
+        this.renderStepInto();
+        this.markOverflow();
+    },
+
+    // Say when the list runs on past the bottom of the dialog.
+    //
+    // The body scrolls and the footer stays put, which is the right shape and was as far
+    // as it went: nothing on screen said there was anything below. Measured on a Galaxy
+    // S8, a three-way pot showed two names and cut the third off on a row boundary, just
+    // under a hairline that reads as the end of the list. A dealer would have ticked the
+    // two they could see. On the dialog that pays the table, a list that silently
+    // continues is not a small thing.
+    markOverflow() {
+        const body = document.getElementById("potWizardBody");
+        const modal = document.getElementById("potWizardModal");
+        if (!body || !modal) return;
+
+        const update = () => {
+            const below = body.scrollHeight - body.clientHeight - body.scrollTop;
+            modal.classList.toggle("potWizardMoreBelow", below > 1);
+        };
+        if (!this.watchingOverflow) {
+            body.addEventListener("scroll", update, { passive: true });
+            window.addEventListener("resize", update);
+            this.watchingOverflow = true;
+        }
+        update();
+        // Again once the browser has laid the step out — on the first open the body has
+        // no height yet, and an answer taken then is always "nothing below".
+        requestAnimationFrame(update);
+    },
+
+    renderStepInto() {
         // Auto-resolve any round where only one player is left standing — nothing to ask.
         let contenders = PotCalculator.getContenders(this.entries);
         while (contenders.length === 1) {
@@ -87,6 +120,11 @@ const PotWizard = {
 
         const body = document.getElementById("potWizardBody");
         body.innerHTML = "";
+        // The footer is a sibling of the body, outside the scroll — see the note in
+        // TexasHoldem.cshtml. Cleared alongside it so a step can never inherit the
+        // previous step's buttons.
+        const footer = this.footer();
+        footer.innerHTML = "";
         if (this.log.length === 0) body.appendChild(this.renderBreakdown());
         body.appendChild(this.renderLog());
 
@@ -119,13 +157,25 @@ const PotWizard = {
         const round = document.createElement("div");
         round.className = "potWizardRound";
 
+        const showdown = this.readShowdown(contenders);
+        const decided = showdown && showdown.complete ? new Set(showdown.winners) : null;
+        const handById = new Map((showdown ? showdown.players : []).map(p => [p.id, p.hand]));
+
         const prompt = document.createElement("p");
         prompt.className = "potWizardPrompt";
-        prompt.innerHTML = this.log.length === 0
-            ? `Who won the hand? <strong>${Money.format(remaining)}</strong> is in play.`
-            : `That side pot still leaves <strong>${Money.format(remaining)}</strong> unassigned — who's next best?`;
+        prompt.innerHTML = decided
+            // It has read the hands, so it stops asking a question it knows the answer
+            // to. The list stays — the dealer confirms, and a hand entered wrong is
+            // corrected by unticking rather than by starting over.
+            ? `<strong>${Money.format(remaining)}</strong> in play.`
+            : this.log.length === 0
+                ? `Who won the hand? <strong>${Money.format(remaining)}</strong> is in play.`
+                : `That side pot still leaves <strong>${Money.format(remaining)}</strong> unassigned — who's next best?`;
         round.appendChild(prompt);
 
+        const verdict = this.renderVerdict(showdown, contenders);
+        if (verdict) round.appendChild(verdict);
+
         const choices = document.createElement("div");
         choices.className = "potWizardChoices";
         contenders.forEach(c => {
@@ -135,6 +185,10 @@ const PotWizard = {
             const checkbox = document.createElement("input");
             checkbox.type = "checkbox";
             checkbox.value = c.id;
+            if (decided && decided.has(c.id)) {
+                checkbox.checked = true;
+                label.classList.add("chosen");
+            }
             // The row is the target, not the box — so the row has to look chosen too.
             checkbox.addEventListener("change", () => {
                 label.classList.toggle("chosen", checkbox.checked);
@@ -149,11 +203,25 @@ const PotWizard = {
             name.textContent = this.nameById.get(c.id);
             text.appendChild(name);
 
+            // How this hand was read, under the name — on every row rather than only
+            // the winning one, because a dealer checking the tool's answer is reading
+            // the losers' hands, and a row that says nothing is a row they have to work
+            // out for themselves. It takes the line the ceiling used to have; the
+            // ceiling moves out beside the name, which is where the phone layout had
+            // already put it to save exactly this line.
+            const read = handById.get(c.id);
+            if (read) {
+                const ranked = document.createElement("span");
+                ranked.className = "potWizardChoiceHand";
+                ranked.textContent = HandRank.describe(read);
+                text.appendChild(ranked);
+            }
+            label.appendChild(text);
+
             const upTo = document.createElement("span");
             upTo.className = "potWizardChoiceUpTo";
             upTo.textContent = `up to ${Money.format(c.remaining)}`;
-            text.appendChild(upTo);
-            label.appendChild(text);
+            label.appendChild(upTo);
 
             // Cards sit apart from the name rather than inside it, so a dealer reading
             // a row across the table sees the hand, not a sentence.
@@ -182,7 +250,11 @@ const PotWizard = {
 
         const confirmBtn = document.createElement("button");
         confirmBtn.className = "holdemBtn holdemBtnAccent";
-        confirmBtn.textContent = "Confirm Winner(s)";
+        confirmBtn.textContent = decided
+            ? (showdown.winners.length === 1
+                ? `Pay ${this.nameById.get(showdown.winners[0])}`
+                : "Split the pot")
+            : "Confirm Winner(s)";
         confirmBtn.addEventListener("click", () => {
             const selected = Array.from(choices.querySelectorAll("input:checked")).map(i => i.value);
             if (selected.length === 0) return;
@@ -191,9 +263,91 @@ const PotWizard = {
             this.entries = result.updatedEntries;
             this.renderStep();
         });
-        round.appendChild(confirmBtn);
-
         body.appendChild(round);
+        footer.appendChild(confirmBtn);
+    },
+
+    // How the tool reads the hands still in for this round of the pot.
+    //
+    // Asked per round rather than once for the whole hand, because a side pot has its
+    // own contenders: the player who won the main pot is out of the question for the
+    // next one, and the best hand among who is left is a different answer.
+    //
+    // Only when the dealer asked to track the board — everything here is off by default
+    // and the wizard behaves exactly as it always has.
+    readShowdown(contenders) {
+        if (!this.state.trackBoard || typeof HandRank === "undefined") return null;
+        return HandRank.showdown(this.state.board, contenders.map(c => ({
+            id: c.id,
+            cards: this.cardsById.get(c.id) || [],
+        })));
+    },
+
+    // What the winners would actually be paid if this round were confirmed now.
+    //
+    // Worked out from the same function that does the paying rather than from a second
+    // one that agrees with it today — a preview that can drift from the payout is worse
+    // than no preview, because it is the number the dealer says out loud.
+    previewPayout(winnerIds) {
+        try {
+            const result = PotCalculator.resolveRound(this.entries, this.orderFromButton(winnerIds));
+            return result.perWinner || [];
+        } catch {
+            return [];
+        }
+    },
+
+    // "Alexandra wins $25 with a full house, kings full of threes."
+    //
+    // The whole point of the feature, in one line: who won and how much. It goes above
+    // the list rather than replacing it, because the dealer still confirms — the tool
+    // reads the cards, a person still says the pot is good.
+    renderVerdict(showdown, contenders) {
+        if (!showdown) return null;
+
+        const line = document.createElement("p");
+        line.className = "potWizardVerdict";
+
+        if (!showdown.boardComplete) {
+            line.classList.add("potWizardVerdictUnsure");
+            line.textContent = "The board isn't all five cards yet, so pick the winner yourself — or fill it in on the felt and this will read it.";
+            return line;
+        }
+        if (showdown.duplicated) {
+            line.classList.add("potWizardVerdictUnsure");
+            line.textContent = "The same card is in two places, so this can't be read. Check the cards on the felt.";
+            return line;
+        }
+        if (!showdown.complete) {
+            const missing = showdown.unknown.map(id => this.nameById.get(id)).filter(Boolean);
+            line.classList.add("potWizardVerdictUnsure");
+            line.textContent = missing.length
+                ? `${this.listOf(missing)} ${missing.length === 1 ? "hasn't" : "haven't"} turned over, so who won is still yours to say.`
+                : "Not enough cards to read this one.";
+            return line;
+        }
+
+        const paid = this.previewPayout(showdown.winners);
+        const amount = paid.length ? Money.format(paid[0].amount) : "";
+        const names = showdown.winners.map(id => this.nameById.get(id)).filter(Boolean);
+        const hand = showdown.players.find(p => p.id === showdown.winners[0]);
+        const described = HandRank.phrase(hand && hand.hand);
+
+        line.classList.add("potWizardVerdictSure");
+        line.textContent = names.length === 1
+            ? `${names[0]} wins ${amount} with ${described}.`
+            : `${this.listOf(names)} split it, ${amount} each, with ${described}.`;
+        return line;
+    },
+
+    listOf(names) {
+        if (names.length <= 1) return names[0] || "";
+        return `${names.slice(0, -1).join(", ")} and ${names[names.length - 1]}`;
+    },
+
+    // The row of buttons that never scrolls away.
+    footer() {
+        return document.getElementById("potWizardFooter");
     },
 
     recordRound(result) {
@@ -232,6 +386,24 @@ const PotWizard = {
         return wrap;
     },
 
+    // What the house takes out of this pot, and what is left to push.
+    //
+    // Worked out here rather than at the end so the dealer sees it before anything
+    // moves: the summary is the last chance to disagree with the arithmetic, and a
+    // rake that only appeared in the hand log afterwards would be the tool taking
+    // money quietly.
+    rakeSplit() {
+        const gross = Array.from(this.totals.entries()).map(([id, amount]) => ({
+            id,
+            label: this.playerLabelById.get(id),
+            amount,
+        }));
+        const pot = gross.reduce((sum, p) => sum + p.amount, 0);
+        const sawFlop = (this.state.street || "preflop") !== "preflop";
+        const rake = HoldemState.rakeOn(this.state, pot, sawFlop);
+        return { pot, sawFlop, ...HoldemState.applyRake(gross, rake) };
+    },
+
     renderSummary() {
         const wrap = document.createElement("div");
         wrap.className = "potWizardSummary";
@@ -240,6 +412,20 @@ const PotWizard = {
         heading.textContent = "Final Payouts";
         wrap.appendChild(heading);
 
+        const split = this.rakeSplit();
+        const rakeSet = Number((this.state.rake || {}).percent) > 0;
+        if (rakeSet && this.totals.size > 0) {
+            const line = document.createElement("p");
+            line.className = "potWizardRake";
+            const cap = Number(this.state.rake.cap) > 0 ? `, capped at ${Money.format(this.state.rake.cap)}` : "";
+            line.textContent = split.rake > 0
+                ? `House takes ${Money.format(split.rake)} of ${Money.format(split.pot)} — ${this.state.rake.percent}%${cap}.`
+                : split.sawFlop
+                    ? `No rake on this one — ${this.state.rake.percent}% of ${Money.format(split.pot)} doesn't make a chip the table has.`
+                    : "No flop, no drop — nothing taken from a pot that ended before the flop.";
+            wrap.appendChild(line);
+        }
+
         if (this.totals.size === 0) {
             const empty = document.createElement("p");
             empty.className = "fieldHint";
@@ -248,7 +434,7 @@ const PotWizard = {
         } else {
             const legend = (this.state && this.state.chipLegend) || [];
             const list = document.createElement("ul");
-            for (const [id, amount] of this.totals.entries()) {
+            for (const { id, amount } of split.payouts) {
                 const li = document.createElement("li");
                 li.textContent = `${this.playerLabelById.get(id)} — ${Money.format(amount)}`;
 
@@ -275,13 +461,12 @@ const PotWizard = {
         applyBtn.className = "holdemBtn holdemBtnAccent";
         applyBtn.textContent = "Start Next Hand";
         applyBtn.addEventListener("click", () => {
-            const payouts = Array.from(this.totals.entries()).map(([id, amount]) => ({
-                id,
-                label: this.playerLabelById.get(id),
-                amount,
-            }));
+            // Recomputed rather than reused from the render: the same numbers, but
+            // taken at the moment the dealer commits rather than when they last
+            // looked at the screen.
+            const paid = this.rakeSplit();
             this.close();
-            this.onFinished(payouts);
+            this.onFinished(paid.payouts, { rake: paid.rake, pot: paid.pot });
         });
         actions.appendChild(applyBtn);
 
@@ -300,12 +485,10 @@ const PotWizard = {
             const note = document.createElement("p");
             note.className = "fieldHint potWizardPendingNote";
             note.textContent = "Nothing has been paid out yet. Start Next Hand pushes the pot and logs the hand.";
-            wrap.appendChild(actions);
             wrap.appendChild(note);
-            return wrap;
         }
 
-        wrap.appendChild(actions);
+        this.footer().appendChild(actions);
         return wrap;
     },
 };

JoshHeaps.Net/wwwroot/js/casino/holdem/seatMenu.js

@@ -47,6 +47,27 @@ const SeatMenu = {
             run: () => this.hooks.toggleDealtIn(index),
         });
 
+        // An empty chair with people waiting: the dealer taps the chair somebody is
+        // about to sit in, which is what their hand is doing anyway. Only the front of
+        // the queue is offered, for the same reason the panel only offers them — a list
+        // that isn't kept in order is just a pile of names.
+        const waiting = (this.state.waitingList || [])[0];
+        const emptyChair = !HoldemState.seatInPlay(player);
+        if (waiting && emptyChair) {
+            actions.push({
+                label: `Seat ${waiting.name}`,
+                className: "menuAccent",
+                run: () => this.hooks.seatWaiting(waiting.id, index),
+            });
+        }
+
+        // Leaving for the night, which is a different thing from sitting out a hand:
+        // the chips go back over the rail and the chair opens. Offered only for a seat
+        // that has somebody in it, since an empty chair has nobody to pay.
+        if (HoldemState.seatInPlay(player)) {
+            actions.push({ label: "Cash out…", run: () => this.hooks.cashOut(index) });
+        }
+
         if (!this.state.dedicatedDealer && index !== this.state.dealerSeatIndex) {
             actions.push({ label: "Give the button", run: () => this.hooks.makeDealer(index) });
         }

JoshHeaps.Net/wwwroot/js/casino/holdem/state.js

@@ -58,6 +58,19 @@ const HoldemState = {
             bigBlind: 2,
             defaultStack: null,
             street: "preflop",
+            // The community cards, in the order they hit the felt: three, then one,
+            // then one. Empty strings for the ones that haven't been turned yet, the
+            // same way a seat's two hole cards are stored.
+            board: ["", "", "", "", ""],
+            // Whether the dealer wants to be asked for them at all. Off is the tool as
+            // it has always been: no board on the felt, and the pot wizard asks who
+            // won. On, it reads the showdown and answers that question itself.
+            trackBoard: false,
+            // Whether to stop the screen sleeping while a hand is live. On, because a
+            // dealer who has to wake their phone between the flop and the turn is the
+            // single most common way this tool gets in the way of the game it is meant
+            // to be running. Only ever held while betting is open — see wakeLock.js.
+            keepScreenAwake: true,
             currentBet: 0,
             lastRaiseSize: 0,
             actingSeatIndex: null,
@@ -104,6 +117,21 @@ const HoldemState = {
             // announced hand by hand, so this is cleared with every other one-deal
             // decision rather than standing until somebody turns it off.
             straddleCount: 0,
+            // What the house takes, if it takes anything. Percent zero is a game that
+            // doesn't rake, which is nearly all of them and the default.
+            rake: { percent: 0, cap: null, noFlopNoDrop: true },
+            // What it has taken so far tonight. A session total, not a per-hand one:
+            // it is the number the box is checked against at the end.
+            rakeTaken: 0,
+            // People who have taken their chips and gone. Kept for the night rather
+            // than forgotten with the seat: the box took their cash and paid it back
+            // out, and both halves have to stay on the record or the bank check reads
+            // as a shortfall for the rest of the evening.
+            cashedOut: [],
+            // People standing behind the chairs. A dealer at a full table keeps this
+            // list on a napkin; keeping it here means the tool can offer the next seat
+            // that opens to whoever has been waiting longest.
+            waitingList: [],
             // Which seats actually put a straddle out when the hand was dealt, so the
             // felt can badge them. Read off the deal rather than worked out again
             // later, the same way the posted blinds are.
@@ -201,6 +229,17 @@ const HoldemState = {
             // A table saved before the dead button existed has neither flag. False is
             // the right guess for both: it means the rotation carries on the ordinary
             // way, which is what that table was already doing.
+            // A table saved before the board existed has no board and was not tracking
+            // one. Off is also the right guess for a dealer who never asked for it.
+            parsed.trackBoard = parsed.trackBoard === true;
+            parsed.board = this.normaliseBoard(parsed.board);
+
+            // Note the direction: `!== false` rather than `=== true`. A table saved
+            // before this setting existed has no opinion about it, and the useful guess
+            // for a dealer who has never been asked is the helpful one. Only somebody
+            // who has actually turned it off gets it off.
+            parsed.keepScreenAwake = parsed.keepScreenAwake !== false;
+
             parsed.deadButton = parsed.deadButton === true;
             parsed.deadSmallBlind = parsed.deadSmallBlind === true;
             // An old save has no record of who was dealt last hand. Empty is the
@@ -213,6 +252,36 @@ const HoldemState = {
             // whatever is in front of those players is already in their committed
             // chips, and nothing is owed on top of it.
             if (!(Number(parsed.straddleCount) > 0)) parsed.straddleCount = 0;
+            // A table saved before the house took anything takes nothing, which is
+            // also the right answer for one that never will.
+            const rake = parsed.rake && typeof parsed.rake === "object" ? parsed.rake : {};
+            parsed.rake = {
+                percent: Math.min(100, Math.max(0, Number(rake.percent) || 0)),
+                cap: Number(rake.cap) > 0 ? Money.round(Number(rake.cap)) : null,
+                noFlopNoDrop: rake.noFlopNoDrop !== false,
+            };
+            parsed.rakeTaken = Math.max(0, Money.round(Number(parsed.rakeTaken) || 0));
+            parsed.waitingList = Array.isArray(parsed.waitingList)
+                ? parsed.waitingList
+                    .map(row => (typeof row === "string" ? { id: null, name: row } : row))
+                    .filter(row => row && String(row.name || "").trim())
+                    .map(row => ({
+                        id: row.id || this.makeId("waiting"),
+                        name: String(row.name).trim().slice(0, 24),
+                        addedAt: Number(row.addedAt) || 0,
+                    }))
+                : [];
+            parsed.cashedOut = Array.isArray(parsed.cashedOut)
+                ? parsed.cashedOut
+                    .filter(row => row && row.id)
+                    .map(row => ({
+                        id: row.id,
+                        name: String(row.name || "").slice(0, 40),
+                        buyIns: Math.max(0, Money.round(Number(row.buyIns) || 0)),
+                        chips: Math.max(0, Money.round(Number(row.chips) || 0)),
+                        at: Number(row.at) || 0,
+                    }))
+                : [];
             if (!Array.isArray(parsed.postedStraddles)) parsed.postedStraddles = [];
 
             // A table saved before dealing and betting were separate has no flag, and
@@ -260,6 +329,48 @@ const HoldemState = {
     //
     // So the table can be written out as a file and read back in. Same shape that goes
     // into storage, wrapped in enough to recognise it later.
+    // ---- Asking the browser to actually keep it -------------------------------
+    //
+    // "The night lives in this browser and nowhere else" is truer than it sounds.
+    // localStorage is *evictable*: when a device runs short, the browser clears
+    // site data to make room, and it starts with the sites it thinks nobody cares
+    // about. Safari goes further and deletes script-created storage after seven days
+    // without a visit — so a table saved at last month's game can simply not be there
+    // at this one, with nothing having gone wrong and nobody having deleted anything.
+    //
+    // `persist()` is the way to say this data is not that. Granted, the storage can
+    // only be cleared by the person whose browser it is. Chromium and Safari decide
+    // silently on how much the site has been used and whether it's installed; Firefox
+    // asks. All three want the request to come from something the dealer did, which is
+    // why this fires on the first hand dealt rather than on page load.
+    supportsDurableStorage() {
+        return typeof navigator !== "undefined"
+            && !!navigator.storage
+            && typeof navigator.storage.persist === "function";
+    },
+
+    async isDurable() {
+        if (!this.supportsDurableStorage()) return false;
+        try {
+            return await navigator.storage.persisted();
+        } catch {
+            return false;
+        }
+    },
+
+    // Returns whether the browser said yes. A no is not a failure worth reporting at a
+    // table — the tool behaves identically either way, and the only honest difference
+    // is how confident the Save & reset panel is allowed to sound.
+    async requestDurable() {
+        if (!this.supportsDurableStorage()) return false;
+        try {
+            if (await navigator.storage.persisted()) return true;
+            return await navigator.storage.persist();
+        } catch {
+            return false;
+        }
+    },
+
     BACKUP_KIND: "casino.holdem.table",
     BACKUP_VERSION: 1,
 
@@ -660,6 +771,7 @@ const HoldemState = {
         // that stayed on would take chips off somebody who never said the word.
         state.straddleCount = 0;
         state.postedStraddles = [];
+        this.clearBoard(state);
         state.seats.forEach(p => {
             p.folded = false;
             p.cards = ["", ""];
@@ -672,6 +784,21 @@ const HoldemState = {
         this.ensureButtonOnPlayer(state);
     },
 
+    // Exactly five slots of either a two-character card or an empty string, whatever
+    // arrived. A board read off a file is the one that has been somewhere this tool
+    // cannot see.
+    normaliseBoard(board) {
+        const source = Array.isArray(board) ? board : [];
+        return Array.from({ length: 5 }, (_, i) => {
+            const card = typeof source[i] === "string" ? source[i].trim().toUpperCase() : "";
+            return /^[23456789TJQKA][SHDC]$/.test(card) ? card : "";
+        });
+    },
+
+    clearBoard(state) {
+        state.board = ["", "", "", "", ""];
+    },
+
     // Appends a resolved-pot record to the running session log a dealer can point to
     // for chip-count disputes, then advances the hand counter. `payouts` is
     // [{ id, label, amount }, ...] — who got paid what out of this hand's pot(s).
@@ -679,11 +806,15 @@ const HoldemState = {
     // Must be called before startNextHand() clears the seats: the per-player `ledger`
     // it stores alongside the payouts is what session standings are summed from later,
     // and it needs this hand's contributions while they're still on the table.
-    recordHand(state, payouts) {
+    recordHand(state, payouts, rake = 0) {
         if (typeof state.handNumber !== "number") state.handNumber = 1;
         if (!Array.isArray(state.handHistory)) state.handHistory = [];
 
-        const pot = payouts.reduce((sum, p) => sum + p.amount, 0);
+        // The pot as it was, house cut included — the number the table saw in the
+        // middle. What each player took is separately recorded and is net of it, so
+        // the two together say where every chip went.
+        const taken = Money.round(Math.max(0, Number(rake) || 0));
+        const pot = Money.round(payouts.reduce((sum, p) => sum + p.amount, 0) + taken);
         const wonById = new Map(payouts.map(p => [p.id, p.amount]));
         const ledger = state.seats
             .map((player, index) => ({
@@ -698,6 +829,7 @@ const HoldemState = {
             handNumber: state.handNumber,
             timestamp: Date.now(),
             pot,
+            rake: taken,
             payouts,
             ledger,
         });
@@ -733,6 +865,15 @@ const HoldemState = {
         // Cash bought in and chips currently in front don't come from the hand log at
         // all, so they're read off the seat rather than summed — a rebuy isn't a hand.
         const seatById = new Map(state.seats.map(p => [p.id, p]));
+        // And for anyone who has gone home, off the record their cash-out left behind.
+        // Without this they read as a player who bought in for nothing and is holding
+        // nothing, in the very list the dealer settles the night from.
+        const goneById = new Map((state.cashedOut || []).map(row => [row.id, row]));
+
+        goneById.forEach((row, id) => {
+            if (totals.has(id)) return;
+            totals.set(id, { id, name: row.name, in: 0, won: 0 });
+        });
 
         // Anyone who has money in the game belongs in the settle-up, whether or not
         // they've been in a logged hand yet. Building the list from the hand log alone
@@ -744,7 +885,7 @@ const HoldemState = {
             if (totals.has(player.id)) return;
             const hasMoneyInPlay =
                 (Number(player.buyIns) || 0) > 0 ||
-                (Number(player.stack) || 0) > 0 ||
+                this.chipsHeldBy(state, player) > 0 ||
                 (Number(player.amountOverride) || 0) > 0 ||
                 (Number(player.committed) || 0) > 0;
             if (!hasMoneyInPlay) return;
@@ -754,8 +895,16 @@ const HoldemState = {
         return Array.from(totals.values())
             .map(t => {
                 const seat = seatById.get(t.id);
-                const boughtIn = seat ? Money.round(Number(seat.buyIns) || 0) : 0;
-                const chipsNow = seat ? Money.round(Number(seat.stack) || 0) : 0;
+                const gone = goneById.get(t.id);
+                const boughtIn = seat
+                    ? Money.round(Number(seat.buyIns) || 0)
+                    : (gone ? gone.buyIns : 0);
+                // What a departed player is "holding" is what the box handed them on
+                // the way out. It is no longer on the table, so it is marked as paid
+                // rather than counted again at the end of the night.
+                const chipsNow = seat
+                    ? this.chipsHeldBy(state, seat)
+                    : (gone ? gone.chips : 0);
                 // Chips already pushed into the hand in progress are still this
                 // player's money until it's won. Leaving them out makes the cash
                 // position disagree with the hand log for as long as a hand is open —
@@ -786,6 +935,10 @@ const HoldemState = {
                     // a $340 stack read as "$140" at the exact moment cash changed
                     // hands.
                     chipsInFront: Money.round(chipsNow + inFrontOfThem),
+                    // Set once they have taken their chips and left, so the panel and
+                    // the export can say so rather than showing a player still sitting
+                    // there with a stack.
+                    cashedOut: !!gone && !seat,
                     cashPosition: Money.round(chipsNow + inFrontOfThem - boughtIn),
                     notes,
                 };
@@ -818,12 +971,351 @@ const HoldemState = {
     //
     // Chips in play counts everything a player could hand back: what's in front of
     // them and what's in the middle waiting to be won.
+    // ---- The people standing behind the chairs ----
+    //
+    // A full home game always has a couple of them, and the list lives on a napkin or
+    // in the dealer's head — which is where the argument comes from an hour later about
+    // who said they were next. Kept in order of arrival, because that is the only
+    // ordering anybody has ever agreed to.
+
+    addToWaitingList(state, name) {
+        const trimmed = String(name || "").trim().slice(0, 24);
+        if (!trimmed) return null;
+        if (!Array.isArray(state.waitingList)) state.waitingList = [];
+        const entry = { id: this.makeId("waiting"), name: trimmed, addedAt: Date.now() };
+        state.waitingList.push(entry);
+        return entry;
+    },
+
+    removeFromWaitingList(state, id) {
+        if (!Array.isArray(state.waitingList)) return null;
+        const index = state.waitingList.findIndex(row => row.id === id);
+        if (index < 0) return null;
+        return state.waitingList.splice(index, 1)[0];
+    },
+
+    // Chairs with nobody in them, in seat order. What "a seat has opened" means, and
+    // the same question the deal prompt answers when it counts the players.
+    openSeats(state) {
+        return state.seats
+            .map((player, index) => ({ player, index }))
+            .filter(({ player }) => !this.seatInPlay(player))
+            .map(({ index }) => index);
+    },
+
+    // Sit the next person down. Their name goes on the chair and nothing else does:
+    // they haven't bought in yet, and guessing a stack for them would put chips on the
+    // table that nobody has paid for — which is the one thing the bank check exists to
+    // catch.
+    seatFromWaitingList(state, id, index) {
+        const seat = state.seats[index];
+        if (!seat) return { ok: false, reason: "There's no such seat." };
+        if (this.seatInPlay(seat)) {
+            return { ok: false, reason: `${this.displayName(seat, index)} is already in that seat.` };
+        }
+        const entry = this.removeFromWaitingList(state, id);
+        if (!entry) return { ok: false, reason: "They aren't on the list any more." };
+
+        seat.name = entry.name;
+        // Not dealt in and holding nothing: the next thing that happens is the dealer
+        // taking their money, and Add chips is what says so.
+        seat.inHand = false;
+        return { ok: true, name: entry.name, index };
+    },
+
+    // ---- Somebody leaving with their chips ----
+    //
+    // The most ordinary thing that happens at a home game after midnight, and the tool
+    // had nothing for it. A dealer's only way to free the chair was to wipe the seat by
+    // hand, and then the bank check — which adds up cash taken against chips on the
+    // table — declared the departing player's whole stack missing: "someone has paid
+    // for chips they haven't been given", for the rest of the night. Wiping their
+    // buy-in as well silenced it, at the price of losing their night from the standings
+    // and the file the dealer hands over.
+    //
+    // Cashing out is two facts, and both have to survive the empty chair: the box took
+    // their cash, and the box paid their chips back out.
+
+    // Can this seat be cashed out right now?
+    canCashOut(state, index) {
+        const player = state.seats[index];
+        if (!player) return { ok: false, reason: "There's nobody in that seat." };
+        const inPot = Money.round((Number(player.committed) || 0) + (Number(player.amountOverride) || 0));
+        if (inPot > 0) {
+            return {
+                ok: false,
+                // Paying someone out with money still in the middle would either take
+                // chips out of a pot other people can win, or hand them chips twice.
+                reason: `${this.displayName(player, index)} has ${Money.format(inPot)} in the pot. Finish the hand first.`,
+            };
+        }
+        return { ok: true };
+    },
+
+    // What the dealer counts out, and what the seat's night comes to.
+    cashOutPreview(state, index) {
+        const player = state.seats[index];
+        if (!player) return null;
+        // Betting owns the answer to "what is this seat holding" — including the rule
+        // that a seat which has never been given a stack is holding the table's
+        // starting one. Asking it rather than working it out again here: the first
+        // draft of this did, read `Number(null)` as a perfectly good zero, and offered
+        // to pay a player nothing.
+        const chips = Money.round(Math.max(0, Betting.stackOf(state, player)));
+        const boughtIn = Money.round(Math.max(0, Number(player.buyIns) || 0));
+        return {
+            index,
+            name: this.displayName(player, index),
+            chips,
+            boughtIn,
+            // Their result for the night, in the direction a banker says it: positive
+            // means the box is paying out more than it took from them.
+            net: Money.round(chips - boughtIn),
+            breakdown: Money.formatChipBreakdown(chips, state.chipLegend),
+        };
+    },
+
+    // Hand them their chips and free the chair, keeping both halves on the record.
+    cashOut(state, index) {
+        const allowed = this.canCashOut(state, index);
+        if (!allowed.ok) return allowed;
+
+        const preview = this.cashOutPreview(state, index);
+        const leavingId = state.seats[index].id;
+        if (!Array.isArray(state.cashedOut)) state.cashedOut = [];
+        state.cashedOut.push({
+            id: leavingId,
+            name: preview.name,
+            buyIns: preview.boughtIn,
+            chips: preview.chips,
+            at: Date.now(),
+        });
+
+        // The chair opens for the next player. A fresh id, because the person who had
+        // it has gone and their night is now filed under the old one — reusing it would
+        // merge two people's results the moment somebody new sits down.
+        const seat = this.makePlayer();
+        state.seats[index] = seat;
+        // Anyone owed a hand by this seat is no longer owed one.
+        state.postingIn = (state.postingIn || []).filter(id => id !== leavingId);
+        return { ok: true, ...preview };
+    },
+
+    // ---- The house's cut ----
+    //
+    // A game that takes a rake or a time charge has chips leaving the table every hand,
+    // and until now the bank check called them missing: it added up the buy-ins,
+    // added up the chips on the felt, and told the dealer somebody had been paid for
+    // chips they never got. The house's cut is the one thing on this table that is
+    // supposed to go and not come back, so it is counted rather than mourned.
+    //
+    // Percentage with a cap, which is what nearly every room and home game runs. Zero
+    // percent is a game that doesn't rake, which is the default and the common case.
+
+    // What the house takes from a pot of this size.
+    //
+    // "No flop, no drop" is the rule almost everyone plays: a hand that ends before the
+    // flop pays nothing, because the players never got a hand out of it. It is on by
+    // default and can be turned off for a house that rakes every pot.
+    rakeOn(state, pot, sawFlop = true) {
+        const rake = state.rake || {};
+        const percent = Number(rake.percent) || 0;
+        const amount = Money.round(Number(pot) || 0);
+        if (percent <= 0 || amount <= 0) return 0;
+        if (rake.noFlopNoDrop !== false && !sawFlop) return 0;
+
+        const uncapped = (amount * percent) / 100;
+        const cap = Number(rake.cap);
+        const capped = cap > 0 ? Math.min(uncapped, cap) : uncapped;
+        // Never more than the pot, however the numbers were typed in.
+        return Money.downToChip(Math.min(capped, amount), state.chipLegend);
+    },
+
+    // The same payouts with the house's cut taken out of them.
+    //
+    // Off the top of the whole pot, then shared out in proportion — which for the hand
+    // a dealer actually deals, with one winner, is just "winner gets the pot less the
+    // rake". Split pots take it proportionally, and whatever the rounding leaves over
+    // goes back to the winners in turn rather than to the house: the house asked for a
+    // number, and it gets that number, not that number plus dust.
+    applyRake(payouts, rake) {
+        const total = payouts.reduce((sum, p) => sum + p.amount, 0);
+        const taken = Money.round(Math.min(Math.max(0, rake), total));
+        if (taken <= 0) return { payouts: payouts.map(p => ({ ...p })), rake: 0 };
+
+        const kept = Money.toCents(total) - Money.toCents(taken);
+        const shares = payouts.map(p => {
+            const exact = (Money.toCents(p.amount) * kept) / Money.toCents(total);
+            return { payout: p, cents: Math.floor(exact) };
+        });
+
+        // Floor everybody, then hand the leftover cents out one at a time, biggest
+        // share first — the same shape as the odd-chip rule the split calculator uses.
+        let spare = kept - shares.reduce((sum, s) => sum + s.cents, 0);
+        [...shares]
+            .sort((a, b) => b.payout.amount - a.payout.amount)
+            .forEach(share => { if (spare > 0) { share.cents += 1; spare -= 1; } });
+
+        return {
+            payouts: shares.map(share => ({ ...share.payout, amount: Money.fromCents(share.cents) })),
+            rake: taken,
+        };
+    },
+
+    // Is anybody actually in this chair? A seat with a name on it, chips in front of
+    // it, cash against it or a hand dealt to it. Empty chairs are not players, which
+    // matters the moment the table's starting stack starts standing in for a seat that
+    // has never been given one — every empty chair would otherwise look like somebody
+    // holding two hundred dollars.
+    seatInPlay(player) {
+        if (!player) return false;
+        return !!(player.name || "").trim() ||
+            (Number(player.buyIns) || 0) > 0 ||
+            (Number(player.stack) || 0) > 0 ||
+            (Number(player.committed) || 0) > 0 ||
+            (Number(player.amountOverride) || 0) > 0 ||
+            player.inHand === true;
+    },
+
+    // What a seat is holding, the way the felt and the betting see it — which includes
+    // the table's starting stack standing in for a seat that has never been given one.
+    //
+    // This is the number the money side of the tool was missing. "Starting stack" is
+    // offered in the setup panel as the ordinary way to open a table, and everything a
+    // dealer looks at — the puck, the bar, what a player can bet — reads it. The bank
+    // check and the standings read `seat.stack` directly instead, which is null for
+    // exactly those seats: measured on a three-handed table with a $200 starting stack
+    // and nobody's own stack set, the felt played for $600 while the bank check said
+    // "no chips in play, balanced" and the standings listed nobody at all.
+    chipsHeldBy(state, player) {
+        if (!this.seatInPlay(player)) return 0;
+        return Math.max(0, Money.round(Betting.stackOf(state, player)));
+    },
+
+    // What a chip colour is holding up.
+    //
+    // Removing one is not a change to a legend. computeContribution() prices a seat by
+    // running the legend over that seat's chip counts, so a colour that leaves the
+    // legend takes every chip counted in it off the table. Measured on a three-handed
+    // table counting real chips: deleting the $500 row took $22,500 of $26,874 with it,
+    // on one click of a 24px button, with nothing said and nothing shown.
+    //
+    // It does not come back, either. A colour added again is a new colour with a new
+    // id, while the counts stay keyed to the one that left — so "put it back" restores
+    // the row and none of the money.
+    //
+    // Hence this: the cost is answerable before the click rather than discovered at the
+    // end of the night, when the box is short and nobody knows why.
+    // The number here is the *difference*, asked by pricing every seat twice — once with
+    // the colour and once without — rather than by multiplying the chips by their value.
+    //
+    // Those two are not the same, and the multiplication is the wrong one, because
+    // computeContribution() does not always reach the chips. A seat with a typed amount
+    // is priced from that and its chip counts are ignored, so a colour it holds is worth
+    // nothing to it; and a seat whose chips all leave falls through to the table's base
+    // pot — the standing ante — rather than to zero, so it loses less than its chips
+    // were worth.
+    // Both would put a number in the confirmation that the table then failed to match,
+    // which is worse than no number at all — this is a warning whose whole job is to be
+    // the truth.
+    chipColorUsage(state, chipId) {
+        const chip = (state.chipLegend || []).find(entry => entry.id === chipId);
+        if (!chip) return { chip: null, total: 0, chips: 0, seats: [] };
+
+        const legend = state.chipLegend || [];
+        const without = legend.filter(entry => entry.id !== chipId);
+
+        const seats = state.seats
+            .map((player, index) => {
+                const before = this.computeContribution(player, legend, state.basePotAmount);
+                const after = this.computeContribution(player, without, state.basePotAmount);
+                return {
+                    index,
+                    name: this.displayName(player, index),
+                    count: Number((player.chipCounts || {})[chipId]) || 0,
+                    amount: Money.round(before - after),
+                };
+            })
+            // Signed, and not filtered to losses, because removing a colour can put the
+            // table *up*. A seat whose chips are worth less than the table's standing
+            // ante falls through to the ante once they are gone: found by the randomised
+            // check at 14 chips of a $1 colour against a $200 base pot, where deleting it
+            // moved the table by +186. Rare, but a warning that said "nothing changes"
+            // there would be as wrong as one that named the wrong number.
+            .filter(row => row.amount !== 0);
+
+        return {
+            chip,
+            seats,
+            chips: seats.reduce((sum, row) => sum + row.count, 0),
+            total: Money.round(seats.reduce((sum, row) => sum + row.amount, 0)),
+        };
+    },
+
+    // Take a colour out, and take its counts with it.
+    //
+    // Leaving them behind is what the old code did — the seats kept counts against an
+    // id no legend entry answers to any more, so the file carried money that nothing
+    // could price and nothing could show. Clearing them makes the saved table say what
+    // the screen says. The usage is measured before anything moves, so a caller can
+    // report what it cost.
+    removeChipColor(state, chipId) {
+        const usage = this.chipColorUsage(state, chipId);
+        if (!usage.chip) return usage;
+
+        state.chipLegend = (state.chipLegend || []).filter(entry => entry.id !== chipId);
+        state.seats.forEach(player => {
+            if (player.chipCounts && chipId in player.chipCounts) delete player.chipCounts[chipId];
+        });
+        return usage;
+    },
+
+    // Seats playing with chips the box has no cash against.
+    //
+    // Two kinds, and they are not the same problem. A seat holding the table's starting
+    // stack has never been given chips of its own — the dealer set "everyone starts
+    // with 200" and sat people down, which is the ordinary way to open a table and the
+    // reason this whole gap existed. A seat with its own stack and no buy-in is a
+    // rebuy somebody forgot to write down, and only the dealer knows what it was.
+    seatsOwingCash(state) {
+        return state.seats
+            .map((player, index) => ({ player, index }))
+            .filter(({ player }) => this.chipsHeldBy(state, player) > 0 &&
+                !((Number(player.buyIns) || 0) > 0))
+            .map(({ player, index }) => ({
+                index,
+                name: this.displayName(player, index),
+                chips: this.chipsHeldBy(state, player),
+                // True when they are holding the table's starting stack rather than one
+                // the dealer typed for them.
+                fromStartingStack: player.stack === null || player.stack === undefined ||
+                    String(player.stack).trim() === "",
+            }));
+    },
+
+    // Write down the cash for the seats that are holding the table's starting stack.
+    // Only those: what somebody else's unrecorded rebuy was is a question only the
+    // dealer can answer, and guessing it would be the tool inventing money.
+    recordStartingBuyIns(state) {
+        const owed = this.seatsOwingCash(state).filter(row => row.fromStartingStack);
+        owed.forEach(row => { state.seats[row.index].buyIns = row.chips; });
+        return {
+            seats: owed.length,
+            total: Money.round(owed.reduce((sum, row) => sum + row.chips, 0)),
+        };
+    },
+
     bankReconciliation(state) {
-        const cashIn = state.seats.reduce((sum, p) => sum + Math.max(0, Number(p.buyIns) || 0), 0);
+        const gone = Array.isArray(state.cashedOut) ? state.cashedOut : [];
+        // Cash the box took from people who have since left counts as taken: it is in
+        // the box, and forgetting it with the seat is what used to make a cash-out read
+        // as a shortfall all night.
+        const cashIn = state.seats.reduce((sum, p) => sum + Math.max(0, Number(p.buyIns) || 0), 0) +
+            gone.reduce((sum, row) => sum + Math.max(0, Number(row.buyIns) || 0), 0);
         const chipsInPlay = state.seats.reduce(
             (sum, p) =>
                 sum +
-                Math.max(0, Number(p.stack) || 0) +
+                this.chipsHeldBy(state, p) +
                 Math.max(0, Number(p.committed) || 0) +
                 Math.max(0, Number(p.amountOverride) || 0),
             0
@@ -837,11 +1329,21 @@ const HoldemState = {
         // hunting for a miscount that never happened.
         const discarded = Math.max(0, Money.round(Number(state.discarded) || 0));
 
-        const difference = Money.round(chipsInPlay + discarded - cashIn);
+        // Chips the house has taken. Off the table for good, like the discards, and
+        // for a better reason: the box is supposed to have them.
+        const raked = Math.max(0, Money.round(Number(state.rakeTaken) || 0));
+
+        // Chips handed back over the rail. Off the table like the other two, and the
+        // one the dealer can point at when somebody asks where the money went.
+        const paidOut = Money.round(gone.reduce((sum, row) => sum + Math.max(0, Number(row.chips) || 0), 0));
+
+        const difference = Money.round(chipsInPlay + discarded + raked + paidOut - cashIn);
         return {
             cashIn: Money.round(cashIn),
             chipsInPlay: Money.round(chipsInPlay),
             discarded,
+            raked,
+            paidOut,
             difference,
             // Half a cent of float dust isn't a discrepancy worth alarming anyone over.
             balanced: Math.abs(difference) <= Money.EPSILON,

JoshHeaps.Net/wwwroot/js/casino/holdem/wakeLock.js

@@ -0,0 +1,126 @@
+// Keeps the screen on while a hand is live.
+//
+// The dealer's phone spends the night face-up on the felt with nine people round it,
+// and the one thing it reliably does between the flop and the turn is dim, then lock.
+// Every hand, all night. A dozen rounds of work have gone into making the next step
+// readable at a glance, and none of it survives a black screen and a passcode with
+// four people waiting to know whether the bet is called.
+//
+// Held only while betting is actually open. A phone left on the table through a break,
+// a re-buy, or the twenty minutes where everyone is arguing about pizza sleeps exactly
+// like any other phone — which is the difference between a tool that respects a battery
+// and one a dealer stops trusting with their evening.
+
+const WakeLock = {
+    // The browser's promise to stay awake. Null whenever we aren't holding one, which
+    // includes every moment the browser has taken it back on us — see `start()`.
+    sentinel: null,
+
+    // What the last sync decided we want. Kept separate from `sentinel` because
+    // requesting one is asynchronous: a hand can be dealt and folded out inside the
+    // await, and the answer to "should we still be holding this" has to be the current
+    // one rather than the one that was true when the request went out.
+    wanted: false,
+
+    // One request at a time. `sync()` runs off renderAll, which fires many times a
+    // second during a busy street; without this, two overlapping requests both get
+    // past the "already holding one?" check and the second sentinel leaks — the screen
+    // then stays awake after the hand ends, with nothing left holding a reference to
+    // turn it off.
+    pending: false,
+
+    // Whether the dealer has been told this is happening. Once per page load, not once
+    // per hand: the same toast at the top of all forty hands of a session would be the
+    // single most annoying thing the tool does.
+    told: false,
+
+    // Set by main.js so the toast's "Turn off" can actually turn it off.
+    hooks: null,
+
+    supported() {
+        return typeof navigator !== "undefined" && "wakeLock" in navigator;
+    },
+
+    // The whole decision, with no browser in it, so it can be tested as what it is:
+    // a rule about when a poker table needs the screen.
+    shouldHold(state) {
+        if (!state) return false;
+        if (state.keepScreenAwake === false) return false;
+        return state.bettingOpen === true;
+    },
+
+    // Called after anything that could start or end a hand. Safe to call constantly.
+    sync(state) {
+        this.wanted = this.supported() && this.shouldHold(state);
+        if (this.wanted) this.acquire();
+        else this.release();
+    },
+
+    async acquire() {
+        if (this.sentinel || this.pending) return;
+        this.pending = true;
+        try {
+            const sentinel = await navigator.wakeLock.request("screen");
+            // The hand can have ended while that was in flight. Letting this one go
+            // immediately is the only correct answer; holding it "just until the next
+            // sync" is how a phone stays lit on an empty table.
+            if (!this.wanted) {
+                try { await sentinel.release(); } catch { /* already gone */ }
+                return;
+            }
+            this.sentinel = sentinel;
+            // The browser releases this itself when the tab is hidden, and tells us so.
+            // Without this listener our `sentinel` would be a stale object and the
+            // re-acquire in `start()` would decline to do anything.
+            sentinel.addEventListener("release", () => {
+                if (this.sentinel === sentinel) this.sentinel = null;
+            });
+            this.tell();
+        } catch {
+            // Battery saver, a hidden tab, a browser that simply says no. All of these
+            // are the browser doing its job, and none of them is worth an error at a
+            // poker table — the tool works exactly as it did before, the screen just
+            // dims the way the phone's own settings say it should.
+        } finally {
+            this.pending = false;
+        }
+    },
+
+    async release() {
+        const sentinel = this.sentinel;
+        this.sentinel = null;
+        if (!sentinel) return;
+        try { await sentinel.release(); } catch { /* already released */ }
+    },
+
+    // Said once, at the moment it first becomes true, with the way out attached.
+    //
+    // The alternative was a permanent indicator in the header, and the header is the
+    // one part of this page that has been fought over for crowding more than any other.
+    // A dealer needs to know their phone is behaving unusually exactly once; after that
+    // it is a setting, and settings live in the sidebar.
+    tell() {
+        if (this.told) return;
+        this.told = true;
+        if (typeof Toast === "undefined") return;
+        Toast.show("Keeping the screen on while a hand is live.", {
+            actionLabel: "Turn off",
+            onAction: () => { if (this.hooks && this.hooks.turnOff) this.hooks.turnOff(); },
+        });
+    },
+
+    // A screen wake lock is not something you take once. The browser drops it whenever
+    // the document stops being visible — switching apps to check a rule, the phone
+    // locking on its own before the first hand was dealt, a notification pulled down —
+    // and it never comes back on its own. A tool that requests it at the start of the
+    // hand and assumes it still has it is a tool that works until the first interruption.
+    start(getState) {
+        if (!this.supported()) return;
+        document.addEventListener("visibilitychange", () => {
+            if (document.visibilityState !== "visible") return;
+            this.sync(getState());
+        });
+    },
+};
+
+if (typeof module !== "undefined" && module.exports) module.exports = WakeLock;

tests/holdem/aimingTheBlinds.test.js

@@ -0,0 +1,128 @@
+// Saying who the blind is, before saying "cards".
+//
+// A dealer sets the table up out loud — button here, she's the small blind, he's the
+// big blind — and only then deals. The seat menu offers "Make small blind" for exactly
+// that, and it was answering by dealing the hand: betting opened, two stacks docked,
+// the action bar up and waiting on the seat after the big blind. The dealer had said
+// where the blinds go, and the tool heard "deal".
+//
+// The condition it was asking is `onlyBlindsIn`, which means "nothing has happened in
+// this hand except the blinds" — true of a hand one second old, and equally true of a
+// table in setup with no cards out and nothing committed. Those two need telling apart,
+// which is what `blindsArePosted` is for.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Betting, HoldemState, makeTable, chipsOnTable } = require("./load");
+
+describe("before the deal", () => {
+    test("the blinds are not down, however much the table looks ready", () => {
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3] });
+        assert.equal(state.bettingOpen, false);
+        // The old condition, on its own, says yes here — this is the whole bug.
+        assert.equal(Betting.onlyBlindsIn(state), true);
+        assert.equal(Betting.blindsArePosted(state), false);
+    });
+
+    test("a table straight out of setup, with nobody seated, is the same answer", () => {
+        assert.equal(Betting.blindsArePosted(HoldemState.createDefault()), false);
+    });
+
+    test("re-posting would have dealt the hand, which is why it is guarded", () => {
+        // Not a rule, a demonstration: repostBlinds ends in beginHand. Calling it in
+        // setup is the deal, and nothing about naming a blind should reach it.
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3] });
+        Betting.repostBlinds(state);
+        assert.equal(state.bettingOpen, true, "chips off two stacks and the action bar up");
+        assert.notEqual(state.actingSeatIndex, null);
+    });
+
+    test("naming a blind moves a badge and no chips", () => {
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3] });
+        const before = chipsOnTable(state);
+
+        // What the seat menu does: pin the override, repost only if the blinds are down.
+        state.blindOverride = { sbIndex: 3, bbIndex: 0 };
+        if (Betting.blindsArePosted(state)) Betting.repostBlinds(state);
+
+        assert.equal(state.bettingOpen, false, "still setup — the dealer hasn't dealt");
+        assert.equal(state.actingSeatIndex, null, "nobody is being asked to act");
+        assert.deepEqual(state.seats.map(p => Betting.committed(p)), [0, 0, 0, 0, 0, 0]);
+        assert.equal(chipsOnTable(state), before);
+
+        // And the badges say what the dealer just said.
+        const blinds = HoldemState.getBlindSeats(state);
+        assert.equal(blinds.sbIndex, 3);
+        assert.equal(blinds.bbIndex, 0);
+    });
+
+    test("and the hand that follows posts from where they were aimed", () => {
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], smallBlind: 1, bigBlind: 2 });
+        state.blindOverride = { sbIndex: 3, bbIndex: 0 };
+        if (Betting.blindsArePosted(state)) Betting.repostBlinds(state);
+
+        Betting.beginHand(state);
+        assert.equal(Betting.committed(state.seats[3]), 1);
+        assert.equal(Betting.committed(state.seats[0]), 2);
+    });
+
+    test("giving the button away is a marker moving too", () => {
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3] });
+        const before = chipsOnTable(state);
+
+        const willRepost = Betting.blindsArePosted(state);
+        state.dealerSeatIndex = 2;
+        if (willRepost) Betting.repostBlinds(state);
+
+        assert.equal(willRepost, false);
+        assert.equal(state.bettingOpen, false);
+        assert.equal(chipsOnTable(state), before);
+    });
+});
+
+describe("once the hand is dealt", () => {
+    test("the blinds are down, and re-aiming them moves real chips", () => {
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], dealerSeatIndex: 0 });
+        const before = chipsOnTable(state);
+        Betting.beginHand(state);
+        assert.equal(Betting.blindsArePosted(state), true);
+        assert.equal(Betting.committed(state.seats[1]), 1);
+
+        state.blindOverride = { sbIndex: 3, bbIndex: 0 };
+        if (Betting.blindsArePosted(state)) Betting.repostBlinds(state);
+
+        assert.equal(Betting.committed(state.seats[1]), 0, "the old small blind got their chip back");
+        assert.equal(Betting.committed(state.seats[3]), 1);
+        assert.equal(Betting.committed(state.seats[0]), 2);
+        assert.equal(chipsOnTable(state), before, "no chips created or lost in the shuffle");
+    });
+
+    test("but not once somebody has answered them", () => {
+        const state = makeTable({ seatCount: 4, seated: [0, 1, 2, 3], dealerSeatIndex: 0 });
+        Betting.beginHand(state);
+        Betting.call(state, state.actingSeatIndex);
+        assert.equal(Betting.blindsArePosted(state), false, "there is a call to unpick now");
+    });
+
+    test("nor on a later street", () => {
+        const state = makeTable({ seatCount: 4, seated: [0, 1, 2, 3], dealerSeatIndex: 0 });
+        Betting.beginHand(state);
+        state.street = "flop";
+        assert.equal(Betting.blindsArePosted(state), false);
+    });
+
+    test("and a misdealt hand goes back to being a table in setup", () => {
+        const state = makeTable({ seatCount: 4, seated: [0, 1, 2, 3], dealerSeatIndex: 0 });
+        Betting.beginHand(state);
+        Betting.takeHandBack(state);
+        assert.equal(Betting.blindsArePosted(state), false, "nothing is posted until the dealer deals again");
+    });
+
+    test("as does a hand that has been paid out", () => {
+        const state = makeTable({ seatCount: 4, seated: [0, 1, 2, 3], dealerSeatIndex: 0 });
+        Betting.beginHand(state);
+        Betting.sweepToHandTotals(state);
+        HoldemState.startNextHand(state);
+        assert.equal(Betting.blindsArePosted(state), false);
+    });
+});

tests/holdem/allInMarker.test.js

@@ -4,9 +4,23 @@
 // bet at, so the test that matters most is the last one: the seats it marks are
 // exactly the seats the betting round refuses to ask for another chip.
 const test = require("node:test");
+const { describe } = require("node:test");
 const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
 const { Betting, HoldemState, makeTable, chipsOnTable } = require("./load");
 
+const CSS = fs.readFileSync(
+    path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "css", "casino", "holdem.css"), "utf8");
+
+// The declarations inside one rule, by its exact selector.
+const ruleBody = selector => {
+    const at = CSS.indexOf(`\n${selector} {`);
+    if (at < 0) return null;
+    const open = CSS.indexOf("{", at);
+    return CSS.slice(open + 1, CSS.indexOf("}", open));
+};
+
 test("a player who moved all-in is marked", () => {
     const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], stack: 100 });
     state.seats[3].stack = 12;
@@ -96,3 +110,64 @@ test("marking nobody doesn't move a chip", () => {
     state.seats.forEach(player => Betting.isAllIn(state, player));
     assert.equal(chipsOnTable(state), before);
 });
+
+// ---- And the shape of the mark, which is the felt's problem ------------------
+//
+// "ALL IN" is the only thing that ever lands on the stack line with a space in it, and
+// a space is somewhere to break. Measured at 360x640 with twelve players all-in, it
+// wanted 36px and had 34: it broke onto a second line, and an 11px line became 22.
+//
+// That is not a typography complaint. The puck went from 55px tall to 66, and puck
+// height is what the seat ring is short of — at the ends of an ellipse the seats are
+// separated vertically, so 11px taller is 11px further into the seat next door. The
+// layout search then tried every width it has, found none that cleared, and fell back
+// to the narrowest, which is also the one that wraps hardest.
+//
+// So the rule every design system gives a badge applies here too: one line, always.
+describe("the mark is one line, because the ring cannot afford two", () => {
+    test("a stack line can never wrap", () => {
+        const body = ruleBody(".seatPuckStack");
+        assert.ok(body, "the .seatPuckStack rule should exist");
+        assert.match(body, /white-space:\s*nowrap/,
+            "the stack line must not be allowed to wrap — a second line is 11px the ring hasn't got");
+    });
+
+    test("and on the tightest pucks it gives up its letter-spacing to fit", () => {
+        // Not wrapping alone only converts a wrap into a spill: a line that cannot wrap
+        // and still doesn't fit paints over the seat beside it instead. The spacing is
+        // 3.6px of the 36 it wanted, and it is the one of the mark's three signals that
+        // can go — the warm colour and the bold weight stay.
+        const base = ruleBody(".seatPuckStack.seatPuckAllIn");
+        const tight = ruleBody(".seatsTight .seatPuckStack.seatPuckAllIn");
+        assert.ok(base, "the base all-in rule should exist");
+        assert.ok(tight, "the tight-tier all-in rule should exist");
+
+        const spacingOf = body => {
+            const match = body.match(/letter-spacing:\s*([\d.]+)em/);
+            return match ? Number(match[1]) : null;
+        };
+        const wide = spacingOf(base);
+        const narrow = spacingOf(tight);
+        assert.ok(wide !== null && narrow !== null, "both rules should set letter-spacing in em");
+        assert.ok(narrow < wide,
+            `the tight tier should space the mark more tightly than the ordinary one (${narrow} vs ${wide})`);
+
+        // The arithmetic that has to hold for it to fit at all: six characters at 10px
+        // with 4px of padding either side and a 1px border, inside a 44px puck.
+        const CONTENT_PX = 44 - 2 * 4 - 2 * 1;
+        const inkAt = spacing => 32.4 + spacing * 10 * "ALL IN".length;
+        assert.ok(inkAt(narrow) <= CONTENT_PX,
+            `"ALL IN" must fit the narrowest puck: ${inkAt(narrow).toFixed(1)}px into ${CONTENT_PX}px`);
+        assert.ok(inkAt(wide) > CONTENT_PX,
+            "the ordinary spacing is what didn't fit — if it does now, this test is measuring the wrong thing");
+    });
+
+    test("the two signals that survive are the ones doing the work", () => {
+        // The spacing exists so "ALL IN" doesn't read as money at a glance. Dropping it
+        // on the narrow pucks is only safe while the colour and the weight remain, so
+        // they are pinned here rather than left to be tidied away later.
+        const base = ruleBody(".seatPuckStack.seatPuckAllIn");
+        assert.match(base, /color:\s*#ffcf6b/i, "the warm colour separates it from a grey stack");
+        assert.match(base, /font-weight:\s*700/, "and the weight does the rest");
+    });
+});

tests/holdem/announcing.test.js

@@ -0,0 +1,135 @@
+// What the tool says out loud between taps.
+//
+// The action bar carried `aria-live="polite"` on the element whose entire contents
+// render() rebuilds every action, so a screen reader read the whole bar after every
+// single tap. Measured, after one:
+//
+//   "PRE-FLOP Pot $15 9 players Bob · $250 behind 0:00 ↶ dealing the hand U
+//    Fold Call $10 Raise"
+//
+// Nothing in that is wrong. It is just unusable at the speed a hand is dealt, and it
+// is the documented anti-pattern: a live region has to be a stable element whose text
+// changes, not a container that gets replaced.
+//
+// What a dealer running this by ear needs is who is on the clock and what it costs
+// them. These are the sentences.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { ActionBar, Betting, HoldemState, makeTable } = require("./load");
+
+const barOn = (state) => {
+    ActionBar.state = state;
+    ActionBar.lastAnnouncement = undefined;
+    return ActionBar;
+};
+
+describe("before the cards are out", () => {
+    test("a table that could be dealt says so", () => {
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3] });
+        assert.equal(barOn(state).announcement(), "Ready to deal.");
+    });
+
+    test("and an empty table says what it is, rather than nothing", () => {
+        // This used to announce "" — silence being the honest answer when the bar was
+        // hidden on a table nobody was sitting at. The bar isn't hidden any more: an
+        // empty table is the one state a dealer meets before they know how any of this
+        // works, so it says so and offers the next step.
+        const state = HoldemState.createDefault();
+        assert.equal(barOn(state).announcement(), "Nobody's at the table yet.");
+    });
+
+    test("and a table with one named player has moved on from that", () => {
+        const state = HoldemState.createDefault();
+        state.seats[0].name = "Ann";
+        assert.notEqual(barOn(state).announcement(), "Nobody's at the table yet.");
+    });
+});
+
+describe("while a hand is running", () => {
+    const dealt = () => {
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], smallBlind: 1, bigBlind: 2 });
+        state.seats.forEach((p, i) => { p.name = ["Ann", "Ben", "Cal", "Dee"][i] || ""; });
+        Betting.beginHand(state);
+        return state;
+    };
+
+    test("names who is on the clock, what it costs, and the pot", () => {
+        const state = dealt();
+        const said = barOn(state).announcement();
+        assert.match(said, /to act/);
+        assert.match(said, /\$2 to call/);
+        assert.match(said, /Pot \$3\./);
+    });
+
+    test("it is the seat that is actually acting, not the one after it", () => {
+        const state = dealt();
+        const name = HoldemState.displayName(state.seats[state.actingSeatIndex], state.actingSeatIndex);
+        assert.ok(barOn(state).announcement().startsWith(name + " to act"));
+    });
+
+    test("says checked to them rather than $0 to call", () => {
+        // A number nobody owes is a number a dealer has to stop and parse.
+        const state = dealt();
+        state.currentBet = 0;
+        assert.match(barOn(state).announcement(), /checked to them/);
+        assert.doesNotMatch(barOn(state).announcement(), /\$0 to call/);
+    });
+
+    test("a street with nobody left to act says the street is done", () => {
+        const state = dealt();
+        state.actingSeatIndex = null;
+        state.street = "flop";
+        assert.equal(barOn(state).announcement(), "Flop betting is done.");
+    });
+
+    test("and a finished hand points at the pot", () => {
+        const state = dealt();
+        state.seats.forEach((p, i) => { if (i !== 0) p.folded = true; });
+        assert.equal(Betting.isHandOver(state), true);
+        assert.equal(barOn(state).announcement(), "Hand over. Resolve the pot.");
+    });
+});
+
+describe("how often it speaks", () => {
+    // A live region that is handed the same sentence twice reads it out twice, and
+    // render() runs for a great many reasons that have nothing to do with whose turn
+    // it is — a resize, a panel opening, a note being typed.
+    const stubTarget = () => {
+        const el = { textContent: "" };
+        global.document = { getElementById: id => (id === "actionAnnouncer" ? el : null) };
+        return el;
+    };
+
+    test("says nothing new when nothing changed", () => {
+        const el = stubTarget();
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], smallBlind: 1, bigBlind: 2 });
+        Betting.beginHand(state);
+        const bar = barOn(state);
+
+        bar.announce();
+        const first = el.textContent;
+        assert.ok(first.length > 0);
+
+        el.textContent = "CLEARED";       // if announce() writes again, this comes back
+        bar.announce();
+        assert.equal(el.textContent, "CLEARED", "the same sentence was not written twice");
+        delete global.document;
+    });
+
+    test("but does when the action moves", () => {
+        const el = stubTarget();
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], smallBlind: 1, bigBlind: 2 });
+        Betting.beginHand(state);
+        const bar = barOn(state);
+
+        bar.announce();
+        const first = el.textContent;
+        Betting.call(state, state.actingSeatIndex);
+        bar.announce();
+
+        assert.notEqual(el.textContent, first);
+        assert.match(el.textContent, /to act/);
+        delete global.document;
+    });
+});

tests/holdem/apca.js

@@ -0,0 +1,98 @@
+// Perceptual contrast (APCA), and how much of it each piece of text needs.
+//
+// The audit already had a contrast check and it passed, which is why this exists. That
+// check measures WCAG 2 contrast ratio, and WCAG 2's own authors say it is the wrong
+// instrument for this page: the ratio is a luminance gap, and a luminance gap
+// systematically *overstates* readability once one of the two colours is near black.
+// This table's page is #141414 and its panels are darker still, so every reading it
+// takes is on the side of the algorithm where it is least reliable. Text can clear
+// 4.5:1 and still read as a smudge.
+//
+// APCA asks the other question — can text of *this size and weight* be read on this
+// background — and answers it on a scale where a given number means the same
+// readability at either polarity. It replaces nothing: the WCAG check stays, because
+// that is the number an accessibility audit will ask for. This is the one that says
+// whether a dealer can read it in a dim room.
+//
+// Constants are 0.98G-4g, and the implementation is checked against the eight
+// published reference pairs in apcaMath.test.js. An unverified contrast checker is
+// worse than none, because it launders a guess into a number.
+
+const MAIN_TRC = 2.4;
+const R_CO = 0.2126729, G_CO = 0.7151522, B_CO = 0.0721750;
+const NORM_BG = 0.56, NORM_TXT = 0.57, REV_TXT = 0.62, REV_BG = 0.65;
+const BLK_THRS = 0.022, BLK_CLMP = 1.414;
+const SCALE_BOW = 1.14, SCALE_WOB = 1.14;
+const LO_BOW_OFFSET = 0.027, LO_WOB_OFFSET = 0.027;
+const DELTA_Y_MIN = 0.0005, LO_CLIP = 0.001;
+
+// Screen luminance. Note this is a straight exponent, not the sRGB piecewise curve —
+// APCA specifies the simple 2.4 power and the two are not interchangeable here.
+function sRGBtoY(rgb) {
+    const s = c => Math.pow(c / 255.0, MAIN_TRC);
+    return R_CO * s(rgb[0]) + G_CO * s(rgb[1]) + B_CO * s(rgb[2]);
+}
+
+// Signed: positive is dark text on light, negative is light text on dark. The sign
+// carries the polarity, and polarity is not cosmetic — the same luminance pair reads
+// differently each way round, which is the whole reason this exists.
+function contrast(txtY, bgY) {
+    txtY = txtY > BLK_THRS ? txtY : txtY + Math.pow(BLK_THRS - txtY, BLK_CLMP);
+    bgY = bgY > BLK_THRS ? bgY : bgY + Math.pow(BLK_THRS - bgY, BLK_CLMP);
+
+    if (Math.abs(bgY - txtY) < DELTA_Y_MIN) return 0.0;
+
+    let sapc, out;
+    if (bgY > txtY) {
+        sapc = (Math.pow(bgY, NORM_BG) - Math.pow(txtY, NORM_TXT)) * SCALE_BOW;
+        out = sapc < LO_CLIP ? 0.0 : sapc - LO_BOW_OFFSET;
+    } else {
+        sapc = (Math.pow(bgY, REV_BG) - Math.pow(txtY, REV_TXT)) * SCALE_WOB;
+        out = sapc > -LO_CLIP ? 0.0 : sapc + LO_WOB_OFFSET;
+    }
+    return out * 100;
+}
+
+function lc(textRgb, bgRgb) {
+    return contrast(sRGBtoY(textRgb), sRGBtoY(bgRgb));
+}
+
+// How much contrast this text needs, from the published APCA levels:
+//
+//   Lc 90  fluent body text; and the floor for anything at 14px/400 or 12px/400
+//   Lc 75  the minimum for a column of body text (18px/400, 16px/500, 14px/700)
+//   Lc 60  the minimum for content text that isn't a column or block
+//   Lc 45  larger, heavier text — headlines at 36px/400 or 24px/700
+//   Lc 30  the absolute floor, and only for genuinely spot-read text
+//
+// Interpolating between those anchors rather than inventing a curve. Weight is folded
+// in as an effective size because that is how the published table behaves: bolder
+// strokes buy roughly the same readability as bigger ones, and 14px/700 sitting at the
+// same Lc 75 as 18px/400 is the anchor that fixes the exchange rate.
+function requiredLc(px, weight = 400) {
+    const heavier = Math.max(0, (Number(weight) || 400) - 400) / 300; // 400..700 -> 0..1
+    const effective = px * (1 + 0.28 * heavier);                     // 14px/700 ~= 18px/400
+
+    const anchors = [
+        [12, 90],
+        [14, 90],
+        [15, 82],
+        [18, 75],
+        [24, 60],
+        [36, 45],
+    ];
+    if (effective <= anchors[0][0]) return anchors[0][1];
+    const last = anchors[anchors.length - 1];
+    if (effective >= last[0]) return last[1];
+    for (let i = 1; i < anchors.length; i++) {
+        const [x0, y0] = anchors[i - 1];
+        const [x1, y1] = anchors[i];
+        if (effective <= x1) {
+            const t = (effective - x0) / (x1 - x0);
+            return y0 + t * (y1 - y0);
+        }
+    }
+    return last[1];
+}
+
+module.exports = { sRGBtoY, contrast, lc, requiredLc };

tests/holdem/apcaMath.test.js

@@ -0,0 +1,141 @@
+// The contrast arithmetic, checked against the numbers its authors publish.
+//
+// A contrast checker that is wrong is worse than not having one, because it launders a
+// guess into a number and then a stylesheet gets tuned to it. The eight pairs below are
+// the reference values published with APCA 0.98G-4g; if the implementation drifts from
+// them by so much as a rounding change, these fail and nothing downstream is believed.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { lc, contrast, sRGBtoY, requiredLc } = require("./apca");
+
+const hex = h => {
+    h = h.replace("#", "");
+    if (h.length === 3) h = h.split("").map(c => c + c).join("");
+    return [0, 2, 4].map(i => parseInt(h.slice(i, i + 2), 16));
+};
+
+describe("the published reference pairs", () => {
+    // Text first, background second, exactly as the reference table lists them.
+    const CASES = [
+        ["#888", "#fff", 63.056469930209424],
+        ["#fff", "#888", -68.54146436644962],
+        ["#000", "#aaa", 58.146262578561334],
+        ["#aaa", "#000", -56.24113336839742],
+        ["#123", "#def", 91.66830811481631],
+        ["#def", "#123", -93.06770049484275],
+        ["#123", "#444", 8.32326136957393],
+        ["#444", "#123", -7.526878460278154],
+    ];
+
+    CASES.forEach(([text, bg, expected]) => {
+        test(`${text} on ${bg} is Lc ${expected.toFixed(2)}`, () => {
+            assert.ok(Math.abs(lc(hex(text), hex(bg)) - expected) < 1e-9,
+                `got ${lc(hex(text), hex(bg))}, want ${expected}`);
+        });
+    });
+});
+
+describe("polarity", () => {
+    test("is signed, and the sign is not decoration", () => {
+        // Dark text on light is positive, light text on dark negative. The two are not
+        // mirror images — swapping them changes the magnitude as well as the sign,
+        // which is the entire reason this is used instead of a ratio.
+        const dark = lc(hex("#888"), hex("#fff"));
+        const light = lc(hex("#fff"), hex("#888"));
+        assert.ok(dark > 0 && light < 0);
+        assert.ok(Math.abs(Math.abs(dark) - Math.abs(light)) > 5,
+            "the same pair reads differently each way round");
+    });
+
+    test("a colour on itself is nothing at all", () => {
+        assert.equal(lc(hex("#2c2c2c"), hex("#2c2c2c")), 0);
+    });
+
+    test("and so is a difference too small to see", () => {
+        // Below deltaYmin the answer is zero rather than a tiny number, so a rounding
+        // artefact can never be reported as contrast.
+        assert.equal(lc([44, 44, 44], [44, 44, 45]), 0);
+    });
+});
+
+describe("luminance", () => {
+    test("is the straight 2.4 power, not the sRGB piecewise curve", () => {
+        // Worth pinning: the two are close enough to look right and different enough to
+        // move a borderline reading. Mid grey under the piecewise curve is ~0.2159.
+        assert.ok(Math.abs(sRGBtoY([128, 128, 128]) - Math.pow(128 / 255, 2.4)) < 1e-6);
+    });
+
+    test("white is as close to 1 as the published coefficients get", () => {
+        // 1.0000001, not 1. The three coefficients are given to seven places and sum to
+        // a hair over one, and that is the specification rather than a mistake to
+        // correct — the reference pairs above only come out exact with these values.
+        // Asserted loosely on purpose: tightening this to 1e-12 fails on correct code.
+        assert.ok(Math.abs(sRGBtoY([255, 255, 255]) - 1) < 1e-6);
+        assert.equal(sRGBtoY([0, 0, 0]), 0);
+    });
+
+    test("green carries most of it", () => {
+        // Not arbitrary: it's why gold on green was the worst pairing on the felt.
+        assert.ok(sRGBtoY([0, 255, 0]) > sRGBtoY([255, 0, 0]) + sRGBtoY([0, 0, 255]));
+    });
+
+    test("contrast() takes luminances, lc() takes colours", () => {
+        assert.equal(contrast(sRGBtoY(hex("#888")), sRGBtoY(hex("#fff"))), lc(hex("#888"), hex("#fff")));
+    });
+});
+
+describe("how much contrast a given piece of text needs", () => {
+    test("the published anchors land where they should", () => {
+        assert.equal(Math.round(requiredLc(12, 400)), 90);
+        assert.equal(Math.round(requiredLc(14, 400)), 90);
+        assert.equal(Math.round(requiredLc(18, 400)), 75);
+        assert.equal(Math.round(requiredLc(24, 400)), 60);
+        assert.equal(Math.round(requiredLc(36, 400)), 45);
+    });
+
+    test("smaller text asks for more, never less", () => {
+        for (let px = 9; px < 40; px++) {
+            assert.ok(requiredLc(px, 400) >= requiredLc(px + 1, 400),
+                `${px}px should ask for at least as much as ${px + 1}px`);
+        }
+    });
+
+    test("weight buys size, at the rate the published table sets", () => {
+        // 14px/700 and 18px/400 sit at the same Lc 75 in the table, and that pair is
+        // what fixes the exchange rate between weight and size here.
+        assert.ok(Math.abs(requiredLc(14, 700) - requiredLc(18, 400)) < 3);
+        assert.ok(requiredLc(14, 700) < requiredLc(14, 400), "bold asks for less than regular");
+    });
+
+    test("it never runs off either end", () => {
+        assert.equal(requiredLc(4, 400), 90);
+        assert.equal(requiredLc(200, 900), 45);
+    });
+});
+
+describe("what the page's own colours measure", () => {
+    // These are the readings the round was built on. Pinned so that a future change to
+    // the tokens has to look at them rather than move them by accident.
+    const PANEL = hex("#1a1a1a");
+
+    test("the greys these tokens replaced were below the floor", () => {
+        assert.ok(Math.abs(lc(hex("#9a9a9a"), PANEL)) < 50, "the old muted grey");
+        assert.ok(Math.abs(lc(hex("#8a8a8a"), PANEL)) < 40, "the old dim grey");
+    });
+
+    test("and the ones that replaced them clear it", () => {
+        assert.ok(Math.abs(lc(hex("#c8c8c8"), PANEL)) >= 60, "muted");
+        assert.ok(Math.abs(lc(hex("#b4b4b4"), PANEL)) >= 58, "dim");
+    });
+
+    test("the three tiers are still three tiers", () => {
+        // The worry with lifting muted and dim is that they collapse into --text and the
+        // page flattens. They don't: the spread is wider than it was.
+        const text = Math.abs(lc(hex("#eeeeee"), PANEL));
+        const muted = Math.abs(lc(hex("#c8c8c8"), PANEL));
+        const dim = Math.abs(lc(hex("#b4b4b4"), PANEL));
+        assert.ok(text > muted && muted > dim, "still ordered");
+        assert.ok(text - dim > 30, "and still a real spread");
+    });
+});

tests/holdem/assumedContributions.test.js

@@ -0,0 +1,175 @@
+// Chips the pot was priced with that nobody actually paid.
+//
+// There are two ways a contribution gets into this tool. Tapping the action moves
+// chips: the bet leaves the stack, sits in front of the player, and is swept into their
+// hand total at the end of the street. The other is the "without live betting" panel —
+// a base pot amount, or chips counted out on a seat — where the dealer is recording a
+// hand they are watching rather than driving, and nothing ever leaves a stack.
+//
+// The pot wizard prices both the same way and awarding it credits the winner, so in
+// that second mode the table simply grew.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Money, Betting, HoldemState, chipsOnTable } = require("./load");
+
+const basePotTable = (base = 50, stack = 200) => {
+    const state = HoldemState.createDefault();
+    HoldemState.resizeSeats(state, 4);
+    state.basePotAmount = base;
+    ["Ann", "Ben", "Cal"].forEach((name, i) => {
+        state.seats[i].name = name;
+        state.seats[i].inHand = true;
+        state.seats[i].stack = stack;
+        state.seats[i].buyIns = stack;
+    });
+    return state;
+};
+
+const pricedPot = (state) => state.seats.reduce(
+    (sum, p) => sum + HoldemState.computeContribution(p, state.chipLegend, state.basePotAmount), 0);
+
+describe("what nobody paid", () => {
+    test("comes off the stacks that owe it", () => {
+        const state = basePotTable();
+        const collected = Betting.collectAssumedContributions(state);
+        assert.equal(collected.total, 150);
+        assert.deepEqual(collected.taken.map(row => row.name), ["Ann", "Ben", "Cal"]);
+        assert.deepEqual(state.seats.slice(0, 3).map(p => p.stack), [150, 150, 150]);
+    });
+
+    test("and lands where the rest of the tool looks for chips in the middle", () => {
+        const state = basePotTable();
+        Betting.collectAssumedContributions(state);
+        assert.deepEqual(state.seats.slice(0, 3).map(p => p.amountOverride), [50, 50, 50]);
+        assert.equal(HoldemState.unresolvedContributions(state), 150);
+    });
+
+    test("chips counted out on a seat are money too", () => {
+        const state = basePotTable(0);
+        state.seats[0].chipCounts = { red: 4 };    // four $5 chips
+        const collected = Betting.collectAssumedContributions(state);
+        assert.equal(collected.total, 20);
+        assert.equal(state.seats[0].stack, 180);
+    });
+});
+
+describe("what has already been paid", () => {
+    test("a live bet is left exactly alone", () => {
+        const state = basePotTable(0);
+        state.smallBlind = 5;
+        state.bigBlind = 10;
+        Betting.beginHand(state);
+        const before = state.seats.map(p => Betting.stackOf(state, p));
+
+        const collected = Betting.collectAssumedContributions(state);
+        assert.equal(collected.total, 0, "the blinds are already off their stacks");
+        assert.deepEqual(state.seats.map(p => Betting.stackOf(state, p)), before);
+    });
+
+    test("nor is a swept street taken a second time", () => {
+        const state = basePotTable(0);
+        state.smallBlind = 5;
+        state.bigBlind = 10;
+        Betting.beginHand(state);
+        Betting.sweepToHandTotals(state);
+        const before = state.seats.map(p => Betting.stackOf(state, p));
+
+        assert.equal(Betting.collectAssumedContributions(state).total, 0);
+        assert.deepEqual(state.seats.map(p => Betting.stackOf(state, p)), before);
+    });
+
+    test("a base pot on top of a live bet only collects the difference", () => {
+        // The base pot says "assume everyone is in for fifty". Somebody who has already
+        // put twenty in owes thirty of it, not fifty.
+        const state = basePotTable(50);
+        state.seats[0].committed = 20;
+        state.seats[0].stack = 180;
+        const collected = Betting.collectAssumedContributions(state);
+        const ann = collected.taken.find(row => row.name === "Ann");
+        assert.equal(ann.amount, 30);
+        assert.equal(state.seats[0].stack, 150, "fifty in the middle, either way");
+    });
+});
+
+describe("what it will not do", () => {
+    test("take more than a player is holding", () => {
+        const state = basePotTable(50);
+        state.seats[1].stack = 20;
+        Betting.collectAssumedContributions(state);
+        assert.equal(state.seats[1].stack, 0, "all of it, and no further");
+        assert.equal(state.seats[1].amountOverride, 20);
+    });
+
+    test("touch an empty chair", () => {
+        const state = basePotTable();
+        const before = { ...state.seats[3] };
+        Betting.collectAssumedContributions(state);
+        assert.equal(state.seats[3].stack, before.stack);
+        assert.equal(state.seats[3].amountOverride, before.amountOverride);
+    });
+
+    test("or a seat that isn't in the hand", () => {
+        // The base pot stands in for "everyone put the same in", and somebody sitting
+        // out did not.
+        const state = basePotTable();
+        state.seats[2].inHand = false;
+        const collected = Betting.collectAssumedContributions(state);
+        assert.deepEqual(collected.taken.map(row => row.name), ["Ann", "Ben"]);
+        assert.equal(state.seats[2].stack, 200);
+    });
+});
+
+describe("the whole hand", () => {
+    test("conserves the chips on the table, which it did not before", () => {
+        const state = basePotTable();
+        const total = chipsOnTable(state);
+        const pot = pricedPot(state);
+
+        Betting.collectAssumedContributions(state);
+        Betting.creditWinnings(state, [{ id: state.seats[0].id, label: "Ann", amount: pot }]);
+        HoldemState.startNextHand(state);
+
+        assert.equal(chipsOnTable(state), total, "six hundred before, six hundred after");
+        assert.deepEqual(state.seats.slice(0, 3).map(p => p.stack), [300, 150, 150]);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+    });
+
+    test("and the bank check stays balanced all the way through", () => {
+        const state = basePotTable();
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+        Betting.collectAssumedContributions(state);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true, "chips are in the middle, not gone");
+        Betting.creditWinnings(state, [{ id: state.seats[0].id, label: "Ann", amount: 150 }]);
+        HoldemState.startNextHand(state);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+    });
+
+    test("a live-betting hand is unchanged by any of this", () => {
+        const state = basePotTable(0);
+        state.smallBlind = 5;
+        state.bigBlind = 10;
+        const total = chipsOnTable(state);
+        Betting.beginHand(state);
+        [3, 0, 1, 2].forEach(() => { if (state.actingSeatIndex !== null) Betting.call(state, state.actingSeatIndex); });
+        Betting.sweepToHandTotals(state);
+        const pot = HoldemState.unresolvedContributions(state);
+
+        Betting.collectAssumedContributions(state);
+        Betting.creditWinnings(state, [{ id: state.seats[0].id, label: "Ann", amount: pot }]);
+        HoldemState.startNextHand(state);
+
+        assert.equal(chipsOnTable(state), total);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+    });
+
+    test("collecting twice takes nothing the second time", () => {
+        // The pot wizard can be opened, cancelled and opened again.
+        const state = basePotTable();
+        Betting.collectAssumedContributions(state);
+        const stacks = state.seats.map(p => p.stack);
+        const again = Betting.collectAssumedContributions(state);
+        assert.equal(again.total, 0);
+        assert.deepEqual(state.seats.map(p => p.stack), stacks);
+    });
+});

tests/holdem/auditContrast.test.js

@@ -0,0 +1,108 @@
+// The sums the contrast check runs on, tested away from a browser.
+//
+// The check itself needs a page to look at, but the arithmetic underneath it doesn't —
+// and the arithmetic is the part that decides whether a real fault is reported or
+// waved through. Faded text used to be filed as "not checked" rather than measured;
+// this is the compositing that replaced that.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const LayoutAudit = require("./uiAudit");
+
+const WHITE = { r: 255, g: 255, b: 255, a: 1 };
+const BLACK = { r: 0, g: 0, b: 0, a: 1 };
+const PAGE = { r: 28, g: 28, b: 28, a: 1 };      // the felt page behind everything
+const PUCK = { r: 44, g: 44, b: 44, a: 1 };      // a seat's own background
+
+describe("the ratio itself", () => {
+    test("black on white is the full 21:1, either way round", () => {
+        assert.ok(Math.abs(LayoutAudit.contrastRatio(BLACK, WHITE) - 21) < 0.01);
+        assert.ok(Math.abs(LayoutAudit.contrastRatio(WHITE, BLACK) - 21) < 0.01);
+    });
+
+    test("a colour against itself is 1:1", () => {
+        assert.ok(Math.abs(LayoutAudit.contrastRatio(PUCK, PUCK) - 1) < 0.001);
+    });
+});
+
+describe("text on a box that is being faded", () => {
+    // opacity on a box fades the box and its text together onto whatever is behind
+    // it — so a dimmed seat is not grey text on a dark puck, it is a faded puck and
+    // faded text both landing on the page.
+    const fade = alpha => ({ alpha, behind: PAGE });
+
+    test("at full strength nothing is composited", () => {
+        const painted = LayoutAudit.asPainted(WHITE, PUCK, { alpha: 1, behind: PAGE });
+        assert.deepEqual(painted.fg, WHITE);
+        assert.deepEqual(painted.bg, PUCK);
+    });
+
+    test("fading moves both the text and its background, not just the text", () => {
+        const painted = LayoutAudit.asPainted(WHITE, PUCK, fade(0.7));
+        assert.ok(painted.fg.r < WHITE.r, "the text dims");
+        assert.ok(painted.bg.r < PUCK.r, "and so does what it sits on");
+        assert.ok(painted.bg.r > PAGE.r, "but not all the way to the page");
+    });
+
+    test("which is what stops a fade being reported as a fault it isn't", () => {
+        // Dimming light text on a dark puck over a dark page costs contrast, but far
+        // less than measuring the faded text against the *unfaded* puck would claim.
+        const honest = LayoutAudit.asPainted(WHITE, PUCK, fade(0.7));
+        const wrong = { fg: LayoutAudit.over({ ...WHITE, a: 0.7 }, PUCK), bg: PUCK };
+        assert.ok(LayoutAudit.contrastRatio(honest.fg, honest.bg) >
+            LayoutAudit.contrastRatio(wrong.fg, wrong.bg));
+    });
+
+    test("a fade all the way out lands everything on the page behind", () => {
+        const painted = LayoutAudit.asPainted(WHITE, PUCK, fade(0));
+        assert.deepEqual(painted.fg, PAGE);
+        assert.deepEqual(painted.bg, PAGE);
+    });
+
+    test("with nothing known to be behind it, the fade is left alone", () => {
+        // Better to measure the unfaded pair than to invent a backdrop.
+        const painted = LayoutAudit.asPainted(WHITE, PUCK, { alpha: 0.5, behind: null });
+        assert.deepEqual(painted.fg, WHITE);
+        assert.deepEqual(painted.bg, PUCK);
+    });
+});
+
+describe("a fade makes small grey text worse, which is the fault it went looking for", () => {
+    // Deliberately not asserting a particular CSS colour here: the page's own greys are
+    // measured in the browser, against the real gradients, where they live. What this
+    // pins is the direction — that dimming a box costs its text contrast, which is why
+    // filing faded text as "not checked" hid faults rather than avoiding false ones.
+    test("the same grey scores lower once its box is dimmed", () => {
+        const grey = LayoutAudit.parseColour("rgb(138, 138, 138)");
+        const solid = LayoutAudit.asPainted(grey, PUCK, { alpha: 1, behind: PAGE });
+        const dimmed = LayoutAudit.asPainted(grey, PUCK, { alpha: 0.7, behind: PAGE });
+        assert.ok(LayoutAudit.contrastRatio(dimmed.fg, dimmed.bg) <
+            LayoutAudit.contrastRatio(solid.fg, solid.bg));
+    });
+
+    test("and a lighter grey scores higher at the same fade", () => {
+        const at = colour => {
+            const painted = LayoutAudit.asPainted(LayoutAudit.parseColour(colour), PUCK, { alpha: 0.7, behind: PAGE });
+            return LayoutAudit.contrastRatio(painted.fg, painted.bg);
+        };
+        assert.ok(at("rgb(174, 174, 174)") > at("rgb(138, 138, 138)"));
+    });
+});
+
+describe("reading a colour off the page", () => {
+    test("rgb and rgba both come back as numbers", () => {
+        assert.deepEqual(LayoutAudit.parseColour("rgb(1, 2, 3)"), { r: 1, g: 2, b: 3, a: 1 });
+        assert.deepEqual(LayoutAudit.parseColour("rgba(1, 2, 3, 0.5)"), { r: 1, g: 2, b: 3, a: 0.5 });
+    });
+
+    test("a gradient gives up every stop, because text could be over any of them", () => {
+        const stops = LayoutAudit.gradientStops("linear-gradient(rgb(203, 170, 240), rgb(169, 127, 214))");
+        assert.equal(stops.length, 2);
+        assert.deepEqual(stops[0], { r: 203, g: 170, b: 240, a: 1 });
+        assert.deepEqual(stops[1], { r: 169, g: 127, b: 214, a: 1 });
+    });
+
+    test("no background image, no stops", () => {
+        assert.deepEqual(LayoutAudit.gradientStops("none"), []);
+    });
+});

tests/holdem/betChips.test.js

@@ -0,0 +1,473 @@
+// Where a player's bet sits on the felt.
+//
+// The chips were the last thing on the table nobody had measured. They were laid out on
+// a ring of their own at a fixed 27/44 of the seat's reach — a fraction picked when the
+// seat ring was itself fixed — and the choice between that ring and clinging to the
+// puck was made by asking how wide the *window* was. Neither of those is a question
+// about the felt. A phone held sideways is 844px across and gives the felt 117px of
+// height: it passed the width test, took the ring, and every chip on it was painted
+// behind a seat. The seats carry `z-index: 1` and the bets layer carries none, so a
+// chip under a puck is not dimmed or half-hidden — it is gone, and with it the only
+// number saying what that player has in.
+//
+// Everything below is geometry, so it runs without a browser. The felts are the ones
+// measured on real screens: 692x117 is a phone on its side, 300x216 a phone upright.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Render } = require("./load");
+
+const RADII = { rx: 44, ry: 42 };
+const PUCK = { width: 96, height: 64 };
+const CHIP = { width: 44, height: 22 };
+
+const felt = (width, height) => ({ width, height });
+const spacingOn = (box, puck = PUCK, chip = CHIP) =>
+    ({ box, puck, chip, clearance: Render.BET_CLEARANCE_PX });
+
+// A chip's centre in pixels on a given felt.
+const chipPixels = (index, count, box, spacing, radii = RADII) => {
+    const pos = Render.betPosition(index, count, box.width / box.height, radii, spacing);
+    return { x: (pos.left / 100) * box.width, y: (pos.top / 100) * box.height };
+};
+
+const seatPixels = (index, count, box, radii = RADII) => {
+    const pos = Render.seatPosition(index, count, box.width / box.height, radii);
+    return { x: (pos.left / 100) * box.width, y: (pos.top / 100) * box.height };
+};
+
+// Two axis-aligned boxes, by their centres. The same test the seats settle among
+// themselves — see seatFootprint.test.js — because it is the same question.
+const boxesOverlap = (a, b, sizeA, sizeB) =>
+    Math.abs(a.x - b.x) < (sizeA.width + sizeB.width) / 2 - 0.5 &&
+    Math.abs(a.y - b.y) < (sizeA.height + sizeB.height) / 2 - 0.5;
+
+describe("reaching the edge of a box", () => {
+    test("straight out the side is half the width, straight up half the height", () => {
+        assert.equal(Render.edgeReach(96, 64, 1, 0), 48);
+        assert.equal(Render.edgeReach(96, 64, 0, -1), 32);
+        assert.equal(Render.edgeReach(96, 64, -1, 0), 48);
+    });
+
+    test("a corner is whichever edge the ray meets first", () => {
+        // 45° out of a 96x64 box: the top and bottom are nearer than the sides, so the
+        // ray leaves through one of those. A single radius — half the diagonal, 57.7 —
+        // would put a chip 25px further out than it needs to be, which on a 117px felt
+        // is the difference between clear of the puck and off the table.
+        const diagonal = Render.edgeReach(96, 64, Math.SQRT1_2, Math.SQRT1_2);
+        assert.ok(Math.abs(diagonal - 32 / Math.SQRT1_2) < 1e-9, `got ${diagonal}`);
+        assert.ok(diagonal < 48, "and never further than the wider half-edge");
+    });
+
+    test("a square is the same in every direction it is asked about", () => {
+        const straight = Render.edgeReach(50, 50, 0, 1);
+        assert.equal(Render.edgeReach(50, 50, 1, 0), straight);
+    });
+});
+
+describe("getting one box clear of another", () => {
+    const PUCK96 = { width: 96, height: 88 };
+    const CHIP50 = { width: 50, height: 21 };
+
+    // Travel `t` along `u` from the puck's centre, then ask whether the two boxes are
+    // apart. This is the question clearanceReach is supposed to answer, asked the long
+    // way round so the answer can be checked rather than restated.
+    const apart = (t, ux, uy) =>
+        Math.abs(t * ux) >= (PUCK96.width + CHIP50.width) / 2 - 1e-9 ||
+        Math.abs(t * uy) >= (PUCK96.height + CHIP50.height) / 2 - 1e-9;
+
+    test("straight up and down it is what adding the two half-heights gives", () => {
+        assert.equal(Render.clearanceReach(PUCK96, CHIP50, 0, -1), (88 + 21) / 2);
+        assert.equal(Render.clearanceReach(PUCK96, CHIP50, 1, 0), (96 + 50) / 2);
+    });
+
+    test("on a diagonal it is more than the two reaches added together", () => {
+        // The bug this replaced. Two axis-aligned boxes are clear when they are apart on
+        // one axis, and the travel that achieves that is the reach of the box you get by
+        // adding their widths and their heights — which is never less, and on a diagonal
+        // is more, than adding the two boxes' own reaches. At 768x1024 the difference was
+        // 11px, and 11px is how far inside its own player's puck the chip came to rest.
+        const dirs = [[0.83, 0.56], [0.6, 0.8], [0.9, 0.44], [Math.SQRT1_2, Math.SQRT1_2]];
+        let shortfalls = 0;
+        dirs.forEach(([ux, uy]) => {
+            const summed = Render.edgeReach(PUCK96.width, PUCK96.height, ux, uy) +
+                Render.edgeReach(CHIP50.width, CHIP50.height, ux, uy);
+            const proper = Render.clearanceReach(PUCK96, CHIP50, ux, uy);
+            assert.ok(proper >= summed - 1e-9, `${ux},${uy}: ${proper} < ${summed}`);
+            if (proper <= summed + 1e-9) return;
+            // Where they differ, the old answer was not merely smaller — it was wrong:
+            // travelling that far leaves the two boxes still on top of each other.
+            shortfalls++;
+            assert.ok(!apart(summed, ux, uy),
+                `${ux},${uy}: adding the reaches gave ${summed.toFixed(1)}, which is enough after all`);
+        });
+        assert.ok(shortfalls >= 2, "expected the two to actually differ on some of these");
+    });
+
+    test("and it is exactly enough — a hair less is not", () => {
+        const dirs = [[0, -1], [1, 0], [0.83, 0.56], [0.6, -0.8], [-0.9, 0.44]];
+        dirs.forEach(([ux, uy]) => {
+            const t = Render.clearanceReach(PUCK96, CHIP50, ux, uy);
+            assert.ok(apart(t, ux, uy), `${ux},${uy}: ${t}px still overlaps`);
+            assert.ok(!apart(t - 0.5, ux, uy), `${ux},${uy}: ${t}px is further than needed`);
+        });
+    });
+});
+
+describe("a chip on the ring", () => {
+    test("with nothing measured it keeps the proportions the ring always used", () => {
+        // The unit suite and the very first render both call it this way. 27/44 and
+        // 25/42 of the seat's own reach, so the chips move with the ring rather than
+        // with the felt.
+        const seat = Render.seatPosition(3, 9, 1.4, RADII);
+        const chip = Render.betPosition(3, 9, 1.4, RADII, null);
+        assert.ok(Math.abs((chip.left - 50) - (seat.left - 50) * (27 / 44)) < 1e-9);
+        assert.ok(Math.abs((chip.top - 50) - (seat.top - 50) * (25 / 42)) < 1e-9);
+    });
+
+    test("measured, it sits just clear of its own puck rather than at a fixed fraction", () => {
+        const box = felt(560, 400);
+        const spacing = spacingOn(box);
+        for (let i = 0; i < 9; i++) {
+            const seat = seatPixels(i, 9, box);
+            const chip = chipPixels(i, 9, box, spacing);
+            assert.ok(!boxesOverlap(seat, chip, PUCK, CHIP),
+                `seat ${i + 1}'s own chip is under its own puck`);
+        }
+    });
+
+    test("and never wanders into the pot badge in the middle", () => {
+        // The floor: 38% of the way out. Without it a chip walked in past a puck that
+        // is 96px wide on a felt whose reach is 90px would land on the pot total, which
+        // is the same fault at the other end of the spoke.
+        const box = felt(300, 216);
+        const spacing = spacingOn(box, { width: 200, height: 150 });
+        for (let i = 0; i < 6; i++) {
+            const seat = seatPixels(i, 6, box);
+            const chip = chipPixels(i, 6, box, spacing);
+            const seatReach = Math.hypot(seat.x - box.width / 2, seat.y - box.height / 2);
+            const chipReach = Math.hypot(chip.x - box.width / 2, chip.y - box.height / 2);
+            assert.ok(chipReach >= seatReach * 0.38 - 0.5,
+                `chip ${i + 1} is ${chipReach.toFixed(1)}px out of a possible ${seatReach.toFixed(1)}`);
+        }
+    });
+
+    test("a seat sitting dead centre gets its chip put somewhere, not NaN", () => {
+        const box = felt(400, 300);
+        const pos = Render.betPosition(0, 1, box.width / box.height, { rx: 0, ry: 0 }, spacingOn(box));
+        assert.ok(Number.isFinite(pos.left) && Number.isFinite(pos.top), JSON.stringify(pos));
+    });
+});
+
+describe("deciding whether a ring of chips fits at all", () => {
+    // The shape the layout works in: one entry per chip on the felt, carrying its own
+    // measured size, because a chip is as wide as the number printed on it.
+    const tableOf = (count, chip = CHIP) => {
+        Render.state = { seatCount: count, seats: Array.from({ length: count }, () => ({})) };
+        return Array.from({ length: count }, (_, i) =>
+            ({ index: i, width: chip.width, height: chip.height }));
+    };
+
+    test("a desktop felt has room for one", () => {
+        const box = felt(700, 500);
+        const all = tableOf(9);
+        assert.equal(Render.chipsClearTheSeats(all, box.width / box.height, RADII, spacingOn(box)), true);
+    });
+
+    test("a phone on its side has not, whatever the window's width says about it", () => {
+        // 692x117, measured on an 844px-wide phone in landscape — a viewport that sails
+        // past a `max-width: 700px` test. The ring is a slot: the 38% floor puts a chip
+        // on the seat across the table from it.
+        const box = felt(692, 117);
+        const all = tableOf(9);
+        assert.equal(Render.chipsClearTheSeats(all, box.width / box.height, RADII, spacingOn(box)), false,
+            "this is the felt where every chip was painted behind a puck");
+    });
+
+    test("its answer is the one the geometry gives", () => {
+        // Not a restatement of the two cases above: whatever it returns, it has to agree
+        // with laying the chips out and measuring them against every puck on the felt.
+        const shapes = [felt(700, 500), felt(692, 117), felt(300, 216), felt(1000, 620), felt(480, 300)];
+        shapes.forEach(box => {
+            const all = tableOf(9);
+            const spacing = spacingOn(box);
+            const aspect = box.width / box.height;
+            const clear = all.every(({ index: i }) => {
+                const chip = chipPixels(i, 9, box, spacing);
+                return all.every(({ index: j }) => !boxesOverlap(chip, seatPixels(j, 9, box), CHIP, PUCK));
+            });
+            assert.equal(Render.chipsClearTheSeats(all, aspect, RADII, spacing), clear,
+                `${box.width}x${box.height}`);
+        });
+    });
+
+    test("each chip is asked about at its own size", () => {
+        // A chip is as wide as the number on it: at 768x1024, four players' chips were
+        // 40px and one holding a four-figure bet was 47. Answering the question once, at
+        // the widest, told the whole felt it had no room for a ring — and dropped all
+        // five chips onto their own players' stacks to solve a problem four of them
+        // did not have.
+        // The felt and the pucks are the iPad's own, measured: 672x672, pucks 96x88.
+        const box = felt(672, 672);
+        const narrow = { width: 40, height: 20 };
+        const huge = { width: 420, height: 380 };
+        const spacing = { box, puck: { width: 96, height: 88 }, clearance: Render.BET_CLEARANCE_PX };
+        const aspect = box.width / box.height;
+
+        assert.equal(Render.chipsClearTheSeats(tableOf(9, narrow), aspect, RADII, spacing), true,
+            "a felt this size has room for a ring of ordinary chips");
+        assert.equal(Render.chipsClearTheSeats(tableOf(9, huge), aspect, RADII, spacing), false,
+            "and none at all for a ring of chips that size");
+
+        // Now one of each. The answer has to come from the sizes in the list, not from
+        // one size standing in for all of them: with one huge chip the ring is off, and
+        // taking that chip out of the question puts it back.
+        const mixed = tableOf(9, narrow);
+        mixed[0] = { index: 0, ...huge };
+        assert.equal(Render.chipsClearTheSeats(mixed, aspect, RADII, spacing), false);
+        assert.equal(Render.chipsClearTheSeats(mixed.slice(1), aspect, RADII, spacing), true,
+            "the eight ordinary ones were never the problem");
+    });
+
+    test("and at the chips against each other", () => {
+        // The ring is a smaller circle than the seats' one and holds the same number of
+        // things, so it is the tighter fit of the two. Measured on a Pixel 7 with twelve
+        // players, two $10s on the ring sat on top of each other while every puck on the
+        // felt was clear — so a check that only looks at the pucks says yes to a layout
+        // that hides one player's bet behind another's.
+        // The Pixel 7's own numbers, measured: a 300x336 felt on a ring of 44 by 40.84,
+        // pucks 44x55, a pot badge 64x53, and the seven players who had put chips in.
+        const box = felt(300, 336);
+        const radii = { rx: 44, ry: 40.84 };
+        const puck = { width: 44, height: 55 };
+        const pot = { x: 150, y: 168, width: 64, height: 53 };
+        const spacing = { box, puck, pot, clearance: Render.BET_CLEARANCE_PX };
+        const aspect = box.width / box.height;
+
+        Render.state = { seatCount: 12, seats: Array.from({ length: 12 }, () => ({})) };
+        const bettors = [2, 3, 4, 5, 6, 7, 8];
+        const all = bettors.map(index => ({ index, width: index === 2 ? 44.1 : 49.7, height: 21 }));
+
+        const chips = all.map(entry => ({
+            ...entry,
+            ...chipPixels(entry.index, 12, box,
+                { ...spacing, chip: { width: entry.width, height: entry.height } }, radii),
+        }));
+        const seats = [...Array(12).keys()].map(i => seatPixels(i, 12, box, radii));
+
+        assert.equal(chips.some(chip => seats.some(seat => boxesOverlap(chip, seat, chip, puck))), false,
+            "this table is chosen so the pucks are not the problem");
+        assert.equal(chips.some(chip => boxesOverlap(chip, pot, chip, pot)), false,
+            "nor the pot");
+        assert.ok(chips.some((chip, i) => chips.some((other, j) => i !== j &&
+            boxesOverlap(chip, other, chip, other))), "and so the chips are");
+
+        assert.equal(Render.chipsClearTheSeats(all, aspect, radii, spacing), false);
+    });
+
+    test("it looks at every puck, not just the chip's own", () => {
+        // The rule this replaced walked each chip in until it was clear of its *own*
+        // seat and stopped there, which says nothing about the eight other pucks on the
+        // felt. 560x190 is a felt where that rule is satisfied and the ring is still no
+        // good: every chip clears the puck it belongs to, and one of them is sitting on
+        // a stranger's.
+        const box = felt(560, 190);
+        const all = tableOf(9);
+        const spacing = spacingOn(box);
+        const chips = all.map(({ index: i }) => chipPixels(i, 9, box, spacing));
+
+        all.forEach(({ index: i }) => assert.ok(!boxesOverlap(chips[i], seatPixels(i, 9, box), CHIP, PUCK),
+            `chip ${i + 1} is under its own puck, so this felt does not make the point`));
+        assert.ok(all.some(({ index: i }) => all.some(({ index: j }) => i !== j &&
+                boxesOverlap(chips[i], seatPixels(j, 9, box), CHIP, PUCK))),
+            "expected a chip on somebody else's puck — what the old rule could not see");
+        assert.equal(Render.chipsClearTheSeats(all, box.width / box.height, RADII, spacing), false);
+    });
+});
+
+describe("a chip clinging to its puck", () => {
+    // The fallback when there is no room for a ring: the chip hangs off the puck on the
+    // side facing the empty middle of the felt.
+    //
+    // The felts the app actually draws, with the puck size each one settles on — read
+    // off the running site at each viewport rather than guessed here, because the tight
+    // felts shrink the puck too, and a test that holds the desktop's 96x64 puck against
+    // a 528x83 felt is describing a table the app never draws.
+    const REAL = [
+        ["Galaxy S8 on its side", felt(528, 83), { width: 44, height: 55 }],
+        ["iPhone on its side", felt(692, 113), { width: 72, height: 55 }],
+        ["Galaxy S8 upright, six-handed", felt(248, 280), { width: 78, height: 88 }],
+        ["Galaxy S8 upright, packed", felt(248, 280), { width: 44, height: 55 }],
+    ];
+    // Chips are 21x17 everywhere they are anchored — the amount is the only thing on
+    // one at that size.
+    const TIGHT = { puck: { width: 44, height: 55 }, chip: { width: 21, height: 17 } };
+
+    // What each chip is told to do, worked out for the whole table at once.
+    const placeAll = (count, box, puck, chip = TIGHT.chip, radii = RADII) => {
+        Render.state = { seatCount: count, seats: Array.from({ length: count }, () => ({})) };
+        const indices = [...Array(count).keys()];
+        const entries = indices.map(i => ({ index: i, width: chip.width, height: chip.height }));
+        const spacing = { box, puck, clearance: Render.BET_CLEARANCE_PX };
+        const offs = Render.anchoredChipTravel(entries, count, box.width / box.height, RADII, spacing);
+        return indices.map(i => {
+            const seat = Render.seatPosition(i, count, box.width / box.height, radii);
+            const at = { x: (seat.left / 100) * box.width, y: (seat.top / 100) * box.height };
+            const off = offs[i];
+            return { seat: at, chip: { x: at.x + off.x, y: at.y + off.y }, off, puck };
+        });
+    };
+
+    test("on its own, a chip asks to sit just clear of its puck", () => {
+        const box = felt(692, 113);
+        const puck = { width: 72, height: 55 };
+        const seat = Render.seatPosition(0, 9, box.width / box.height, RADII);
+        const off = Render.anchoredChipOffset(seat, puck, TIGHT.chip, box, RADII);
+        const travel = Math.hypot(off.x, off.y);
+        const ux = off.x / travel, uy = off.y / travel;
+        assert.ok(Math.abs(travel -
+            (Render.clearanceReach(puck, TIGHT.chip, ux, uy) + Render.BET_CLEARANCE_PX)) < 1e-6, `travelled ${travel}`);
+    });
+
+    test("and gets it, where nothing else is in the way", () => {
+        // 692x113 is the roomier of the two landscape felts. Every chip clears its own
+        // puck and none of them has to give ground.
+        placeAll(9, felt(692, 113), { width: 72, height: 55 }).forEach((row, i) => {
+            assert.ok(!boxesOverlap(row.seat, row.chip, row.puck, TIGHT.chip),
+                `seat ${i + 1}'s chip is inside its own puck, and nothing made it go there`);
+        });
+    });
+
+    test("it goes off the rim, not down the spoke", () => {
+        // On a felt 692x113 the two are nowhere near the same direction. A seat on the
+        // top rail has a spoke pointing diagonally inward — which along a slot this flat
+        // runs sideways into the next seat — while off the rim is very nearly straight
+        // down, into the empty middle. This is the seam that put two chips on top of
+        // each other on a Galaxy S8.
+        const box = felt(692, 113);
+        const rows = placeAll(9, box, { width: 72, height: 55 });
+        const top = rows.find(r => r.seat.y < box.height * 0.3 && r.seat.x > box.width * 0.7);
+        assert.ok(top, "expected a seat up on the right of the top rail");
+        assert.ok(Math.abs(top.off.y) > Math.abs(top.off.x) * 2,
+            `chip went ${top.off.x.toFixed(1)},${top.off.y.toFixed(1)} — that is along the rail, not off it`);
+        assert.ok(top.off.y > 0, "and downward, toward the middle of the felt");
+    });
+
+    test("no two chips on a full table land on each other", () => {
+        // Four sides gave three seams. There are no sides now, and this is what that is
+        // worth — on every felt the app actually draws, at every table size.
+        REAL.forEach(([name, box, puck]) => {
+            [6, 9, 12].forEach(count => {
+                const rows = placeAll(count, box, puck);
+                for (let a = 0; a < rows.length; a++) {
+                    for (let b = a + 1; b < rows.length; b++) {
+                        assert.ok(!boxesOverlap(rows[a].chip, rows[b].chip, TIGHT.chip, TIGHT.chip),
+                            `${name}, ${count} seats: chips ${a + 1} and ${b + 1} overlap`);
+                    }
+                }
+            });
+        });
+    });
+
+    test("a chip only gives ground when it is standing on something", () => {
+        // The point of pulling chips back one at a time rather than by a rule that
+        // applies to all of them. Stopping every chip at the felt's midline, or scaling
+        // them all by one factor, takes travel from the seats at the ends of a long
+        // rail — measured at 692x113, that parked two chips on their own player's stack
+        // to solve a collision that did not exist.
+        //
+        // So: every chip either got everything it asked for, or putting the last step
+        // back reintroduces a collision it is part of. The step goes back for all of
+        // them at once, because a facing pair gives ground together and the pass that
+        // finally separates such a pair moves both ends of it.
+        const step = Render.CHIP_PULLBACK_STEP_PX;
+        REAL.forEach(([name, box, puck]) => {
+            [6, 9, 12].forEach(count => {
+                const rows = placeAll(count, box, puck).map(row => {
+                    const travel = Math.hypot(row.off.x, row.off.y);
+                    const dir = travel < 1e-6 ? { x: 0, y: 0 } : { x: row.off.x / travel, y: row.off.y / travel };
+                    const asked = travel < 1e-6 ? 0 :
+                        Render.clearanceReach(puck, TIGHT.chip, dir.x, dir.y) +
+                        Render.BET_CLEARANCE_PX;
+                    const back = Math.min(asked, travel + step);
+                    return { ...row, travel, asked,
+                        undone: { x: row.seat.x + dir.x * back, y: row.seat.y + dir.y * back } };
+                });
+
+                rows.forEach((row, i) => {
+                    if (row.travel < 1e-6 || row.travel >= row.asked - 1e-6) return;
+                    const onSomething = rows.some((other, j) => j !== i && (
+                        boxesOverlap(row.undone, other.undone, TIGHT.chip, TIGHT.chip) ||
+                        boxesOverlap(row.undone, other.seat, TIGHT.chip, puck)));
+                    assert.ok(onSomething,
+                        `${name}, ${count} seats: chip ${i + 1} stopped ${(row.asked - row.travel).toFixed(1)}px short of nothing`);
+                });
+            });
+        });
+    });
+
+    test("nobody is pushed further out than they asked to go", () => {
+        // The pull-back only ever takes travel away. A chip pushed past its clearance
+        // would be floating out on the felt with nothing to say whose it is.
+        REAL.forEach(([name, box, puck]) => {
+            placeAll(12, box, puck).forEach((row, i) => {
+                const travel = Math.hypot(row.off.x, row.off.y);
+                if (travel < 1e-6) return;
+                const ux = row.off.x / travel, uy = row.off.y / travel;
+                const asked = Render.clearanceReach(puck, TIGHT.chip, ux, uy) +
+                    Render.BET_CLEARANCE_PX;
+                assert.ok(travel <= asked + 0.5,
+                    `${name}: chip ${i + 1} went ${travel.toFixed(1)}px when ${asked.toFixed(1)} was asked for`);
+            });
+        });
+    });
+
+    test("the direction turns smoothly all the way round the ring", () => {
+        // The property a set of discrete sides cannot have, and the reason there are
+        // none: neighbouring seats get neighbouring directions, with no step anywhere.
+        const box = felt(560, 400);
+        const angles = Array.from({ length: 24 }, (_, i) => {
+            const seat = Render.seatPosition(i, 24, box.width / box.height, RADII);
+            const off = Render.anchoredChipOffset(seat, PUCK, CHIP, box, RADII);
+            return Math.atan2(off.y, off.x);
+        });
+        angles.forEach((angle, i) => {
+            const next = angles[(i + 1) % angles.length];
+            let turn = Math.abs(next - angle);
+            if (turn > Math.PI) turn = 2 * Math.PI - turn;
+            assert.ok(turn < Math.PI / 4,
+                `between seats ${i + 1} and ${i + 2} the chip jumps ${(turn * 180 / Math.PI).toFixed(0)}°`);
+        });
+    });
+
+    test("it stops short of the pot total as well", () => {
+        // The other thing in the middle of the felt, and the one number on the table
+        // that belongs to everybody. A seat on the middle of a rail sends its chip
+        // straight at it: on a Galaxy S8 on its side, seat 1's $10 was sitting on
+        // "Pot $65". The badge is measured rather than assumed to be at the centre —
+        // it lives on the table, not on either overlay, and the two are not concentric.
+        const box = felt(528, 83);
+        const pot = { x: 264, y: 40, width: 96, height: 34 };
+        Render.state = { seatCount: 12, seats: Array.from({ length: 12 }, () => ({})) };
+        const indices = [...Array(12).keys()];
+        const entries = indices.map(i =>
+            ({ index: i, width: TIGHT.chip.width, height: TIGHT.chip.height }));
+        const spacing = { box, puck: TIGHT.puck, clearance: Render.BET_CLEARANCE_PX, pot };
+        const offs = Render.anchoredChipTravel(entries, 12, box.width / box.height, RADII, spacing);
+
+        indices.forEach(i => {
+            const seat = Render.seatPosition(i, 12, box.width / box.height, RADII);
+            const chip = { x: (seat.left / 100) * box.width + offs[i].x,
+                           y: (seat.top / 100) * box.height + offs[i].y };
+            assert.ok(!boxesOverlap(chip, pot, TIGHT.chip, pot),
+                `chip ${i + 1} is on the pot total`);
+        });
+    });
+
+    test("a seat with no rim to be off still gets an answer", () => {
+        const box = felt(400, 300);
+        const off = Render.anchoredChipOffset({ left: 50, top: 50 }, PUCK, CHIP, box, RADII);
+        assert.ok(Number.isFinite(off.x) && Number.isFinite(off.y), JSON.stringify(off));
+        assert.ok(off.y < 0, "upward, which is where a puck's own writing is not");
+    });
+});

tests/holdem/board.test.js

@@ -0,0 +1,118 @@
+// The community cards, as a thing the table remembers.
+//
+// The board is the one part of a hand this tool never had a place for: hole cards go on
+// a seat, chips go in the middle, and the five cards everybody plays lived only on the
+// felt in front of the dealer. It is opt-in, because most nights nobody wants to enter
+// cards at all — and everything that reads it has to behave exactly as it always did
+// when it is off.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Betting, HoldemState, makeTable } = require("./load");
+
+const dealt = (over = {}) => {
+    const state = { ...makeTable({ seatCount: 6, stack: 200, smallBlind: 1, bigBlind: 2 }), ...over };
+    Betting.beginHand(state);
+    return state;
+};
+
+describe("a new table", () => {
+    test("has five empty slots and is not tracking them", () => {
+        const state = HoldemState.createDefault();
+        assert.deepEqual(state.board, ["", "", "", "", ""]);
+        assert.equal(state.trackBoard, false,
+            "off by default: a dealer who never asked for this should not be asked for cards");
+    });
+});
+
+describe("how many cards are out", () => {
+    test("none, three, four, five", () => {
+        assert.equal(Betting.boardCardsFor("preflop"), 0);
+        assert.equal(Betting.boardCardsFor("flop"), 3);
+        assert.equal(Betting.boardCardsFor("turn"), 4);
+        assert.equal(Betting.boardCardsFor("river"), 5);
+    });
+
+    test("and nothing at all for a street that isn't one", () => {
+        assert.equal(Betting.boardCardsFor("showdown"), 0);
+        assert.equal(Betting.boardCardsFor(undefined), 0);
+    });
+
+    test("it matches the streets the betting engine actually deals", () => {
+        // If a street is ever added, this is the table that has to hear about it —
+        // a street with no entry silently draws no cards.
+        Betting.STREETS.forEach(street => {
+            assert.ok(Object.prototype.hasOwnProperty.call(Betting.BOARD_CARDS, street),
+                `${street} has no card count`);
+        });
+    });
+});
+
+describe("clearing it", () => {
+    test("the next hand takes the board with it", () => {
+        const state = dealt();
+        state.board = ["AH", "KD", "9C", "4S", "2H"];
+        HoldemState.startNextHand(state);
+        assert.deepEqual(state.board, ["", "", "", "", ""]);
+    });
+
+    test("so does a misdeal", () => {
+        const state = dealt();
+        state.board = ["AH", "KD", "9C", "", ""];
+        Betting.takeHandBack(state);
+        assert.deepEqual(state.board, ["", "", "", "", ""]);
+    });
+
+    test("and so does dealing a hand, however the table got here", () => {
+        // Dealing twice off the same button — after a misdeal, or a table set up and
+        // then dealt again — would otherwise rank the last hand's board against this
+        // hand's cards, and it would look exactly like a real answer.
+        const state = dealt();
+        state.board = ["AH", "KD", "9C", "4S", "2H"];
+        Betting.beginHand(state);
+        assert.deepEqual(state.board, ["", "", "", "", ""]);
+    });
+
+    test("but turning the tracking off does not", () => {
+        // A dealer who taps the toggle mid-hand can tap it back; wiping the flop on
+        // the way past would cost them cards they had already entered.
+        const state = dealt({ trackBoard: true });
+        state.board = ["AH", "KD", "9C", "", ""];
+        state.trackBoard = false;
+        assert.deepEqual(state.board, ["AH", "KD", "9C", "", ""]);
+    });
+});
+
+describe("a board off a file", () => {
+    const migrated = board => HoldemState.migrate({
+        seats: [HoldemState.makePlayer()], board,
+    }).board;
+
+    test("a table saved before boards existed gets an empty one, not tracked", () => {
+        const parsed = HoldemState.migrate({ seats: [HoldemState.makePlayer()] });
+        assert.deepEqual(parsed.board, ["", "", "", "", ""]);
+        assert.equal(parsed.trackBoard, false);
+    });
+
+    test("it is always five slots, however many arrived", () => {
+        assert.equal(migrated(["AH"]).length, 5);
+        assert.equal(migrated(["AH", "KD", "9C", "4S", "2H", "3D", "5S"]).length, 5);
+        assert.equal(migrated("not an array").length, 5);
+        assert.equal(migrated(null).length, 5);
+    });
+
+    test("anything that isn't a card becomes an empty slot", () => {
+        assert.deepEqual(migrated(["AH", "ZZ", 7, null, "10H"]), ["AH", "", "", "", ""]);
+    });
+
+    test("and a real one keeps its place, upper-cased", () => {
+        assert.deepEqual(migrated(["ah", " kd ", "9c", "", ""]), ["AH", "KD", "9C", "", ""]);
+    });
+
+    test("tracking is only on if the file said so, in so many words", () => {
+        const on = HoldemState.migrate({ seats: [HoldemState.makePlayer()], trackBoard: true });
+        const truthy = HoldemState.migrate({ seats: [HoldemState.makePlayer()], trackBoard: "yes" });
+        assert.equal(on.trackBoard, true);
+        assert.equal(truthy.trackBoard, false, "a string is a file that has been edited, not a yes");
+    });
+});

tests/holdem/callingTheClock.test.js

@@ -0,0 +1,129 @@
+// Calling the clock on a player.
+//
+// The bar already had a stopwatch saying how long somebody had been thinking. This is
+// what a dealer does about it: a procedure with a shape — a set time, a countdown said
+// out loud, and a ruling at the end that depends on what the player was facing.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { ActionBar, Betting, makeTable } = require("./load");
+
+// The bar rebuilds the DOM when a clock starts; none of the rules below need it.
+const onTable = (state) => {
+    ActionBar.state = state;
+    ActionBar.render = () => {};
+    ActionBar.stopClock();
+    return ActionBar;
+};
+
+const dealt = () => {
+    const state = makeTable({ seatCount: 6, stack: 200, smallBlind: 1, bigBlind: 2, dealerSeatIndex: 0 });
+    Betting.beginHand(state);
+    return state;
+};
+
+describe("starting one", () => {
+    test("it runs on the player who is actually on the clock", () => {
+        const state = dealt();
+        const bar = onTable(state);
+        assert.equal(bar.clockRunning(), false, "nothing runs until it is called");
+        bar.callClock();
+        assert.equal(bar.clockRunning(), true);
+        assert.equal(bar.clockSeatIndex, state.actingSeatIndex);
+    });
+
+    test("with nobody to act there is nothing to call", () => {
+        const state = dealt();
+        state.actingSeatIndex = null;
+        const bar = onTable(state);
+        bar.callClock();
+        assert.equal(bar.clockRunning(), false);
+        assert.equal(bar.clockLeft(), null);
+    });
+
+    test("the dealer can put it away again", () => {
+        const bar = onTable(dealt());
+        bar.callClock();
+        bar.stopClock();
+        assert.equal(bar.clockRunning(), false);
+        assert.equal(bar.clockLeft(), null);
+    });
+});
+
+describe("the count", () => {
+    const at = (bar, seconds) => bar.clockLeft(bar.clockStartedAt + seconds * 1000);
+
+    test("is the player's own time and then a countdown", () => {
+        const bar = onTable(dealt());
+        bar.callClock();
+        assert.equal(at(bar, 0), bar.CLOCK_THINK_S + bar.CLOCK_COUNTDOWN_S);
+        assert.equal(at(bar, 30), bar.CLOCK_COUNTDOWN_S, "thirty gone, the countdown starts");
+        assert.equal(at(bar, 35), 5);
+    });
+
+    test("stops at zero rather than going negative", () => {
+        const bar = onTable(dealt());
+        bar.callClock();
+        assert.equal(at(bar, 40), 0);
+        assert.equal(at(bar, 600), 0, "ten minutes later it is still just up");
+    });
+});
+
+describe("what happens at zero", () => {
+    test("facing a bet, the hand is dead", () => {
+        const state = dealt();
+        const bar = onTable(state);
+        // Whoever is up pre-flop is facing the big blind.
+        const ruling = bar.clockRuling();
+        assert.equal(ruling.verb, "fold");
+        assert.match(ruling.label, /hand is dead/);
+        assert.match(ruling.say, /facing \$2/);
+    });
+
+    test("facing nothing, it is checked — slowness doesn't fold a free hand", () => {
+        const state = dealt();
+        // Everyone calls round to the big blind, who has nothing to call.
+        [3, 4, 5, 0, 1].forEach(seat => Betting.call(state, seat));
+        const bar = onTable(state);
+        assert.equal(state.actingSeatIndex, 2, "the big blind is up");
+        const ruling = bar.clockRuling();
+        assert.equal(ruling.verb, "check");
+        assert.match(ruling.label, /check for/i);
+    });
+
+    test("the ruling names the player, because the dealer has to say it out loud", () => {
+        const state = dealt();
+        state.seats[state.actingSeatIndex].name = "Priya";
+        const ruling = onTable(state).clockRuling();
+        assert.match(ruling.label, /Priya/);
+        assert.match(ruling.say, /Priya/);
+    });
+
+    test("with nobody to act there is no ruling to make", () => {
+        const state = dealt();
+        state.actingSeatIndex = null;
+        assert.equal(onTable(state).clockRuling(), null);
+    });
+});
+
+describe("what ends it", () => {
+    test("the player acting", () => {
+        const state = dealt();
+        const bar = onTable(state);
+        bar.callClock();
+        const wasOn = state.actingSeatIndex;
+        Betting.call(state, wasOn);
+        assert.notEqual(state.actingSeatIndex, wasOn, "the action has moved");
+        assert.equal(bar.clockRunning(), false, "so the clock is no longer this player's");
+    });
+
+    test("and it doesn't follow the action to the next player", () => {
+        // A clock is called on one decision. Left running it would put a countdown on
+        // somebody nobody asked about.
+        const state = dealt();
+        const bar = onTable(state);
+        bar.callClock();
+        Betting.call(state, state.actingSeatIndex);
+        assert.equal(bar.clockLeft(), null);
+    });
+});

tests/holdem/cashOut.test.js

@@ -0,0 +1,229 @@
+// Somebody leaving with their chips.
+//
+// The most ordinary thing that happens at a home game after midnight, and the tool had
+// nothing for it. Freeing the chair meant wiping the seat by hand, and then the bank
+// check — cash taken against chips on the table — declared the departing player's whole
+// stack missing for the rest of the night. Wiping their buy-in too silenced it, at the
+// price of losing their night from the standings and the file the dealer hands over.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Money, HoldemState, Betting, makeTable } = require("./load");
+
+const table = () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], stack: 200 });
+    ["Ann", "Ben", "Cal", "Dee"].forEach((name, i) => {
+        state.seats[i].name = name;
+        state.seats[i].buyIns = 200;
+    });
+    return state;
+};
+
+describe("counting them out", () => {
+    test("the preview is what the dealer's hands follow", () => {
+        const state = table();
+        state.seats[0].stack = 350;
+        const preview = HoldemState.cashOutPreview(state, 0);
+        assert.equal(preview.name, "Ann");
+        assert.equal(preview.chips, 350, "what they are holding");
+        assert.equal(preview.boughtIn, 200);
+        assert.equal(preview.net, 150, "up for the night");
+        assert.match(preview.breakdown, /\d+×\$\d+/, "and the chips that make it");
+    });
+
+    test("a player who is down reads as down, not as a smaller stack", () => {
+        const state = table();
+        state.seats[1].stack = 60;
+        assert.equal(HoldemState.cashOutPreview(state, 1).net, -140);
+    });
+
+    test("a seat that never set a stack is holding the table's starting stack", () => {
+        const state = table();
+        state.defaultStack = 200;
+        state.seats[2].stack = null;
+        assert.equal(HoldemState.cashOutPreview(state, 2).chips, 200);
+    });
+});
+
+describe("what it refuses", () => {
+    test("paying somebody with money still in the middle", () => {
+        const state = table();
+        Betting.beginHand(state);
+        const bb = state.seats.findIndex(p => (Number(p.committed) || 0) > 0);
+        const refusal = HoldemState.canCashOut(state, bb);
+        assert.equal(refusal.ok, false);
+        assert.match(refusal.reason, /in the pot/);
+        // And the refusal is the whole story: nothing moved.
+        assert.equal(HoldemState.cashOut(state, bb).ok, false);
+        assert.equal((state.cashedOut || []).length, 0);
+        assert.ok(state.seats[bb].name, "the seat is untouched");
+    });
+
+    test("an empty chair, which has nobody to pay", () => {
+        const state = table();
+        const refusal = HoldemState.canCashOut(state, 99);
+        assert.equal(refusal.ok, false);
+    });
+});
+
+describe("the chair afterwards", () => {
+    test("is empty and ready for the next player", () => {
+        const state = table();
+        state.seats[0].stack = 350;
+        HoldemState.cashOut(state, 0);
+        const seat = state.seats[0];
+        assert.equal(seat.name, "");
+        assert.equal(seat.stack, null);
+        assert.equal(seat.buyIns, 0);
+        assert.equal(seat.inHand, false);
+    });
+
+    test("belongs to somebody new, so two people's nights can't merge", () => {
+        const state = table();
+        const wasId = state.seats[0].id;
+        HoldemState.cashOut(state, 0);
+        assert.notEqual(state.seats[0].id, wasId);
+    });
+
+    test("and isn't owed the blind the person before them was posting", () => {
+        const state = table();
+        state.postingIn = [state.seats[0].id, state.seats[1].id];
+        HoldemState.cashOut(state, 0);
+        assert.deepEqual(state.postingIn, [state.seats[1].id]);
+    });
+});
+
+describe("the bank check", () => {
+    test("balanced before, balanced after — the chips went somewhere known", () => {
+        const state = table();
+        state.seats[0].stack = 350;
+        state.seats[1].stack = 50;
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+
+        HoldemState.cashOut(state, 0);
+        const bank = HoldemState.bankReconciliation(state);
+        assert.equal(bank.paidOut, 350);
+        assert.equal(bank.cashIn, 800, "their buy-in is still cash the box took");
+        assert.equal(bank.chipsInPlay, 450);
+        assert.equal(bank.balanced, true);
+    });
+
+    test("this is the fault it fixes: wiping the seat by hand loses $350", () => {
+        const state = table();
+        state.seats[0].stack = 350;
+        state.seats[1].stack = 50;   // so the table starts out balanced
+        // What a dealer had to do before: empty the chair themselves.
+        state.seats[0].name = "";
+        state.seats[0].stack = null;
+        state.seats[0].inHand = false;
+        const bank = HoldemState.bankReconciliation(state);
+        assert.equal(bank.balanced, false);
+        assert.equal(bank.difference, -350, "the tool called it missing money");
+    });
+
+    test("chips that really are missing still show as missing", () => {
+        // Counting a cash-out must not become a way of swallowing a genuine shortfall.
+        const state = table();
+        state.seats[0].stack = 350;
+        state.seats[1].stack = 50;    // balanced to start with
+        HoldemState.cashOut(state, 0);
+        state.seats[2].stack = 150;   // and now fifty chips have gone astray
+        const bank = HoldemState.bankReconciliation(state);
+        assert.equal(bank.balanced, false);
+        assert.equal(bank.difference, -50);
+    });
+
+    test("a rake and a cash-out are counted apart", () => {
+        const state = table();
+        state.seats[0].stack = 350;
+        state.rakeTaken = 12;
+        state.seats[1].stack = 38;   // the rake came out of Ben's stack
+        HoldemState.cashOut(state, 0);
+        const bank = HoldemState.bankReconciliation(state);
+        assert.equal(bank.raked, 12);
+        assert.equal(bank.paidOut, 350);
+        assert.equal(bank.balanced, true);
+    });
+});
+
+describe("the record of their night", () => {
+    test("they stay in the standings with what they bought and what they left with", () => {
+        const state = table();
+        state.seats[0].stack = 350;
+        HoldemState.recordHand(state, [{ id: state.seats[0].id, label: "Ann", amount: 150 }]);
+        HoldemState.cashOut(state, 0);
+
+        const ann = HoldemState.sessionStandings(state).find(row => row.name === "Ann");
+        assert.ok(ann, "still on the list");
+        assert.equal(ann.boughtIn, 200);
+        assert.equal(ann.chipsInFront, 350, "what the box handed over");
+        assert.equal(ann.cashPosition, 150);
+        assert.equal(ann.cashedOut, true, "and marked, so nobody pays them twice");
+    });
+
+    test("somebody still sitting there is not marked", () => {
+        const state = table();
+        HoldemState.cashOut(state, 0);
+        const ben = HoldemState.sessionStandings(state).find(row => row.name === "Ben");
+        assert.equal(ben.cashedOut, false);
+    });
+
+    test("two people leaving are both kept", () => {
+        const state = table();
+        state.seats[0].stack = 350;
+        state.seats[1].stack = 50;
+        HoldemState.cashOut(state, 0);
+        HoldemState.cashOut(state, 1);
+        assert.equal(state.cashedOut.length, 2);
+        assert.equal(HoldemState.bankReconciliation(state).paidOut, 400);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+    });
+
+    test("a table saved before any of this existed has nobody cashed out", () => {
+        const parsed = JSON.parse(JSON.stringify(table()));
+        delete parsed.cashedOut;
+        const migrated = HoldemState.migrate(parsed);
+        assert.deepEqual(migrated.cashedOut, []);
+        assert.equal(HoldemState.bankReconciliation(migrated).paidOut, 0);
+    });
+
+    test("nonsense in a saved record is cleaned up rather than trusted", () => {
+        const parsed = JSON.parse(JSON.stringify(table()));
+        parsed.cashedOut = [
+            { id: "a", name: "Ann", buyIns: -5, chips: "350", at: "nope" },
+            { name: "no id" },
+            null,
+        ];
+        const migrated = HoldemState.migrate(parsed);
+        assert.equal(migrated.cashedOut.length, 1);
+        assert.equal(migrated.cashedOut[0].buyIns, 0);
+        assert.equal(migrated.cashedOut[0].chips, 350);
+        assert.equal(migrated.cashedOut[0].at, 0);
+    });
+});
+
+describe("the table carries on", () => {
+    test("the next hand deals round the empty chair", () => {
+        const state = table();
+        state.seats[0].stack = 350;
+        HoldemState.cashOut(state, 0);
+        HoldemState.startNextHand(state);
+        Betting.beginHand(state);
+
+        assert.equal(state.seats[0].inHand, false, "nobody is in the empty chair");
+        assert.equal(Betting.liveSeats(state).length, 3);
+        assert.ok(state.actingSeatIndex !== null, "somebody is on the clock");
+    });
+
+    test("and the money still adds up once it has", () => {
+        const state = table();
+        state.seats[0].stack = 350;
+        state.seats[1].stack = 50;
+        HoldemState.cashOut(state, 0);
+        HoldemState.startNextHand(state);
+        Betting.beginHand(state);
+        const bank = HoldemState.bankReconciliation(state);
+        assert.equal(Money.round(bank.chipsInPlay + bank.paidOut), bank.cashIn);
+        assert.equal(bank.balanced, true);
+    });
+});

tests/holdem/chipLegend.test.js

@@ -0,0 +1,183 @@
+// Taking a chip colour out of the legend.
+//
+// This was one click of an unlabelled 24px button, and it was not a change to a legend.
+// computeContribution() prices a seat by running the legend over that seat's chip
+// counts, so a colour that leaves takes every chip counted in it off the table.
+// Measured in a browser on a three-handed table: deleting the $500 row took $22,500 of
+// $26,874 with it, with no confirmation, nothing said afterwards, and no way back —
+// a colour added again is a new colour with a new id, while the counts stay keyed to
+// the one that left. The counts were left behind too, so the saved file carried money
+// that nothing could price and nothing could show.
+//
+// What is tested here is mostly the number in the warning, because a warning that
+// overstates is worse than none: it is the one thing a dealer would have to trust at
+// the exact moment they are about to lose track of the box.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { HoldemState, Money } = require("./load");
+
+const tableWith = ({ counts = [], overrides = [], basePot = null } = {}) => {
+    const state = HoldemState.createDefault();
+    HoldemState.resizeSeats(state, 9);
+    state.basePotAmount = basePot;
+    ["Christopher", "Mike from work", "Alexandra"].forEach((name, i) => {
+        state.seats[i].name = name;
+        state.seats[i].inHand = true;
+        state.seats[i].buyIns = 500;
+        state.seats[i].chipCounts = {};
+    });
+    counts.forEach(([seat, chipIndex, n]) => {
+        state.seats[seat].chipCounts[state.chipLegend[chipIndex].id] = n;
+    });
+    overrides.forEach(([seat, amount]) => { state.seats[seat].amountOverride = amount; });
+    return state;
+};
+
+const onTable = state => state.seats.reduce(
+    (sum, p) => sum + HoldemState.computeContribution(p, state.chipLegend, state.basePotAmount), 0);
+
+// ---------------------------------------------------------------------------
+
+describe("what a chip colour is holding up", () => {
+    test("is the money, named seat by seat", () => {
+        const state = tableWith({ counts: [[0, 2, 4], [1, 2, 10]] }); // the $25 chip
+        const usage = HoldemState.chipColorUsage(state, state.chipLegend[2].id);
+
+        assert.equal(usage.total, 350);
+        assert.equal(usage.chips, 14);
+        assert.deepEqual(usage.seats.map(s => [s.name, s.count, s.amount]), [
+            ["Christopher", 4, 100],
+            ["Mike from work", 10, 250],
+        ]);
+    });
+
+    test("is nothing at all for a colour nobody counted", () => {
+        const state = tableWith({ counts: [[0, 2, 4]] });
+        const usage = HoldemState.chipColorUsage(state, state.chipLegend[4].id);
+        assert.equal(usage.total, 0);
+        assert.deepEqual(usage.seats, []);
+        assert.ok(usage.chip, "the colour itself is still found, so it can be named");
+    });
+
+    test("and nothing for a colour that isn't there", () => {
+        const state = tableWith();
+        assert.deepEqual(HoldemState.chipColorUsage(state, "no-such-chip"),
+            { chip: null, total: 0, chips: 0, seats: [] });
+    });
+});
+
+describe("the number in the warning is the number the table loses", () => {
+    // The whole point. Multiplying the chips by their value would have been the obvious
+    // way to work this out and it is wrong in both directions — the two tests below are
+    // the two ways it is wrong.
+    const dropFromRemoving = (state, chipId) => {
+        const before = onTable(state);
+        HoldemState.removeChipColor(state, chipId);
+        return Money.round(before - onTable(state));
+    };
+
+    test("a seat with a typed amount ignores its chips, so its colour is worth nothing", () => {
+        // computeContribution() reads amountOverride first and never reaches the counts.
+        // Christopher is holding ten $25 chips on paper and priced at a flat $90.
+        const state = tableWith({ counts: [[0, 2, 10]], overrides: [[0, 90]] });
+        const chipId = state.chipLegend[2].id;
+
+        const usage = HoldemState.chipColorUsage(state, chipId);
+        assert.equal(usage.total, 0, "$250 of chips, but the seat is not priced from them");
+        assert.equal(dropFromRemoving(state, chipId), 0);
+    });
+
+    test("a seat whose chips all leave falls back to the base pot, not to zero", () => {
+        // The $25s are everything Christopher has counted, so taking them away drops him
+        // to the table's standing ante — a loss of 50, not of 250.
+        const state = tableWith({ counts: [[0, 2, 10]], basePot: 200 });
+        const chipId = state.chipLegend[2].id;
+
+        const usage = HoldemState.chipColorUsage(state, chipId);
+        assert.equal(usage.total, 50, "250 of chips, but only 50 of it actually leaves");
+        assert.equal(dropFromRemoving(state, chipId), 50);
+    });
+
+    test("and across a spread of tables the two always agree", () => {
+        function rng(seed) {
+            let s = seed >>> 0;
+            return () => {
+                s = (s * 1664525 + 1013904223) >>> 0;
+                return s / 4294967296;
+            };
+        }
+        const random = rng(20260906);
+        let withMoney = 0;
+
+        for (let table = 0; table < 2000; table++) {
+            const counts = [];
+            for (let seat = 0; seat < 3; seat++) {
+                for (let chip = 0; chip < 5; chip++) {
+                    if (random() < 0.5) counts.push([seat, chip, 1 + Math.floor(random() * 20)]);
+                }
+            }
+            const overrides = [];
+            for (let seat = 0; seat < 3; seat++) {
+                if (random() < 0.25) overrides.push([seat, Math.floor(random() * 400)]);
+            }
+            const basePot = random() < 0.5 ? 200 : null;
+
+            const chipIndex = Math.floor(random() * 5);
+            const stated = tableWith({ counts, overrides, basePot });
+            const chipId = stated.chipLegend[chipIndex].id;
+            const claimed = HoldemState.chipColorUsage(stated, chipId).total;
+
+            const actual = dropFromRemoving(tableWith({ counts, overrides, basePot }), chipId);
+            if (claimed !== 0) withMoney++;
+            assert.equal(claimed, actual,
+                `table ${table}: warned ${claimed}, table moved ${actual}\n` +
+                JSON.stringify({ counts, overrides, basePot, chipIndex }));
+        }
+
+        // Guards the generator: shapes that never put money on a colour would make every
+        // assertion above compare zero with zero.
+        assert.ok(withMoney > 500, `only ${withMoney} of 2000 tables had money on the colour`);
+    });
+
+    test("and it can be a gain, which is said as one", () => {
+        // Fourteen $1 chips against a $200 standing ante: once the colour goes, the seat
+        // stops being priced from its chips and falls through to the ante, so the table
+        // goes *up* by 186. Found by the randomised check above, not by hand.
+        const state = tableWith({ counts: [[1, 0, 14]], basePot: 200 });
+        const usage = HoldemState.chipColorUsage(state, state.chipLegend[0].id);
+        assert.equal(usage.total, -186);
+        assert.equal(dropFromRemoving(state, state.chipLegend[0].id), -186);
+    });
+});
+
+describe("removing it", () => {
+    test("takes the counts with it, so nothing is left priced by a colour that is gone", () => {
+        const state = tableWith({ counts: [[0, 2, 4], [1, 2, 10], [1, 0, 3]] });
+        const chipId = state.chipLegend[2].id;
+
+        HoldemState.removeChipColor(state, chipId);
+
+        assert.equal(state.chipLegend.filter(c => c.id === chipId).length, 0);
+        state.seats.forEach(player => assert.ok(!(chipId in (player.chipCounts || {})),
+            "a count against a colour no legend entry answers to is money nothing can show"));
+        // The other colour on that seat is untouched.
+        assert.equal(state.seats[1].chipCounts[state.chipLegend[0].id], 3);
+    });
+
+    test("reports what it cost, measured before anything moved", () => {
+        const state = tableWith({ counts: [[0, 2, 4]] });
+        const usage = HoldemState.removeChipColor(state, state.chipLegend[2].id);
+        assert.equal(usage.total, 100);
+        assert.equal(usage.seats.length, 1);
+    });
+
+    test("and a colour that isn't there changes nothing", () => {
+        const state = tableWith({ counts: [[0, 2, 4]] });
+        const before = onTable(state);
+        const usage = HoldemState.removeChipColor(state, "no-such-chip");
+        assert.equal(usage.chip, null);
+        assert.equal(state.chipLegend.length, 5);
+        assert.equal(onTable(state), before);
+    });
+});

tests/holdem/designTokens.test.js

@@ -0,0 +1,164 @@
+// The stylesheet has to keep picking from the scales.
+//
+// Before the token block went in, holdem.css used 42 different spacing values, 31 font
+// sizes, 14 border-radii and 139 colours, and defined three custom properties. None of
+// that was anybody's decision — each number was chosen at the moment it was needed, and
+// the result read as crowded even where nothing overlapped, because a 0.42rem gap next
+// to a 0.45rem gap next to a 0.5rem gap gives the eye no rhythm to lock onto.
+//
+// A one-off cleanup would last until the next `padding: 0.35rem`. So the scales are
+// checked here instead: a new value has to be a step on one of them, or an exception
+// with a reason written next to it.
+//
+// This reads the stylesheet as text rather than through a CSS parser, on purpose — the
+// rest of this suite has no dependencies and runs in a second, and a regex over
+// declarations is enough to catch the thing that actually happens, which is somebody
+// (me) typing a number instead of reaching for a token.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
+
+const CSS_PATH = path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "css", "casino", "holdem.css");
+const css = fs.readFileSync(CSS_PATH, "utf8");
+
+// Comments carry measurements and rationale — "measured at 342px tall on a phone" —
+// and none of that is a declaration. Strip them before looking for values.
+const declarations = css.replace(/\/\*[\s\S]*?\*\//g, "");
+
+// Everything after the token block. The :root block is where the raw values are
+// supposed to be.
+const body = declarations.slice(declarations.indexOf("#potBadgeAmount,"));
+
+const valuesIn = (properties, source = body) => {
+    const found = [];
+    // The lookbehind rejects a hyphen as well as a word character, so `scroll-padding`
+    // isn't read as `padding`. It caught the pot wizard's scroll-padding the moment
+    // that went in — correctly by its own rules, wrongly in substance: those two values
+    // are the measured heights of the dialog's sticky header and footer, a clearance
+    // like the action bar's, not a step in the spacing rhythm.
+    const re = new RegExp(`(?<![\\w-])(${properties.join("|")})\\s*:([^;}]*)`, "g");
+    let m;
+    while ((m = re.exec(source)) !== null) {
+        const [, prop, value] = m;
+        // calc() and env() do their own arithmetic on tokens; the tokens inside them
+        // are still checked, because the regex below looks at bare numbers only.
+        (value.match(/(?<![\w-])[0-9.]+(rem|px|em)\b/g) || []).forEach(v => found.push({ prop, value: v }));
+    }
+    return found;
+};
+
+describe("the spacing scale", () => {
+    // Hairlines and structural clearances, each one deliberate:
+    //   0px/1px/3px/4px/22px — borders, hairline offsets, and the 22px of room a seat
+    //                          puck's name gives the dealer button beside it.
+    //   5rem/9rem            — how far the page has to scroll past the fixed action
+    //                          bar. Not rhythm; clearance for a thing of a known size.
+    const ALLOWED = new Set(["0px", "1px", "2px", "3px", "4px", "22px", "5rem", "9rem"]);
+
+    test("every gap, margin and padding comes off the scale", () => {
+        const offenders = valuesIn(
+            ["padding", "padding-top", "padding-right", "padding-bottom", "padding-left",
+             "margin", "margin-top", "margin-right", "margin-bottom", "margin-left",
+             "gap", "row-gap", "column-gap"])
+            .filter(v => !ALLOWED.has(v.value));
+
+        assert.deepEqual(offenders, [],
+            "use var(--sp-0 … --sp-6), or add the value to ALLOWED with a reason");
+    });
+
+    test("and the scale is the one the tokens define", () => {
+        ["--sp-0", "--sp-1", "--sp-2", "--sp-3", "--sp-4", "--sp-5", "--sp-6"]
+            .forEach(token => assert.match(css, new RegExp(`\\${token}:`), `${token} is not defined`));
+    });
+});
+
+describe("the type scale", () => {
+    //   16px  — the size below which iOS zooms the page when a field is focused, so
+    //           every text input states it. Not a typographic choice.
+    //   1.05em, 0.44rem — relative bumps inside a component, and the shrink-to-fit for
+    //           a six-figure stack on a 58px seat puck.
+    const ALLOWED = new Set(["16px", "1.05em", "0.44rem"]);
+
+    test("every font-size comes off the scale", () => {
+        const offenders = valuesIn(["font-size"]).filter(v => !ALLOWED.has(v.value));
+        assert.deepEqual(offenders, [],
+            "use var(--fs-2xs … --fs-2xl), or add the value to ALLOWED with a reason");
+    });
+
+    test("and the scale is the one the tokens define", () => {
+        ["--fs-2xs", "--fs-xs", "--fs-sm", "--fs-base", "--fs-md", "--fs-lg", "--fs-xl", "--fs-2xl"]
+            .forEach(token => assert.match(css, new RegExp(`\\${token}:`), `${token} is not defined`));
+    });
+});
+
+describe("the corner scale", () => {
+    test("every border-radius comes off it", () => {
+        const offenders = valuesIn(["border-radius"]).filter(v => v.value !== "2px");
+        assert.deepEqual(offenders, [], "use var(--r-sm | --r-md | --r-lg | --r-pill)");
+    });
+});
+
+describe("the tokens themselves", () => {
+    test("every var() the stylesheet reaches for exists", () => {
+        const used = new Set((css.match(/var\((--[a-zA-Z0-9-]+)/g) || []).map(s => s.slice(4)));
+        // Published from JS at runtime rather than declared here — see actionBar.js for
+        // the first two, render.js for the seat width and the chip's denomination colour,
+        // which is picked per chip from the amount on it, and feedback.js for the
+        // toast's height, which is one line or two depending on what is being said.
+        // The seat sheet's height is the same idea as the action bar's, and for the same
+        // reason: two things fixed to the bottom of a phone, and the toast has to clear
+        // whichever is taller. It changes when a section of the sheet is unfolded, so it
+        // is measured rather than written down — see Render.watchSeatSheetHeight.
+        const fromScript = new Set([
+            "--actionBarHeight", "--feltRoomPx", "--seatPuckW", "--betChipColour",
+            "--toastHeight", "--seatSheetHeight",
+        ]);
+        // Defined by the site's own stylesheet, not this one.
+        const fromSite = new Set(["--font-mono"]);
+        const missing = [...used].filter(t =>
+            !fromScript.has(t) && !fromSite.has(t) && !new RegExp(`\\${t}\\s*:`).test(css));
+        assert.deepEqual(missing, []);
+    });
+
+    test("and the dark surfaces stay off pure black", () => {
+        // Shadows are invisible on #000, so depth has to come from a lighter surface —
+        // and white text on true black is the pairing that smears on an OLED phone,
+        // which is what this tool is used on.
+        const surfaces = [...css.matchAll(/--surface-\d+:\s*(#[0-9a-fA-F]{3,8})/g)].map(m => m[1].toLowerCase());
+        assert.ok(surfaces.length >= 4, "the surface ramp should have four steps");
+        surfaces.forEach(hex => {
+            assert.notEqual(hex, "#000");
+            assert.notEqual(hex, "#000000");
+        });
+    });
+});
+
+describe("numbers that change while the dealer watches", () => {
+    test("are set in tabular figures", () => {
+        // A "1" is narrower than an "8" in a proportional face, so a pot ticking from
+        // $18 to $21 shuffles its digits sideways and the eye reads movement where
+        // there is only arithmetic.
+        assert.match(css, /font-variant-numeric:\s*tabular-nums/);
+        ["#potBadgeAmount", ".seatPuckStack", ".actionPot", ".standingsRow"]
+            .forEach(sel => assert.ok(css.includes(sel),
+                `${sel} should be in the tabular-figures list`));
+    });
+});
+
+describe("controls that must not resize under a thumb", () => {
+    test("the undo pill has a fixed width, not a content width", () => {
+        // It names the last action, so its label changes on every tap. Measured across
+        // one hand before this: 148, 110, 109, 108, 109, 110, 120.
+        const rule = css.match(/\.actionUndo\s*\{[^}]*\}/);
+        assert.ok(rule, ".actionUndo rule not found");
+        assert.match(rule[0], /width:\s*[0-9.]+rem/);
+    });
+
+    test("and its label is the part that ellipsizes", () => {
+        const rule = css.match(/\.actionUndoLabel\s*\{[^}]*\}/);
+        assert.ok(rule, ".actionUndoLabel rule not found");
+        assert.match(rule[0], /text-overflow:\s*ellipsis/);
+    });
+});

tests/holdem/feltRoom.test.js

@@ -71,3 +71,74 @@ describe("a window with room to spare", () => {
         assert.equal(room(844.4, 127.6, 223.2) % 1, 0);
     });
 });
+
+describe("when the felt changes size, so does everything on it", () => {
+    // The felt is published as a custom property and the seats follow it on their own,
+    // because they are placed in percentages of it. A bet chip anchored inside a seat
+    // is not: it is placed in pixels off that seat's centre, worked out against the felt
+    // as it was, and nothing re-ran that when the felt moved.
+    //
+    // Measured at 640x360 with five players, on a felt that lost 23px of height: the
+    // chips were positioned for the old one and painted on the new, and seat 3's $5 came
+    // to rest on seat 4's puck. The seat pucks had the same problem — they are searched
+    // for a width the felt no longer has — and two pairs of them were overlapping.
+    //
+    // A side pot appearing does this too: it is 55px off the felt, mid-hand.
+    const fakeDom = (windowHeight = 900) => {
+        const root = { style: { values: {},
+            setProperty(k, v) { this.values[k] = v; },
+            getPropertyValue(k) { return this.values[k] || ""; } } };
+        global.document = {
+            documentElement: root,
+            getElementById: id => (id === "pokerTableWrap"
+                ? { getBoundingClientRect: () => ({ top: 146 }) }
+                : null),
+        };
+        global.window = { innerHeight: windowHeight, scrollY: 0 };
+        return root;
+    };
+
+    const spyRender = () => {
+        const calls = { density: 0, seats: 0 };
+        global.Render = {
+            state: {},
+            updateSeatDensity() { calls.density++; },
+            renderSeats() { calls.seats++; },
+        };
+        return calls;
+    };
+
+    test.afterEach(() => {
+        delete global.document;
+        delete global.window;
+        delete global.Render;
+    });
+
+    test("a felt that changed height lays the seats out again", () => {
+        fakeDom();
+        const calls = spyRender();
+        ActionBar.publishFeltRoom(117);
+        assert.equal(calls.seats, 1, "first publish sets a height it did not have");
+
+        ActionBar.publishFeltRoom(172);
+        assert.equal(calls.seats, 2, "and a side pot grew the bar by 55px");
+    });
+
+    test("a felt that did not change is left alone", () => {
+        fakeDom();
+        const calls = spyRender();
+        ActionBar.publishFeltRoom(117);
+        ActionBar.publishFeltRoom(117);
+        ActionBar.publishFeltRoom(117);
+        assert.equal(calls.seats, 1,
+            "re-laying the table on every resize tick would be work for nothing");
+        assert.equal(calls.density, 3, "the cheap re-measure still runs each time");
+    });
+
+    test("it publishes the height whether or not anything is listening", () => {
+        const root = fakeDom();
+        delete global.Render;
+        assert.doesNotThrow(() => ActionBar.publishFeltRoom(117));
+        assert.match(root.style.getPropertyValue("--feltRoomPx"), /^\d+px$/);
+    });
+});

tests/holdem/feltShape.test.js

@@ -0,0 +1,165 @@
+// What shape the felt ends up, which is a question about which rule wins.
+//
+// feltRoom.test.js covers how much room there is. This covers what the stylesheet does
+// with it, and it exists because of a bug that no amount of reading caught: the upright
+// oval for phones was written into the `max-width: 700px` block, and the `max-width:
+// 900px` block below it set the same custom property back to 1. Both queries match a
+// phone, the two declarations have identical specificity, and the later one wins. The
+// rule was correct, the arithmetic was correct, and the property was 1 on every phone
+// on the site. It measured as a no-op and would have shipped as one.
+//
+// So this walks the media queries the way the cascade does — in source order, keeping
+// the last one that matches — instead of trusting that a rule written for a viewport is
+// the rule that viewport gets.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
+
+const CSS = fs.readFileSync(
+    path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "css", "casino", "holdem.css"), "utf8");
+
+// Comments carry example numbers and at least one worked-through `--feltAspect: 1`, so
+// they come out before anything here counts declarations.
+const SOURCE = CSS.replace(/\/\*[\s\S]*?\*\//g, "");
+
+// --- just enough of a media query engine to answer "does this viewport match?" -------
+//
+// Only the forms this stylesheet actually uses: width and height bounds, orientation,
+// and `and` between them. Anything else is refused loudly rather than guessed at, so a
+// new kind of query can't quietly start matching everything.
+const matches = (condition, view) => {
+    if (!condition) return true;
+    return condition.split(/\s+and\s+/).every(part => {
+        const m = part.trim().match(/^\(\s*([a-z-]+)\s*:\s*([^)]+?)\s*\)$/);
+        assert.ok(m, `feltShape can't read the query "${part}" — teach it or simplify the CSS`);
+        const [, feature, raw] = m;
+        const px = parseFloat(raw);
+        switch (feature) {
+            case "min-width": return view.width >= px;
+            case "max-width": return view.width <= px;
+            case "min-height": return view.height >= px;
+            case "max-height": return view.height <= px;
+            case "orientation":
+                return raw === (view.width > view.height ? "landscape" : "portrait");
+            default:
+                assert.fail(`feltShape doesn't know the media feature "${feature}"`);
+        }
+    });
+};
+
+// Every style rule in the file, in source order, with the media condition it sits
+// under. Written as a brace walk rather than a regex because a regex for `max-height`
+// also finds it in `@media (orientation: landscape) and (max-height: 560px)`, and a
+// media feature is not a declaration.
+const rules = () => {
+    const out = [];
+    const open = [];
+    let prelude = "", i = 0;
+    while (i < SOURCE.length) {
+        const c = SOURCE[i];
+        if (c === "{") {
+            const head = prelude.trim();
+            prelude = "";
+            if (head.startsWith("@")) { open.push(head); i++; continue; }
+            let depth = 1, j = i + 1;
+            while (j < SOURCE.length && depth > 0) {
+                if (SOURCE[j] === "{") depth++;
+                else if (SOURCE[j] === "}") depth--;
+                j++;
+            }
+            const media = open.filter(h => h.startsWith("@media"))
+                .map(h => h.replace(/^@media\s*/, "")).join(" and ");
+            out.push({ selector: head, condition: media || null, body: SOURCE.slice(i + 1, j - 1) });
+            i = j;
+            continue;
+        }
+        if (c === "}") { open.pop(); prelude = ""; i++; continue; }
+        prelude += c;
+        i++;
+    }
+    return out;
+};
+
+const ALL_RULES = rules();
+
+// The cascade, for equal-specificity declarations of one property on one selector: the
+// last one whose query matches is the one the viewport gets.
+const winnerAt = (selector, prop, view) => {
+    const winning = ALL_RULES
+        .filter(r => r.selector === selector && matches(r.condition, view))
+        .map(r => r.body.match(new RegExp(`(?:^|;)\\s*${prop}\\s*:\\s*([^;]+)`)))
+        .filter(Boolean)
+        .pop();
+    assert.ok(winning, `nothing sets ${prop} on ${selector} at ${view.width}x${view.height}`);
+    return winning[1].trim();
+};
+
+const PHONES = [
+    { width: 360, height: 640, name: "Galaxy S8" },
+    { width: 375, height: 667, name: "iPhone SE" },
+    { width: 390, height: 844, name: "iPhone 14" },
+    { width: 412, height: 915, name: "Pixel 7" },
+    { width: 430, height: 932, name: "Pro Max" },
+];
+
+// ---------------------------------------------------------------------------
+
+describe("the shape a phone gets", () => {
+    test("is an oval standing up, on every one of them", () => {
+        PHONES.forEach(phone => {
+            const aspect = parseFloat(winnerAt("#pokerTableWrap", "--feltAspect", phone));
+            assert.ok(aspect > 1.2,
+                `${phone.name} lands on --feltAspect: ${aspect}. A portrait phone is ` +
+                `tall and this is what uses it; anything at or under 1 is the square ` +
+                `felt that threw the room away.`);
+        });
+    });
+
+    test("and a wide screen still gets one lying down", () => {
+        // The desktop felt is the shape it always was. Whatever the phones do, this is
+        // the one a poker table looks like when there is room for it.
+        assert.equal(parseFloat(winnerAt("#pokerTableWrap", "--feltAspect", { width: 1280, height: 900 })), 0.72);
+    });
+
+    test("with the middle widths in between left round", () => {
+        // 701-900px is one column and wide enough that neither oval is called for. It
+        // has to be written as a range: a bare max-width would match the phones too and,
+        // sitting lower in the file, would win there.
+        [{ width: 768, height: 1024 }, { width: 900, height: 700 }].forEach(view => {
+            assert.equal(parseFloat(winnerAt("#pokerTableWrap", "--feltAspect", view)), 1);
+        });
+    });
+});
+
+describe("what stops the oval", () => {
+    const phoneRule = winnerAt("#pokerTableWrap", "max-height", { width: 390, height: 844 });
+
+    test("is the room and nothing but the room", () => {
+        // The oval is a preference and the room is a fact. Whatever shape is asked for
+        // above, the felt gives way to the measurement rather than the other way round,
+        // because the thing on the other side of the cap is a seat behind the action bar.
+        assert.equal(phoneRule, "var(--feltRoomPx, 100vh)");
+    });
+
+    test("and it is not floored, however tempting that is", () => {
+        // A floor at the desktop oval — max(var(--feltRoomPx), 72cqw) — was written here
+        // and measured out again. Twelve players all in with nine side pots is the
+        // tallest the bar gets, 341px, and at 360x640 that leaves 142px of room. Floored
+        // to 242 the felt keeps its shape and hides five of the twelve seats behind the
+        // bar. Unfloored at 142 it is flat and all twelve are visible.
+        //
+        // The slit it was defending against wasn't reachable: that came from forcing
+        // --feltRoomPx to 10px by hand, and the real floor is FELT_FLOOR_PX at 96.
+        assert.doesNotMatch(phoneRule, /max\(/,
+            "a floor here trades a flat table for a covered seat, which is the worse of " +
+            "the two — see the comment above the rule");
+    });
+
+    test("and the width is let go of, so the height can be the one that binds", () => {
+        // The wide layout sizes the felt from its width and caps that. On a phone the
+        // width is the column and the height is what's scarce, so the cap moves.
+        assert.equal(winnerAt("#pokerTableWrap", "max-width", { width: 390, height: 844 }), "none");
+    });
+});

tests/holdem/handRank.test.js

@@ -0,0 +1,415 @@
+// What beats what.
+//
+// This is the one module in the tool that can pay the wrong person without anybody
+// noticing. A pot wizard that asks "who won?" is only ever as wrong as the dealer
+// ticking the box; one that answers the question itself is wrong on its own account,
+// silently, and a table that has come to trust it will not check. So the ordering is
+// tested from both ends: every category against every other, the traps that a
+// hand-rolled evaluator gets wrong (the wheel, the counterfeited kicker, the board
+// that plays), and then a lot of random seven-card hands against a second
+// implementation written a different way.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { HandRank } = require("./load");
+
+const best = (...cards) => HandRank.best(cards.flat());
+const beats = (a, b) => HandRank.compare(a, b) > 0;
+const chops = (a, b) => HandRank.compare(a, b) === 0;
+
+// A hand written as one string, for the tests that list a lot of them.
+const hand = str => str.trim().split(/\s+/);
+
+describe("the five-card hand", () => {
+    const of = str => HandRank.evaluate5(hand(str));
+
+    test("each category is recognised", () => {
+        const cases = [
+            ["AS KS QS JS TS", HandRank.STRAIGHT_FLUSH, "Royal flush"],
+            ["9H 8H 7H 6H 5H", HandRank.STRAIGHT_FLUSH, "Straight flush, nine high"],
+            ["7C 7D 7H 7S 2C", HandRank.FOUR_OF_A_KIND, "Four of a kind, sevens"],
+            ["KC KD KH 3S 3C", HandRank.FULL_HOUSE, "Full house, kings full of threes"],
+            ["AD JD 8D 5D 2D", HandRank.FLUSH, "Flush, ace high"],
+            ["9C 8D 7H 6S 5C", HandRank.STRAIGHT, "Straight, nine high"],
+            ["QC QD QH 7S 2C", HandRank.THREE_OF_A_KIND, "Three of a kind, queens"],
+            ["AC AD 8H 8S 4C", HandRank.TWO_PAIR, "Two pair, aces and eights"],
+            ["QC QD 9H 5S 2C", HandRank.ONE_PAIR, "Pair of queens"],
+            ["AC JD 8H 5S 2C", HandRank.HIGH_CARD, "Ace high"],
+        ];
+        cases.forEach(([cards, category, described]) => {
+            const ranked = of(cards);
+            assert.equal(ranked.category, category, cards);
+            assert.equal(HandRank.describe(ranked), described, cards);
+        });
+    });
+
+    test("the categories are in the right order", () => {
+        // Listed weakest first, then every pair checked both ways round. The order
+        // itself is the thing being asserted, so it is written out rather than derived
+        // from the constants it is meant to be checking.
+        const ladder = [
+            "AC JD 8H 5S 2C",   // ace high
+            "2C 2D 8H 5S 3C",   // a pair of deuces
+            "AC AD 8H 8S 4C",   // two pair
+            "3C 3D 3H 7S 2C",   // trips
+            "9C 8D 7H 6S 5C",   // straight
+            "AD JD 8D 5D 2D",   // flush
+            "2C 2D 2H 3S 3C",   // full house
+            "7C 7D 7H 7S 2C",   // quads
+            "9H 8H 7H 6H 5H",   // straight flush
+        ];
+        for (let low = 0; low < ladder.length; low++) {
+            for (let high = low + 1; high < ladder.length; high++) {
+                assert.ok(beats(of(ladder[high]), of(ladder[low])),
+                    `${ladder[high]} should beat ${ladder[low]}`);
+                assert.ok(!beats(of(ladder[low]), of(ladder[high])),
+                    `${ladder[low]} should not beat ${ladder[high]}`);
+            }
+        }
+    });
+
+    test("the same hand in different suits is a chop", () => {
+        assert.ok(chops(of("AC KD 8H 5S 2C"), of("AS KH 8D 5C 2H")));
+        assert.ok(chops(of("QC QD 9H 5S 2C"), of("QH QS 9D 5C 2H")));
+    });
+
+    test("nothing but five real cards is a hand", () => {
+        assert.equal(HandRank.evaluate5(hand("AC KD 8H 5S")), null, "four");
+        assert.equal(HandRank.evaluate5(hand("AC KD 8H 5S 2C 3D")), null, "six");
+        assert.equal(HandRank.evaluate5(["AC", "KD", "8H", "5S", "ZZ"]), null, "nonsense");
+        assert.equal(HandRank.evaluate5(["AC", "KD", "8H", "5S", ""]), null, "an empty slot");
+        assert.equal(HandRank.evaluate5(null), null);
+    });
+
+    test("case does not matter, because the picker is not the only way cards get in", () => {
+        assert.ok(chops(of("ac kd 8h 5s 2c"), of("AC KD 8H 5S 2C")));
+    });
+});
+
+describe("the wheel", () => {
+    const of = str => HandRank.evaluate5(hand(str));
+
+    // The straight that runs through the ace at the bottom. An evaluator that scores a
+    // straight by its top card and lets the ace keep its usual value makes A-2-3-4-5
+    // the best straight there is instead of the worst — which pays the wrong player
+    // every time it comes up against a broadway.
+    test("A-2-3-4-5 is a straight", () => {
+        assert.equal(of("AC 2D 3H 4S 5C").category, HandRank.STRAIGHT);
+        assert.equal(HandRank.describe(of("AC 2D 3H 4S 5C")), "Straight, five high");
+    });
+
+    test("and it is the lowest one", () => {
+        assert.ok(beats(of("6C 5D 4H 3S 2C"), of("AC 2D 3H 4S 5C")),
+            "six high beats the wheel");
+        assert.ok(beats(of("AC KD QH JS TC"), of("AC 2D 3H 4S 5C")),
+            "broadway beats the wheel");
+    });
+
+    test("the same goes for a steel wheel", () => {
+        const steel = of("AH 2H 3H 4H 5H");
+        assert.equal(steel.category, HandRank.STRAIGHT_FLUSH);
+        assert.equal(HandRank.describe(steel), "Straight flush, five high");
+        assert.ok(beats(of("6H 5H 4H 3H 2H"), steel));
+        assert.ok(beats(of("AS KS QS JS TS"), steel));
+    });
+
+    test("an ace with a four-card run either side of it is not a straight", () => {
+        // K-A-2-3-4 does not wrap.
+        assert.equal(of("KC AD 2H 3S 4C").category, HandRank.HIGH_CARD);
+        assert.equal(of("QC KD AH 2S 3C").category, HandRank.HIGH_CARD);
+    });
+});
+
+describe("kickers", () => {
+    const of = str => HandRank.evaluate5(hand(str));
+
+    test("the fifth card settles two pair", () => {
+        assert.ok(beats(of("AC AD 8H 8S KC"), of("AH AS 8D 8C QC")));
+        assert.ok(chops(of("AC AD 8H 8S KC"), of("AH AS 8D 8C KD")));
+    });
+
+    test("and a pair, three kickers deep", () => {
+        assert.ok(beats(of("9C 9D AH 7S 2C"), of("9H 9S KD 7C 2D")), "first kicker");
+        assert.ok(beats(of("9C 9D AH 7S 2C"), of("9H 9S AD 6C 2D")), "second");
+        assert.ok(beats(of("9C 9D AH 7S 3C"), of("9H 9S AD 7C 2D")), "third");
+    });
+
+    test("the higher pair beats the better kicker", () => {
+        assert.ok(beats(of("TC TD 3H 2S 4C"), of("9C 9D AH KS QC")));
+    });
+
+    test("two pair is read by its higher pair first", () => {
+        assert.ok(beats(of("KC KD 2H 2S 3C"), of("QC QD JH JS AC")));
+    });
+
+    test("a full house is read by its trips first", () => {
+        assert.ok(beats(of("3C 3D 3H 2S 2C"), of("2D 2H 2C AS AD")));
+    });
+
+    test("a flush is read all the way down", () => {
+        assert.ok(beats(of("AD KD 8D 5D 3D"), of("AH KH 8H 5H 2H")));
+        assert.ok(chops(of("AD KD 8D 5D 3D"), of("AH KH 8H 5H 3H")));
+    });
+});
+
+describe("the best five out of seven", () => {
+    test("it finds the flush the two hole cards do not both belong to", () => {
+        const ranked = best(["AH", "2C"], ["KH", "QH", "7H", "3H", "9S"]);
+        assert.equal(ranked.category, HandRank.FLUSH);
+        assert.equal(HandRank.describe(ranked), "Flush, ace high");
+    });
+
+    test("it plays the board when the board is better than anything you hold", () => {
+        // Nobody can beat a royal on the board; both hands are the board itself.
+        const board = ["AS", "KS", "QS", "JS", "TS"];
+        const one = best(["2C", "3D"], board);
+        const two = best(["7H", "8H"], board);
+        assert.equal(HandRank.describe(one), "Royal flush");
+        assert.ok(chops(one, two), "the board plays, so it is a chop");
+    });
+
+    test("it does not use three hole cards, because there are only two", () => {
+        const ranked = best(["AC", "AD"], ["AH", "KS", "KD", "2C", "3H"]);
+        assert.equal(HandRank.describe(ranked), "Full house, aces full of kings");
+    });
+
+    test("a counterfeited two pair falls back on the board", () => {
+        // Holding 6-5 on a board of 8-8-K-K-A: the player's two pair is counterfeited —
+        // the best five are the board's two pair with the ace, and the sixes never play.
+        const ranked = best(["6C", "5D"], ["8H", "8S", "KC", "KD", "AC"]);
+        assert.equal(HandRank.describe(ranked), "Two pair, kings and eights");
+        assert.deepEqual([...ranked.cards].sort(), ["8H", "8S", "AC", "KC", "KD"].sort());
+    });
+
+    test("five, six and seven cards are all rankable; four is not", () => {
+        assert.ok(best(["AC", "KD"], ["QH", "JS", "TC"]), "five");
+        assert.ok(best(["AC", "KD"], ["QH", "JS", "TC", "2D"]), "six");
+        assert.ok(best(["AC", "KD"], ["QH", "JS", "TC", "2D", "3H"]), "seven");
+        assert.equal(best(["AC", "KD"], ["QH", "JS"]), null, "four");
+    });
+
+    test("the same card twice is not a hand", () => {
+        // A mis-entry, not a monster. Ranking it would mean ranking a deck that does
+        // not exist, and the answer would look exactly as confident as a real one.
+        assert.equal(best(["AC", "AC"], ["KH", "QS", "JD", "2C", "3H"]), null);
+        assert.equal(best(["AC", "KD"], ["KD", "QS", "JD", "2C", "3H"]), null);
+    });
+});
+
+describe("the showdown", () => {
+    const board = ["AH", "KD", "9C", "4S", "2H"];
+
+    test("it names one winner and says how it read every hand", () => {
+        const result = HandRank.showdown(board, [
+            { id: "a", cards: ["AS", "KC"] },   // two pair, aces and kings
+            { id: "b", cards: ["9H", "9S"] },   // trips
+            { id: "c", cards: ["AC", "3D"] },   // a pair of aces
+        ]);
+        assert.equal(result.complete, true);
+        assert.deepEqual(result.winners, ["b"]);
+        assert.deepEqual(result.players.map(p => p.place), [2, 1, 3]);
+        assert.deepEqual(result.players.map(p => HandRank.describe(p.hand)), [
+            "Two pair, aces and kings",
+            "Three of a kind, nines",
+            "Pair of aces",
+        ]);
+    });
+
+    test("a chop comes back as two winners on the same place", () => {
+        const result = HandRank.showdown(board, [
+            { id: "a", cards: ["AS", "QC"] },
+            { id: "b", cards: ["AD", "QH"] },
+            { id: "c", cards: ["7H", "5S"] },
+        ]);
+        assert.deepEqual(result.winners.sort(), ["a", "b"]);
+        assert.deepEqual(result.players.map(p => p.place), [1, 1, 3],
+            "and the player behind them is third, not second");
+    });
+
+    test("an incomplete board is not a showdown", () => {
+        const result = HandRank.showdown(["AH", "KD", "9C"], [
+            { id: "a", cards: ["AS", "KC"] },
+            { id: "b", cards: ["9H", "9S"] },
+        ]);
+        assert.equal(result.boardComplete, false);
+        assert.equal(result.complete, false);
+        assert.deepEqual(result.winners, [], "it must not name one");
+    });
+
+    test("one unknown hand and it will not say who won", () => {
+        // Who is *ahead* and who *won* are different claims, and the second one is the
+        // only one that can pay somebody. A player who never turned their cards over
+        // could have anything.
+        const result = HandRank.showdown(board, [
+            { id: "a", cards: ["AS", "KC"] },
+            { id: "b", cards: ["", ""] },
+        ]);
+        assert.equal(result.complete, false);
+        assert.deepEqual(result.winners, []);
+        assert.deepEqual(result.unknown, ["b"]);
+        assert.ok(result.players[0].hand, "but it still reads the hands it can");
+        assert.equal(result.players[1].hand, null);
+    });
+
+    test("a card in two places stops it dead", () => {
+        const result = HandRank.showdown(board, [
+            { id: "a", cards: ["AH", "KC"] },   // the ace of hearts is on the board
+            { id: "b", cards: ["9H", "9S"] },
+        ]);
+        assert.equal(result.duplicated, true);
+        assert.equal(result.complete, false);
+        assert.deepEqual(result.winners, []);
+    });
+
+    test("no players at all is not a showdown either", () => {
+        const result = HandRank.showdown(board, []);
+        assert.equal(result.complete, false);
+        assert.deepEqual(result.winners, []);
+    });
+});
+
+describe("against a second opinion", () => {
+    // The strongest check available without a poker library: a completely separate
+    // ranking, written the other way round — every hand turned into a sortable string
+    // by counting ranks, with no shared helper between it and the module. Where the two
+    // disagree, one of them is wrong and the test says which hand it was.
+    const VALUE = { T: 10, J: 11, Q: 12, K: 13, A: 14 };
+    const val = card => VALUE[card[0]] || Number(card[0]);
+
+    function reference5(cards) {
+        const ranks = cards.map(val).sort((x, y) => y - x);
+        const suited = new Set(cards.map(c => c[1])).size === 1;
+
+        const tally = {};
+        ranks.forEach(r => { tally[r] = (tally[r] || 0) + 1; });
+        const bySize = Object.keys(tally)
+            .map(Number)
+            .sort((x, y) => tally[y] - tally[x] || y - x);
+        const sizes = bySize.map(r => tally[r]).join("");
+
+        const unique = [...new Set(ranks)];
+        let run = null;
+        if (unique.length === 5) {
+            if (unique[0] - unique[4] === 4) run = unique[0];
+            else if (unique.join(",") === "14,5,4,3,2") run = 5;
+        }
+
+        // [category, ...tiebreak], the same shape, arrived at from the group sizes
+        // rather than from a chain of ifs about shape[0] and shape[1].
+        if (suited && run !== null) return [8, run];
+        if (sizes === "41") return [7, ...bySize];
+        if (sizes === "32") return [6, ...bySize];
+        if (suited) return [5, ...ranks];
+        if (run !== null) return [4, run];
+        if (sizes === "311") return [3, ...bySize];
+        if (sizes === "221") return [2, ...bySize];
+        if (sizes === "2111") return [1, ...bySize];
+        return [0, ...ranks];
+    }
+
+    const worse = (a, b) => {
+        for (let i = 0; i < Math.max(a.length, b.length); i++) {
+            if ((a[i] || 0) !== (b[i] || 0)) return (a[i] || 0) < (b[i] || 0);
+        }
+        return false;
+    };
+
+    function referenceBest(cards) {
+        let top = null;
+        for (let a = 0; a < 3; a++) for (let b = a + 1; b < 4; b++)
+            for (let c = b + 1; c < 5; c++) for (let d = c + 1; d < 6; d++)
+                for (let e = d + 1; e < 7; e++) {
+                    const score = reference5([cards[a], cards[b], cards[c], cards[d], cards[e]]);
+                    if (!top || worse(top, score)) top = score;
+                }
+        return top;
+    }
+
+    // A deck, and a deterministic shuffle — a failure has to be reproducible or it is
+    // just an anecdote about one CI run.
+    const DECK = [];
+    "23456789TJQKA".split("").forEach(r => "SHDC".split("").forEach(s => DECK.push(r + s)));
+
+    let seed = 20260904;
+    const random = () => {
+        seed = (seed * 1103515245 + 12345) & 0x7fffffff;
+        return seed / 0x7fffffff;
+    };
+
+    test("twenty thousand random seven-card hands rank the same way", () => {
+        const deck = [...DECK];
+        for (let round = 0; round < 20000; round++) {
+            // Seven off the top of a shuffle of only what it needs.
+            const drawn = [];
+            for (let i = 0; i < 7; i++) {
+                const pick = i + Math.floor(random() * (deck.length - i));
+                [deck[i], deck[pick]] = [deck[pick], deck[i]];
+                drawn.push(deck[i]);
+            }
+            const mine = HandRank.best(drawn);
+            const theirs = referenceBest(drawn);
+            assert.deepEqual([mine.category, ...mine.tiebreak], theirs,
+                `disagreed on ${drawn.join(" ")}`);
+        }
+    });
+
+    test("and four thousand random pairs of hands are ordered the same way", () => {
+        // The categories agreeing is not the same as the comparison agreeing: this is
+        // the half that pays somebody.
+        const deck = [...DECK];
+        for (let round = 0; round < 4000; round++) {
+            const drawn = [];
+            for (let i = 0; i < 9; i++) {
+                const pick = i + Math.floor(random() * (deck.length - i));
+                [deck[i], deck[pick]] = [deck[pick], deck[i]];
+                drawn.push(deck[i]);
+            }
+            const board = drawn.slice(0, 5);
+            const one = [...board, drawn[5], drawn[6]];
+            const two = [...board, drawn[7], drawn[8]];
+
+            const mine = Math.sign(HandRank.compare(HandRank.best(one), HandRank.best(two)));
+            const a = referenceBest(one), b = referenceBest(two);
+            const theirs = worse(a, b) ? -1 : worse(b, a) ? 1 : 0;
+            assert.equal(mine, theirs,
+                `board ${board.join(" ")}: ${drawn[5]}${drawn[6]} vs ${drawn[7]}${drawn[8]}`);
+        }
+    });
+});
+
+describe("saying it in a sentence", () => {
+    // The verdict line reads "Alexandra wins $25 with ___", so the phrase has to carry
+    // its own article. Which article is not something the first letter can answer: it
+    // is "a full house" and "a flush", but "four of a kind" and "two pair" take none,
+    // and nobody has ever said "an ace high".
+    test("every category takes the article a table would give it", () => {
+        const said = str => HandRank.phrase(HandRank.evaluate5(hand(str)));
+        assert.deepEqual([
+            said("AS KS QS JS TS"),
+            said("9H 8H 7H 6H 5H"),
+            said("7C 7D 7H 7S 2C"),
+            said("KC KD KH 3S 3C"),
+            said("AD JD 8D 5D 2D"),
+            said("9C 8D 7H 6S 5C"),
+            said("QC QD QH 7S 2C"),
+            said("AC AD 8H 8S 4C"),
+            said("QC QD 9H 5S 2C"),
+            said("AC JD 8H 5S 2C"),
+        ], [
+            "a royal flush",
+            "a straight flush, nine high",
+            "four of a kind, sevens",
+            "a full house, kings full of threes",
+            "a flush, ace high",
+            "a straight, nine high",
+            "three of a kind, queens",
+            "two pair, aces and eights",
+            "a pair of queens",
+            "ace high",
+        ]);
+    });
+
+    test("with nothing to say it says something", () => {
+        assert.equal(HandRank.phrase(null), "the best hand");
+    });
+});

tests/holdem/load.js

@@ -15,6 +15,7 @@ function load(name) {
 }
 
 const Money = load("money");
+const HandRank = load("handRank");
 const PotCalculator = load("potCalculator");
 const SplitCalculator = load("splitCalculator");
 const Betting = load("betting");
@@ -33,6 +34,15 @@ globalThis.HoldemState = HoldemState;
 // its methods reach for both. Loaded last so nothing it touches is still undefined.
 const ActionBar = load("actionBar");
 
+// The picker's slot bookkeeping — which slots it is filling, what is already dealt —
+// is plain state work and testable here. Only render() and open() touch the DOM.
+const CardPicker = load("cardPicker");
+
+// The wake lock's rule about when a table needs the screen is plain state work too.
+// Its acquire/release bookkeeping is testable here as well, against a stand-in for
+// navigator.wakeLock — see wakeLock.test.js.
+const WakeLock = load("wakeLock");
+
 // ---- Table builders ----------------------------------------------------------
 
 // A table with `seatCount` chairs where `seated` (a list of seat indexes) are dealt
@@ -78,6 +88,7 @@ function contributions(state) {
 
 module.exports = {
     Money,
+    HandRank,
     Render,
     HandHistoryExport,
     PotCalculator,
@@ -86,6 +97,8 @@ module.exports = {
     Betting,
     HoldemState,
     ActionBar,
+    CardPicker,
+    WakeLock,
     makeTable,
     chipsOnTable,
     contributions,

tests/holdem/misdeal.test.js

@@ -0,0 +1,155 @@
+// Taking a hand back.
+//
+// The rulings sheet in this tool has told dealers to redeal since the day it was
+// written — first card to the wrong seat, a seat entitled to a hand dealt out, one of
+// the first two cards exposed — and the tool had no way to do it. The only control that
+// ended a live hand was Next Hand, which says out loud that it takes the money off the
+// table without paying anybody. That is right for an abandoned pot and wrong for a
+// misdeal, where the blinds and the calls belong to the people who put them in.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Money, Betting, HoldemState, makeTable, chipsOnTable } = require("./load");
+
+const dealt = (extra = {}) => {
+    const state = makeTable({ seatCount: 6, stack: 200, smallBlind: 5, bigBlind: 10, dealerSeatIndex: 0, ...extra });
+    Betting.beginHand(state);
+    return state;
+};
+
+describe("the money", () => {
+    test("goes back to the people who put it in", () => {
+        const state = dealt();
+        const before = state.seats.map(p => Betting.stackOf(state, p) + Betting.committed(p));
+        Betting.takeHandBack(state);
+        assert.deepEqual(state.seats.map(p => Betting.stackOf(state, p)), before);
+    });
+
+    test("including calls and raises, not just the blinds", () => {
+        const state = dealt();
+        Betting.raiseTo(state, state.actingSeatIndex, 40);
+        Betting.call(state, state.actingSeatIndex);
+        assert.ok(Betting.potSoFar(state) > 50, "there is real money in the middle");
+
+        const taken = Betting.takeHandBack(state);
+        assert.equal(taken.total, 95, "blinds and both wagers");
+        assert.deepEqual(state.seats.map(p => Betting.stackOf(state, p)), [200, 200, 200, 200, 200, 200]);
+    });
+
+    test("and across streets, once chips have been swept into hand totals", () => {
+        const state = dealt();
+        [3, 4, 5, 0, 1, 2].forEach(seat => {
+            if (state.actingSeatIndex !== null) Betting.call(state, state.actingSeatIndex);
+        });
+        Betting.closeStreet(state);
+        assert.ok(state.seats.some(p => (Number(p.amountOverride) || 0) > 0), "the flop's money is banked");
+
+        Betting.takeHandBack(state);
+        assert.deepEqual(state.seats.map(p => Betting.stackOf(state, p)), [200, 200, 200, 200, 200, 200]);
+        assert.deepEqual(state.seats.map(p => p.amountOverride), [null, null, null, null, null, null]);
+    });
+
+    test("the table has exactly the chips it started with", () => {
+        const fresh = makeTable({ seatCount: 6, stack: 200, smallBlind: 5, bigBlind: 10 });
+        const total = chipsOnTable(fresh);
+        const state = dealt();
+        Betting.raiseTo(state, state.actingSeatIndex, 40);
+        Betting.takeHandBack(state);
+        assert.equal(chipsOnTable(state), total);
+    });
+
+    test("nothing is thrown away — the discard pile doesn't move", () => {
+        const state = dealt();
+        state.discarded = 8;
+        Betting.takeHandBack(state);
+        assert.equal(state.discarded, 8, "a misdeal is not an abandoned pot");
+    });
+
+    test("it says what went back and to whom", () => {
+        const state = dealt();
+        const taken = Betting.takeHandBack(state);
+        assert.equal(taken.returned.length, 2, "the two blinds");
+        assert.deepEqual(taken.returned.map(r => r.amount).sort((a, b) => a - b), [5, 10]);
+        assert.ok(taken.returned.every(r => r.name), "named, because the dealer says it out loud");
+    });
+});
+
+describe("the table afterwards", () => {
+    test("is waiting to deal the same hand again", () => {
+        const state = dealt();
+        Betting.takeHandBack(state);
+        assert.equal(state.bettingOpen, false, "the dealer says when");
+        assert.equal(state.street, "preflop");
+        assert.equal(state.actingSeatIndex, null);
+        assert.equal(state.currentBet, 0);
+    });
+
+    test("keeps the button where it was — a misdeal is not the next hand", () => {
+        const state = dealt({ dealerSeatIndex: 3 });
+        const handNumber = state.handNumber;
+        Betting.takeHandBack(state);
+        assert.equal(state.dealerSeatIndex, 3);
+        assert.equal(state.handNumber, handNumber, "no hand has been played");
+        assert.equal((state.handHistory || []).length, 0, "and none is logged");
+    });
+
+    test("keeps the straddle, which was announced and still stands", () => {
+        const state = makeTable({ seatCount: 6, stack: 200, smallBlind: 5, bigBlind: 10 });
+        state.straddleCount = 1;
+        Betting.beginHand(state);
+        assert.deepEqual(state.postedStraddles, [3]);
+
+        Betting.takeHandBack(state);
+        assert.equal(state.straddleCount, 1, "still on for the redeal");
+        assert.deepEqual(state.postedStraddles, [], "but nothing is out there yet");
+
+        Betting.beginHand(state);
+        assert.deepEqual(state.postedStraddles, [3], "and it goes out again");
+    });
+
+    test("clears the cards and the folds, because none of it happened", () => {
+        const state = dealt();
+        state.seats[3].cards = ["As", "Kd"];
+        Betting.fold(state, 3);
+        Betting.takeHandBack(state);
+        assert.deepEqual(state.seats[3].cards, ["", ""]);
+        assert.equal(state.seats[3].folded, false);
+        assert.ok(state.seats.every(p => !p.hasActed));
+    });
+
+    test("deals again cleanly, with the same blinds on the same players", () => {
+        const state = dealt();
+        const first = state.seats.map(p => Betting.committed(p));
+        Betting.takeHandBack(state);
+        Betting.beginHand(state);
+        assert.deepEqual(state.seats.map(p => Betting.committed(p)), first);
+    });
+});
+
+describe("the bank still balances", () => {
+    test("through a misdeal and the redeal after it", () => {
+        const state = dealt();
+        state.seats.forEach(p => { p.buyIns = 200; });
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+
+        Betting.raiseTo(state, state.actingSeatIndex, 60);
+        Betting.takeHandBack(state);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+
+        Betting.beginHand(state);
+        const bank = HoldemState.bankReconciliation(state);
+        assert.equal(bank.balanced, true);
+        assert.equal(bank.cashIn, 1200);
+    });
+});
+
+describe("taking back a hand nobody had money in", () => {
+    test("is harmless: no blinds, nothing moves", () => {
+        const state = makeTable({ seatCount: 6, stack: 200, smallBlind: 0, bigBlind: 0 });
+        Betting.beginHand(state);
+        const taken = Betting.takeHandBack(state);
+        assert.equal(taken.total, 0);
+        assert.deepEqual(taken.returned, []);
+        assert.equal(state.bettingOpen, false);
+    });
+});

tests/holdem/oneStackRule.test.js

@@ -0,0 +1,133 @@
+// One question, one answer.
+//
+// The round before this found the bank check and the standings reading `seat.stack`
+// where the felt reads the table's starting stack — two parts of the tool disagreeing
+// about how much money is on the table. This is the sweep that followed: everywhere
+// else the same two questions get asked, asked the same way.
+//
+//   "What is this seat holding?"      -> HoldemState.chipsHeldBy
+//   "Is anybody in this chair?"       -> HoldemState.seatInPlay
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { HoldemState, Betting, SettleUp } = require("./load");
+
+const openedOnTheDefault = (stack = 200) => {
+    const state = HoldemState.createDefault();
+    HoldemState.resizeSeats(state, 6);
+    state.defaultStack = stack;
+    ["Ann", "Ben", "Cal"].forEach((name, i) => {
+        state.seats[i].name = name;
+        state.seats[i].inHand = true;
+        state.seats[i].buyIns = stack;
+    });
+    return state;
+};
+
+describe("what a seat is holding", () => {
+    test("is the same number the felt plays with", () => {
+        const state = openedOnTheDefault();
+        state.seats.forEach((player, i) => {
+            if (i > 2) return;
+            assert.equal(HoldemState.chipsHeldBy(state, player), Betting.stackOf(state, player));
+        });
+    });
+
+    test("and is nothing at all for an empty chair", () => {
+        const state = openedOnTheDefault();
+        // Betting's own answer for an empty chair is the table default, because it is
+        // only ever asked about seats that are in a hand. The money side has to ask
+        // about all ten chairs, so it checks whether anybody is in them first.
+        assert.equal(Betting.stackOf(state, state.seats[5]), 200);
+        assert.equal(HoldemState.chipsHeldBy(state, state.seats[5]), 0);
+    });
+
+    test("counts a stack the dealer typed over the table's default", () => {
+        const state = openedOnTheDefault();
+        state.seats[0].stack = 75;
+        assert.equal(HoldemState.chipsHeldBy(state, state.seats[0]), 75);
+    });
+});
+
+describe("is anybody in this chair", () => {
+    const empty = () => HoldemState.createDefault().seats[0];
+
+    test("an untouched chair is empty", () => {
+        assert.equal(HoldemState.seatInPlay(empty()), false);
+        assert.equal(HoldemState.seatInPlay(null), false);
+    });
+
+    test("a name, chips, cash, a bet or a dealt hand all count", () => {
+        [
+            ["a name", p => { p.name = "Ann"; }],
+            ["chips", p => { p.stack = 50; }],
+            ["cash taken", p => { p.buyIns = 100; }],
+            ["a bet in front of them", p => { p.committed = 5; }],
+            ["money already swept in", p => { p.amountOverride = 20; }],
+            ["a hand dealt to them", p => { p.inHand = true; }],
+        ].forEach(([what, mark]) => {
+            const seat = empty();
+            mark(seat);
+            assert.equal(HoldemState.seatInPlay(seat), true, what);
+        });
+    });
+
+    test("whitespace is not a name", () => {
+        const seat = empty();
+        seat.name = "   ";
+        assert.equal(HoldemState.seatInPlay(seat), false);
+    });
+});
+
+describe("the parts that used to disagree", () => {
+    test("the open seats and the seat count see the same empty chairs", () => {
+        const state = openedOnTheDefault();
+        // Three players, six chairs.
+        assert.deepEqual(HoldemState.openSeats(state), [3, 4, 5]);
+        const occupied = state.seats.filter(p => HoldemState.seatInPlay(p)).length;
+        assert.equal(occupied + HoldemState.openSeats(state).length, state.seats.length);
+    });
+
+    test("a chair holding only a dealt hand is not offered to the waiting list", () => {
+        // The old test looked at name, buy-ins and stack. A seat marked in-hand with
+        // none of those would have been handed to the next person in the queue, on top
+        // of whoever was already playing it.
+        const state = openedOnTheDefault();
+        state.seats[4].inHand = true;
+        assert.deepEqual(HoldemState.openSeats(state), [3, 5]);
+
+        HoldemState.addToWaitingList(state, "Priya");
+        const result = HoldemState.seatFromWaitingList(state, state.waitingList[0].id, 4);
+        assert.equal(result.ok, false);
+    });
+
+    test("the bank, the standings and the settle-up all price the night the same way", () => {
+        const state = openedOnTheDefault();
+        state.seats[0].stack = 320;   // Ann is up
+        state.seats[1].stack = 80;    // Ben is down
+
+        const bank = HoldemState.bankReconciliation(state);
+        const standings = HoldemState.sessionStandings(state);
+        const chipsFromStandings = standings
+            .filter(row => !row.cashedOut)
+            .reduce((sum, row) => sum + row.chipsInFront, 0);
+
+        assert.equal(bank.chipsInPlay, chipsFromStandings, "same chips on the table");
+        assert.equal(bank.balanced, true);
+
+        // And the payments the dealer is told to make add up to the same money.
+        const plan = SettleUp.plan(standings);
+        const owed = standings.reduce((sum, row) => sum + Math.max(0, row.cashPosition), 0);
+        const paid = plan.payments.reduce((sum, row) => sum + row.amount, 0);
+        assert.equal(paid + (plan.shortBy || 0) - (plan.overBy || 0), owed);
+    });
+
+    test("a player still holding the table's starting stack is in all three", () => {
+        const state = openedOnTheDefault();
+        const standings = HoldemState.sessionStandings(state);
+        assert.equal(standings.length, 3);
+        assert.deepEqual(standings.map(row => row.chipsInFront), [200, 200, 200]);
+        assert.equal(HoldemState.bankReconciliation(state).chipsInPlay, 600);
+        assert.deepEqual(SettleUp.plan(standings).payments, [], "everyone is even, so nobody pays anybody");
+    });
+});

tests/holdem/panelGlance.test.js

@@ -0,0 +1,218 @@
+// What a shut sidebar panel says about itself.
+//
+// The sidebar is eight <details>, every one exactly 60px tall with nothing in it but
+// its own name — 480px of a phone's screen and 480px of a 660px desktop column, saying
+// "Standings", "Hands", "Waiting list" and nothing else. Whether the box balances,
+// whether anyone is waiting for a seat, how many hands have been played: the page had
+// all three worked out and charged a tap for each of them, on rows two thirds empty.
+//
+// So each one now carries the fact you would have opened it for. Two rules hold this
+// together, and both are checked here.
+//
+// A glance appears only when it has something a dealer would act on. Eight rows that
+// always say something are eight rows that say nothing again, and a row reading
+// "Nobody waiting" all night is the clutter this went in to remove.
+//
+// And a glance never says something the panel under it would contradict. It is the
+// panel's own sentence with the explanation taken off, so it has to be read off the
+// same state — never off the panel's DOM, which for a shut <details> isn't rendered
+// at all.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Render, HoldemState, makeTable } = require("./load");
+
+const glances = state => Render.panelGlances(state);
+const textOf = (state, id) => (glances(state)[id] || {}).text;
+
+// A table part-way through a night: money on it, so the bank check has an opinion.
+const night = () => {
+    const state = makeTable({ seatCount: 9, seated: [0, 1, 2, 3, 4], stack: 200,
+        smallBlind: 5, bigBlind: 10 });
+    state.seats.slice(0, 5).forEach(p => { p.buyIns = 200; });
+    return state;
+};
+
+describe("the rows that always have something to say", () => {
+    test("the table's own shape and stakes", () => {
+        assert.equal(textOf(night(), "glanceTableSetup"), "9 seats · $5/$10");
+    });
+
+    test("and the stakes drop out rather than reading as free", () => {
+        // A table set up with no blinds yet is a real state — it is what the panel
+        // opens on — and "9 seats · $0/$0" would be a claim about the game rather
+        // than an admission that nobody has said yet.
+        const state = night();
+        state.smallBlind = 0;
+        state.bigBlind = 0;
+        assert.equal(textOf(state, "glanceTableSetup"), "9 seats");
+    });
+
+    test("the chip values, as a range rather than a count of rows", () => {
+        // "Are the values right for tonight's set" is the question this answers.
+        // Five colours is the answer to a different one.
+        assert.equal(textOf(night(), "glanceChips"), "5 colours · $1–$500");
+    });
+
+    test("with a chip nobody has priced yet left out of the range", () => {
+        // A blank row in the legend is a chip the dealer hasn't got to, not a
+        // zero-dollar chip — and letting it in would read the range as starting at $0.
+        const state = night();
+        state.chipLegend.push({ id: "pink", color: "#ff88aa", value: 0 });
+        assert.equal(textOf(state, "glanceChips"), "5 colours · $1–$500");
+    });
+
+    test("and one chip is a value, not a range of one", () => {
+        const state = night();
+        state.chipLegend = [{ id: "red", color: "#c0392b", value: 5 }];
+        assert.equal(textOf(state, "glanceChips"), "1 colour · $5");
+    });
+});
+
+describe("the bank check, which is the one worth a colour", () => {
+    test("says so when the cash covers the chips", () => {
+        const state = night();
+        const { text, tone } = glances(state).glanceStandings;
+        assert.equal(text, "Balanced");
+        assert.equal(tone, "ok");
+    });
+
+    test("and names the gap when it doesn't", () => {
+        // Chips on the table that nobody paid for. The glance is the alarm and the
+        // amount; which seat is holding them is a paragraph, and that is the half
+        // that stays behind the tap.
+        const state = night();
+        state.seats[0].buyIns = 100;
+        const { text, tone } = glances(state).glanceStandings;
+        assert.equal(text, "Off by $100");
+        assert.equal(tone, "warn");
+    });
+
+    test("the same way round when the cash is the side that's over", () => {
+        // One word covers both signs on purpose: the number and the alarm are what a
+        // dealer acts on, and "short" against "over" is a direction they would have to
+        // hold in their head to read. The panel says which way in a sentence.
+        const state = night();
+        state.seats[0].buyIns = 400;
+        const { text, tone } = glances(state).glanceStandings;
+        assert.equal(text, "Off by $200");
+        assert.equal(tone, "warn");
+    });
+
+    test("and stays quiet over a table nobody has bought into", () => {
+        // The panel hides its own check here for the same reason. A glance reading
+        // "Balanced" over an empty table is answering for a count never taken.
+        const state = makeTable({ seatCount: 9, seated: [], smallBlind: 5, bigBlind: 10 });
+        state.seats.forEach(p => { p.stack = null; p.buyIns = 0; });
+        assert.equal(textOf(state, "glanceStandings"), "");
+        assert.equal(glances(state).glanceStandings.tone, "");
+    });
+
+    test("and agrees with the sentence the panel would print", () => {
+        // The two are read off one call apiece and must never disagree — a glance
+        // saying "Balanced" over a panel saying "$40 more in chips than cash taken"
+        // is worse than no glance at all.
+        [0, 100, 400].forEach(buyIn => {
+            const state = night();
+            state.seats[0].buyIns = buyIn;
+            const bank = HoldemState.bankReconciliation(state);
+            const { text, tone } = glances(state).glanceStandings;
+            assert.equal(tone === "ok", bank.balanced, `buy-in ${buyIn}`);
+            if (!bank.balanced) {
+                assert.ok(text.includes(String(Math.abs(bank.difference))),
+                    `${text} doesn't carry the panel's own ${bank.difference}`);
+            }
+        });
+    });
+});
+
+describe("the rows that stay quiet until they have news", () => {
+    test("nobody waiting, no note, no hands played yet", () => {
+        const state = night();
+        assert.equal(textOf(state, "glanceWaiting"), "");
+        assert.equal(textOf(state, "glanceHands"), "");
+        assert.equal(textOf(state, "glanceNotes"), "");
+    });
+
+    test("and speak up the moment they do", () => {
+        const state = night();
+        state.waitingList = [{ id: "w1", name: "Nadia" }, { id: "w2", name: "Owen" }];
+        state.handHistory = [{ handNumber: 1, pot: 120, payouts: [], ledger: [] }];
+        assert.equal(textOf(state, "glanceWaiting"), "2 waiting");
+        assert.equal(textOf(state, "glanceHands"), "1 hand");
+    });
+
+    test("counting one of something as one of it", () => {
+        const state = night();
+        state.waitingList = [{ id: "w1", name: "Nadia" }];
+        state.handHistory = [{ handNumber: 1, pot: 120, payouts: [], ledger: [] },
+            { handNumber: 2, pot: 80, payouts: [], ledger: [] }];
+        assert.equal(textOf(state, "glanceWaiting"), "1 waiting");
+        assert.equal(textOf(state, "glanceHands"), "2 hands");
+    });
+
+    test("and a note shows which note it is, not that there is one", () => {
+        // "Has notes" costs a tap to learn anything, which is the whole failure this
+        // is fixing. The text is what identifies it; the row's own width ellipsises.
+        const state = night();
+        state.notes = "Sam owes Dee $20 from last night";
+        assert.equal(textOf(state, "glanceNotes"), "Sam owes Dee $20 from last night");
+    });
+
+    test("reading past the blank lines a note gets typed under", () => {
+        // Notes get written as a list — a heading, a blank line, then the thing. The
+        // first line of the string is regularly not the first line of the note.
+        const state = night();
+        state.notes = "\n   \n  Sam owes Dee $20\nand Ted owes Al $5";
+        assert.equal(textOf(state, "glanceNotes"), "Sam owes Dee $20");
+    });
+
+    test("and a note of nothing but whitespace is no note", () => {
+        const state = night();
+        state.notes = "\n\n   \t  \n";
+        assert.equal(textOf(state, "glanceNotes"), "");
+    });
+});
+
+describe("what the row is allowed to be", () => {
+    const ROWS = ["glanceTableSetup", "glanceStandings", "glanceWaiting",
+        "glanceHands", "glanceChips", "glanceNotes"];
+
+    test("every glance the sidebar renders is one this knows about", () => {
+        // The list drives the DOM writes, so a glance computed and never listed is a
+        // row that silently keeps its old text for the rest of the night.
+        const state = night();
+        assert.deepEqual(Object.keys(glances(state)).sort(), [...ROWS].sort());
+        assert.deepEqual([...Render.PANEL_GLANCES].sort(), [...ROWS].sort());
+    });
+
+    test("and none of them is a paragraph", () => {
+        // The row is 44px of a 320px column with a label already on it. Anything
+        // long enough to need the panel's room belongs in the panel.
+        const state = night();
+        state.waitingList = [{ id: "w1", name: "Nadia" }];
+        state.handHistory = [{ handNumber: 1, pot: 120, payouts: [], ledger: [] }];
+        ROWS.filter(id => id !== "glanceNotes").forEach(id => {
+            const text = textOf(state, id);
+            assert.ok(text.length <= 24, `${id} is ${text.length} chars: "${text}"`);
+            assert.ok(!text.includes("\n"), `${id} has a line break in it`);
+        });
+    });
+
+    test("including a note, which is trimmed to one line and left to the ellipsis", () => {
+        // The one glance whose length isn't ours to choose. It must still be a single
+        // line — a second one would make the row taller, and the row is what holds the
+        // sidebar to eight equal slabs.
+        const state = night();
+        state.notes = "x".repeat(400) + "\nsecond line";
+        const text = textOf(state, "glanceNotes");
+        assert.ok(!text.includes("\n"));
+        assert.equal(text, "x".repeat(400));
+    });
+
+    test("and a state that isn't there yet asks for nothing", () => {
+        // renderAll runs before the first load has finished on a cold open.
+        assert.deepEqual(Render.panelGlances(null), {});
+        assert.deepEqual(Render.panelGlances(undefined), {});
+    });
+});

tests/holdem/png.js

@@ -0,0 +1,100 @@
+// Just enough PNG to read pixels back out of a screenshot.
+//
+// The contrast audit needs to know what colour is actually behind a piece of text, and
+// the only honest answer is the one the browser painted. Walking the DOM and
+// compositing `background-color` up the ancestors gets it wrong wherever a gradient,
+// a shadow or a border is doing the painting: tried that first, and it reported the
+// gold dealer button as black-on-black at Lc 0.4 — a fault that does not exist, on an
+// element anyone can see is legible. Sampling the screenshot cannot make that mistake.
+//
+// zlib is in Node, so this needs no dependency. Screenshots are 8-bit and
+// non-interlaced; anything else throws rather than returning quietly wrong pixels.
+const zlib = require("node:zlib");
+
+const SIGNATURE = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]);
+
+function paeth(a, b, c) {
+    const p = a + b - c;
+    const pa = Math.abs(p - a), pb = Math.abs(p - b), pc = Math.abs(p - c);
+    if (pa <= pb && pa <= pc) return a;
+    return pb <= pc ? b : c;
+}
+
+function decode(buffer) {
+    if (!buffer.subarray(0, 8).equals(SIGNATURE)) throw new Error("not a PNG");
+
+    let width = 0, height = 0, depth = 0, colorType = 0, interlace = 0;
+    const idat = [];
+
+    let at = 8;
+    while (at < buffer.length) {
+        const length = buffer.readUInt32BE(at);
+        const type = buffer.toString("ascii", at + 4, at + 8);
+        const data = buffer.subarray(at + 8, at + 8 + length);
+        at += 12 + length;
+
+        if (type === "IHDR") {
+            width = data.readUInt32BE(0);
+            height = data.readUInt32BE(4);
+            depth = data[8];
+            colorType = data[9];
+            interlace = data[12];
+        } else if (type === "IDAT") {
+            idat.push(data);
+        } else if (type === "IEND") {
+            break;
+        }
+    }
+
+    if (depth !== 8) throw new Error(`unsupported bit depth ${depth}`);
+    if (interlace !== 0) throw new Error("interlaced PNG not supported");
+    if (colorType !== 2 && colorType !== 6) throw new Error(`unsupported colour type ${colorType}`);
+
+    const channels = colorType === 6 ? 4 : 3;
+    const raw = zlib.inflateSync(Buffer.concat(idat));
+    const stride = width * channels;
+    const out = Buffer.alloc(width * height * 4);
+
+    let prior = Buffer.alloc(stride);
+    for (let y = 0; y < height; y++) {
+        const filter = raw[y * (stride + 1)];
+        const line = Buffer.from(raw.subarray(y * (stride + 1) + 1, (y + 1) * (stride + 1)));
+
+        for (let i = 0; i < stride; i++) {
+            const left = i >= channels ? line[i - channels] : 0;
+            const up = prior[i];
+            const upLeft = i >= channels ? prior[i - channels] : 0;
+            switch (filter) {
+                case 0: break;
+                case 1: line[i] = (line[i] + left) & 0xff; break;
+                case 2: line[i] = (line[i] + up) & 0xff; break;
+                case 3: line[i] = (line[i] + ((left + up) >> 1)) & 0xff; break;
+                case 4: line[i] = (line[i] + paeth(left, up, upLeft)) & 0xff; break;
+                default: throw new Error(`unknown filter ${filter} on row ${y}`);
+            }
+        }
+
+        for (let x = 0; x < width; x++) {
+            const from = x * channels;
+            const to = (y * width + x) * 4;
+            out[to] = line[from];
+            out[to + 1] = line[from + 1];
+            out[to + 2] = line[from + 2];
+            out[to + 3] = channels === 4 ? line[from + 3] : 255;
+        }
+        prior = line;
+    }
+
+    return { width, height, data: out };
+}
+
+// Nearest pixel, clamped. A rect can sit a hair outside the shot after rounding, and
+// clamping is the right answer there rather than an exception or a black pixel.
+function pixelAt(image, x, y) {
+    const px = Math.min(image.width - 1, Math.max(0, Math.round(x)));
+    const py = Math.min(image.height - 1, Math.max(0, Math.round(y)));
+    const at = (py * image.width + px) * 4;
+    return [image.data[at], image.data[at + 1], image.data[at + 2]];
+}
+
+module.exports = { decode, pixelAt };

tests/holdem/pngDecode.test.js

@@ -0,0 +1,178 @@
+// The screenshot reader, tested by building PNGs whose pixels are already known.
+//
+// This matters more than it looks. If a filter is decoded wrong the pixels are still
+// plausible colours — slightly off greys and greens, not obvious garbage — and the
+// contrast audit would report confident, wrong numbers about a page nobody would think
+// to re-check. So every filter type gets encoded here and read back.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const zlib = require("node:zlib");
+const { decode, pixelAt } = require("./png");
+
+const CRC_TABLE = (() => {
+    const table = new Int32Array(256);
+    for (let n = 0; n < 256; n++) {
+        let c = n;
+        for (let k = 0; k < 8; k++) c = c & 1 ? 0xedb88320 ^ (c >>> 1) : c >>> 1;
+        table[n] = c;
+    }
+    return table;
+})();
+
+function crc32(buf) {
+    let c = 0xffffffff;
+    for (const b of buf) c = CRC_TABLE[(c ^ b) & 0xff] ^ (c >>> 8);
+    return (c ^ 0xffffffff) >>> 0;
+}
+
+function chunk(type, data) {
+    const head = Buffer.alloc(8);
+    head.writeUInt32BE(data.length, 0);
+    head.write(type, 4, "ascii");
+    const crc = Buffer.alloc(4);
+    crc.writeUInt32BE(crc32(Buffer.concat([Buffer.from(type, "ascii"), data])), 0);
+    return Buffer.concat([head, data, crc]);
+}
+
+function paeth(a, b, c) {
+    const p = a + b - c;
+    const pa = Math.abs(p - a), pb = Math.abs(p - b), pc = Math.abs(p - c);
+    if (pa <= pb && pa <= pc) return a;
+    return pb <= pc ? b : c;
+}
+
+// pixels: [y][x] = [r,g,b(,a)]. filter is applied to every row, which is legal PNG and
+// is exactly how each decoder branch gets exercised.
+function encode(pixels, filter = 0, channels = 4) {
+    const height = pixels.length, width = pixels[0].length;
+    const stride = width * channels;
+    const rows = [];
+    let prior = Buffer.alloc(stride);
+
+    for (let y = 0; y < height; y++) {
+        const raw = Buffer.alloc(stride);
+        for (let x = 0; x < width; x++) {
+            for (let c = 0; c < channels; c++) {
+                raw[x * channels + c] = pixels[y][x][c] !== undefined ? pixels[y][x][c] : 255;
+            }
+        }
+        const filtered = Buffer.alloc(stride);
+        for (let i = 0; i < stride; i++) {
+            const left = i >= channels ? raw[i - channels] : 0;
+            const up = prior[i];
+            const upLeft = i >= channels ? prior[i - channels] : 0;
+            switch (filter) {
+                case 0: filtered[i] = raw[i]; break;
+                case 1: filtered[i] = (raw[i] - left) & 0xff; break;
+                case 2: filtered[i] = (raw[i] - up) & 0xff; break;
+                case 3: filtered[i] = (raw[i] - ((left + up) >> 1)) & 0xff; break;
+                case 4: filtered[i] = (raw[i] - paeth(left, up, upLeft)) & 0xff; break;
+                default: throw new Error("bad filter");
+            }
+        }
+        rows.push(Buffer.concat([Buffer.from([filter]), filtered]));
+        prior = raw;
+    }
+
+    const ihdr = Buffer.alloc(13);
+    ihdr.writeUInt32BE(width, 0);
+    ihdr.writeUInt32BE(height, 4);
+    ihdr[8] = 8;
+    ihdr[9] = channels === 4 ? 6 : 2;
+
+    return Buffer.concat([
+        Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]),
+        chunk("IHDR", ihdr),
+        chunk("IDAT", zlib.deflateSync(Buffer.concat(rows))),
+        chunk("IEND", Buffer.alloc(0)),
+    ]);
+}
+
+// Deliberately awkward: neighbouring values that differ, so a filter decoded with the
+// wrong neighbour produces a different answer rather than the same one by luck.
+const PIXELS = [
+    [[20, 30, 40], [200, 10, 90], [18, 18, 18], [255, 255, 255]],
+    [[0, 0, 0], [28, 108, 60], [108, 68, 39], [1, 2, 3]],
+    [[240, 217, 168], [47, 122, 77], [200, 200, 200], [17, 17, 17]],
+];
+
+describe("every filter type reads back exactly", () => {
+    [0, 1, 2, 3, 4].forEach(filter => {
+        test(`filter ${filter}`, () => {
+            const image = decode(encode(PIXELS, filter));
+            assert.equal(image.width, 4);
+            assert.equal(image.height, 3);
+            for (let y = 0; y < PIXELS.length; y++) {
+                for (let x = 0; x < PIXELS[y].length; x++) {
+                    assert.deepEqual(pixelAt(image, x, y), PIXELS[y][x],
+                        `pixel ${x},${y} under filter ${filter}`);
+                }
+            }
+        });
+    });
+
+    test("and a three-channel image reads back too", () => {
+        const image = decode(encode(PIXELS, 4, 3));
+        assert.deepEqual(pixelAt(image, 1, 2), [47, 122, 77]);
+    });
+
+    test("including where Paeth has to choose between close neighbours", () => {
+        // Written first to catch paeth(left, up, ...) decoded as paeth(up, left, ...),
+        // on the assumption that the two differ on a tie. They don't, anywhere: the
+        // predictor is symmetric in its first two arguments, checked over all 16,777,216
+        // byte triples. The reason is that a tie between pa and pb requires
+        // left + up == 2 * upLeft, and that is exactly the condition making pc zero — so
+        // every tie is resolved by returning upLeft, whichever order the other two
+        // arrived in. Swapping them is a no-op and no test can catch it, which is worth
+        // knowing rather than papering over with a fixture that appears to.
+        //
+        // What this does catch is the mistake that is actually available: reading the
+        // wrong neighbour. The values sit close together so a predictor that reaches one
+        // pixel off produces a different answer rather than the same one by luck.
+        const CLOSE = [
+            [[100, 10, 20], [110, 40, 25]],
+            [[90, 70, 30], [55, 95, 35]],
+        ];
+        const image = decode(encode(CLOSE, 4));
+        assert.deepEqual(pixelAt(image, 1, 1), [55, 95, 35]);
+        assert.deepEqual(pixelAt(image, 0, 1), [90, 70, 30]);
+        assert.deepEqual(pixelAt(image, 1, 0), [110, 40, 25]);
+    });
+});
+
+describe("sampling", () => {
+    const image = decode(encode(PIXELS, 0));
+
+    test("rounds to the nearest pixel", () => {
+        assert.deepEqual(pixelAt(image, 0.4, 0.4), [20, 30, 40]);
+        assert.deepEqual(pixelAt(image, 0.6, 0.4), [200, 10, 90]);
+    });
+
+    test("clamps rather than throwing or reading black", () => {
+        // A rect can sit a hair outside the shot once it's been rounded, and a silent
+        // black pixel there would read as a contrast failure that isn't one.
+        assert.deepEqual(pixelAt(image, -5, -5), [20, 30, 40]);
+        assert.deepEqual(pixelAt(image, 999, 999), [17, 17, 17]);
+    });
+});
+
+describe("what it refuses", () => {
+    test("something that isn't a PNG at all", () => {
+        assert.throws(() => decode(Buffer.from("not a png at all, honestly")), /not a PNG/);
+    });
+
+    test("an interlaced one, rather than returning scrambled pixels", () => {
+        const png = encode(PIXELS, 0);
+        // Byte 12 of the IHDR data: 8 signature + 8 chunk header + 12 = interlace flag.
+        const broken = Buffer.from(png);
+        broken[8 + 8 + 12] = 1;
+        assert.throws(() => decode(broken), /interlaced/);
+    });
+
+    test("a colour type it cannot read", () => {
+        const broken = Buffer.from(encode(PIXELS, 0));
+        broken[8 + 8 + 9] = 3; // palette
+        assert.throws(() => decode(broken), /colour type/);
+    });
+});

tests/holdem/potBreakdown.test.js

@@ -0,0 +1,127 @@
+// Who can win each pot, said in the fewest names that answer it.
+//
+// The breakdown used to list every eligible player for every pot. Pot eligibility is
+// nested — potCalculator.test.js checks that across 20,000 tables — so the main pot's
+// line was every name at the table and each side pot repeated it minus one. The lines
+// that were too long to fit were exactly the ones nobody needed spelled out, and the
+// short ones at the bottom were the side pots a dealer actually announces by name.
+//
+// Measured on an iPhone 14 before this: one all-in five-handed already clipped the main
+// pot, and twelve-handed the first row wanted 521px of a 254px slot, with no count and
+// no title — a dealer reading "Alexandra…" could not tell whether three people or
+// eleven were eligible, which is the number the showdown turns on.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Render } = require("./load");
+
+// Names are "P<id>" so a test reads as ids and the joining is still exercised.
+const nameFor = id => `P${id}`;
+const say = (eligible, everyone) => Render.describeEligible(eligible, everyone, nameFor);
+
+describe("the eligible line", () => {
+    test("says so plainly when the whole table can win it", () => {
+        // The main pot, every hand. Twelve names to say "nobody is excluded yet" was
+        // the single longest line in the component and the least informative.
+        assert.equal(say(["a", "b", "c"], ["a", "b", "c"]), "all 3");
+        assert.equal(say(["a"], ["a"]), "all 1");
+    });
+
+    test("names who is out when that is the shorter list", () => {
+        const table = ["a", "b", "c", "d", "e", "f", "g", "h"];
+        assert.equal(say(["b", "c", "d", "e", "f", "g", "h"], table), "7 in, not Pa");
+        assert.equal(say(["c", "d", "e", "f", "g", "h"], table), "6 in, not Pa and Pb");
+        assert.equal(say(["d", "e", "f", "g", "h"], table), "5 in, not Pa, Pb and Pc");
+    });
+
+    test("names who is in when that is the shorter list", () => {
+        // The far side pots, which are the ones a dealer announces by name: "side pot
+        // is 80 between Ben and Carlos".
+        const table = ["a", "b", "c", "d", "e", "f", "g", "h"];
+        assert.equal(say(["g", "h"], table), "2 in, Pg and Ph");
+        assert.equal(say(["h"], table), "1 in, Ph");
+        assert.equal(say(["f", "g", "h"], table), "3 in, Pf, Pg and Ph");
+    });
+
+    test("and when the two are the same length, says who is in", () => {
+        // A tie is not a reason to make the dealer do the subtraction: "who can win
+        // this" is the question, so answer it directly when it costs nothing.
+        const table = ["a", "b", "c", "d"];
+        assert.equal(say(["c", "d"], table), "2 in, Pc and Pd");
+    });
+
+    test("leads with the count, because it is the tail that gets cut off", () => {
+        // .potLayerWho is right-aligned with an ellipsis, so a line too long for a phone
+        // loses its end. Every form has to begin with the number of hands to ask for.
+        const table = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l"];
+        [table, ["c", "d", "e", "f", "g", "h", "i", "j", "k", "l"], ["k", "l"]]
+            .forEach(eligible => assert.match(say(eligible, table), /^(all \d+|\d+ in,)/,
+                `"${say(eligible, table)}" buries the count where a narrow screen can eat it`));
+    });
+
+    test("never spells out more than half the table", () => {
+        // The point of picking the shorter side. Nested eligibility makes the two lists
+        // complements, so this is a guarantee rather than a hope.
+        const table = Array.from({ length: 12 }, (_, i) => `s${i}`);
+        for (let inCount = 1; inCount <= 12; inCount++) {
+            const line = say(table.slice(0, inCount), table);
+            const named = (line.match(/P/g) || []).length;
+            assert.ok(named <= 6, `${inCount} of 12 named ${named} people: "${line}"`);
+        }
+    });
+});
+
+// A stub rather than a DOM: the file has no jsdom and does not want one. Enough of an
+// element to answer what the row is made of.
+const fakeDom = () => {
+    const make = () => ({
+        className: "", textContent: "", title: "", children: [],
+        classList: { add() {} },
+        appendChild(child) { this.children.push(child); return child; },
+    });
+    global.document = { createElement: make };
+    return () => { delete global.document; };
+};
+
+describe("the row it builds", () => {
+    const pots = [
+        { label: "Main pot", amount: 300, eligible: ["a", "b", "c", "d"] },
+        { label: "Side pot 1", amount: 150, eligible: ["c", "d"] },
+    ];
+    const textOf = row => row.children.map(c => c.textContent);
+
+    test("carries the full list in a title, for anyone with a pointer", () => {
+        const undo = fakeDom();
+        try {
+            const wrap = Render.buildPotBreakdown(pots, [], nameFor);
+            const who = wrap.children.map(row => row.children[2]);
+            assert.equal(who[0].title, "Pa, Pb, Pc, Pd");
+            assert.equal(who[1].title, "Pc, Pd");
+            // The visible text is the short form; the title is the long one. A tooltip
+            // is not a mechanism a keyboard reaches, which is why it is the extra and
+            // not the answer.
+            assert.equal(who[0].textContent, "all 4");
+            assert.equal(who[1].textContent, "2 in, Pc and Pd");
+        } finally { undo(); }
+    });
+
+    test("puts the label, the money and the people in that order", () => {
+        const undo = fakeDom();
+        try {
+            const wrap = Render.buildPotBreakdown(pots, [], nameFor);
+            assert.deepEqual(textOf(wrap.children[0]), ["Main pot", "$300", "all 4"]);
+        } finally { undo(); }
+    });
+
+    test("and an uncalled bet still reads as money going back", () => {
+        // Not an eligibility question — nobody is competing for it — so it keeps its
+        // own wording and gets no title to expand.
+        const undo = fakeDom();
+        try {
+            const wrap = Render.buildPotBreakdown(pots, [{ id: "a", amount: 25 }], nameFor);
+            const row = wrap.children[2];
+            assert.deepEqual(textOf(row), ["Uncalled", "$25", "back to Pa"]);
+            assert.equal(row.children[2].title, "");
+        } finally { undo(); }
+    });
+});

tests/holdem/potBreakdownRoom.test.js

@@ -0,0 +1,229 @@
+// The bar's pot list is not allowed to grow with the table.
+//
+// #actionBar is fixed over the felt, so every pixel it takes is a pixel the table
+// loses — and this list took one row per all-in with no ceiling. Measured on a 360x640
+// phone, five players idle: bar 151px. Six all-in: 303px. Twelve all-in: 411px, which
+// is 64% of the screen, leaving 96px of felt to draw twelve seats in. A fixed overlay
+// whose height depends on the state is a fault whatever it is showing, so the cap is
+// checked here rather than left to whoever next adds an all-in to the audit sweep.
+//
+// The two ends survive because they are the two that are live. Side pots are paid from
+// the newest one back down to the main pot, so the top layer is the next thing that
+// happens and the main pot is the last, and those are the two a dealer says out loud
+// while the chips are stacked — "main pot 7,200, side pot 4,500". The layers between
+// are the middle of that count-down, wanted at showdown, which is the pot wizard, which
+// passes no cap and still lists all of them.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Render, Money, PotCalculator } = require("./load");
+
+const nameFor = id => `P${id}`;
+
+// The same stub potBreakdown.test.js uses — enough of an element to say what the row
+// is made of, and no jsdom in a suite that runs in a second.
+const fakeDom = () => {
+    const make = () => ({
+        className: "", textContent: "", title: "", children: [],
+        classList: { add() {} },
+        appendChild(child) { this.children.push(child); return child; },
+    });
+    global.document = { createElement: make };
+    return () => { delete global.document; };
+};
+
+// A table where everyone is all-in for a different amount, which is the shape that
+// makes the most pot layers — the worst case and the one that was measured. `count`
+// players ladder into `count - 1` layers: two of them share a single undivided pot and
+// the breakdown declines to draw at all, which is why nothing below three appears here.
+const laddered = count => PotCalculator.layers(
+    Array.from({ length: count }, (_, i) => ({
+        id: `s${i}`, contribution: 100 + i * 130, folded: false,
+    })));
+
+const build = (pots, options) => {
+    const undo = fakeDom();
+    try {
+        const wrap = Render.buildPotBreakdown(pots, [], nameFor, null, options);
+        return wrap.children.map(row => ({
+            className: row.className,
+            label: row.children[0].textContent,
+            amount: row.children[1].textContent,
+            who: row.children[2].textContent,
+            title: row.children[2].title,
+        }));
+    } finally { undo(); }
+};
+
+describe("the bar's copy of the pot list", () => {
+    test("stops growing once there are more pots than it has room for", () => {
+        // The property that matters: rows are a function of the cap, not of the table.
+        // Twelve-handed and six-handed have to render the same number of lines.
+        for (let players = 3; players <= 12; players++) {
+            const rows = build(laddered(players), { maxLayers: 4 });
+            assert.ok(rows.length <= 4,
+                `${players} all-in drew ${rows.length} rows; the bar is sized for 4`);
+        }
+    });
+
+    test("and the number of rows never depends on how many people are all-in", () => {
+        const wide = [8, 9, 10, 11, 12].map(n => build(laddered(n), { maxLayers: 4 }).length);
+        assert.deepEqual(wide, [3, 3, 3, 3, 3],
+            "past the cap every table should draw main, the elision and the top pot");
+    });
+
+    test("keeps the two pots a dealer actually announces", () => {
+        const pots = laddered(12);
+        const rows = build(pots, { maxLayers: 4 });
+        assert.equal(rows[0].label, pots[0].label, "the main pot is the last one paid");
+        assert.equal(rows[rows.length - 1].label, pots[pots.length - 1].label,
+            "the newest side pot is the first one paid");
+    });
+
+    test("and leaves them in the order the pots were made", () => {
+        const rows = build(laddered(12), { maxLayers: 4 });
+        assert.match(rows[1].className, /potLayerMore/,
+            "the elision belongs where the gap is, not appended after the list");
+    });
+});
+
+describe("the money in the rows that were elided", () => {
+    test("is still on the screen, added up", () => {
+        // The one thing a summary row must not do is lose chips. Whatever is drawn has
+        // to account for every pot, or a dealer counting the announcement against the
+        // chips in the middle finds a shortfall the tool caused.
+        for (let players = 3; players <= 12; players++) {
+            const pots = laddered(players);
+            const total = pots.reduce((sum, pot) => sum + pot.amount, 0);
+            const drawn = build(pots, { maxLayers: 4 })
+                .reduce((sum, row) => sum + Number(row.amount.replace(/[^0-9.]/g, "")), 0);
+            assert.equal(drawn, total,
+                `${players} all-in: rows add to ${drawn}, the pots add to ${total}`);
+        }
+    });
+
+    test("and says how many it stands for", () => {
+        const rows = build(laddered(12), { maxLayers: 4 });
+        const pots = laddered(12);
+        assert.equal(rows[1].label, `${pots.length - 2} more side pots`);
+    });
+
+    test("with the list itself in a title, for anyone with a pointer", () => {
+        const pots = laddered(12);
+        const rows = build(pots, { maxLayers: 4 });
+        pots.slice(1, -1).forEach(pot => {
+            assert.ok(rows[1].title.includes(pot.label),
+                `${pot.label} vanished without trace`);
+            assert.ok(rows[1].title.includes(Money.format(pot.amount)),
+                `${pot.label}'s amount vanished without trace`);
+        });
+    });
+
+    test("and points at where the whole list is", () => {
+        // The title is a pointer affordance, so it cannot be the answer on a phone. The
+        // visible text has to say where the rest lives.
+        assert.match(build(laddered(12), { maxLayers: 4 })[1].who, /resolve/i);
+    });
+});
+
+describe("when eliding would not buy anything", () => {
+    test("a list that fits is left alone", () => {
+        for (let players = 3; players <= 5; players++) {
+            const pots = laddered(players);
+            assert.ok(pots.length <= 4, "this loop is meant to cover the fitting sizes");
+            const rows = build(pots, { maxLayers: 4 });
+            assert.equal(rows.length, pots.length);
+            assert.deepEqual(rows.map(r => r.label), pots.map(p => p.label));
+        }
+    });
+
+    test("and a single middle layer is not replaced by a line saying there is one", () => {
+        // At exactly the cap the middle is one row, and swapping one row for one row is
+        // pure indirection: the dealer loses an amount and gains a sentence.
+        const pots = laddered(5);
+        assert.equal(pots.length, 4, "five all-in ladder into exactly the cap");
+        const rows = build(pots, { maxLayers: 4 });
+        assert.equal(rows.length, 4);
+        assert.ok(!rows.some(r => /potLayerMore/.test(r.className)));
+    });
+});
+
+describe("the wizard, which has room", () => {
+    test("still gets every layer", () => {
+        // Same builder, no cap — this is the announcement read out before anybody shows
+        // a hand, and it is in a dialog that scrolls. Capping it there would hide the
+        // pots at the moment they are being paid.
+        const pots = laddered(12);
+        const rows = build(pots, undefined);
+        assert.equal(rows.length, pots.length);
+        assert.ok(!rows.some(r => /potLayerMore/.test(r.className)));
+    });
+});
+
+// ---- And smaller still once nobody can act -----------------------------------
+//
+// The list is decision support. A player working out whether to call is owed the side
+// pot they would be calling into, and that is worth three rows of a fixed bar.
+//
+// Once everyone is all-in there is no decision left to support: the only thing that
+// happens for the rest of the hand is the dealer turning cards. The list went on
+// standing there anyway, and it is not free — measured at 360x640 with twelve players
+// all-in, the bar was 267px of a 640px window. That is 42%, against the sweep's own
+// "persistent chrome under 30%", and the felt pays it on the exact table shape that has
+// the most seats to fit into what is left.
+//
+// So during a run-out it collapses to the main pot and one line for everything else.
+// The main pot stays because it is the number a dealer says out loud; the layering is
+// what the pot wizard is for, and the summary row has always said so in as many words.
+describe("the list during a run-out, when nobody has a decision left", () => {
+    test("is two rows however many people are all-in", () => {
+        const rows = [3, 6, 9, 12].map(n => build(laddered(n), { maxLayers: 4, summarise: true }).length);
+        assert.deepEqual(rows, [2, 2, 2, 2]);
+    });
+
+    test("and that is fewer than the same table gets while the betting is live", () => {
+        // The point of the change, stated as a comparison rather than a constant, so it
+        // still means something if the ordinary cap is ever retuned.
+        const live = build(laddered(12), { maxLayers: 4 }).length;
+        const runout = build(laddered(12), { maxLayers: 4, summarise: true }).length;
+        assert.ok(runout < live, `a run-out should be shorter than live betting (${runout} vs ${live})`);
+    });
+
+    test("still names the main pot, which is the one said out loud", () => {
+        const pots = laddered(12);
+        const rows = build(pots, { maxLayers: 4, summarise: true });
+        assert.equal(rows[0].label, pots[0].label);
+        assert.equal(rows[0].amount, Money.format(pots[0].amount));
+    });
+
+    test("and still accounts for every chip", () => {
+        // The same rule as the elision above, and the one a summary row must not break:
+        // a dealer counting the announcement against the chips in the middle must not
+        // find a shortfall the tool invented.
+        for (let players = 3; players <= 12; players++) {
+            const pots = laddered(players);
+            const total = pots.reduce((sum, pot) => sum + pot.amount, 0);
+            const drawn = build(pots, { maxLayers: 4, summarise: true })
+                .reduce((sum, row) => sum + Number(row.amount.replace(/[^0-9.]/g, "")), 0);
+            assert.equal(drawn, total,
+                `${players} all-in: rows add to ${drawn}, the pots add to ${total}`);
+        }
+    });
+
+    test("says how many side pots it stands for, and counts them properly at one", () => {
+        const many = build(laddered(12), { maxLayers: 4, summarise: true });
+        assert.equal(many[1].label, `${laddered(12).length - 1} side pots`);
+
+        // Three players ladder into two pots: a main and exactly one side.
+        const one = build(laddered(3), { maxLayers: 4, summarise: true });
+        assert.equal(one[1].label, "1 side pot", "a single side pot is not '1 side pots'");
+    });
+
+    test("and points at where the full list actually is", () => {
+        const rows = build(laddered(12), { maxLayers: 4, summarise: true });
+        assert.match(rows[1].who, /resolve/,
+            "the row that hides the layers has to say where they went");
+        assert.match(rows[1].title, /Side pot/,
+            "and a pointer still gets the full list without resolving anything");
+    });
+});

tests/holdem/potCalculator.test.js

@@ -122,3 +122,63 @@ describe("PotCalculator.resolveRound", () => {
         assert.throws(() => PotCalculator.resolveRound(entries, ["ghost"]), /No valid winners/);
     });
 });
+
+// The pots come out of layers() in one order and with one relationship between them,
+// and the action bar's wording now depends on both. If eligibility were not nested,
+// "8 in, not Mike and Bob" would be a lie — there would be someone eligible for a side
+// pot who was never eligible for the main one, and naming the complement would hide
+// them. It is a property of how the layers are built rather than an accident of the
+// examples above, so it is checked as one.
+describe("pot eligibility is nested", () => {
+    function rng(seed) {
+        let s = seed >>> 0;
+        return () => {
+            s = (s * 1664525 + 1013904223) >>> 0;
+            return s / 4294967296;
+        };
+    }
+
+    test("every side pot's players are a strict subset of the pot below it", () => {
+        const random = rng(20260905);
+        let multiPotTables = 0;
+        let pairs = 0;
+
+        for (let table = 0; table < 20000; table++) {
+            const n = 2 + Math.floor(random() * 11);
+            const players = Array.from({ length: n }, (_, i) => p(
+                `p${i}`,
+                // A sixth of the table never puts anything in, which is a table mid-deal.
+                random() < 1 / 6 ? 0 : (1 + Math.floor(random() * 8)) * 25,
+                random() < 0.2));
+
+            const layers = PotCalculator.layers(players);
+            if (layers.length > 1) multiPotTables++;
+
+            for (let i = 1; i < layers.length; i++) {
+                const below = layers[i - 1].eligible;
+                const belowSet = new Set(below);
+                const here = layers[i].eligible;
+                pairs++;
+                assert.ok(here.every(id => belowSet.has(id)),
+                    `table ${table}: ${layers[i].label} has a player ${layers[i - 1].label} does not\n` +
+                    JSON.stringify(players));
+                assert.ok(here.length < below.length,
+                    `table ${table}: ${layers[i].label} is no smaller than ${layers[i - 1].label} — ` +
+                    `layers with the same eligibility are supposed to be merged into one pot\n` +
+                    JSON.stringify(players));
+            }
+        }
+
+        // Guards the generator rather than the code: a shape that stopped producing side
+        // pots would make every assertion above vacuous and the test would still pass.
+        assert.ok(multiPotTables > 10000, `only ${multiPotTables} tables had a side pot`);
+        assert.ok(pairs > 20000, `only ${pairs} adjacent pairs to check`);
+    });
+
+    test("so the main pot is everyone still live, and it is the widest", () => {
+        const layers = PotCalculator.layers([p("a", 100), p("b", 40), p("c", 100), p("d", 25)]);
+        assert.deepEqual(layers[0].eligible.sort(), ["a", "b", "c", "d"]);
+        layers.slice(1).forEach(layer =>
+            assert.ok(layer.eligible.length < layers[0].eligible.length));
+    });
+});

tests/holdem/rake.test.js

@@ -0,0 +1,230 @@
+// The house's cut.
+//
+// A game that rakes has chips leaving the table every hand, and the bank check used to
+// call them missing: buy-ins in, chips on the felt, and a dealer told somebody had been
+// paid for chips they never got. The cut is the one thing here that is supposed to go
+// and not come back.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Money, HoldemState, Betting, makeTable, chipsOnTable } = require("./load");
+
+const raking = (rake, extra = {}) => {
+    const state = makeTable({ seatCount: 6, stack: 200, ...extra });
+    state.rake = { percent: 0, cap: null, noFlopNoDrop: true, ...rake };
+    return state;
+};
+
+describe("what the house takes", () => {
+    test("nothing, unless somebody says otherwise", () => {
+        const state = makeTable({ seatCount: 6 });
+        assert.equal(state.rake.percent, 0);
+        assert.equal(HoldemState.rakeOn(state, 100), 0);
+    });
+
+    test("a percentage of the pot", () => {
+        assert.equal(HoldemState.rakeOn(raking({ percent: 5 }), 100), 5);
+        assert.equal(HoldemState.rakeOn(raking({ percent: 10 }), 60), 6);
+    });
+
+    test("no more than the cap", () => {
+        const state = raking({ percent: 5, cap: 5 });
+        assert.equal(HoldemState.rakeOn(state, 100), 5);
+        assert.equal(HoldemState.rakeOn(state, 400), 5, "still five on a pot four times the size");
+        assert.equal(HoldemState.rakeOn(state, 40), 2, "under the cap it is just the percentage");
+    });
+
+    test("no flop, no drop", () => {
+        const state = raking({ percent: 5 });
+        assert.equal(HoldemState.rakeOn(state, 100, false), 0, "hand ended before the flop");
+        assert.equal(HoldemState.rakeOn(state, 100, true), 5);
+    });
+
+    test("unless the house rakes every pot", () => {
+        const state = raking({ percent: 5, noFlopNoDrop: false });
+        assert.equal(HoldemState.rakeOn(state, 100, false), 5);
+    });
+
+    test("nothing it can't make out of the table's chips, rounded the players' way", () => {
+        // 5% of $30 is $1.50, and this table's smallest chip is a dollar.
+        const state = raking({ percent: 5 });
+        assert.equal(HoldemState.rakeOn(state, 30), 1);
+        // 5% of $10 is 50c — under a chip, so the house takes nothing at all.
+        assert.equal(HoldemState.rakeOn(state, 10), 0);
+    });
+
+    test("never more than the pot, whatever gets typed in", () => {
+        assert.equal(HoldemState.rakeOn(raking({ percent: 100 }), 20), 20);
+        assert.equal(HoldemState.rakeOn(raking({ percent: 5, cap: 500 }), 20), 1);
+    });
+
+    test("nothing out of an empty pot", () => {
+        assert.equal(HoldemState.rakeOn(raking({ percent: 5 }), 0), 0);
+    });
+});
+
+describe("taking it out of the pot", () => {
+    const winner = amount => [{ id: "a", label: "Ann", amount }];
+
+    test("one winner just gets the pot less the cut", () => {
+        const { payouts, rake } = HoldemState.applyRake(winner(100), 5);
+        assert.equal(rake, 5);
+        assert.deepEqual(payouts.map(p => p.amount), [95]);
+    });
+
+    test("a split pot shares what's left, in proportion", () => {
+        const { payouts } = HoldemState.applyRake(
+            [{ id: "a", label: "Ann", amount: 60 }, { id: "b", label: "Ben", amount: 40 }], 10);
+        assert.deepEqual(payouts.map(p => p.amount), [54, 36]);
+    });
+
+    test("the rounding leftovers go back to the players, not to the house", () => {
+        // $100 split three ways less $7: 93 doesn't divide evenly, and every cent of
+        // it has to land on somebody.
+        const { payouts, rake } = HoldemState.applyRake([
+            { id: "a", label: "Ann", amount: 34 },
+            { id: "b", label: "Ben", amount: 33 },
+            { id: "c", label: "Cal", amount: 33 },
+        ], 7);
+        assert.equal(rake, 7);
+        assert.equal(Money.round(payouts.reduce((sum, p) => sum + p.amount, 0)), 93);
+    });
+
+    test("what goes out plus what the house keeps is what was in the middle", () => {
+        [[100, 5], [37.5, 1.25], [1000, 0], [9, 9]].forEach(([pot, rake]) => {
+            const result = HoldemState.applyRake(winner(pot), rake);
+            assert.equal(Money.round(result.payouts[0].amount + result.rake), pot, `${pot} less ${rake}`);
+        });
+    });
+
+    test("asking for more than the pot takes the pot, not more", () => {
+        const { payouts, rake } = HoldemState.applyRake(winner(20), 50);
+        assert.equal(rake, 20);
+        assert.deepEqual(payouts.map(p => p.amount), [0]);
+    });
+
+    test("no rake, no change — the same payouts come back", () => {
+        const { payouts, rake } = HoldemState.applyRake(winner(80), 0);
+        assert.equal(rake, 0);
+        assert.deepEqual(payouts.map(p => p.amount), [80]);
+    });
+});
+
+describe("what the box is checked against", () => {
+    test("raked chips are gone but not missing", () => {
+        const state = raking({ percent: 5 });
+        state.seats.forEach(p => { p.buyIns = 200; });
+        const before = HoldemState.bankReconciliation(state);
+        assert.equal(before.balanced, true);
+
+        // The house takes $10 out of the middle: somebody's stack is $10 lighter.
+        state.seats[0].stack = 190;
+        state.rakeTaken = 10;
+        const after = HoldemState.bankReconciliation(state);
+        assert.equal(after.raked, 10);
+        assert.equal(after.balanced, true, "the check still balances");
+    });
+
+    test("and are told apart from the ones that went astray", () => {
+        const state = raking({ percent: 5 });
+        state.seats.forEach(p => { p.buyIns = 200; });
+        state.seats[0].stack = 180;
+        state.rakeTaken = 10;
+        const check = HoldemState.bankReconciliation(state);
+        assert.equal(check.raked, 10);
+        assert.equal(check.difference, -10, "ten dollars really are missing");
+        assert.equal(check.balanced, false);
+    });
+
+    test("a table that has never raked reads exactly as it did before", () => {
+        const state = makeTable({ seatCount: 6 });
+        state.seats.forEach(p => { p.buyIns = 100; p.stack = 100; });
+        const check = HoldemState.bankReconciliation(state);
+        assert.equal(check.raked, 0);
+        assert.equal(check.balanced, true);
+    });
+});
+
+describe("the record of it", () => {
+    test("the hand log keeps the pot as the table saw it, and the cut beside it", () => {
+        const state = raking({ percent: 5 });
+        HoldemState.recordHand(state, [{ id: state.seats[0].id, label: "P1", amount: 95 }], 5);
+        const [entry] = state.handHistory;
+        assert.equal(entry.pot, 100, "the pot in the middle");
+        assert.equal(entry.rake, 5);
+        assert.equal(entry.payouts[0].amount, 95, "what the winner actually took");
+    });
+
+    test("a hand with no rake records a zero rather than nothing", () => {
+        const state = makeTable({ seatCount: 6 });
+        HoldemState.recordHand(state, [{ id: state.seats[0].id, label: "P1", amount: 40 }]);
+        assert.equal(state.handHistory[0].rake, 0);
+        assert.equal(state.handHistory[0].pot, 40);
+    });
+
+    test("a table saved before the house took anything takes nothing", () => {
+        const parsed = JSON.parse(JSON.stringify(makeTable({ seatCount: 6 })));
+        delete parsed.rake;
+        delete parsed.rakeTaken;
+        const migrated = HoldemState.migrate(parsed);
+        assert.equal(migrated.rake.percent, 0);
+        assert.equal(migrated.rake.noFlopNoDrop, true);
+        assert.equal(migrated.rakeTaken, 0);
+    });
+
+    test("nonsense in a saved rake is cleaned up rather than trusted", () => {
+        const parsed = JSON.parse(JSON.stringify(makeTable({ seatCount: 6 })));
+        parsed.rake = { percent: -5, cap: -1, noFlopNoDrop: false };
+        parsed.rakeTaken = -20;
+        const migrated = HoldemState.migrate(parsed);
+        assert.equal(migrated.rake.percent, 0);
+        assert.equal(migrated.rake.cap, null);
+        assert.equal(migrated.rake.noFlopNoDrop, false, "that one is a real choice");
+        assert.equal(migrated.rakeTaken, 0);
+    });
+});
+
+describe("the file the dealer hands over", () => {
+    const { HandHistoryExport } = require("./load");
+
+    test("has a column for what the house took", () => {
+        const state = raking({ percent: 5 });
+        HoldemState.recordHand(state, [{ id: "a", label: "Ann", amount: 95 }], 5);
+        HoldemState.recordHand(state, [{ id: "b", label: "Ben", amount: 40 }], 0);
+
+        // Oldest hand first, and money as bare numbers so a spreadsheet can total it.
+        const csv = HandHistoryExport.toCsv(state.handHistory);
+        const [header, raked, unraked] = csv.split("\n");
+        assert.match(header, /Pot,House take,Payouts/);
+        assert.match(raked, /,100\.00,5\.00,/, "the raked hand says how much was taken");
+        assert.match(unraked, /,40\.00,0\.00,/, "and the unraked one says nothing was");
+    });
+});
+
+describe("a raked hand, end to end", () => {
+    test("the chips add up: stacks plus the house's cut equal what was bought in", () => {
+        // 5/10 blinds, so six callers make a pot big enough for 5% to be a whole chip.
+        // At 1/2 the same hand makes $12, 5% of which is 60c and rounds away to
+        // nothing — which is the rule working, not a hand worth testing the bank on.
+        const state = raking({ percent: 5, cap: 5 }, { smallBlind: 5, bigBlind: 10 });
+        state.seats.forEach(p => { p.buyIns = 200; });
+        Betting.beginHand(state);
+        // Everyone calls the big blind, then it is checked down.
+        state.seats.forEach((p, i) => { if (p.inHand) Betting.putIn(state, i, Betting.toCall(state, p)); });
+        Betting.sweepToHandTotals(state);
+
+        const pot = state.seats.reduce((sum, p) => sum + (Number(p.amountOverride) || 0), 0);
+        const rake = HoldemState.rakeOn(state, pot, true);
+        assert.equal(pot, 60);
+        assert.equal(rake, 3);
+
+        const { payouts } = HoldemState.applyRake([{ id: state.seats[0].id, label: "P1", amount: pot }], rake);
+        state.rakeTaken = rake;
+        HoldemState.recordHand(state, payouts, rake);
+        Betting.creditWinnings(state, payouts);
+        HoldemState.startNextHand(state);
+
+        assert.equal(Money.round(chipsOnTable(state) + state.rakeTaken), 1200);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+    });
+});

tests/holdem/readingTheShowdown.test.js

@@ -0,0 +1,274 @@
+// Reading the showdown: the picker that takes the cards in, and the pot maths that
+// pays somebody on the strength of them.
+//
+// The evaluator is tested to death next door in handRank.test.js. What is tested here
+// is the join — the two places where a correct ranking can still pay the wrong player:
+// a side pot, where the question is asked again of a smaller field, and a card entered
+// in two places, where the ranking is of a deck that does not exist.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { CardPicker, HandRank, HoldemState, PotCalculator, Money, makeTable } = require("./load");
+
+describe("the picker, filling the board", () => {
+    const table = (board = ["", "", "", "", ""]) => {
+        const state = makeTable({ seatCount: 4, stack: 100 });
+        state.board = board;
+        return state;
+    };
+
+    // The sheet's own drawing is the DOM's business; the slot bookkeeping under it is
+    // not, and that is what these ask about.
+    const headless = () => { CardPicker.render = () => {}; CardPicker.close = () => {}; };
+
+    const onBoard = (state, cardIndex = 0, limit = 5) => {
+        headless();
+        CardPicker.state = state;
+        CardPicker.hooks = { onPick: () => {} };
+        CardPicker.target = "board";
+        CardPicker.boardLimit = limit;
+        CardPicker.cardIndex = cardIndex;
+        return CardPicker;
+    };
+
+    const onSeat = (state, seatIndex, cardIndex = 0) => {
+        headless();
+        CardPicker.state = state;
+        CardPicker.hooks = { onPick: () => {} };
+        CardPicker.target = "seat";
+        CardPicker.seatIndex = seatIndex;
+        CardPicker.cardIndex = cardIndex;
+        return CardPicker;
+    };
+
+    test("it only offers the slots that have actually been turned", () => {
+        const state = table();
+        assert.equal(onBoard(state, 0, 3).slotValues().length, 3, "the flop is three");
+        assert.equal(onBoard(state, 0, 4).slotValues().length, 4, "the turn makes four");
+        assert.equal(onBoard(state, 0, 5).slotValues().length, 5);
+    });
+
+    test("a card goes into the board, not into a seat", () => {
+        const state = table();
+        onBoard(state, 1, 3).assign("KD");
+        assert.deepEqual(state.board, ["", "KD", "", "", ""]);
+        assert.deepEqual(state.seats[0].cards, ["", ""]);
+    });
+
+    test("it walks on to the next empty slot, so a flop is three taps", () => {
+        const state = table();
+        const picker = onBoard(state, 0, 3);
+        picker.assign("KD");
+        assert.equal(picker.cardIndex, 1);
+        picker.assign("9C");
+        assert.equal(picker.cardIndex, 2);
+        picker.assign("4S");
+        assert.deepEqual(state.board.slice(0, 3), ["KD", "9C", "4S"]);
+    });
+
+    test("and it does not walk past the slots it was given", () => {
+        // Filling the turn must not run on to the river: that card is still in the deck.
+        const state = table(["KD", "9C", "4S", "", ""]);
+        const picker = onBoard(state, 3, 4);
+        picker.assign("AH");
+        assert.deepEqual(state.board, ["KD", "9C", "4S", "AH", ""]);
+    });
+
+    test("clearing a slot empties that one and nothing else", () => {
+        const state = table(["KD", "9C", "4S", "", ""]);
+        onBoard(state, 1, 3).clearSlot();
+        assert.deepEqual(state.board, ["KD", "", "4S", "", ""]);
+    });
+});
+
+describe("a card cannot be in two places", () => {
+    const table = () => {
+        const state = makeTable({ seatCount: 4, stack: 100 });
+        state.board = ["KD", "9C", "4S", "", ""];
+        state.seats[0].cards = ["AH", "AS"];
+        state.seats[1].cards = ["", ""];
+        return state;
+    };
+
+    const picker = (state, setup) => {
+        CardPicker.state = state;
+        CardPicker.hooks = { onPick: () => {} };
+        setup();
+        return CardPicker;
+    };
+
+    test("the board's cards are unavailable to a hand", () => {
+        // The half of this that did not exist before: the picker knew about every
+        // player's cards and nothing about the middle of the table, so the king of
+        // diamonds on the flop could be dealt to somebody as well.
+        const state = table();
+        const used = picker(state, () => {
+            CardPicker.target = "seat";
+            CardPicker.seatIndex = 1;
+            CardPicker.cardIndex = 0;
+        }).cardsInUse();
+        assert.equal(used.get("KD"), "the board");
+        assert.equal(used.get("9C"), "the board");
+        assert.ok(used.has("AH"), "and the other players' are still in there");
+    });
+
+    test("and a hand's cards are unavailable to the board", () => {
+        const state = table();
+        const used = picker(state, () => {
+            CardPicker.target = "board";
+            CardPicker.boardLimit = 5;
+            CardPicker.cardIndex = 3;
+        }).cardsInUse();
+        assert.ok(used.has("AH"), "the ace in seat 1's hand");
+        assert.ok(used.has("KD"), "and the rest of the board");
+    });
+
+    test("but the slot being edited is not competing with itself", () => {
+        const state = table();
+        const used = picker(state, () => {
+            CardPicker.target = "board";
+            CardPicker.boardLimit = 3;
+            CardPicker.cardIndex = 0;
+        }).cardsInUse();
+        assert.equal(used.has("KD"), false, "re-picking what is already there is not a duplicate");
+        assert.equal(used.has("9C"), true);
+    });
+
+    test("the same goes for a seat's own slot", () => {
+        const state = table();
+        const used = picker(state, () => {
+            CardPicker.target = "seat";
+            CardPicker.seatIndex = 0;
+            CardPicker.cardIndex = 0;
+        }).cardsInUse();
+        assert.equal(used.has("AH"), false);
+        assert.equal(used.has("AS"), true, "the player's other card still is");
+    });
+});
+
+describe("who wins a side pot", () => {
+    // The case a single ranking of the whole table gets wrong. The best hand takes the
+    // main pot and is then out of the question: the side pot goes to the best of who is
+    // left, which is a different answer, and it is the answer the wizard has to ask for
+    // again each round rather than reading off one list.
+    //
+    // Three players, and the short stack has the best hand of the three.
+    const board = ["KD", "9C", "4S", "AH", "2H"];
+    const hands = {
+        short: ["9H", "9S"],   // trips — the best hand at the table
+        big: ["AS", "KC"],     // two pair, aces and kings
+        other: ["AC", "3D"],   // a pair of aces
+    };
+
+    const entries = () => PotCalculator.buildEntries([
+        { id: "short", contribution: 20, folded: false },
+        { id: "big", contribution: 100, folded: false },
+        { id: "other", contribution: 100, folded: false },
+    ]);
+
+    // What the wizard does: read the hands still in for *this* round.
+    const readRound = state => HandRank.showdown(board,
+        PotCalculator.getContenders(state).map(c => ({ id: c.id, cards: hands[c.id] })));
+
+    test("the short stack takes the main pot with the best hand", () => {
+        const round = readRound(entries());
+        assert.equal(round.complete, true);
+        assert.deepEqual(round.winners, ["short"]);
+    });
+
+    test("and the side pot goes to the best of the two who are left", () => {
+        const first = PotCalculator.resolveRound(entries(), ["short"]);
+        // 20 from each of three: the short stack is paid 60 and is out of it.
+        assert.equal(Money.round(first.perWinner[0].amount), 60);
+
+        const round = readRound(first.updatedEntries);
+        assert.deepEqual(round.winners, ["big"],
+            "not the trips, which are no longer eligible for this money");
+        assert.equal(round.players.length, 2, "and the short stack is not even offered");
+
+        const second = PotCalculator.resolveRound(first.updatedEntries, ["big"]);
+        assert.equal(Money.round(second.perWinner[0].amount), 160);
+    });
+
+    test("every chip is accounted for across the two rounds", () => {
+        const first = PotCalculator.resolveRound(entries(), ["short"]);
+        const second = PotCalculator.resolveRound(first.updatedEntries, ["big"]);
+        assert.equal(Money.round(first.payoutPool + second.payoutPool), 220);
+        assert.equal(PotCalculator.getContenders(second.updatedEntries).length, 0);
+    });
+});
+
+describe("what it refuses to answer", () => {
+    const board = ["KD", "9C", "4S", "AH", "2H"];
+
+    test("a folded player's cards are not in the running", () => {
+        // They are not a contender, so they are never handed in — which means a hand
+        // that would have won cannot take a pot its owner threw away.
+        const table = PotCalculator.buildEntries([
+            { id: "live", contribution: 50, folded: false },
+            { id: "mucked", contribution: 50, folded: true },
+        ]);
+        const contenders = PotCalculator.getContenders(table);
+        assert.deepEqual(contenders.map(c => c.id), ["live"]);
+
+        const round = HandRank.showdown(board, contenders.map(c => ({ id: c.id, cards: ["7C", "5D"] })));
+        assert.deepEqual(round.winners, ["live"], "even holding nothing");
+    });
+
+    test("one hand not turned over and it hands the question back", () => {
+        const round = HandRank.showdown(board, [
+            { id: "a", cards: ["9H", "9S"] },
+            { id: "b", cards: ["", ""] },
+        ]);
+        assert.equal(round.complete, false);
+        assert.deepEqual(round.winners, []);
+        assert.deepEqual(round.unknown, ["b"]);
+    });
+
+    test("a board still being dealt is not a showdown", () => {
+        const round = HandRank.showdown(["KD", "9C", "4S", "", ""], [
+            { id: "a", cards: ["9H", "9S"] },
+            { id: "b", cards: ["AS", "KC"] },
+        ]);
+        assert.equal(round.complete, false);
+        assert.deepEqual(round.winners, []);
+    });
+
+    test("a card entered twice stops it rather than guessing", () => {
+        // The failure mode that matters: a mis-typed card produces a hand that ranks
+        // perfectly well and is not the one on the table. Refusing is the only honest
+        // answer, and the dealer picks the winner the way they always could.
+        const round = HandRank.showdown(board, [
+            { id: "a", cards: ["9H", "9S"] },
+            { id: "b", cards: ["KD", "QC"] },   // the king of diamonds is on the board
+        ]);
+        assert.equal(round.duplicated, true);
+        assert.equal(round.complete, false);
+        assert.deepEqual(round.winners, []);
+    });
+
+    test("and two players holding the same card is caught as well", () => {
+        const round = HandRank.showdown(board, [
+            { id: "a", cards: ["QH", "QS"] },
+            { id: "b", cards: ["QH", "JC"] },
+        ]);
+        assert.equal(round.duplicated, true);
+        assert.equal(round.complete, false);
+    });
+});
+
+describe("a table that never asked for any of this", () => {
+    test("has no board, tracks nothing, and reads no showdown", () => {
+        const state = HoldemState.createDefault();
+        assert.equal(state.trackBoard, false);
+        // Which is what the wizard checks before it reads anything at all — see
+        // readShowdown() in potWizard.js. With it off, an empty board would decline
+        // anyway, so the tool cannot start answering a question nobody asked.
+        const round = HandRank.showdown(state.board, [
+            { id: "a", cards: ["9H", "9S"] },
+            { id: "b", cards: ["AS", "KC"] },
+        ]);
+        assert.equal(round.complete, false);
+        assert.deepEqual(round.winners, []);
+    });
+});

tests/holdem/reducedMotion.test.js

@@ -0,0 +1,282 @@
+// Motion, for the people who asked for less of it.
+//
+// The stylesheet had honoured `prefers-reduced-motion` for a while, and all three places
+// it did were the wrong size of thing: a 2px press-down on a button, a checkbox tick,
+// and the acting seat's pulse. What none of them covered was motion that moves something
+// across the screen — and for anyone with a vestibular disorder that is the part that
+// matters. A button dipping under a thumb is not what makes people ill.
+//
+// Four things were doing it. A seat editor that slides the full height of itself up from
+// off-screen, every time a dealer taps a chair. A toast that slides in from below. And
+// three `scrollIntoView({ behavior: "smooth" })` calls, which are the most provocative of
+// the lot, because what moves is the whole viewport rather than one control.
+//
+// The scripts are checked here against a stand-in for matchMedia; the stylesheet is
+// checked against its own text, the way the seat footprint rules already are.
+const test = require("node:test");
+const { describe, afterEach } = require("node:test");
+const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
+const { Render } = require("./load");
+
+const CSS = fs.readFileSync(
+    path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "css", "casino", "holdem.css"), "utf8");
+
+// ---- The scripts ------------------------------------------------------------
+
+// Node has no matchMedia at all, so this installs one rather than replacing one. It is
+// defined as a plain value here for the same reason `navigator` had to be defined with
+// defineProperty in wakeLock.test.js: assigning to a global the runtime owns can be a
+// silent no-op, and a test that thinks it installed a fake and didn't passes for the
+// wrong reason.
+const setReducedMotion = wanted => {
+    Object.defineProperty(globalThis, "matchMedia", {
+        value: query => ({
+            matches: wanted && /prefers-reduced-motion:\s*reduce/.test(query),
+            media: query,
+        }),
+        configurable: true,
+        writable: true,
+    });
+};
+
+const unsetMatchMedia = () => { delete globalThis.matchMedia; };
+
+// An element that records what it was asked to do, and nothing else.
+const fakeElement = () => {
+    const calls = [];
+    return { calls, scrollIntoView(options) { calls.push(options); } };
+};
+
+afterEach(unsetMatchMedia);
+
+describe("what the tool reads off the setting", () => {
+    test("a browser asking for less motion is heard", () => {
+        setReducedMotion(true);
+        assert.equal(Render.prefersReducedMotion(), true);
+    });
+
+    test("and one that isn't, isn't", () => {
+        setReducedMotion(false);
+        assert.equal(Render.prefersReducedMotion(), false);
+    });
+
+    test("a browser too old to have the question is not assumed to be answering it", () => {
+        // No matchMedia at all. The safe reading is "no preference stated", which leaves
+        // the tool behaving exactly as it did — not "reduce", which would quietly take
+        // the animation away from everybody on an old browser.
+        unsetMatchMedia();
+        assert.equal(Render.prefersReducedMotion(), false);
+    });
+});
+
+describe("bringing something into view", () => {
+    test("scrolls smoothly when nobody has asked otherwise", () => {
+        setReducedMotion(false);
+        const el = fakeElement();
+        Render.bringIntoView(el, { block: "center" });
+        assert.deepEqual(el.calls, [{ block: "center", behavior: "smooth" }]);
+    });
+
+    test("and jumps when they have", () => {
+        setReducedMotion(true);
+        const el = fakeElement();
+        Render.bringIntoView(el, { block: "center" });
+        assert.deepEqual(el.calls, [{ block: "center", behavior: "auto" }]);
+    });
+
+    test("the caller still chooses where it lands, only not how it gets there", () => {
+        // Each of the three callers wants a different alignment — the raise field
+        // centred, the seat sheet nearest, the sidebar section at the top — and the
+        // helper must not flatten that into one answer.
+        setReducedMotion(true);
+        for (const block of ["center", "nearest", "start"]) {
+            const el = fakeElement();
+            Render.bringIntoView(el, { block });
+            assert.equal(el.calls[0].block, block);
+        }
+    });
+
+    test("a caller that never chose gets a plain scroll rather than an exception", () => {
+        setReducedMotion(false);
+        const el = fakeElement();
+        Render.bringIntoView(el);
+        assert.equal(el.calls[0].behavior, "smooth");
+    });
+
+    test("nothing to scroll is not an error", () => {
+        // main.js reaches for #seatEditorPanel by id and passes whatever it finds.
+        setReducedMotion(true);
+        assert.doesNotThrow(() => Render.bringIntoView(null));
+        assert.doesNotThrow(() => Render.bringIntoView(undefined));
+        assert.doesNotThrow(() => Render.bringIntoView({}));
+    });
+
+    test("the setting is re-read every time, not remembered from page load", () => {
+        // A dealer who turns reduced motion on mid-session should be taken seriously
+        // without reloading the table — and the table is a thing they cannot afford to
+        // reload lightly.
+        setReducedMotion(false);
+        const el = fakeElement();
+        Render.bringIntoView(el, { block: "start" });
+
+        setReducedMotion(true);
+        Render.bringIntoView(el, { block: "start" });
+
+        assert.deepEqual(el.calls.map(c => c.behavior), ["smooth", "auto"]);
+    });
+});
+
+// ---- The stylesheet ---------------------------------------------------------
+
+// Everything inside the @media block whose condition matches, concatenated — there is
+// more than one reduced-motion block in the file and they govern different things.
+const reducedMotionBlocks = (extraCondition = null) => {
+    const found = [];
+    const needle = "@media ";
+    for (let at = CSS.indexOf(needle); at >= 0; at = CSS.indexOf(needle, at + 1)) {
+        const open = CSS.indexOf("{", at);
+        const condition = CSS.slice(at + needle.length, open).trim();
+        if (!/prefers-reduced-motion:\s*reduce/.test(condition)) continue;
+        if (extraCondition && !condition.includes(extraCondition)) continue;
+        let depth = 0;
+        let i = open;
+        for (; i < CSS.length; i++) {
+            if (CSS[i] === "{") depth++;
+            else if (CSS[i] === "}" && --depth === 0) break;
+        }
+        found.push(CSS.slice(open + 1, i));
+    }
+    return found;
+};
+
+describe("the stylesheet stops the things that actually travel", () => {
+    test("there is more than one reduced-motion block, and one of them is for the sheet", () => {
+        assert.ok(reducedMotionBlocks().length >= 2,
+            "the press-down block alone was never the whole job");
+        assert.equal(reducedMotionBlocks("max-width").length, 1,
+            "the seat sheet's override has to carry the same width condition as the rule it beats");
+    });
+
+    test("the toast keeps its fade and loses its travel", () => {
+        const all = reducedMotionBlocks().join("\n");
+        const toast = all.slice(all.indexOf(".toast"));
+        assert.match(toast, /transform:\s*none/,
+            "a toast sliding up from the bottom edge is exactly the motion being asked about");
+        // The guidance is not "delete the animation": something that appears already in
+        // place reads as a rendering glitch rather than as news. Opacity survives.
+        assert.match(toast, /transition:\s*opacity/,
+            "the fade has to stay, or the toast stops reading as something that just happened");
+    });
+
+    test("the seat sheet stops sliding, and stops being painted after it has gone", () => {
+        const [sheet] = reducedMotionBlocks("max-width");
+        assert.ok(sheet, "the sheet override should exist");
+        assert.doesNotMatch(sheet, /transition:[^;]*transform/,
+            "the transform transition is the slide, and it is the largest movement here");
+        // The delay is what kept the slide-out on screen for its own quarter second.
+        // With the slide gone it would leave a sheet that has already jumped away still
+        // painted, which is a flicker rather than a courtesy.
+        const flips = sheet.match(/transition:\s*visibility\s+0s[^;]*/g) || [];
+        assert.equal(flips.length, 2,
+            "both directions need saying: the rule that puts the sheet away and the one that opens it");
+        assert.ok(flips.every(rule => /^transition:\s*visibility\s+0s(\s+linear\s+0s)?\s*$/.test(rule.trim())),
+            `visibility has to flip at once in both directions once there is no slide to cover: ${flips}`);
+        assert.doesNotMatch(sheet, /linear\s+0\.\d+s/,
+            "no leftover delay measured against an animation that no longer runs");
+    });
+});
+
+// ---- And the same rule, applied to whatever the file grows next --------------
+//
+// The three checks above name the things that were wrong. This one is the general
+// version, and it is the one that will still be doing work in a year: it scans the
+// stylesheet for every `:hover` and `:active` transform there is and insists each one
+// has an off switch.
+//
+// Written because the existing block's membership had gone wrong in a way no
+// enumerated test would have caught. It held nine `:active` selectors and looked
+// deliberate, but it had been written to stop a *stuck press state* when a tap turns
+// into a scroll — reaching for the reduced-motion query as the nearest proxy — and
+// solving one problem with another's tool is how it came to cover `.dealerChip` and
+// `.raiseQuickBtn` while missing `.actionBtn`, the class on every button in the action
+// bar, and every `:hover` in the file.
+describe("every hover and press in the file has an off switch", () => {
+    // Selectors that move something under the pointer.
+    //
+    // Parsed as blocks rather than scanned line by line, and that distinction is not
+    // pedantry — the line-by-line version was written first and a fault injection walked
+    // straight past it. A rule written on one line puts its selector and its declaration
+    // in the same string, so neither "this line opens a rule" nor "this line is a
+    // transform" matched, and the scan reported a clean file while the lift it was meant
+    // to find sat in plain sight.
+    //
+    // The pattern matches innermost blocks only: a selector cannot contain braces, so an
+    // @media wrapper's body never matches and its contents are reached individually.
+    const pointerTransforms = () => {
+        const withoutComments = CSS.replace(/\/\*[\s\S]*?\*\//g, "");
+        const found = [];
+        for (const [, selector, body] of withoutComments.matchAll(/([^{}]+)\{([^{}]*)\}/g)) {
+            const name = selector.trim();
+            if (name.startsWith("@")) continue;
+            if (!name.includes(":hover") && !name.includes(":active")) continue;
+            const moves = body.match(/(^|[;{\s])transform\s*:\s*([^;]+)/);
+            if (!moves || /^none\b/.test(moves[2].trim())) continue;
+            // Split the group. A comma-separated rule is nine separate promises, and
+            // checking the joined string against the reduce block is a test that can only
+            // pass if both lists happen to be written in the same order — which is to say
+            // a test that passes by luck. It also hid three selectors outright: the
+            // line-scanning version kept only the last line of a multi-line group, so
+            // .toastAction, .toastClose and .potWizardChoice were never looked at.
+            for (const one of name.split(",")) {
+                const selector = one.trim().replace(/\s+/g, " ");
+                if (!selector.includes(":hover") && !selector.includes(":active")) continue;
+                found.push({ selector, declaration: moves[2].trim() });
+            }
+        }
+        return found;
+    };
+
+    const reduceText = () => reducedMotionBlocks().join("\n");
+
+    test("there are some to check, or this test is measuring nothing", () => {
+        // The guard the accent check taught us to write: a scan that finds nothing
+        // passes just as green as a scan that finds everything covered.
+        assert.ok(pointerTransforms().length >= 4,
+            "the file should still have hover/press transforms in it");
+    });
+
+    test("and every one of them is turned off under reduced motion", () => {
+        const text = reduceText();
+        // A selector counts as covered when it appears in a reduce block, comma-separated
+        // list and all. Compared with whitespace flattened, because the reduce block puts
+        // each selector on its own line and the rule it answers may not.
+        const flat = text.replace(/\s+/g, " ");
+        const missing = pointerTransforms()
+            .filter(rule => !flat.includes(rule.selector))
+            .map(rule => `${rule.selector} { transform: ${rule.declaration} }`);
+        assert.deepEqual(missing, [],
+            `these move under the pointer with no reduced-motion escape:\n  ${missing.join("\n  ")}`);
+    });
+
+    test("including the one a dealer touches most", () => {
+        // Named on its own as well as caught by the scan, because this is the specific
+        // omission that prompted the scan: Fold, Call, Raise and Post blinds & deal all
+        // carry .actionBtn, and it was the one control missing from a list of nine.
+        assert.match(reduceText(), /\.actionBtn:active/,
+            "the action bar's own buttons are the most-pressed thing in the tool");
+    });
+
+    test("a looping animation only runs where motion is welcome", () => {
+        // The acting seat breathes. An infinite animation is the one kind that cannot be
+        // waited out, so it has to be inside a no-preference block rather than merely
+        // overridden in a reduce one.
+        const noPreference = CSS.indexOf("@media (prefers-reduced-motion: no-preference)");
+        assert.ok(noPreference > 0, "the pulse should sit behind a no-preference query");
+        const infinite = [...CSS.matchAll(/animation:[^;]*infinite/g)].map(m => m.index);
+        assert.ok(infinite.length > 0, "there should still be a looping animation to check");
+        assert.ok(infinite.every(at => at > noPreference),
+            "every looping animation has to sit inside the no-preference block");
+    });
+});

tests/holdem/runContrastAudit.js

@@ -0,0 +1,287 @@
+// Reads every piece of text on the dealer's page and asks whether it can actually be
+// read, at the size and weight it is actually drawn.
+//
+//   node tests/holdem/runContrastAudit.js [baseUrl]
+//
+// Needs Playwright and a running site, like runUiAudit.js, and is deliberately kept
+// out of the unit suite for the same reason.
+//
+// Why this exists next to the contrast check already in uiAudit.js: that one measures
+// WCAG 2 contrast ratio and the page passes it. WCAG 2's ratio is a luminance gap, and
+// a luminance gap overstates readability once one colour is near black — which is
+// every reading taken on a page whose background is #141414. APCA asks the question
+// the ratio can't. Both numbers are reported, because "passes AA, fails APCA" is the
+// interesting row and hiding either number would hide it.
+//
+// How the background is obtained matters more than the arithmetic. The first version
+// walked the DOM compositing `background-color` up the ancestors, and reported the gold
+// dealer button as black text on a black background at Lc 0.4 — a fault that does not
+// exist on an element anyone can see is legible, because a gradient was doing the
+// painting and `background-color` knew nothing about it. So: paint the page with its
+// text made transparent, screenshot it, and read the background out of the pixels. The
+// text's own client rects come from a Range, not the element box, so a label inside a
+// wide row is sampled where the glyphs are rather than wherever the row happens to end.
+const fs = require("node:fs");
+const os = require("node:os");
+const path = require("node:path");
+const { lc, requiredLc } = require("./apca");
+const { decode, pixelAt } = require("./png");
+
+const BASE = process.argv[2] || "http://localhost:5199";
+
+const VIEWPORTS = [
+    [390, 844, "iPhone 14"],
+    [768, 1024, "iPad"],
+    [1280, 900, "desktop"],
+];
+
+// WCAG 2 relative luminance — the piecewise curve, which is not the one APCA uses.
+function wcagLuminance([r, g, b]) {
+    const f = c => {
+        c /= 255;
+        return c <= 0.04045 ? c / 12.92 : Math.pow((c + 0.055) / 1.055, 2.4);
+    };
+    return 0.2126 * f(r) + 0.7152 * f(g) + 0.0722 * f(b);
+}
+
+function wcagRatio(fg, bg) {
+    const a = wcagLuminance(fg), b = wcagLuminance(bg);
+    return (Math.max(a, b) + 0.05) / (Math.min(a, b) + 0.05);
+}
+
+function seedTable() {
+    const state = HoldemState.createDefault();
+    HoldemState.resizeSeats(state, 9);
+    [["Christopher", 1200], ["Mike from work", 800], ["Alexandra", 1500],
+        ["Bob", 250], ["Dee", 600]].forEach(([name, cash], i) => {
+        state.seats[i].name = name;
+        state.seats[i].inHand = true;
+        state.seats[i].buyIns = cash;
+        state.seats[i].stack = cash;
+    });
+    state.smallBlind = 5;
+    state.bigBlind = 10;
+    state.handNumber = 5;
+    state.handHistory.push({
+        handNumber: 4, timestamp: Date.now(), pot: 120,
+        payouts: [{ id: state.seats[0].id, label: "Christopher", amount: 120 }],
+        ledger: state.seats.slice(0, 5).map(p => ({ id: p.id, name: p.name, in: 30, won: 0 })),
+    });
+    HoldemState.save(state);
+}
+
+// Every text node that is actually painted, with the rect its glyphs occupy.
+function collectText() {
+    const out = [];
+    const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT);
+    let node;
+    while ((node = walker.nextNode())) {
+        const text = node.textContent.trim();
+        if (!text) continue;
+        const el = node.parentElement;
+        if (!el || el.closest("[hidden]")) continue;
+
+        const cs = getComputedStyle(el);
+        if (cs.visibility === "hidden" || cs.display === "none") continue;
+
+        // Anything faded is faded onto what is behind it, and the screenshot already
+        // shows that — but fully transparent text is not text.
+        let opacity = 1;
+        for (let n = el; n && n.nodeType === 1; n = n.parentElement) {
+            opacity *= parseFloat(getComputedStyle(n).opacity);
+        }
+        if (opacity < 0.05) continue;
+
+        const range = document.createRange();
+        range.selectNodeContents(node);
+        const rects = [...range.getClientRects()].filter(r => r.width > 1 && r.height > 1);
+        if (!rects.length) continue;
+        const r = rects[0];
+        if (r.bottom < 0 || r.top > innerHeight || r.right < 0 || r.left > innerWidth) continue;
+
+        const m = cs.color.match(/[\d.]+/g);
+        if (!m) continue;
+
+        out.push({
+            text: text.slice(0, 40),
+            color: [+m[0], +m[1], +m[2]],
+            alpha: m[3] !== undefined ? +m[3] : 1,
+            opacity,
+            px: parseFloat(cs.fontSize),
+            weight: +cs.fontWeight || 400,
+            cls: (el.className && el.className.toString().trim().split(/\s+/)[0]) || el.tagName.toLowerCase(),
+            tag: el.tagName.toLowerCase(),
+            disabled: !!el.closest(":disabled, [disabled], [aria-disabled='true']"),
+            // Sample points along the glyph run, avoiding the very edges where a
+            // border or the next box over would be sampled instead.
+            points: [0.25, 0.5, 0.75].map(t => [r.left + r.width * t, r.top + r.height / 2]),
+        });
+    }
+    return out;
+}
+
+const HIDE_TEXT = `*, *::before, *::after {
+    color: transparent !important;
+    text-shadow: none !important;
+    -webkit-text-stroke-color: transparent !important;
+    caret-color: transparent !important;
+}`;
+
+async function main() {
+    let chromium;
+    try {
+        ({ chromium } = require("playwright"));
+    } catch {
+        console.error("This script needs Playwright: npm i -D playwright && npx playwright install chromium");
+        process.exit(2);
+    }
+
+    const shotDir = fs.mkdtempSync(path.join(os.tmpdir(), "holdem-contrast-"));
+    const browser = await chromium.launch();
+    const context = await browser.newContext({ deviceScaleFactor: 1 });
+    const page = await context.newPage();
+
+    const rows = [];
+
+    for (const [width, height, label] of VIEWPORTS) {
+        await page.setViewportSize({ width, height });
+        await page.goto(`${BASE}/casino/texasholdem`);
+        await page.evaluate(seedTable);
+        await page.goto(`${BASE}/casino/texasholdem`);
+        await page.click("#nextHandBtn");
+        await page.waitForTimeout(300);
+        await page.evaluate(() => {
+            const deal = [...document.querySelectorAll("#actionBar button")]
+                .find(b => /post blinds/i.test(b.textContent));
+            if (deal) deal.click();
+        });
+        await page.waitForTimeout(250);
+        // Open every panel, or the sidebar's hint text — the smallest, faintest text on
+        // the page, and so the most likely to be the thing worth finding — is never
+        // measured at all.
+        await page.evaluate(() => {
+            document.querySelectorAll("details").forEach(d => { d.open = true; });
+        });
+        await page.waitForTimeout(200);
+
+        const items = await page.evaluate(collectText);
+
+        const shot = path.join(shotDir, `${width}x${height}.png`);
+        await page.addStyleTag({ content: HIDE_TEXT });
+        await page.waitForTimeout(120);
+        await page.screenshot({ path: shot });
+        // Undo, so the next viewport starts from a page that still has its text.
+        await page.evaluate(() => {
+            const tags = [...document.querySelectorAll("style")];
+            const injected = tags[tags.length - 1];
+            if (injected && injected.textContent.includes("caret-color: transparent")) injected.remove();
+        });
+
+        const image = decode(fs.readFileSync(shot));
+
+        for (const item of items) {
+            // Most common sampled colour along the run: a median would invent a colour
+            // that is on no pixel, and the mode lands on the flat background wherever
+            // there is one.
+            const tally = new Map();
+            for (const [x, y] of item.points) {
+                const key = pixelAt(image, x, y).join(",");
+                tally.set(key, (tally.get(key) || 0) + 1);
+            }
+            const bg = [...tally.entries()].sort((a, b) => b[1] - a[1])[0][0]
+                .split(",").map(Number);
+
+            // The text's painted colour: its own alpha, and any inherited opacity, both
+            // land it on the background behind it.
+            const a = item.alpha * item.opacity;
+            const fg = item.color.map((c, i) => c * a + bg[i] * (1 - a));
+
+            const measured = Math.abs(lc(fg, bg));
+            const needed = requiredLc(item.px, item.weight);
+            rows.push({
+                viewport: label,
+                ...item,
+                bg, fg: fg.map(Math.round),
+                lc: +measured.toFixed(1),
+                need: +needed.toFixed(0),
+                short: +(needed - measured).toFixed(1),
+                wcag: +wcagRatio(fg, bg).toFixed(2),
+            });
+        }
+    }
+
+    await browser.close();
+    fs.rmSync(shotDir, { recursive: true, force: true });
+
+    // One row per distinct piece of text, worst viewport kept.
+    const byKey = new Map();
+    for (const row of rows) {
+        const key = `${row.cls}|${row.px}|${row.weight}|${row.text}`;
+        const prev = byKey.get(key);
+        if (!prev || row.short > prev.short) byKey.set(key, row);
+    }
+
+    const all = [...byKey.values()].sort((a, b) => b.short - a.short);
+    const live = all.filter(r => !r.disabled);
+    const failing = live.filter(r => r.short > 0);
+    const passesAaFailsApca = failing.filter(r => r.wcag >= 4.5);
+
+    // Two numbers, because they answer different questions and only one of them is a
+    // target anyone can hit here.
+    //
+    // The strict count is every piece of text below the published level for the size and
+    // weight it is drawn at. APCA asks Lc 90 of anything at 12px/400 or below, and this
+    // page is full of 10px and 11px labels that live inside a 58px seat puck. Reaching
+    // Lc 90 there means white on black for micro-labels and a flat, shoutier page; the
+    // honest way to clear it is bigger type, and bigger type is a layout change that
+    // belongs to its own round. So the strict count is reported and not chased.
+    //
+    // The floors are what this page holds itself to: nothing below Lc 60, which is the
+    // published minimum for content text that is not a column, and Lc 75 for a column of
+    // body text. Those are checkable and they are the numbers that moved.
+    const FLOOR = 60, BODY_FLOOR = 75;
+    const belowFloor = live.filter(r => r.lc < FLOOR);
+    const belowBody = live.filter(r => r.lc < BODY_FLOOR);
+    const aaFails = live.filter(r => r.wcag < 4.5);
+    const worst = live.reduce((min, r) => Math.min(min, r.lc), Infinity);
+
+    console.log(`${rows.length} readings, ${all.length} distinct pieces of text`);
+    console.log(`worst contrast anywhere on the page: Lc ${worst.toFixed(1)}`);
+    console.log(`below the Lc ${FLOOR} floor: ${belowFloor.length}`);
+    console.log(`below Lc ${BODY_FLOOR}: ${belowBody.length}`);
+    console.log(`still failing WCAG AA 4.5:1: ${aaFails.length}`);
+    console.log(`below the strict APCA level for their size/weight: ${failing.length}`
+        + ` (${passesAaFailsApca.length} of them pass AA)\n`);
+
+    if (belowFloor.length) {
+        console.log(`=== below the Lc ${FLOOR} floor ===`);
+        belowFloor.sort((a, b) => a.lc - b.lc).forEach(r =>
+            console.log(`  Lc ${String(r.lc).padStart(5)}  ${r.px}px/${r.weight}  ${r.cls}  "${r.text}"`));
+        console.log("");
+    }
+    if (aaFails.length) {
+        console.log("=== still failing WCAG AA ===");
+        aaFails.sort((a, b) => a.wcag - b.wcag).forEach(r =>
+            console.log(`  ${String(r.wcag).padStart(5)}:1  ${r.px}px/${r.weight}  ${r.cls}  "${r.text}"`));
+        console.log("");
+    }
+
+    const show = r => `  Lc ${String(r.lc).padStart(5)} (needs ${String(r.need).padStart(2)},`
+        + ` short ${String(r.short).padStart(5)})  WCAG ${String(r.wcag).padStart(5)}:1`
+        + `  ${r.px}px/${r.weight}  ${r.cls.padEnd(22)} rgb(${r.fg.join(",")}) on rgb(${r.bg.join(",")})`
+        + `  "${r.text}"`;
+
+    console.log("=== worst 30 ===");
+    failing.slice(0, 30).forEach(r => console.log(show(r)));
+
+    const byClass = new Map();
+    failing.forEach(r => {
+        const cur = byClass.get(r.cls);
+        if (!cur || r.short > cur.short) byClass.set(r.cls, r);
+    });
+    console.log(`\n=== ${byClass.size} distinct classes below level ===`);
+    [...byClass.values()].sort((a, b) => b.short - a.short)
+        .forEach(r => console.log(`  ${String(r.short).padStart(5)} short  ${r.px}px/${r.weight}  ${r.cls}`));
+}
+
+main().catch(err => { console.error(err); process.exit(1); });

tests/holdem/runUiAudit.js

@@ -34,26 +34,64 @@ const OVERLAYS = [
 ];
 
 // A table part-way through a real night: long names, uneven stacks, a hand log.
-function seedTable() {
+//
+// Two of them. The sweep ran on one table shape for its whole life — five players at a
+// nine-handed table — and how much room the felt has depends on how many people are
+// sitting down more than on anything a viewport can tell you. A full table is where the
+// seats crowd, and it was never once looked at: measured when it finally was, seventeen
+// of fifty-four tables had one player's name or stack painted under another.
+const PACKED = [["Christopher", 1200], ["Mike from work", 800], ["Alexandra", 1500],
+    ["Bob", 250], ["Dee", 600], ["Sam", 900], ["Priya", 1100], ["Jonathan", 480],
+    ["Al", 2000], ["Katarzyna", 340], ["Ted", 760], ["Wes", 1300]];
+
+const TABLES = [
+    ["half full", 9, [["Christopher", 1200], ["Mike from work", 800], ["Alexandra", 1500],
+        ["Bob", 250], ["Dee", 600]], false],
+    ["packed", 12, PACKED],
+    // The same twelve, every one of them all-in for a different amount. This is the
+    // shape that makes a pot layer per player, and the sweep had never reached it:
+    // every table here was driven with Call and Check, so the side-pot breakdown — the
+    // one thing on the bar whose height depends on the table — was empty at all 294
+    // audits. Measured when it finally was: the bar took 411px of a 640px phone and
+    // left 96px of felt for twelve seats.
+    ["all in", 12, PACKED, false, 12],
+    // The half-full table again, with the board turned on and five cards on it. The
+    // board is furniture in the middle of the felt that nothing else was ever measured
+    // against — and where the middle cannot hold it, it moves to a strip above the
+    // table and takes the felt's height with it, which is the seats' problem too.
+    //
+    // Deliberately the same five players in the same nine chairs as the shape above, so
+    // the only thing that differs between them is the board. A seventh player would have
+    // told us that a seven-handed table crowds, which is true, already known, and not
+    // what this row is here to find out.
+    ["board", 9, [["Christopher", 1200], ["Mike from work", 800], ["Alexandra", 1500],
+        ["Bob", 250], ["Dee", 600]], true],
+];
+
+function seedTable([seats, players, board]) {
     const state = HoldemState.createDefault();
-    HoldemState.resizeSeats(state, 9);
-    [["Christopher", 1200], ["Mike from work", 800], ["Alexandra", 1500], ["Bob", 250], ["Dee", 600]]
-        .forEach(([name, cash], i) => {
-            state.seats[i].name = name;
-            state.seats[i].inHand = true;
-            state.seats[i].buyIns = cash;
-            state.seats[i].stack = cash;
-        });
+    HoldemState.resizeSeats(state, seats);
+    players.forEach(([name, cash], i) => {
+        state.seats[i].name = name;
+        state.seats[i].inHand = true;
+        state.seats[i].buyIns = cash;
+        state.seats[i].stack = cash;
+    });
     state.smallBlind = 5;
     state.bigBlind = 10;
     for (let hand = 1; hand <= 4; hand++) {
         state.handHistory.push({
             handNumber: hand, timestamp: Date.now(), pot: 120,
-            payouts: [{ id: state.seats[hand % 5].id, label: "P", amount: 120 }],
-            ledger: state.seats.slice(0, 5).map(p => ({ id: p.id, name: p.name, in: 30, won: 0 })),
+            payouts: [{ id: state.seats[hand % players.length].id, label: "P", amount: 120 }],
+            ledger: state.seats.slice(0, players.length)
+                .map(p => ({ id: p.id, name: p.name, in: 30, won: 0 })),
         });
     }
     state.handNumber = 5;
+    if (board) {
+        state.trackBoard = true;
+        state.board = ["KD", "9C", "4S", "AH", "2H"];
+    }
     HoldemState.save(state);
 }
 
@@ -68,57 +106,179 @@ async function main() {
     }
 
     const browser = await chromium.launch();
-    const page = await browser.newPage();
     const failures = [];
     const warnings = [];
     let checks = 0;
 
-    for (const [width, height, label] of VIEWPORTS) {
-        await page.setViewportSize({ width, height });
+    // Twice over: once with a mouse, once with a thumb. The 44px rule stands itself
+    // down where `hover: hover` says there's a pointer, and a headless desktop browser
+    // is a pointer — so a single pass here has never once measured a touch target,
+    // however many viewports it visited. The phone-sized ones are exactly the pass that
+    // needs it.
+    for (const touch of [false, true]) {
+        const context = await browser.newContext(touch
+            ? { hasTouch: true, isMobile: true, deviceScaleFactor: 3 }
+            : {});
+        const page = await context.newPage();
+        const hand = touch ? "touch" : "mouse";
 
-        await page.goto(`${BASE}/Casino/TexasHoldem`);
-        await page.evaluate(seedTable);
-        await page.goto(`${BASE}/Casino/TexasHoldem`);
-        await page.click("#nextHandBtn");
-        await page.waitForTimeout(300);
-        await page.evaluate(() => document.querySelectorAll("details.sidebarPanel").forEach(d => { d.open = true; }));
-        await page.addScriptTag({ path: AUDIT });
+        for (const [width, height, rawLabel] of VIEWPORTS) {
+            await page.setViewportSize({ width, height });
 
-        const table = await page.evaluate(() => LayoutAudit.runAll());
-        checks++;
-        if (!table.clean) failures.push({ where: `table · ${label} ${width}x${height}`, offenders: table.failed.flatMap(f => f.offenders) });
-        table.warnings.forEach(w => warnings.push(`${label}: ${w}`));
+            for (const [shape, seats, players, board, shoves] of TABLES) {
+                const label = `${rawLabel} · ${shape} · ${hand}`;
+                await page.goto(`${BASE}/Casino/TexasHoldem`);
+                await page.evaluate(seedTable, [seats, players, board]);
+                await page.goto(`${BASE}/Casino/TexasHoldem`);
+                await page.click("#nextHandBtn");
+                await page.waitForTimeout(300);
+                // Deal it, and get chips in front of a few players. The sweep used to
+                // audit a table that had never had a bet on it, so the bets layer was
+                // empty at every viewport it visited and nothing it drew was ever looked
+                // at — which is a third of what is on the felt during a hand.
+                await page.evaluate(() => {
+                    const deal = [...document.querySelectorAll("#actionBar button")]
+                        .find(b => /post blinds/i.test(b.textContent));
+                    if (deal) deal.click();
+                });
+                await page.waitForTimeout(220);
+                // Everyone's whole stack in, which is what stacks up the side pots.
+                // There is no one-tap shove: a player who can't cover the bet gets
+                // "Call all-in", and anyone else has to open the raise pad, take its
+                // All-in preset and confirm.
+                for (let i = 0; i < (shoves || 0); i++) {
+                    const step = await page.evaluate(() => {
+                        const find = re => [...document.querySelectorAll("#actionBar button")]
+                            .find(b => !b.disabled && re.test(b.textContent.trim()));
+                        const short = find(/^Call all-in/);
+                        if (short) { short.click(); return "done"; }
+                        const open = find(/^Raise|^Bet/);
+                        if (!open) return null;
+                        open.click();
+                        return "pad";
+                    });
+                    if (!step) break;
+                    await page.waitForTimeout(120);
+                    if (step === "pad") {
+                        await page.evaluate(() => {
+                            const find = re => [...document.querySelectorAll("#actionBar button")]
+                                .find(b => !b.disabled && re.test(b.textContent.trim()));
+                            const max = find(/^All-in/);
+                            if (max) max.click();
+                            const go = find(/^Raise to|^Bet/);
+                            if (go) go.click();
+                        });
+                        await page.waitForTimeout(120);
+                    }
+                }
+                for (let i = 0; i < (shoves ? 0 : 3); i++) {
+                    const acted = await page.evaluate(() => {
+                        const btn = [...document.querySelectorAll("#actionBar button")]
+                            .find(b => /^(Call|Check)/.test(b.textContent.trim()) && !b.disabled);
+                        if (!btn) return false;
+                        btn.click();
+                        return true;
+                    });
+                    if (!acted) break;
+                    await page.waitForTimeout(120);
+                }
+                if (board) {
+                    await page.evaluate(() => {
+                        const s = HoldemState.load();
+                        s.street = "river";
+                        s.board = ["KD", "9C", "4S", "AH", "2H"];
+                        s.seats.filter(p => p.inHand).forEach((p, i) => {
+                            p.cards = [["AS", "KC"], ["AC", "3D"], ["9H", "9S"],
+                                       ["7C", "5D"], ["JD", "TS"]][i] || ["", ""];
+                        });
+                        HoldemState.save(s);
+                    });
+                    await page.reload();
+                    await page.waitForTimeout(300);
+                }
+                await page.evaluate(() => document.querySelectorAll("details.sidebarPanel").forEach(d => { d.open = true; }));
+                await page.addScriptTag({ path: AUDIT });
 
-        for (const [name, open] of OVERLAYS) {
-            await page.evaluate(open);
-            await page.waitForTimeout(180);
-            checks++;
-            const result = await page.evaluate(() => {
-                const overlay = [...document.querySelectorAll("[id$='Overlay']")].find(o => !o.hidden);
-                if (!overlay) return { offenders: [] };
-                return LayoutAudit.occlusion(`#${overlay.id} button, #${overlay.id} a, #${overlay.id} input`);
-            });
-            await page.evaluate(() => document.querySelectorAll("[id$='Overlay']").forEach(o => { o.hidden = true; }));
-            if (result.offenders.length) failures.push({ where: `${name} · ${label} ${width}x${height}`, offenders: result.offenders });
+                const table = await page.evaluate(() => LayoutAudit.runAll());
+                checks++;
+                if (!table.clean) failures.push({ where: `table · ${label} ${width}x${height}`, offenders: table.failed.flatMap(f => f.offenders) });
+                table.warnings.forEach(w => warnings.push(`${label}: ${w}`));
+
+                // The raise pad, which is part of the bar rather than an overlay and so
+                // was never once measured by any of this. It is the tallest thing the
+                // bar ever holds and the only place in the tool a dealer types an
+                // amount, and it had a 36px-tall field on every phone in the list: the
+                // `hover: none` rule that sizes fields for a thumb names the settings
+                // panels and the seat form, and the one field on the thumb surface was
+                // not in the list. Nothing here could see that, because nothing here
+                // ever opened it.
+                if (await page.evaluate(() => {
+                    const btn = [...document.querySelectorAll("#actionBar button")]
+                        .find(b => /^Raise|^Bet/.test(b.textContent.trim()) && !b.disabled);
+                    if (!btn) return false;
+                    btn.click();
+                    return true;
+                })) {
+                    await page.waitForTimeout(200);
+                    checks++;
+                    const pad = await page.evaluate(() => LayoutAudit.runAll({
+                        occlusionSelector: "#actionBar button, #actionBar input",
+                    }));
+                    if (!pad.clean) {
+                        failures.push({
+                            where: `raise pad · ${label} ${width}x${height}`,
+                            offenders: pad.failed.flatMap(f => f.offenders),
+                        });
+                    }
+                    await page.evaluate(() => {
+                        const cancel = [...document.querySelectorAll("#actionBar button")]
+                            .find(b => /^Cancel/.test(b.textContent.trim()));
+                        if (cancel) cancel.click();
+                    });
+                    await page.waitForTimeout(150);
+                }
+
+                // The overlays don't change with the table's shape, so they are only
+                // opened over the half-full one — twice the viewports is enough time
+                // spent already.
+                if (shape !== TABLES[0][0]) continue;
+
+                for (const [name, open] of OVERLAYS) {
+                    await page.evaluate(open);
+                    await page.waitForTimeout(180);
+                    checks++;
+                    const result = await page.evaluate(() => {
+                        const overlay = [...document.querySelectorAll("[id$='Overlay']")].find(o => !o.hidden);
+                        if (!overlay) return { offenders: [] };
+                        return LayoutAudit.occlusion(`#${overlay.id} button, #${overlay.id} a, #${overlay.id} input`);
+                    });
+                    await page.evaluate(() => document.querySelectorAll("[id$='Overlay']").forEach(o => { o.hidden = true; }));
+                    if (result.offenders.length) failures.push({ where: `${name} · ${label} ${width}x${height}`, offenders: result.offenders });
+                }
+            }
         }
-    }
 
-    for (const [width, height, label] of VIEWPORTS.filter((_, i) => i % 4 === 0)) {
-        await page.setViewportSize({ width, height });
-        await page.goto(`${BASE}/Casino/TexasHoldem/QuickSplit`);
-        await page.evaluate(() => {
-            const button = [...document.querySelectorAll("button")].find(b => /all.?in/i.test(b.textContent));
-            if (button) button.click();
-        });
-        await page.addScriptTag({ path: AUDIT });
-        checks++;
-        const result = await page.evaluate(() => LayoutAudit.runAll({ occlusionSelector: "main button, main a, main input" }));
-        if (!result.clean) failures.push({ where: `quick split · ${label} ${width}x${height}`, offenders: result.failed.flatMap(f => f.offenders) });
+        for (const [width, height, rawLabel] of VIEWPORTS.filter((_, i) => i % 4 === 0)) {
+            const label = `${rawLabel} · ${hand}`;
+            await page.setViewportSize({ width, height });
+            await page.goto(`${BASE}/Casino/TexasHoldem/QuickSplit`);
+            await page.evaluate(() => {
+                const button = [...document.querySelectorAll("button")].find(b => /all.?in/i.test(b.textContent));
+                if (button) button.click();
+            });
+            await page.addScriptTag({ path: AUDIT });
+            checks++;
+            const result = await page.evaluate(() => LayoutAudit.runAll({ occlusionSelector: "main button, main a, main input" }));
+            if (!result.clean) failures.push({ where: `quick split · ${label} ${width}x${height}`, offenders: result.failed.flatMap(f => f.offenders) });
+            result.warnings.forEach(w => warnings.push(`quick split · ${label}: ${w}`));
+        }
+
+        await context.close();
     }
 
     await browser.close();
 
-    console.log(`${checks} audits across ${VIEWPORTS.length} viewports`);
+    console.log(`${checks} audits across ${VIEWPORTS.length} viewports, with a mouse and with a thumb`);
     warnings.forEach(w => console.log(`  note: ${w}`));
     if (failures.length === 0) {
         console.log("clean");

tests/holdem/seatFootprint.test.js

@@ -0,0 +1,226 @@
+// Whether two seats can end up wanting the same pixels.
+//
+// The felt used to decide this from one number: the straight-line distance between the
+// closest two *neighbouring* seats, judged against a fraction of a puck's width. Both
+// halves of that were wrong, and the running page showed it. Measured across nine
+// viewports and six table sizes:
+//
+//   seventeen of fifty-four tables had one seat's name or stack painted under another
+//   ten of them had the collision between two seats that are not neighbours
+//
+// The second number is the interesting one. On a phone held sideways the felt is 528px
+// wide and 87 tall, the ring is very nearly a straight line, and the seat that lands on
+// top of you is the one across the table — seats 1 and 7, overlapping by 68px, while
+// every neighbouring pair was fine and the check said the table was clean.
+//
+// The first is what a distance test can't fix even looking at every pair: distance has
+// one number in it, and a puck is half again as wide as it is tall. 84px between centres
+// is generous side by side and nowhere near enough on the diagonal.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
+const { Render } = require("./load");
+
+const CSS = fs.readFileSync(
+    path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "css", "casino", "holdem.css"), "utf8");
+
+describe("two boxes on a ring", () => {
+    // A phone held sideways, once the action bar has taken its share: a felt far wider
+    // than it is tall, on which the ring is very nearly a straight line.
+    const felt = { width: 400, height: 70 };
+    const flat = { rx: 44, ry: 42 };
+
+    test("a pair that is not neighbours still counts", () => {
+        // Eight seats, a 48x60 puck. Every neighbouring pair is clear. Seats 1 and 5 are
+        // on top of each other, and so are 2 and 4, and 6 and 8 — the seat that lands on
+        // you here is the one across the table, because the rim doubles back at the ends
+        // of a shape this flat and a long walk apart is no distance at all.
+        assert.equal(Render.seatsCollide(8, felt, flat, 48, 60), true);
+
+        const neighbours = (count, w, h) => {
+            const points = Render.ringPositions(count, flat.rx, flat.ry, felt.width / felt.height)
+                .map(s => ({ x: (s.left / 100) * felt.width, y: (s.top / 100) * felt.height }));
+            return points.some((point, i) => {
+                const next = points[(i + 1) % points.length];
+                return Math.abs(point.x - next.x) < w && Math.abs(point.y - next.y) < h;
+            });
+        };
+        assert.equal(neighbours(8, 48 + Render.SEAT_CLEARANCE_PX, 60 + Render.SEAT_CLEARANCE_PX), false,
+            "no neighbouring pair overlaps, which is exactly why this had to look at all of them");
+    });
+
+    test("and the answer is the box, not a radius", () => {
+        // Two seats 60px apart across and 35px down, with a 64x40 puck. The distance
+        // between them is 69px, so the test this replaces — "are these two further apart
+        // than a puck is wide?" — called it clear. The boxes overlap by 4px by 5px.
+        const boxes = { width: 200, height: 100 };
+        const twoSeats = (dx, dy) => {
+            const original = Render.ringPositions;
+            Render.ringPositions = () => [
+                { left: 50 - (dx / 2 / boxes.width) * 100, top: 50 - (dy / 2 / boxes.height) * 100 },
+                { left: 50 + (dx / 2 / boxes.width) * 100, top: 50 + (dy / 2 / boxes.height) * 100 },
+            ];
+            try {
+                return Render.seatsCollide(2, boxes, flat, 64, 40, 0);
+            } finally {
+                Render.ringPositions = original;
+            }
+        };
+        assert.ok(Math.hypot(60, 35) > 64, "and a distance test would have passed it");
+        assert.equal(twoSeats(60, 35), true, "60 across and 35 down, with a 64x40 puck");
+        assert.equal(twoSeats(60, 45), false, "far enough apart vertically");
+        assert.equal(twoSeats(66, 10), false, "far enough apart horizontally");
+    });
+
+    test("with daylight, so rounded corners don't read as touching", () => {
+        assert.ok(Render.SEAT_CLEARANCE_PX > 0);
+    });
+
+    test("a table nobody is sitting at can't collide with itself", () => {
+        assert.equal(Render.seatsCollide(1, felt, flat, 96, 60), false);
+        assert.equal(Render.seatsCollide(9, null, flat, 96, 60), false);
+    });
+});
+
+describe("the widths the felt may choose from", () => {
+    test("run widest first, because the widest that fits is the one wanted", () => {
+        const widths = Render.seatWidthCandidates();
+        widths.slice(1).forEach((w, i) => assert.ok(w < widths[i], `${widths[i]} then ${w}`));
+    });
+
+    test("and span the whole declared range", () => {
+        const widths = Render.seatWidthCandidates();
+        assert.equal(widths[0], Render.SEAT_WIDTH_MAX);
+        assert.equal(widths[widths.length - 1], Render.SEAT_WIDTH_MIN);
+    });
+
+    test("the floor is still a name, not a smudge", () => {
+        // At 44px the tight layout shows about five characters and an ellipsis. Below
+        // that a puck stops telling the dealer who is sitting there, which is the one
+        // thing on the felt it exists to say.
+        assert.ok(Render.SEAT_WIDTH_MIN >= 44);
+        assert.ok(Render.SEAT_TIGHT_BELOW_PX > Render.SEAT_WIDTH_MIN);
+        assert.ok(Render.SEAT_TIGHT_BELOW_PX < Render.SEAT_WIDTH_MAX);
+    });
+
+    test("and there are few enough of them to measure after every tap", () => {
+        // Each one costs a forced layout. Ten is the budget; the cache carries the rest.
+        assert.ok(Render.seatWidthCandidates().length <= 12);
+    });
+});
+
+describe("what the stylesheet has to keep holding up", () => {
+    test("the puck's width comes from the property, not from a breakpoint", () => {
+        // Three media queries used to declare it — 78px, 64px and 62px — three guesses
+        // at a number that depends on how many people are sitting down, which no media
+        // query can see. The same 390px phone has room for 90px at four seats and 61 at
+        // nine.
+        const declarations = CSS.replace(/\/\*[\s\S]*?\*\//g, "");
+        const seatRules = [...declarations.matchAll(/(^|[,}])\s*(\.seat)\s*\{([^}]*)\}/g)]
+            .map(m => m[3]);
+        const hardWidths = seatRules
+            .flatMap(body => body.match(/(?<![\w-])width:\s*[^;]+/g) || [])
+            .filter(decl => !decl.includes("var(--seatPuckW"));
+        assert.deepEqual(hardWidths, []);
+    });
+
+    test("the puck measures what it says it measures", () => {
+        // As content-box a 64px puck came out 74 across once its padding and border were
+        // counted, and the search compares that number against distances on the felt.
+        const rule = CSS.match(/\n\.seat \{[^}]*\}/);
+        assert.ok(rule, ".seat rule not found");
+        assert.match(rule[0], /box-sizing:\s*border-box/);
+    });
+
+    test("and a blind badge never reaches sideways off its own puck", () => {
+        // This is what makes the footprint the puck and nothing more. The badge's
+        // remaining overhang is vertical, and it points away from the table at both ends
+        // — `top` on the upper arc, `bottom` on the lower — so two seats facing each
+        // other across the felt wear their badges back to back.
+        //
+        // It was not always so: at `left: -6px` the small blind hung off the puck's left
+        // corner, and on an iPhone Pro Max at six seats — pucks not touching at all —
+        // "SB" was painted across the next player's $1,137.
+        const badges = [...CSS.matchAll(/\.(sb|bb|str)Badge\s*\{([^}]*)\}/g)];
+        assert.equal(badges.length, 3, "expected all three blind badges");
+        badges.forEach(([, which, body]) => {
+            const left = body.match(/(?<![\w-])left:\s*(-?[\d.]+)px/);
+            assert.ok(left, `.${which}Badge should place itself horizontally`);
+            assert.ok(Number(left[1]) >= 0,
+                `.${which}Badge sits at ${left[1]}px, off the left of its own puck`);
+        });
+    });
+
+    test("and all three sit in the same place, so there is one spot to look at", () => {
+        // Two badges in two positions means the dealer's eye has to find which of them
+        // this seat is using before it can read which blind it is, forty times a night.
+        // A seat only ever wears one: the blinds are different players by construction,
+        // and the straddle chain starts left of the big blind and stops short of the
+        // small one.
+        const lefts = [...CSS.matchAll(/\.(sb|bb|str)Badge\s*\{([^}]*)\}/g)]
+            .map(([, , body]) => (body.match(/(?<![\w-])left:\s*(-?[\d.]+px)/) || [])[1]);
+        assert.equal(new Set(lefts).size, 1, `badges sit at ${lefts.join(", ")}`);
+    });
+});
+
+describe("the blind badge counts", () => {
+    // It didn't, for a while, and the reasoning had one hole in it. The badge hangs 9px
+    // off the puck and always points away from the table — `top: -9px` on the upper arc,
+    // `bottom: -9px` on the lower — so two seats facing each other across the felt wear
+    // them back to back and it costs nothing. That much is true.
+    //
+    // What was also claimed is that two seats on the *same* arc "wear them at the same
+    // height, offset by exactly as much as the pucks are". True of a straight rail,
+    // false of a ring: neighbours on a curve sit at different heights, so the badge
+    // pointing away from the table on one of them points at the corner of the other.
+    // Measured on the running page, three tables in the sweep had a player's stack
+    // painted under the next player's SB or BB — and the badge outranks everything else
+    // on the felt, so what the dealer reads in that spot is the wrong number entirely.
+    test("a seat needs room for the badge it might be wearing", () => {
+        const puck = { width: 64, height: 40 };
+        assert.deepEqual(Render.seatFootprint(puck),
+            { width: 64, height: 40 + Render.SEAT_BADGE_OVERHANG_PX });
+    });
+
+    test("sideways it costs nothing, because the badge doesn't go sideways", () => {
+        // It sits inside the puck's own width — see "all three sit in the same place"
+        // above, which holds the stylesheet to it.
+        assert.equal(Render.seatFootprint({ width: 64, height: 40 }).width, 64);
+    });
+
+    test("the number here is the number the stylesheet draws", () => {
+        // Two files have to agree about one distance: holdem.css hangs the badge off the
+        // puck by it, render.js charges every chair in the ring for it. They are wired
+        // together by nothing but this test. Drift either way is silent — too small and
+        // badges land on neighbours again, too large and every puck on a nine-handed
+        // phone gives up a size step for clearance nothing needs.
+        const top = CSS.match(/\.blindBadge \{[^}]*?(?<![\w-])top:\s*(-?[\d.]+)px/);
+        const bottom = CSS.match(/\.seat\.seatBelowCentre \.blindBadge \{[^}]*?(?<![\w-])bottom:\s*(-?[\d.]+)px/);
+        assert.ok(top && bottom, "the badge should hang off both arcs");
+        assert.equal(Math.abs(Number(top[1])), Render.SEAT_BADGE_OVERHANG_PX);
+        assert.equal(Math.abs(Number(bottom[1])), Render.SEAT_BADGE_OVERHANG_PX,
+            "the same distance at both ends, or one arc is charged for the other's badge");
+    });
+
+    test("and it is counted once, not once per seat", () => {
+        // seatsCollide is given one box and compares centres against it, so the
+        // separation it asks for is one puck plus one badge. That is exactly right for
+        // two seats on the same arc each wearing one, and generous for the far commoner
+        // case where only one of the two is in the blinds at all. Counting it on both
+        // sides is what made a landscape table unsatisfiable the first time this was
+        // tried, back when that felt was 87px tall.
+        const puck = { width: 64, height: 40 };
+        const grew = Render.seatFootprint(puck).height - puck.height;
+        assert.equal(grew, Render.SEAT_BADGE_OVERHANG_PX);
+        assert.ok(grew < 2 * Render.SEAT_BADGE_OVERHANG_PX);
+    });
+});
+
+describe("with no browser to measure", () => {
+    test("nothing here throws", () => {
+        assert.equal(Render.measuredSeatBox(), null);
+        assert.equal(Render.seatFootprint(null), null);
+    });
+});

tests/holdem/seatPuckShape.test.js

@@ -0,0 +1,125 @@
+// What the ring is allowed to be sized from.
+//
+// Two rows in every seat puck are usually empty — the hole-card line, and the pill that
+// shows what a player has put in. Both used to hold their space anyway, and the pill,
+// which has a background and a pill radius and side padding, painted an 8x11px green
+// lozenge when it had nothing to say: measured on seven of nine seats at an ordinary
+// table, a coloured mark on almost every seat standing for nothing.
+//
+// The space was not free either. seatRingRadii sizes the ring from the tallest puck on
+// it, so two rows nobody had filled were setting how far apart the seats had to sit. On
+// an iPhone 14 nine-handed the puck measured 78x88 with 25px of that reserved for
+// nothing; collapsed, the width search settles on 78x63. Twelve-handed on a Galaxy S8
+// the seats overlapped by 1556px² and now overlap by 87px².
+//
+// The collapse is only safe if the layout re-measures when one of those rows fills,
+// because resolveSeatLayout caches its ten forced layouts against this signature. That
+// is what is checked here: the cache key has to move when the puck's shape can, and
+// stay still when it cannot — a signature that changed on every action would throw the
+// cache away on every tap, which is the cost it exists to avoid.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Render, HoldemState, makeTable } = require("./load");
+
+// seatShapeSignature reads Render.state, so a table has to be hung on it first.
+const signatureOf = state => {
+    const before = Render.state;
+    Render.state = state;
+    try { return Render.seatShapeSignature(); } finally { Render.state = before; }
+};
+
+const table = () => makeTable({ seatCount: 6, stack: 200 });
+
+describe("the signature the ring layout is cached against", () => {
+    test("moves when the first chips go in", () => {
+        // Before the blinds every pill is empty and the pucks are short; after them two
+        // seats are ~15px taller. A ring still sized from the first measurement is sized
+        // for a puck that no longer exists.
+        const state = table();
+        const empty = signatureOf(state);
+        state.seats[1].committed = 10;
+        assert.notEqual(signatureOf(state), empty,
+            "the ring would still be sized for pucks with no amount on them");
+    });
+
+    test("and when a hole card is entered", () => {
+        const state = table();
+        const none = signatureOf(state);
+        state.seats[0].cards = ["AS", "KC"];
+        assert.notEqual(signatureOf(state), none);
+    });
+
+    test("but not again for the second player to put chips in", () => {
+        // The whole point of a boolean over the table. The ring is sized from the
+        // tallest puck on it, so once anybody has an amount the answer cannot change —
+        // and re-measuring here would mean ten forced layouts on every single action.
+        const state = table();
+        state.seats[1].committed = 10;
+        const first = signatureOf(state);
+        state.seats[2].committed = 10;
+        assert.equal(signatureOf(state), first);
+        state.seats[3].committed = 250;
+        assert.equal(signatureOf(state), first);
+    });
+
+    test("nor when an amount merely changes size", () => {
+        const state = table();
+        state.seats[1].committed = 10;
+        const small = signatureOf(state);
+        state.seats[1].committed = 999999;
+        assert.equal(signatureOf(state), small,
+            "a wider number is the amount fitter's problem, not the ring's");
+    });
+
+    test("and it still moves for the things it always moved for", () => {
+        // Renaming can wrap a name onto a second line, and the button's chip floats
+        // into the name's first line, so both change how tall a puck measures.
+        const state = table();
+        const base = signatureOf(state);
+        state.seats[0].name = "Bartholomew Fairweather";
+        const renamed = signatureOf(state);
+        assert.notEqual(renamed, base);
+        state.dealerSeatIndex = (state.dealerSeatIndex + 1) % state.seats.length;
+        assert.notEqual(signatureOf(state), renamed);
+    });
+
+    test("and two tables that differ only in where a name is split stay different", () => {
+        // The names are joined on a control character no name can contain. Joined on
+        // nothing, "ann" + "abel" and "anna" + "bel" are both "annabel" and one of those
+        // tables would be laid out with the other's measurements — different names, so
+        // different wrapping, so different puck heights.
+        //
+        // The first version of this used "Ann"/"Abel" against "Anna"/"Bel", which can
+        // never collide: the capital letters land in different places, so it passed with
+        // the separator taken out and proved nothing at all. Lower case is what makes it
+        // a real test.
+        const a = table();
+        const b = table();
+        a.seats[0].name = "ann"; a.seats[1].name = "abel";
+        b.seats[0].name = "anna"; b.seats[1].name = "bel";
+        assert.notEqual(signatureOf(a), signatureOf(b));
+    });
+});
+
+describe("a table nobody has sat down at", () => {
+    test("has no amounts and no cards on it", () => {
+        // The empty-table case is the one the collapse is most visible on, and it is
+        // also the one where a stray default could quietly keep both rows open forever.
+        const state = HoldemState.createDefault();
+        HoldemState.resizeSeats(state, 9);
+        assert.match(signatureOf(state), /\|$/,
+            "an untouched table should carry neither flag");
+    });
+
+    test("but a table with an ante on it does have an amount", () => {
+        // computeContribution answers for a seat that has never been given a stack —
+        // the table's base pot stands in for it — so a table dealt with "everyone antes
+        // 5" has amounts on its pucks before anybody acts, and the ring has to know.
+        const state = HoldemState.createDefault();
+        HoldemState.resizeSeats(state, 6);
+        state.basePotAmount = 5;
+        state.seats.forEach(p => { p.inHand = true; });
+        assert.match(signatureOf(state), /a$/);
+    });
+});

tests/holdem/seatRing.test.js

@@ -92,6 +92,100 @@ describe("a felt wider than it is tall", () => {
     });
 });
 
+describe("how close the closest two seats come", () => {
+    // What decides whether the pucks shrink. Rim length per seat was the first answer
+    // and it is the wrong question: it measures the walk between two seats, not the
+    // gap. On a long oval the rim doubles back at the ends, so two seats a long walk
+    // apart end up stacked one above the other.
+    const gap = (count, width, height) => Render.closestSeatGapPx(count, { width, height });
+
+    test("a flat table no longer stacks two seats at each end", () => {
+        // 616x96: the landscape felt on a 640x360 phone once the bar has grown. On an
+        // ellipse that flat the end pair came out 25px apart with 64px pucks. The rim
+        // is a stadium at this shape, so an end holds one seat.
+        assert.ok(gap(6, 616, 96) > 70, `${gap(6, 616, 96).toFixed(0)}px apart`);
+        assert.ok(gap(12, 616, 96) > 40, `${gap(12, 616, 96).toFixed(0)}px apart at twelve seats`);
+    });
+
+    test("an ellipse's ends are still closer than its rim suggests, which is why the shape changes", () => {
+        // Same felt, forced through the ellipse the tool uses for rounder tables.
+        const asEllipse = Render.ringAngles(6, 44, 42, 616 / 96).map(angle => ({
+            x: ((50 + 44 * Math.cos(angle)) / 100) * 616,
+            y: ((50 + 42 * Math.sin(angle)) / 100) * 96,
+        }));
+        const closest = asEllipse.reduce((least, point, i) => {
+            const next = asEllipse[(i + 1) % asEllipse.length];
+            return Math.min(least, Math.hypot(point.x - next.x, point.y - next.y));
+        }, Infinity);
+        assert.ok(closest < 70, `${closest.toFixed(0)}px`);
+        assert.ok(gap(6, 616, 96) > closest * 1.3,
+            `stadium ${gap(6, 616, 96).toFixed(0)}px against ellipse ${closest.toFixed(0)}px`);
+    });
+
+    test("a round table's neighbours are about as far apart as the rim says", () => {
+        const rim = (Math.PI * 2 * 0.43 * 400) / 9;
+        assert.ok(Math.abs(gap(9, 400, 400) - rim) < rim * 0.15);
+    });
+
+    test("more seats, less room, in that order", () => {
+        assert.ok(gap(12, 400, 400) < gap(9, 400, 400));
+        assert.ok(gap(9, 400, 400) < gap(6, 400, 400));
+        assert.ok(gap(6, 400, 400) < gap(6, 800, 800), "and a bigger table gives more");
+    });
+
+    test("nothing to measure between fewer than two seats", () => {
+        assert.equal(gap(1, 400, 400), Infinity);
+        assert.equal(gap(9, 0, 0), Infinity);
+    });
+});
+
+describe("which rim a table gets", () => {
+    // An ellipse until the table is much wider than tall, then a stadium: two rails
+    // and a half-round cap at each end, which is how a real poker table is built.
+    const shape = (width, height) => {
+        const aspect = width / height;
+        return 44 * aspect > 42 * Render.STADIUM_RATIO ? "stadium" : "ellipse";
+    };
+
+    test("every layout the tool had keeps the ellipse", () => {
+        assert.equal(shape(844, 608), "ellipse", "desktop");
+        assert.equal(shape(600, 600), "ellipse", "tablet");
+        assert.equal(shape(278, 314), "ellipse", "phone upright");
+        assert.equal(shape(336, 240), "ellipse", "short phone upright");
+    });
+
+    test("a phone on its side gets the stadium", () => {
+        assert.equal(shape(528, 73), "stadium");
+        assert.equal(shape(780, 113), "stadium");
+    });
+
+    test("the cap holds one seat instead of stacking two", () => {
+        // Six seats on a 616x96 rim: the walk between neighbours has to be longer than
+        // the cap, or two of them end up on the same half-circle.
+        const halfWidth = 44 * (616 / 96), halfHeight = 42;
+        const perimeter = 4 * (halfWidth - halfHeight) + 2 * Math.PI * halfHeight;
+        assert.ok(perimeter / 6 > Math.PI * halfHeight, "one seat per cap at six-handed");
+    });
+
+    test("seat one is still at the top centre, and the ring still mirrors", () => {
+        const seats = Array.from({ length: 8 }, (_, i) => Render.positionOnRing(i, 8, 44, 42, 616 / 96));
+        assert.ok(Math.abs(seats[0].left - 50) < 0.01);
+        assert.ok(seats[0].top < 50);
+        for (let seat = 1; seat < 4; seat++) {
+            const mirrored = seats[8 - seat];
+            assert.ok(Math.abs((seats[seat].left - 50) + (mirrored.left - 50)) < 0.01, `seat ${seat} across`);
+            assert.ok(Math.abs(seats[seat].top - mirrored.top) < 0.01, `seat ${seat} down`);
+        }
+    });
+
+    test("nobody is drawn off the felt", () => {
+        Array.from({ length: 12 }, (_, i) => Render.positionOnRing(i, 12, 44, 42, 616 / 96)).forEach((seat, i) => {
+            assert.ok(seat.left >= 5 && seat.left <= 95, `seat ${i + 1} across at ${seat.left.toFixed(1)}%`);
+            assert.ok(seat.top >= 7 && seat.top <= 93, `seat ${i + 1} down at ${seat.top.toFixed(1)}%`);
+        });
+    });
+});
+
 describe("the shape of the ring", () => {
     test("is a mirror image left to right", () => {
         const seats = ringPixels(10, 601, 126);

tests/holdem/seatSheet.test.js

@@ -0,0 +1,234 @@
+// What the seat sheet shows before it is asked.
+//
+// The sheet is the second-most-used surface in the tool — every buy-in, every rename,
+// every correction goes through it — and it was the least finished. Seven things were
+// stacked flat at one weight and all open at once: a name, two status boxes, two
+// hole-card slots, a stack, a five-box chip counter with an override and a total, and a
+// list of custom fields. Measured on a 390px phone it came to 594px, and the three
+// controls a dealer touches on nearly every visit were 132px of that — 22%. The chip
+// counter alone was 174px, the tallest single thing in the sheet, and its five number
+// boxes were told apart by five coloured dots and a `title` attribute, which is a
+// tooltip, which is nothing at all on a phone.
+//
+// Two of these describe layout decisions and are checked as text — the markup for what
+// sits in front of a dealer at rest, the stylesheet for the scrim and the order two
+// bottom-anchored things stack in. The third describes behaviour and is run: which
+// sections stand open is a question about the seat, and the answer is computed.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
+const { Render, makeTable } = require("./load");
+
+const PAGE = fs.readFileSync(
+    path.join(__dirname, "..", "..", "JoshHeaps.Net", "Pages", "Casino", "TexasHoldem.cshtml"), "utf8");
+const CSS = fs.readFileSync(
+    path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "css", "casino", "holdem.css"), "utf8");
+
+const template = id => {
+    const at = PAGE.indexOf(`<template id="${id}">`);
+    assert.ok(at >= 0, `there is no <template id="${id}">`);
+    return PAGE.slice(at, PAGE.indexOf("</template>", at));
+};
+
+// ---------------------------------------------------------------------------
+
+describe("what the sheet puts in front of a dealer at rest", () => {
+    const seatForm = () => template("seatEditorTemplate");
+
+    // Everything the form holds that is *not* inside one of the folded sections. The
+    // <details> blocks are stripped whole, so what is left is the flat part.
+    const alwaysVisible = () => seatForm().replace(/<details[\s\S]*?<\/details>/g, "");
+
+    test("the flat part is the name, the two status boxes and the stack, and nothing else", () => {
+        const flat = alwaysVisible();
+        ["seatNameInput", "inHandCheckbox", "foldCheckbox", "stackInput", "seatBuyIns"]
+            .forEach(cls => assert.ok(flat.includes(cls),
+                `${cls} is what a dealer opens a seat for — it cannot be behind a disclosure`));
+
+        // And the four that used to be up here with them. Each is a job most tables do
+        // once a night or never, and between them they were two thirds of the sheet.
+        ["cardSlot", "chipCounts", "amountOverrideInput", "customFields", "addFieldBtn"]
+            .forEach(cls => assert.ok(!flat.includes(cls),
+                `${cls} is open at rest again — it belongs inside a folded section`));
+    });
+
+    test("every folded section says what it holds and what is in it", () => {
+        const sections = [...seatForm().matchAll(/<details class="([^"]*seatSubPanel[^"]*)">([\s\S]*?)<\/details>/g)];
+        assert.equal(sections.length, 3, "the sheet folds cards, contribution and notes");
+
+        sections.forEach(([, className, markup]) => {
+            const summary = markup.match(/<summary>([\s\S]*?)<\/summary>/);
+            assert.ok(summary, `${className} has no summary to press`);
+            // A name a dealer would recognise, and a place for the one fact that says
+            // whether opening it is worth the tap.
+            assert.match(summary[1], /<span class="seatSubPanelName">[^<]+<\/span>/,
+                `${className}'s summary has no name in it`);
+            assert.match(summary[1], /class="seatGlance/,
+                `${className} says nothing while it is shut`);
+        });
+    });
+
+    test("the chip counter's values are text, not a tooltip", () => {
+        // Five identical number boxes, each worth a different amount, told apart by a
+        // coloured dot and a `title`. A title is a hover, and there is no hover here.
+        // It also meant the wrapping <label> had no text in it, so the boxes had no
+        // accessible name either — five unnamed spinbuttons in a row.
+        assert.match(template("chipCountTemplate"), /class="chipCountValue"/,
+            "the chip's value has to be in the row, where it can be read and announced");
+    });
+});
+
+describe("the sheet is in front of the table, and says so", () => {
+    test("there is a scrim, and it is furniture the desktop panel does not get", () => {
+        assert.match(PAGE, /id="seatSheetScrim"/, "the sheet has nothing behind it");
+        // Above 700px this element is not a scrim for anything — the seat form is a
+        // panel in the sidebar column, with the whole page still live around it.
+        const off = CSS.match(/\.seatSheetGrip,[\s\S]{0,120}?#seatSheetScrim\s*\{\s*display:\s*none/);
+        assert.ok(off, "the scrim has to be off by default, with the sheet's other furniture");
+    });
+
+    test("and it is not called an Overlay, because Modal would adopt it", () => {
+        // Modal.mount() watches every id ending in "Overlay" and makes a dialog of it.
+        // This one is a sidebar panel two thirds of the time.
+        assert.ok(!/id="seatSheet[A-Za-z]*Overlay"/.test(PAGE));
+    });
+
+    test("and it is put away with visibility, not with opacity", () => {
+        // The same lesson the sheet above it already learned about transforms, and the
+        // layout sweep caught it the same way: a fixed, full-window box at `opacity: 0`
+        // is invisible and still entirely there. bottomFurniture() read it as furniture
+        // standing 640px tall at the bottom of a 640px phone, in every state and on
+        // every screen, and asked scroll-padding to reserve the whole window for it.
+        const phone = CSS.slice(CSS.indexOf("@media (max-width: 700px)"));
+        const rule = phone.match(/#seatSheetScrim\s*\{[^}]*\}/);
+        assert.ok(rule, "the phone block should make a scrim of it");
+        assert.match(rule[0], /visibility:\s*hidden/,
+            "opacity alone leaves a full-window fixed element in the layout and the a11y tree");
+    });
+
+    test("the scrim stops where the sheet stops when a phone is on its side", () => {
+        // Fold, Call and Raise are a rail down the right-hand edge in landscape, and the
+        // sheet is deliberately kept clear of it. A scrim that reached across would dim
+        // the one part of the screen the sheet was making room for — and swallow its
+        // taps, which is worse.
+        const landscape = CSS.slice(CSS.indexOf("@media (orientation: landscape) and (max-height: 560px) and (max-width: 900px)"));
+        const rule = landscape.match(/#seatSheetScrim\s*\{[^}]*\}/);
+        assert.ok(rule, "the landscape block never tells the scrim about the rail");
+        assert.match(rule[0], /right:\s*var\(--actionRailW\)/);
+    });
+
+    test("the toast steps over the sheet, and the rule that says so comes last", () => {
+        // Two things are fixed to the bottom of a phone and the toast is the one that
+        // gives way. `body.hasActionBar #toastHost` and `body.seatSheetOpen #toastHost`
+        // have identical specificity, so this is decided by source order and by nothing
+        // else — a copy written above the other would look right and do nothing.
+        const bar = CSS.indexOf("body.hasActionBar #toastHost");
+        const sheet = CSS.indexOf("body.seatSheetOpen #toastHost");
+        assert.ok(bar > 0 && sheet > 0, "both rules should exist");
+        assert.ok(sheet > bar,
+            "at equal specificity the later rule wins, and the sheet is the taller of the two");
+        // Measured, not assumed: the height changes the moment a section is unfolded.
+        assert.match(CSS.slice(sheet, sheet + 240), /var\(--seatSheetHeight/);
+    });
+});
+
+// ---------------------------------------------------------------------------
+
+// The form the disclosures are rendered into, reduced to the two things
+// renderSeatDisclosures asks of it: find a section, find its glance.
+const fakeForm = () => {
+    const sections = {};
+    for (const name of ["cardsPanel", "contributionPanel", "notesPanel"]) {
+        sections[`.${name}`] = {
+            open: false,
+            glance: null,
+            querySelector(selector) {
+                assert.equal(selector, ".seatGlance");
+                return { set textContent(text) { sections[`.${name}`].glance = text; } };
+            },
+        };
+    }
+    return { querySelector: selector => sections[selector] || null, sections };
+};
+
+const disclose = (state, player) => {
+    const form = fakeForm();
+    Render.state = state;
+    Render.renderSeatDisclosures(form, player);
+    return form.sections;
+};
+
+describe("which sections stand open is a question about the seat", () => {
+    test("a seat with nothing on it opens nothing", () => {
+        const state = makeTable({ seatCount: 4, stack: 200 });
+        const sections = disclose(state, state.seats[0]);
+        assert.deepEqual(
+            Object.values(sections).map(s => s.open), [false, false, false],
+            "an empty seat's sheet is three lines and the three fields above them");
+    });
+
+    test("a seat holding cards opens its cards, and names them while shut", () => {
+        const state = makeTable({ seatCount: 4 });
+        state.seats[0].cards = ["as", "kd"];
+        const sections = disclose(state, state.seats[0]);
+        assert.equal(sections[".cardsPanel"].open, true);
+        // Whatever formatCard makes of them — the point is that both are in it.
+        assert.match(sections[".cardsPanel"].glance, /A/);
+        assert.match(sections[".cardsPanel"].glance, /K/);
+    });
+
+    test("a table that asked to be shown the cards opens them before the first one", () => {
+        // Every seat at such a table is about to have two. Opening the slots after the
+        // cards arrive would be opening them one tap too late, every hand.
+        const state = makeTable({ seatCount: 4 });
+        state.trackBoard = true;
+        assert.equal(disclose(state, state.seats[0])[".cardsPanel"].open, true);
+    });
+
+    test("a seat with chips counted opens the count, with the total on the row", () => {
+        const state = makeTable({ seatCount: 4 });
+        const fiver = state.chipLegend.find(chip => chip.value === 5);
+        state.seats[0].chipCounts = { [fiver.id]: 4 };
+        const sections = disclose(state, state.seats[0]);
+        assert.equal(sections[".contributionPanel"].open, true);
+        assert.equal(sections[".contributionPanel"].glance, "$20");
+    });
+
+    test("a typed amount counts as something on the seat too", () => {
+        // Overriding the total is the other way of answering the same question, and a
+        // dealer who typed a number has to be able to see it without hunting.
+        const state = makeTable({ seatCount: 4 });
+        state.seats[0].amountOverride = 60;
+        assert.equal(disclose(state, state.seats[0])[".contributionPanel"].open, true);
+    });
+
+    test("and a zero someone actually typed is not the same as never having typed one", () => {
+        const state = makeTable({ seatCount: 4 });
+        state.seats[0].amountOverride = 0;
+        assert.equal(disclose(state, state.seats[0])[".contributionPanel"].open, true,
+            "0 is a value; only null means the field was left alone");
+    });
+
+    test("a seat with a note on it opens the notes and counts them", () => {
+        const state = makeTable({ seatCount: 4 });
+        state.seats[0].customFields = [{ label: "Owes", value: "$40" }, { label: "", value: "" }];
+        const sections = disclose(state, state.seats[0]);
+        assert.equal(sections[".notesPanel"].open, true);
+        assert.equal(sections[".notesPanel"].glance, "1 note",
+            "an empty row the dealer has not filled in yet is not a note");
+    });
+
+    test("a section is only ever pushed open, never pulled shut", () => {
+        // This runs again after every keystroke in the sheet. A dealer who opened the
+        // chip counter to start counting would have it shut under them on the first
+        // digit if this ever wrote `open = false`.
+        const state = makeTable({ seatCount: 4 });
+        const form = fakeForm();
+        form.sections[".notesPanel"].open = true;
+        Render.state = state;
+        Render.renderSeatDisclosures(form, state.seats[0]);
+        assert.equal(form.sections[".notesPanel"].open, true);
+    });
+});

tests/holdem/seatTapTargets.test.js

@@ -0,0 +1,119 @@
+// The seat holding the dealer button has to still be a seat you can tap.
+//
+// On a fresh table the button is on seat 1, and seat 1 is where the first player goes.
+// Measured on a 390px phone, a 72x46 puck: the dealer chip's invisible tap pad ran from
+// the puck's own centre to its right edge and from its top to 3px off its bottom. The
+// chip's click handler calls stopPropagation, so every tap that landed there reached
+// nothing at all — the seat holding the button kept 52% of its own face, 130 of 276
+// sampled points going to a chip whose only answer was "give the button to the seat
+// that has it". Seating the first player, on the seat a dealer reaches for first, did
+// nothing. Every other seat kept 97%, and the button moves every hand, so the dead puck
+// moved around the table with it.
+//
+// Three things had to agree for that to happen and they are the three checked here: the
+// pad exists, the chip under it is live, and its handler eats the event. The pad is gone
+// (nothing needs it — no finger can reach any chip), the chip that has the button is
+// inert to the pointer, and the handler bails rather than swallowing a tap it has no
+// answer for.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
+
+const src = (...parts) => fs.readFileSync(path.join(__dirname, "..", "..", "JoshHeaps.Net", ...parts), "utf8");
+
+const CSS = src("wwwroot", "css", "casino", "holdem.css");
+const RENDER = src("wwwroot", "js", "casino", "holdem", "render.js");
+const MAIN = src("wwwroot", "js", "casino", "holdem", "main.js");
+const AUDIT = fs.readFileSync(path.join(__dirname, "uiAudit.js"), "utf8");
+
+// The body of every rule written at exactly this selector, concatenated. Every one of
+// them, because the phone block redeclared the chip's pad under the same name and it
+// was the redeclared copy — 44px centred on the disc — that reached furthest in.
+const rulesFor = selector => {
+    const escaped = selector.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
+    const re = new RegExp(`(^|[},])\\s*${escaped}\\s*\\{([^}]*)\\}`, "gm");
+    const bodies = [];
+    let found;
+    while ((found = re.exec(CSS)) !== null) bodies.push(found[2]);
+    return bodies;
+};
+
+// ---------------------------------------------------------------------------
+
+describe("the seat under the dealer button is still a seat", () => {
+    test("the chip has no invisible pad reaching back over its own puck", () => {
+        // Not "a smaller pad". A fixed pad cannot be safe at every puck size: the seat
+        // search hands out pucks from 48px wide to 100-odd depending on the screen and
+        // the number of chairs, and any pad big enough to matter on the large one
+        // covers the middle of the small one.
+        assert.equal(rulesFor(".dealerChip::after").length, 0,
+            "the dealer chip grew a tap pad again — see the note above .dealerChip in holdem.css");
+    });
+
+    test("the chip that has the button takes no taps", () => {
+        const bodies = rulesFor(".dealerChip.active");
+        assert.ok(bodies.length > 0, ".dealerChip.active has no rule at all");
+        assert.ok(bodies.some(body => /pointer-events:\s*none/.test(body)),
+            "the seat holding the button has a live control sitting on it");
+    });
+
+    test("the other chips stay inert until a pointer that can hover arrives", () => {
+        // This is what makes the pad unnecessary rather than merely unwanted. On touch
+        // there is no hover, so no ghost chip is reachable by a finger and the only live
+        // chip is the inert one above. Nothing a thumb can press is 22px.
+        const ghost = rulesFor(".dealerChip:not(.active)");
+        assert.ok(ghost.some(body => /pointer-events:\s*none/.test(body)),
+            "a chip nobody can see is taking taps");
+
+        const hover = CSS.slice(CSS.indexOf("@media (hover: hover)"));
+        const revealed = hover.match(/\.seat:hover\s+\.dealerChip:not\(\.active\)\s*\{([^}]*)\}/);
+        assert.ok(revealed, "hovering a seat no longer offers to put the button there");
+        assert.match(revealed[1], /pointer-events:\s*auto/,
+            "the mouse path to moving the button is gone");
+    });
+
+    test("and the handler does not swallow a tap it has no answer for", () => {
+        // stopPropagation is what turned a pointless control into a hole. It still runs
+        // for the eight seats the button could move to; the ninth returns first.
+        const handler = RENDER.slice(RENDER.indexOf('querySelector(".dealerChip").addEventListener'));
+        const body = handler.slice(0, handler.indexOf("});"));
+        const guard = body.indexOf("dealerSeatIndex");
+        const stop = body.indexOf("stopPropagation");
+        assert.ok(guard >= 0, "the chip's click handler does not check whose button it is");
+        assert.ok(stop >= 0, "the chip stopped guarding the seat behind it from the other chips");
+        assert.ok(guard < stop,
+            "the guard has to come first, or the tap is eaten before anyone decides it meant nothing");
+    });
+
+    test("moving the button to where it already is is not a move", () => {
+        // The keyboard can still reach the chip, and the same no-op would take the
+        // blinds off the felt and re-post the same chips to announce that nothing
+        // happened. The seat menu has always hidden "Give the button" on the seat that
+        // holds it; this is the same rule where the money is.
+        const from = MAIN.indexOf("makeDealer: index =>");
+        assert.ok(from >= 0, "makeDealer is gone or renamed");
+        const body = MAIN.slice(from, MAIN.indexOf("blindsArePosted", from));
+        assert.match(body, /if\s*\(\s*index\s*===\s*state\.dealerSeatIndex\s*\)\s*return/,
+            "makeDealer will re-post the blinds to move the button nowhere");
+    });
+});
+
+describe("the sweep can see this kind of failure now", () => {
+    test("a control inside a seat counts as a rival for the seat's tap", () => {
+        // The layout sweep already had a check named "a seat's centre belongs to that
+        // seat", written after the same chip's pad grew *outward* and started taking
+        // taps from the seat next door. It ran clean through all of this: it waved
+        // through anything the seat contained, and the chip is inside the seat. The
+        // check that existed for this exact bug could not see the second half of it.
+        const from = AUDIT.indexOf("seatOwnership()");
+        assert.ok(from >= 0, "the seat-ownership check is gone");
+        const body = AUDIT.slice(from, AUDIT.indexOf("oneDealerButton()", from));
+
+        assert.match(body, /seat\.contains\(rival\)/,
+            "a seat's own control is being waved through again");
+        assert.doesNotMatch(body, /if\s*\(\s*!hit\s*\|\|\s*seat\.contains\(hit\)/,
+            "the early return that hid this is back: it exempts every descendant, chip included");
+    });
+});

tests/holdem/seatWidthSearch.test.js

@@ -0,0 +1,129 @@
+// How wide a seat puck is allowed to get, and on which screens.
+//
+// The felt grows with the window and the pucks did not: 96px was the only ceiling there
+// was, so nine-handed the seats covered 19% of the felt on a phone, 11% on a 1280px
+// desktop and 8% at 1440px and beyond — with the stack figure a dealer reads sitting at
+// 10px on a 2560px monitor, the same 10px as on a 360px phone.
+//
+// Two things stop the fix from costing more than it buys, and both are checked here.
+//
+// Every candidate width is a forced layout, and raising the ceiling for everybody took
+// the layout pass from 24ms to 73ms on a twelve-handed desktop — so a screen that cannot
+// use the extra widths must not measure them. And a 144px puck on an iPhone's 278px ring
+// is half the width of the table: the first version of this let phones through, and
+// six-handed all six seats sat over the rail by 15px against 5px before, reading as a
+// stack of cards rather than a table with people around it.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Render } = require("./load");
+
+// Ring boxes read off the running page, not invented. #seatsLayer, nine-handed, at the
+// viewports the sweep visits.
+const RINGS = {
+    "Galaxy S8": { width: 233, height: 282 },
+    "iPhone 14": { width: 263, height: 470 },
+    "Pro Max": { width: 303, height: 535 },
+    "phone sideways": { width: 565, height: 257 },
+    iPad: { width: 689, height: 689 },
+    desktop: { width: 857, height: 617 },
+    "desktop 1440": { width: 992, height: 714 },
+};
+const SMALL = ["Galaxy S8", "iPhone 14", "Pro Max", "phone sideways"];
+const LARGE = ["iPad", "desktop", "desktop 1440"];
+
+describe("which felts may have wider pucks at all", () => {
+    test("no phone does, held either way up", () => {
+        // The guarantee the phones are owed: they measure the widths they always
+        // measured and settle on the puck they always settled on.
+        SMALL.forEach(name => {
+            assert.ok(Render.roomyWidthCeiling(RINGS[name]) <= Render.SEAT_WIDTH_MAX,
+                `${name} would be allowed a ${Render.roomyWidthCeiling(RINGS[name])}px puck`);
+            [2, 4, 6, 9, 12].forEach(count => assert.equal(
+                Render.roomForWiderPucks(count, RINGS[name]), false,
+                `${name} ${count}-handed`));
+        });
+    });
+
+    test("and every tablet and desktop does", () => {
+        LARGE.forEach(name => {
+            assert.ok(Render.roomyWidthCeiling(RINGS[name]) > Render.SEAT_WIDTH_MAX, name);
+        });
+    });
+
+    test("with a comfortable margin either side of the line", () => {
+        // The rule is a fifth of the shorter span, and the point of five is that it is
+        // not near either group. If a change to the felt ever moves these together,
+        // this says so before the phones quietly start paying for it.
+        const biggestSmall = Math.max(...SMALL.map(n => Math.min(RINGS[n].width, RINGS[n].height)));
+        const smallestLarge = Math.min(...LARGE.map(n => Math.min(RINGS[n].width, RINGS[n].height)));
+        assert.ok(smallestLarge > biggestSmall * 1.8,
+            `${biggestSmall}px and ${smallestLarge}px are too close for one divisor to separate`);
+        // Every divisor that keeps the phones out is at least the widest phone span over
+        // the ordinary ceiling; every one that lets the tablets in is below the narrowest
+        // large span over the same. 303/96 = 3.2 and 617/96 = 6.4, and five is between.
+        const floor = biggestSmall / Render.SEAT_WIDTH_MAX;
+        const cap = smallestLarge / Render.SEAT_WIDTH_MAX;
+        assert.ok(Render.SEAT_ROOMY_SPAN_RATIO >= floor,
+            `${Render.SEAT_ROOMY_SPAN_RATIO} lets a phone through; it has to be at least ${floor.toFixed(2)}`);
+        assert.ok(Render.SEAT_ROOMY_SPAN_RATIO < cap,
+            `${Render.SEAT_ROOMY_SPAN_RATIO} shuts the tablets out; it has to be under ${cap.toFixed(2)}`);
+    });
+
+    test("and a felt with no size at all is not one of them", () => {
+        assert.equal(Render.roomForWiderPucks(9, null), false);
+        assert.equal(Render.roomForWiderPucks(9, { width: 0, height: 0 }), false);
+    });
+});
+
+describe("the widths a felt actually measures", () => {
+    const widthsFor = (name, count) => Render.seatWidthCandidates(count, RINGS[name]);
+
+    test("a phone measures exactly the ten it measured before", () => {
+        const expected = [];
+        for (let w = Render.SEAT_WIDTH_MAX; w > Render.SEAT_WIDTH_MIN; w -= Render.SEAT_WIDTH_STEP) {
+            expected.push(w);
+        }
+        expected.push(Render.SEAT_WIDTH_MIN);
+        SMALL.forEach(name => [6, 9, 12].forEach(count =>
+            assert.deepEqual(widthsFor(name, count), expected, `${name} ${count}-handed`)));
+    });
+
+    test("a desktop measures a handful more, and no more than a handful", () => {
+        const extra = widthsFor("desktop 1440", 9).length - widthsFor("Galaxy S8", 9).length;
+        assert.ok(extra > 0, "the wider widths never got offered");
+        assert.ok(extra <= 6, `${extra} extra forced layouts is more than this is worth`);
+    });
+
+    test("never wider than the felt's own ceiling", () => {
+        Object.keys(RINGS).forEach(name => [2, 6, 9, 12].forEach(count => {
+            const widest = Math.max(...widthsFor(name, count));
+            assert.ok(widest <= Math.max(Render.SEAT_WIDTH_MAX, Render.roomyWidthCeiling(RINGS[name])),
+                `${name} ${count}-handed offered ${widest}px`);
+            assert.ok(widest <= Render.SEAT_WIDTH_ROOMY_MAX);
+        }));
+    });
+
+    test("always widest first, always down to the floor", () => {
+        // The search takes the first width that fits, so the order is the whole
+        // algorithm — and the floor has to be on the list or a crowded table has
+        // nothing left to fall back to.
+        Object.keys(RINGS).forEach(name => [2, 9, 12].forEach(count => {
+            const widths = widthsFor(name, count);
+            widths.forEach((w, i) => {
+                if (i === 0) return;
+                assert.ok(w < widths[i - 1], `${name}: ${widths.join(", ")} is not descending`);
+            });
+            assert.equal(widths[widths.length - 1], Render.SEAT_WIDTH_MIN);
+        }));
+    });
+
+    test("and a crowded table on a big felt is told no like any other", () => {
+        // Room on the felt is necessary, not sufficient: the seats still have to clear
+        // each other. Enough of them on any ring and the wider widths stop being
+        // offered, which is the arithmetic doing the refusing rather than the
+        // measurement having to.
+        const crowded = [24, 30, 40].map(count => Render.roomForWiderPucks(count, RINGS.desktop));
+        assert.deepEqual(crowded, [false, false, false]);
+    });
+});

tests/holdem/seatsOnTheTable.test.js

@@ -0,0 +1,110 @@
+// How wide the ring of seats is allowed to be.
+//
+// It sat at a flat 44% by 42% of the seat layer at every size — two numbers picked
+// against a phone, then asked to hold for a 754x543 felt on a desktop and a 686x141
+// one on a phone held sideways. A fixed pair can only be right for one ratio of puck
+// to felt, so measured on the running page:
+//
+//   1280x900, nine-handed   five of nine pucks past the table's outer edge, worst 49px
+//   844x390,  six-handed    all six, worst 20px
+//   430x932,  six-handed    two, worst 12px
+//
+// Seats floating off the felt onto the page read as the table being too small for the
+// game rather than as players at a rail, and it was a different amount of wrong on
+// every screen — which is what made it look like a mistake instead of a choice.
+//
+// The radius is derived from what has to fit now. Whether it *actually* fits is a
+// question about a laid-out browser, and it is checked there: uiAudit's "seats and
+// chips stay on the table" runs at every viewport in the sweep. What is checked here
+// is the contract that function has to honour, including the two ways it is allowed
+// to give up.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Render } = require("./load");
+
+describe("with no browser to measure", () => {
+    test("it falls back to the ring the tool has always used", () => {
+        // Every call from this suite has no DOM, and so does the very first render,
+        // before the felt has been laid out. Neither should throw or return nonsense.
+        assert.deepEqual(Render.seatRingRadii(), { rx: Render.RING_MAX_RX, ry: Render.RING_MAX_RY });
+    });
+
+    test("so seatPosition still answers", () => {
+        const pos = Render.seatPosition(0, 9, 1);
+        assert.ok(Number.isFinite(pos.left) && Number.isFinite(pos.top));
+    });
+
+    test("and nothing is measured for the puck height either", () => {
+        assert.equal(Render.tooTallForTheTable(), false);
+    });
+});
+
+describe("the ceiling and the floor", () => {
+    test("the old ring is the widest it can ever be", () => {
+        // Nothing gets looser than it was; this can only pull seats in.
+        assert.ok(Render.RING_MAX_RX <= 44);
+        assert.ok(Render.RING_MAX_RY <= 42);
+    });
+
+    test("and it never collapses the ring into the pot", () => {
+        // A puck wider than the table it sits on has no honest answer. Overhanging is
+        // the lesser evil — seats stacked on the pot would be unreadable, and the
+        // density rule shrinks the pucks before it ever gets this far.
+        assert.ok(Render.RING_MIN_R > 0);
+        assert.ok(Render.RING_MIN_R < Render.RING_MAX_RY);
+    });
+
+    test("with a margin that keeps the outermost seat off the rail", () => {
+        assert.ok(Render.SEAT_EDGE_MARGIN_PX > 0);
+    });
+});
+
+describe("the ring the radii describe", () => {
+    const spread = (radii, count = 9, aspect = 1.4) =>
+        Render.ringPositions(count, radii.rx, radii.ry, aspect);
+
+    test("a smaller radius puts every seat nearer the middle", () => {
+        const wide = spread({ rx: 44, ry: 42 });
+        const tight = spread({ rx: 30, ry: 28 });
+        wide.forEach((seat, i) => {
+            const wideOut = Math.hypot(seat.left - 50, seat.top - 50);
+            const tightOut = Math.hypot(tight[i].left - 50, tight[i].top - 50);
+            assert.ok(tightOut < wideOut, `seat ${i + 1} should have come in`);
+        });
+    });
+
+    test("and the seats stay evenly spread however far in they are", () => {
+        // Pulling the ring in must not bunch them: the spacing rule is arc length, and
+        // shrinking an ellipse uniformly keeps every gap in proportion.
+        const gaps = ring => ring.map((p, i) => {
+            const next = ring[(i + 1) % ring.length];
+            return Math.hypot(p.left - next.left, p.top - next.top);
+        });
+        const tight = gaps(spread({ rx: 30, ry: 28 }));
+        const smallest = Math.min(...tight), largest = Math.max(...tight);
+        assert.ok(largest / smallest < 1.35, `gaps ranged ${smallest.toFixed(1)}..${largest.toFixed(1)}`);
+    });
+});
+
+describe("the bets follow the seats", () => {
+    test("a chip sits on its own player's spoke, proportionally in", () => {
+        // The chip is a fraction of the seat's reach rather than of the felt, so when
+        // the ring pulls in the chips come with it instead of being left by the rail.
+        const radii = { rx: 30, ry: 28 };
+        const seat = Render.seatPosition(2, 8, 1.4, radii);
+        const bet = Render.betPosition(2, 8, 1.4, radii);
+        const seatOut = Math.hypot(seat.left - 50, seat.top - 50);
+        const betOut = Math.hypot(bet.left - 50, bet.top - 50);
+        assert.ok(betOut < seatOut, "the chip is nearer the pot than the player is");
+        assert.ok(betOut > seatOut * 0.4, "but still out on the player's side of the felt");
+    });
+
+    test("and it is the same spoke, not just the same distance", () => {
+        const radii = { rx: 30, ry: 28 };
+        const seat = Render.seatPosition(5, 9, 1.2, radii);
+        const bet = Render.betPosition(5, 9, 1.2, radii);
+        const angleOf = p => Math.atan2(p.top - 50, p.left - 50);
+        assert.ok(Math.abs(angleOf(seat) - angleOf(bet)) < 0.01);
+    });
+});

tests/holdem/selectsOnFocus.test.js

@@ -1,5 +1,6 @@
 // Which fields replace their contents when a dealer reaches for them.
 const test = require("node:test");
+const { describe } = require("node:test");
 const assert = require("node:assert");
 const { Money } = require("./load");
 
@@ -51,3 +52,68 @@ test("nothing at all is not a field", () => {
 test("a field with no type stated is a text box, so it does not", () => {
     assert.equal(Money.selectsOnFocus({ tagName: "INPUT" }), false);
 });
+
+// ---- A scroll is not an edit ------------------------------------------------
+//
+// A focused `<input type="number">` is a spinbutton, and the browser lets the mouse
+// wheel drive it. Measured on the running page at 1280x900 with the sidebar open: focus
+// the small blind and scroll, $5 becomes $5.50. Focus a seat's stack and scroll, $500
+// becomes $501. Both go straight through to the saved table, because these fields save
+// on `input` like everything else here.
+//
+// Nothing is announced and nothing looks wrong. The tool has invented a chip, and the
+// gesture that did it was a dealer reaching for another panel.
+//
+// The rule is narrow on purpose. Every other way of driving a spinbutton is deliberate —
+// the arrow keys, the stepper arrows, typing — and none of them is touched. Scrolling is
+// the one actuation nobody means.
+describe("a wheel over a field the dealer is in", () => {
+    const box = (type, tag = "INPUT") => ({ tagName: tag, type });
+
+    test("a focused number box would be edited by it", () => {
+        const stack = box("number");
+        assert.equal(Money.wheelWouldEdit(stack, stack), true);
+    });
+
+    test("the same box, not focused, would not", () => {
+        // An unfocused spinbutton ignores the wheel. There is nothing to defend, and
+        // blurring something that is not focused is a no-op with a side effect.
+        const stack = box("number");
+        assert.equal(Money.wheelWouldEdit(stack, null), false);
+        assert.equal(Money.wheelWouldEdit(stack, box("number")), false);
+    });
+
+    test("the amount boxes that already moved off type=number are safe as they are", () => {
+        // Add chips, the raise pad and Quick Split use text + inputmode="decimal", which
+        // is not a spinbutton and cannot be scrolled into a different number.
+        const amount = { tagName: "INPUT", type: "text", inputMode: "decimal" };
+        assert.equal(Money.wheelWouldEdit(amount, amount), false);
+        // Still an amount field for the other rule, though — the two questions are
+        // different and this one must not quietly answer both.
+        assert.equal(Money.selectsOnFocus(amount), true);
+    });
+
+    test("a name, a note and a table are left alone", () => {
+        const name = { tagName: "INPUT", type: "text" };
+        const notes = { tagName: "TEXTAREA", type: "textarea" };
+        assert.equal(Money.wheelWouldEdit(name, name), false);
+        assert.equal(Money.wheelWouldEdit(notes, notes), false);
+        assert.equal(Money.wheelWouldEdit(null, null), false);
+        assert.equal(Money.wheelWouldEdit(undefined, undefined), false);
+    });
+
+    test("the type is read case-insensitively, the way an attribute comes back", () => {
+        const shouty = box("NUMBER");
+        assert.equal(Money.wheelWouldEdit(shouty, shouty), true);
+    });
+
+    test("a select is a spinbutton to nobody", () => {
+        // The page has one <select> — which way the blinds move — and it was the obvious
+        // next suspect. It isn't one: focused, hovered and scrolled 300px in Chromium it
+        // stays on "clockwise", because a select only takes the wheel while its dropdown
+        // is open. Checked rather than assumed, and left out rather than defended
+        // against, so this rule keeps meaning exactly one thing.
+        const select = { tagName: "SELECT", type: "select-one" };
+        assert.equal(Money.wheelWouldEdit(select, select), false);
+    });
+});

tests/holdem/showdownCards.test.js

@@ -0,0 +1,147 @@
+// Who the tool asks to turn over, and in what order.
+//
+// The board half of the card feature always worked: every street, a sheet asks which
+// cards came off the deck. The hands half never did. A dealer entered five community
+// cards, pressed the showdown button, and the pot wizard told them "Chris, Mike and
+// Alex haven't turned over, so who won is still yours to say" — with nothing in the
+// sheet to turn anybody over with. The only way in was to close the wizard, tap a seat
+// puck, find the card slots in the seat editor, and repeat it for each player, with the
+// pot sitting on the table.
+//
+// So the showdown button now asks, the same way the street button does. This file is
+// the list it asks from. The sheet itself is DOM and is checked in the browser; the
+// question of who is on the list, and in which order, is state and lives here.
+//
+// Three rules hold it together:
+//
+//   Only when asked for. The setting is off by default and the list is empty when it
+//   is off, so a table that never wanted this never sees a sheet.
+//
+//   Only what isn't known. A hand already entered is an answer already given, and
+//   asking again offers to overwrite it.
+//
+//   In the order the cards actually come over — the showdown order the action bar
+//   already announces, then round the table from there. A dealer looking at the seat
+//   the bar just named should not be asked about the one behind them.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Render, Betting, HoldemState, makeTable } = require("./load");
+
+// A hand played to the river with everyone still in, which is the only shape that
+// has a showdown to ask about.
+const atShowdown = ({ seats = 4, tracking = true } = {}) => {
+    const state = makeTable({ seatCount: seats, stack: 500, smallBlind: 5, bigBlind: 10 });
+    Betting.beginHand(state);
+    state.street = "river";
+    state.board = ["2C", "7D", "9S", "JH", "3S"];
+    state.trackBoard = tracking;
+    state.seats.forEach(player => { player.hasActed = true; });
+    return state;
+};
+
+const queue = state => Render.showdownCardQueue(state);
+
+describe("only when the dealer asked to be asked", () => {
+    test("the setting off means nobody is asked anything", () => {
+        assert.deepStrictEqual(queue(atShowdown({ tracking: false })), []);
+    });
+
+    test("the setting on asks everyone still in", () => {
+        assert.strictEqual(queue(atShowdown()).length, 4);
+    });
+
+    test("a table nobody is sitting at is not a showdown", () => {
+        const state = atShowdown();
+        state.seats.forEach(player => { player.inHand = false; });
+        assert.deepStrictEqual(queue(state), []);
+    });
+});
+
+describe("a hand won without a showdown", () => {
+    // Everyone else folded, so there is one hand left and it never comes over. The
+    // bar says "Award pot to Chris" here, not "Showdown", and asking Chris to turn
+    // over a hand nobody paid to see is asking for a card the tool will never use.
+    test("one player left is asked for nothing", () => {
+        const state = atShowdown();
+        [1, 2, 3].forEach(i => { state.seats[i].folded = true; });
+        assert.deepStrictEqual(queue(state), []);
+    });
+
+    test("two left is a showdown, however it was arrived at", () => {
+        const state = atShowdown();
+        [2, 3].forEach(i => { state.seats[i].folded = true; });
+        assert.strictEqual(queue(state).length, 2);
+    });
+
+    // Everybody all-in on the flop is still a showdown: the cards go on their backs,
+    // the board runs out, and the hands are read exactly as they would have been.
+    test("all-in with the betting finished is still asked about", () => {
+        const state = atShowdown();
+        state.seats.forEach(player => { player.stack = 0; });
+        assert.ok(!Betting.canStillBet(state));
+        assert.strictEqual(queue(state).length, 4);
+    });
+});
+
+describe("only the hands it doesn't already have", () => {
+    test("a hand already entered is not asked for again", () => {
+        const state = atShowdown();
+        state.seats[1].cards = ["AS", "AH"];
+        assert.ok(!queue(state).includes(1));
+    });
+
+    test("half a hand entered is still asked for", () => {
+        const state = atShowdown();
+        state.seats[1].cards = ["AS", ""];
+        assert.ok(queue(state).includes(1));
+    });
+
+    test("every hand entered means the sheet never opens", () => {
+        const state = atShowdown();
+        const hands = [["AS", "AH"], ["KS", "KH"], ["QS", "QH"], ["9H", "9D"]];
+        state.seats.forEach((player, i) => { player.cards = hands[i]; });
+        assert.deepStrictEqual(queue(state), []);
+    });
+});
+
+describe("in the order the cards come over", () => {
+    // The bar already says "Mike shows first — last to bet or raise" out loud. The
+    // sheet asking about somebody else first would be the tool contradicting itself
+    // in the same breath.
+    test("it starts with whoever the bar says shows first", () => {
+        const state = atShowdown();
+        state.streetAggressorIndex = 2;
+        assert.strictEqual(Betting.showdownOrder(state).index, 2);
+        assert.strictEqual(queue(state)[0], 2);
+    });
+
+    test("and then goes round the table from there", () => {
+        const state = atShowdown();
+        state.streetAggressorIndex = 2;
+        assert.deepStrictEqual(queue(state), [2, 3, 0, 1]);
+    });
+
+    test("nobody checked the river, so it starts left of the button", () => {
+        const state = atShowdown();
+        state.streetAggressorIndex = null;
+        state.handAggressorIndex = null;
+        const first = Betting.showdownOrder(state);
+        assert.strictEqual(first.reason, "leftOfButton");
+        assert.strictEqual(queue(state)[0], first.index);
+    });
+
+    test("a player already entered drops out of the order without moving the rest", () => {
+        const state = atShowdown();
+        state.streetAggressorIndex = 2;
+        state.seats[3].cards = ["KS", "KH"];
+        assert.deepStrictEqual(queue(state), [2, 0, 1]);
+    });
+
+    test("everyone still in is asked exactly once", () => {
+        const state = atShowdown({ seats: 9 });
+        const asked = queue(state);
+        assert.strictEqual(new Set(asked).size, asked.length);
+        assert.strictEqual(asked.length, Betting.liveSeats(state).length);
+    });
+});

tests/holdem/sidebarPanels.test.js

@@ -0,0 +1,124 @@
+// What the sidebar is a list of.
+//
+// The panels were Table Setup, Session, Chip Legend, Keyboard and Table Notes, and
+// "Session" was a container word rather than a name. It held the standings, a waiting
+// list, the hand log and the save/load/reset buttons — a topic, a task, a log and three
+// utilities under one label, which is the "don't mix apples and oranges" failure: a
+// navigation layer with more than one logic in it. Measured at 1206px and 103 visible
+// elements, against 555 and 29 for the next biggest, and "The table itself" sat 1052px
+// down inside it, so reaching Reset table meant opening a panel called Session and
+// scrolling past the money and the log.
+//
+// This is a markup test because that is where the fault lived. Nothing was broken —
+// every control worked and every id resolved — so nothing failed. What was wrong was
+// which panel a thing was in and what that panel was called.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
+
+const PAGE = fs.readFileSync(
+    path.join(__dirname, "..", "..", "JoshHeaps.Net", "Pages", "Casino", "TexasHoldem.cshtml"), "utf8");
+
+// A sidebar panel never contains another one — Table Setup's sub-panels carry a
+// different class — so splitting on the opening tag is enough to say which panel any
+// piece of markup is in, without parsing the document.
+const panels = () => PAGE
+    .split(/<details class="sidebarPanel"/)
+    .slice(1)
+    .map(chunk => {
+        const name = chunk.match(/<summary>\s*(?:<h2>)?([^<]+)/);
+        return { name: name ? name[1].trim() : "(no summary)", markup: chunk };
+    });
+
+const panelHolding = id => {
+    const found = panels().filter(p => p.markup.includes(`id="${id}"`));
+    assert.equal(found.length, 1, `${id} is in ${found.length} panels, expected exactly 1`);
+    return found[0].name;
+};
+
+// ---------------------------------------------------------------------------
+
+describe("the sidebar's names", () => {
+    test("say what is inside them", () => {
+        // Every one of these is a thing a dealer goes looking for. None of them is a
+        // word that could hold anything — which is the test "Session" fails.
+        assert.deepEqual(panels().map(p => p.name), [
+            "Table Setup",
+            "Standings",
+            "Waiting list",
+            "Hands",
+            "Chip Legend",
+            "Keyboard",
+            "Table Notes",
+            "Save &amp; reset",
+        ]);
+    });
+
+    test("and each one is a heading, not only a button", () => {
+        // A <summary> is announced as a button. The sidebar's names are the whole of its
+        // navigation, so without a heading inside, none of them is reachable by anyone
+        // moving through the page by heading — and splitting Session removed the four
+        // subheads that used to be the only headings down here.
+        panels().forEach(p => assert.match(p.markup, /<summary><h2>/,
+            `the ${p.name} panel's name is not a heading`));
+    });
+});
+
+describe("where things live", () => {
+    test("the money is together, and the warning about losing it is with it", () => {
+        assert.equal(panelHolding("standingsList"), "Standings");
+        assert.equal(panelHolding("settleUp"), "Standings");
+        assert.equal(panelHolding("bankReconcile"), "Standings");
+        // renderStorageWarning() says this "sits at the top of the panel a dealer opens
+        // to check the money". That panel is now called Standings.
+        assert.equal(panelHolding("storageWarning"), "Standings");
+    });
+
+    test("the queue for a seat is its own panel", () => {
+        assert.equal(panelHolding("waitingList"), "Waiting list");
+        assert.equal(panelHolding("waitingListForm"), "Waiting list");
+    });
+
+    test("the log and the two ways out of it are together", () => {
+        assert.equal(panelHolding("handHistoryList"), "Hands");
+        assert.equal(panelHolding("handHistoryFilter"), "Hands");
+        assert.equal(panelHolding("exportHistoryBtn"), "Hands");
+        assert.equal(panelHolding("clearHistoryBtn"), "Hands");
+    });
+
+    test("and the file is last, with the danger on the label", () => {
+        assert.equal(panelHolding("saveTableBtn"), "Save &amp; reset");
+        assert.equal(panelHolding("loadTableBtn"), "Save &amp; reset");
+        assert.equal(panelHolding("resetTableBtn"), "Save &amp; reset");
+        assert.equal(panels()[panels().length - 1].name, "Save &amp; reset",
+            "the panel that ends the night belongs at the end, away from the working ones");
+    });
+});
+
+describe("no panel goes back to being a grab-bag", () => {
+    // Not a size limit — Table Setup is legitimately long and Chip Legend legitimately
+    // repeats a row per chip. What this counts is *subjects*: a panel that needs its own
+    // headings to say what its parts are is a panel holding more than one thing, which
+    // is what Session was and how it got that way.
+    test("at most one subject needs a heading inside a panel", () => {
+        panels().forEach(p => {
+            const subheads = [...p.markup.matchAll(/<h3 class="panelSubhead">([^<]+)</g)]
+                .map(m => m[1].trim());
+            assert.ok(subheads.length <= 1,
+                `${p.name} has ${subheads.length} sections inside it (${subheads.join(", ")}) — ` +
+                `if a panel needs headings to list its parts, its name is not doing the work`);
+        });
+    });
+
+    test("and the ones that remain are a detail of their panel, not a second subject", () => {
+        // Settle up is the standings once the night ends; Stacks in chips is the chip
+        // legend counted out. Both are the same subject at a different moment, which is
+        // the case a subhead is for.
+        const kept = panels().flatMap(p =>
+            [...p.markup.matchAll(/<h3 class="panelSubhead">([^<]+)</g)]
+                .map(m => `${p.name}: ${m[1].trim()}`));
+        assert.deepEqual(kept, ["Standings: Settle up", "Chip Legend: Stacks in chips"]);
+    });
+});

tests/holdem/staleToast.test.js

@@ -0,0 +1,106 @@
+// The toast that outlived the thing it was talking about.
+//
+// Toasts are news about the last action, and they carry an Undo. Take another action
+// and both of those go wrong at once: the sentence describes a step that is now two
+// steps back, and the Undo behind it restores a snapshot from before everything since.
+// "Next hand — button on seat 2. [Undo]" left up while a hand is dealt and three
+// players call is an offer to move the button, wired to a button that deletes the hand.
+//
+// It is also simply in the way. The toast is a fixed strip near the bottom of the
+// screen; on a 360x640 phone there is nowhere for it to sit that is clear of both the
+// felt and the action bar, so a stale one covers seats and controls for eight seconds.
+//
+// So the bar drops it as it takes the next action. These tests hold that funnel shut:
+// every action a dealer can take from the bar goes through `commit`, and `commit`
+// clears the toast before it does anything else.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
+const { ActionBar, Betting, makeTable } = require("./load");
+
+const SRC = path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "js", "casino", "holdem");
+const barSource = fs.readFileSync(path.join(SRC, "actionBar.js"), "utf8");
+
+// A bar sat at a real table, with the toast replaced by something that keeps a log
+// and the re-render stubbed out — none of these rules need the DOM back.
+function onTable() {
+    const state = makeTable({ seatCount: 6, stack: 200, smallBlind: 1, bigBlind: 2, dealerSeatIndex: 0 });
+    const log = [];
+    globalThis.Toast = {
+        onScreen: null,
+        show(message) { this.onScreen = message; log.push(`show ${message}`); },
+        dismiss() { this.onScreen = null; log.push("dismiss"); },
+    };
+    ActionBar.state = state;
+    ActionBar.render = () => {};
+    ActionBar.hooks = {
+        beginAction: label => log.push(`begin ${label}`),
+        save: () => log.push("save"),
+        rerender: () => log.push("rerender"),
+    };
+    return { bar: ActionBar, state, log };
+}
+
+test.afterEach(() => { delete globalThis.Toast; });
+
+describe("a toast does not outlive its own news", () => {
+    test("the next action from the bar clears it", () => {
+        const { bar, state, log } = onTable();
+        Toast.show("Next hand — button on seat 2.");
+
+        bar.commit("dealing the hand", () => Betting.beginHand(state));
+
+        assert.equal(Toast.onScreen, null, "the hand is dealt; the sentence about seating the table is not news any more");
+        assert.ok(log.indexOf("dismiss") < log.indexOf("begin dealing the hand"),
+            `the toast goes before the action is recorded, so nothing shown during the action is swept up with it: ${log.join(", ")}`);
+    });
+
+    test("a toast raised by the action itself survives", () => {
+        const { bar, log } = onTable();
+        bar.commit("something that talks back", () => Toast.show("Bob is all in."));
+
+        assert.equal(Toast.onScreen, "Bob is all in.",
+            "commit clears what was there when it started, not what its own work puts up");
+        assert.deepEqual(log, ["dismiss", "begin something that talks back", "show Bob is all in.", "save", "rerender"]);
+    });
+
+    test("with no toast on screen it is still just one dismiss", () => {
+        const { bar, log } = onTable();
+        bar.commit("a fold", () => {});
+        assert.equal(log.filter(l => l === "dismiss").length, 1);
+    });
+
+    test("a page with no Toast at all does not throw", () => {
+        const { bar, state } = onTable();
+        delete globalThis.Toast;
+        assert.doesNotThrow(() => bar.commit("dealing the hand", () => Betting.beginHand(state)));
+    });
+});
+
+describe("every bar action really does go through that funnel", () => {
+    // The dismiss is worth nothing if some button reaches past `commit` to mutate the
+    // table itself. Actions are written as `this.commit(...)`; a `Betting.` call made
+    // straight from a click handler would be one that skips the clean-up — and the
+    // undo history with it, which is the older reason this funnel exists.
+    test("no click handler calls the betting engine directly", () => {
+        const strays = barSource
+            .split("\n")
+            .map((line, i) => [i + 1, line])
+            .filter(([, line]) => /=>\s*Betting\.(fold|check|call|allIn|raiseTo|beginHand|closeStreet)\(/.test(line))
+            .filter(([, line]) => !/this\.commit\(/.test(line))
+            .map(([n, line]) => `actionBar.js:${n}: ${line.trim()}`);
+
+        assert.deepEqual(strays, [], "these change the table without going through commit");
+    });
+
+    test("commit is what clears the toast, not each button", () => {
+        const dismissals = barSource.split("\n").filter(l => /Toast\.dismiss\(\)/.test(l)).length;
+        // Two: this one, and the raise pad — which opens without committing anything,
+        // and needs the strip clear because the pad makes the bar tall enough to push
+        // a toast up over the seats.
+        assert.equal(dismissals, 2,
+            "a third dismissal means a button is doing by hand what commit already does");
+    });
+});

tests/holdem/startingStackMoney.test.js

@@ -0,0 +1,166 @@
+// The chips the felt plays with are the chips the box is checked against.
+//
+// "Starting stack" is offered in the setup panel as the ordinary way to open a table —
+// "seats without their own stack start here" — and everything a dealer looks at reads
+// it: the puck, the action bar, what a player is allowed to bet. The money side did
+// not. It read `seat.stack` directly, which is null for exactly those seats, so a
+// three-handed table playing for $600 reported no chips in play, a balanced bank and a
+// standings list with nobody on it.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { Money, HoldemState, Betting } = require("./load");
+
+const openedWithStartingStack = (stack = 200, names = ["Ann", "Ben", "Cal"]) => {
+    const state = HoldemState.createDefault();
+    HoldemState.resizeSeats(state, 6);
+    state.defaultStack = stack;
+    names.forEach((name, i) => {
+        state.seats[i].name = name;
+        state.seats[i].inHand = true;
+    });
+    return state;
+};
+
+describe("what the table is playing for", () => {
+    test("is what the bank counts", () => {
+        const state = openedWithStartingStack();
+        // What the felt says each of them has.
+        assert.deepEqual(state.seats.slice(0, 3).map(p => Betting.stackOf(state, p)), [200, 200, 200]);
+        assert.equal(HoldemState.bankReconciliation(state).chipsInPlay, 600);
+    });
+
+    test("and the box being empty is a problem it now reports", () => {
+        const bank = HoldemState.bankReconciliation(openedWithStartingStack());
+        assert.equal(bank.cashIn, 0);
+        assert.equal(bank.difference, 600);
+        assert.equal(bank.balanced, false, "six hundred dollars of chips nobody paid for");
+    });
+
+    test("empty chairs are not people holding two hundred dollars", () => {
+        // The starting stack stands in for a seat that hasn't been given one, and every
+        // empty chair is such a seat. Counting them would invent $600 of chips at an
+        // empty table.
+        const state = openedWithStartingStack();
+        assert.equal(HoldemState.bankReconciliation(state).chipsInPlay, 600, "three players, not six chairs");
+
+        const empty = HoldemState.createDefault();
+        empty.defaultStack = 200;
+        assert.equal(HoldemState.bankReconciliation(empty).chipsInPlay, 0);
+        assert.equal(HoldemState.bankReconciliation(empty).balanced, true);
+    });
+
+    test("once the cash is written down it balances", () => {
+        const state = openedWithStartingStack();
+        state.seats.slice(0, 3).forEach(p => { p.buyIns = 200; });
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+    });
+
+    test("a table where everyone has their own stack is unchanged", () => {
+        const state = HoldemState.createDefault();
+        HoldemState.resizeSeats(state, 4);
+        ["Ann", "Ben"].forEach((name, i) => {
+            state.seats[i].name = name;
+            state.seats[i].stack = 150;
+            state.seats[i].buyIns = 150;
+        });
+        const bank = HoldemState.bankReconciliation(state);
+        assert.equal(bank.chipsInPlay, 300);
+        assert.equal(bank.balanced, true);
+    });
+});
+
+describe("who is on the settle-up list", () => {
+    test("everyone holding chips, including the ones holding the table's own stack", () => {
+        const rows = HoldemState.sessionStandings(openedWithStartingStack());
+        assert.deepEqual(rows.map(r => r.name), ["Ann", "Ben", "Cal"]);
+        assert.deepEqual(rows.map(r => r.chipsInFront), [200, 200, 200]);
+    });
+
+    test("with nothing bought in yet, which is the thing to notice", () => {
+        const rows = HoldemState.sessionStandings(openedWithStartingStack());
+        assert.deepEqual(rows.map(r => r.boughtIn), [0, 0, 0]);
+        assert.deepEqual(rows.map(r => r.cashPosition), [200, 200, 200]);
+    });
+});
+
+describe("naming the seats the cash is missing for", () => {
+    test("says who, and which kind of missing it is", () => {
+        const state = openedWithStartingStack();
+        state.seats[2].stack = 320;      // Cal typed his own: an unrecorded rebuy
+
+        const owing = HoldemState.seatsOwingCash(state);
+        assert.deepEqual(owing.map(row => row.name), ["Ann", "Ben", "Cal"]);
+        assert.deepEqual(owing.map(row => row.fromStartingStack), [true, true, false]);
+        assert.deepEqual(owing.map(row => row.chips), [200, 200, 320]);
+    });
+
+    test("a seat whose buy-in is written down isn't on the list", () => {
+        const state = openedWithStartingStack();
+        state.seats[0].buyIns = 200;
+        assert.deepEqual(HoldemState.seatsOwingCash(state).map(row => row.name), ["Ben", "Cal"]);
+    });
+
+    test("and a table where nothing is owed has nobody on it", () => {
+        const state = openedWithStartingStack();
+        state.seats.slice(0, 3).forEach(p => { p.buyIns = 200; });
+        assert.deepEqual(HoldemState.seatsOwingCash(state), []);
+    });
+});
+
+describe("writing the starting stacks down", () => {
+    test("records exactly what those seats are holding", () => {
+        const state = openedWithStartingStack();
+        const done = HoldemState.recordStartingBuyIns(state);
+        assert.equal(done.seats, 3);
+        assert.equal(done.total, 600);
+        assert.deepEqual(state.seats.slice(0, 3).map(p => p.buyIns), [200, 200, 200]);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+    });
+
+    test("and leaves somebody else's forgotten rebuy alone", () => {
+        // Only the dealer knows what that was. Guessing would be the tool inventing
+        // money, which is the fault this whole round is about.
+        const state = openedWithStartingStack();
+        state.seats[2].stack = 320;
+        HoldemState.recordStartingBuyIns(state);
+
+        assert.deepEqual(state.seats.slice(0, 3).map(p => p.buyIns), [200, 200, 0]);
+        const bank = HoldemState.bankReconciliation(state);
+        assert.equal(bank.balanced, false);
+        assert.equal(bank.difference, 320, "still exactly Cal's chips, and still reported");
+    });
+
+    test("does nothing on a table that doesn't need it", () => {
+        const state = openedWithStartingStack();
+        state.seats.slice(0, 3).forEach(p => { p.buyIns = 200; });
+        const done = HoldemState.recordStartingBuyIns(state);
+        assert.equal(done.seats, 0);
+        assert.equal(done.total, 0);
+        assert.deepEqual(state.seats.slice(0, 3).map(p => p.buyIns), [200, 200, 200]);
+    });
+});
+
+describe("through a hand", () => {
+    test("the money adds up from the deal to the payout", () => {
+        const state = openedWithStartingStack(200, ["Ann", "Ben", "Cal", "Dee"]);
+        HoldemState.recordStartingBuyIns(state);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+
+        Betting.beginHand(state);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true, "blinds are still on the table");
+
+        [3, 0, 1].forEach(() => { if (state.actingSeatIndex !== null) Betting.call(state, state.actingSeatIndex); });
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+
+        const pot = Betting.potSoFar(state);
+        Betting.sweepToHandTotals(state);
+        Betting.creditWinnings(state, [{ id: state.seats[0].id, label: "Ann", amount: pot }]);
+        HoldemState.startNextHand(state);
+
+        const bank = HoldemState.bankReconciliation(state);
+        assert.equal(bank.balanced, true);
+        assert.equal(bank.chipsInPlay, 800, "four buy-ins of two hundred, wherever they have moved to");
+        assert.ok(state.seats[0].stack > 200, "and the winner is holding more than they sat down with");
+    });
+});

tests/holdem/theHeader.test.js

@@ -0,0 +1,175 @@
+// What stands between the top of a phone and the felt.
+//
+// The header was 120px of a 390x844 phone — 16% of the window, spent before the table
+// started — and only 46 of that was a control. The other 74 were a 22px page title with
+// a gold rule under it, a back link, and a gold "Hand #1" pill: three things read once,
+// above a screen whose subject is the green table underneath.
+//
+// A phone held sideways had already solved this. The landscape block clips the title and
+// puts everything on one row, because at 390px tall there was no other option. Upright
+// never got the same answer, and upright is how this tool is held: measured after, the
+// header is 44px and the felt went from 496px to 570.
+//
+// Two claims are checked here. The stylesheet's, as text — the same way the seat sheet's
+// and the reduced-motion rules are — because "which row is this on" is a layout decision
+// that lives in the file. And the action bar's, by running it: the hand number had to go
+// somewhere, and where it went is a rendering question.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
+const { ActionBar, makeTable } = require("./load");
+
+const PAGE = fs.readFileSync(
+    path.join(__dirname, "..", "..", "JoshHeaps.Net", "Pages", "Casino", "TexasHoldem.cshtml"), "utf8");
+const CSS = fs.readFileSync(
+    path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "css", "casino", "holdem.css"), "utf8");
+
+// Every @media block written at exactly this condition, concatenated.
+//
+// All of them, not the first one — `@media (max-width: 700px)` is opened twice in this
+// file, the second time to hold the phone layout proper, and a helper that stopped at
+// the first found a block with none of these rules in it and reported them missing.
+const mediaBlock = condition => {
+    const found = [];
+    const needle = "@media ";
+    for (let at = CSS.indexOf(needle); at >= 0; at = CSS.indexOf(needle, at + 1)) {
+        const open = CSS.indexOf("{", at);
+        if (CSS.slice(at + needle.length, open).trim() !== condition) continue;
+        let depth = 0;
+        for (let i = open; i < CSS.length; i++) {
+            if (CSS[i] === "{") depth++;
+            else if (CSS[i] === "}" && --depth === 0) { found.push(CSS.slice(open + 1, i)); break; }
+        }
+    }
+    assert.ok(found.length > 0, `no @media block written as "${condition}"`);
+    return found.join("\n");
+};
+
+const ruleIn = (block, selector) => {
+    const re = new RegExp(`(^|[},])\\s*${selector.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")}\\s*\\{([^}]*)\\}`, "m");
+    const found = block.match(re);
+    return found ? found[2] : null;
+};
+
+const PHONE = () => mediaBlock("(max-width: 700px)");
+// The header's sideways rules are in the plain landscape query, not the one that also
+// caps the width — that later block is the seat sheet's and the action rail's. Both
+// exist, and picking the wrong one finds a block with no header in it at all.
+const LANDSCAPE = () => mediaBlock("(orientation: landscape) and (max-height: 560px)");
+
+// ---------------------------------------------------------------------------
+
+describe("the header is one row on a phone", () => {
+    test("upright gets the shape a phone on its side already had", () => {
+        // These four together are the whole change: don't wrap, drop the word beside the
+        // arrow, clip the title, and let the buttons size themselves in what is left.
+        const phone = PHONE();
+        assert.match(ruleIn(phone, "#holdemHeader") || "", /flex-wrap:\s*nowrap/,
+            "a wrapping header is a two-row header");
+        assert.match(ruleIn(phone, "#holdemHeaderLeft") || "", /display:\s*contents/,
+            "the arrow has to be a flex item of the header, not a block inside a block");
+        assert.ok(ruleIn(phone, ".backLinkWord"), "the word beside the arrow is not dropped");
+        assert.ok(ruleIn(phone, "#holdemHeader h1"), "the title is not addressed on a phone");
+    });
+
+    test("both narrow layouts clip the title rather than removing it", () => {
+        // `display: none` would take the page's only <h1> off the accessibility tree, and
+        // a page whose heading disappears below 700px is a page with no heading on the
+        // device it is mostly read on.
+        [["upright", PHONE()], ["sideways", LANDSCAPE()]].forEach(([which, block]) => {
+            const rule = ruleIn(block, "#holdemHeader h1");
+            assert.ok(rule, `${which} does not address the title`);
+            assert.doesNotMatch(rule, /display:\s*none/,
+                `${which} removes the page's heading instead of hiding it`);
+            assert.match(rule, /clip-path:\s*inset\(50%\)/,
+                `${which} should clip the heading the way .visuallyHidden does`);
+        });
+    });
+
+    test("the actions row stops claiming a row of its own", () => {
+        // `width: 100%` is what made it a second row: a flex child at full width cannot
+        // share a line with anything, whatever the wrap setting says.
+        const rule = ruleIn(PHONE(), "#holdemHeaderActions") || "";
+        assert.doesNotMatch(rule, /width:\s*100%/);
+        assert.match(rule, /flex:\s*1/, "it should take the width the title gave up");
+    });
+
+    test("and the buttons grow into that width without ever shrinking below their labels", () => {
+        // `flex: 1 1 0` would divide the row into equal thirds and squeeze "Next Hand ⟳"
+        // — 105px of text — into 99. These are `white-space: nowrap`, so what gives is
+        // the text.
+        const rule = ruleIn(PHONE(), "#holdemHeaderActions .holdemBtn") || "";
+        assert.match(rule, /flex:\s*1\s+1\s+auto/, "an auto basis makes the label the floor");
+        assert.match(rule, /white-space:\s*nowrap/);
+        assert.match(rule, /min-height:\s*46px/, "across is the only direction that tightens");
+    });
+
+    test("the arrow keeps a thumb-sized box once it loses its word", () => {
+        // The word used to carry the width, and the padding only had to make up the
+        // height. With the word gone the arrow is the whole target, and the first
+        // attempt at 32px was measured by the layout sweep at 31x43 on every touch
+        // viewport it runs — 56 scenarios, one control.
+        [["upright", PHONE()], ["sideways", LANDSCAPE()]].forEach(([which, block]) => {
+            const rule = ruleIn(block, ".holdemBackLink") || "";
+            assert.match(rule, /min-width:\s*44px/, `${which}'s back arrow is under the touch floor`);
+            // The negative margins that gave the hit area back to a two-row header would
+            // now pull the arrow out of a row it is the first item of.
+            assert.match(rule, /margin:\s*0/);
+        });
+    });
+
+    test("and it still says where it goes when the word is gone", () => {
+        // An "←" on its own is announced as "left arrow" and names nothing. The label
+        // contains the visible text on the sizes that still show it, which is what
+        // WCAG 2.5.3 asks of a name that says more than the label does.
+        const link = PAGE.match(/<a href="\/casino"[^>]*>/);
+        assert.ok(link, "the back link is gone");
+        const label = link[0].match(/aria-label="([^"]+)"/);
+        assert.ok(label, "the back link has no accessible name for when the word is hidden");
+        assert.match(label[1], /Casino/,
+            "the visible word has to appear in the spoken name");
+    });
+});
+
+describe("the hand number found somewhere to live", () => {
+    test("it is not a pill beside the page title any more", () => {
+        assert.ok(!PAGE.includes("handCounterBadge"),
+            "a counter read after the fact does not earn a line of a phone's header");
+    });
+
+    test("it is in the row that already says what hand you are in", () => {
+        // The street, the pot and the player count are the other three facts about the
+        // current hand, and they are drawn together. This one costs nothing there: the
+        // row was on the screen already.
+        const source = fs.readFileSync(
+            path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "js", "casino", "holdem", "actionBar.js"),
+            "utf8");
+        // Sliced from the top of renderStatus to the first mention of the street, so
+        // finding the hand chip inside that slice is the ordering claim as well as the
+        // presence one: it is appended before the street or it is not in here.
+        const status = source.slice(source.indexOf("renderStatus()"), source.indexOf("actionStreet"));
+        assert.match(status, /actionHand/,
+            "the status row does not say which hand this is, or says it after the street");
+    });
+
+    test("a table that has never dealt says #1, not #0 and not #undefined", () => {
+        const state = makeTable({ seatCount: 4 });
+        delete state.handNumber;
+        assert.equal(ActionBar.handLabel(state), "#1");
+        assert.equal(ActionBar.handLabel({ handNumber: 0 }), "#1");
+        assert.equal(ActionBar.handLabel({ handNumber: 12 }), "#12");
+        assert.equal(ActionBar.handLabel(null), "#1");
+    });
+
+    test("it is drawn quieter than the street beside it", () => {
+        // The street is read every deal; this is read when somebody asks about a hand
+        // that is already over. Same row, different job, and the colour says so.
+        const rule = CSS.match(/\.actionHand\s*\{([^}]*)\}/);
+        assert.ok(rule, ".actionHand has no rule");
+        assert.match(rule[1], /color:\s*var\(--text-dim\)/);
+        // A number that ticks over while the dealer is looking at it.
+        assert.match(rule[1], /font-variant-numeric:\s*tabular-nums/);
+    });
+});

tests/holdem/theRail.test.js

@@ -0,0 +1,500 @@
+// A phone held sideways, and the three pieces of arithmetic that make the table fit on
+// one.
+//
+// The layout audit is what proved this was broken and what proves it is fixed — it
+// measures the drawn page, which is the only place a layout is really true. What is
+// here is the part underneath that can be wrong on its own: which shape the bar is in,
+// how much of the bottom that leaves spoken for, how a name is shortened when it will
+// not fit, and how the ring is pulled back in when a puck lands past the rail.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const fs = require("fs");
+const path = require("path");
+const { ActionBar, Render } = require("./load");
+
+const CSS = fs.readFileSync(
+    path.join(__dirname, "..", "..", "JoshHeaps.Net", "wwwroot", "css", "casino", "holdem.css"), "utf8");
+
+// ---------------------------------------------------------------------------
+
+describe("which shape the bar is in", () => {
+    // The layout is chosen by a media query — orientation, height and width together.
+    // The one thing that must not happen is a second copy of that query in JavaScript,
+    // because the first thing anybody changes is the breakpoint, in one of the two
+    // places. So the stylesheet declares which layout it picked and actionBar.js reads
+    // the answer back.
+    const withComputed = (value, run) => {
+        const host = { id: "actionBar" };
+        global.getComputedStyle = el => ({
+            getPropertyValue: prop => (el === host && prop === "--actionBarLayout" ? value : ""),
+        });
+        try { return run(host); } finally { delete global.getComputedStyle; }
+    };
+
+    test("the stylesheet says, and this reads", () => {
+        assert.equal(withComputed(" rail ", host => ActionBar.isRail(host)), true);
+        assert.equal(withComputed(" bar ", host => ActionBar.isRail(host)), false);
+    });
+
+    test("anything it does not recognise is the bar it has always been", () => {
+        assert.equal(withComputed("", host => ActionBar.isRail(host)), false);
+        assert.equal(withComputed("sidebar", host => ActionBar.isRail(host)), false);
+    });
+
+    test("and with no browser at all, likewise", () => {
+        assert.equal(ActionBar.isRail(null), false);
+        assert.equal(ActionBar.isRail({ id: "actionBar" }), false,
+            "no getComputedStyle to ask — this runs in the unit suite too");
+    });
+
+    test("the stylesheet declares both halves of it", () => {
+        // If either of these goes, isRail() quietly answers "bar" forever and the felt
+        // is measured against a bar that is not underneath it.
+        assert.match(CSS, /#actionBar\s*\{[^}]*--actionBarLayout:\s*bar/,
+            "the default, on the base rule");
+        assert.match(CSS, /--actionBarLayout:\s*rail/,
+            "and the rail, inside the landscape query");
+    });
+
+    test("the rail is scoped to a phone, not to any short window", () => {
+        // Above 900px the sidebar is already a right-hand column and a rail would land
+        // on top of it.
+        const query = CSS.match(/@media \(orientation: landscape\)[^{]*\{[\s\S]{0,400}?--actionBarLayout: rail/);
+        assert.ok(query, "the rail lives in a landscape media query");
+        assert.match(query[0], /max-width:\s*900px/);
+        assert.match(query[0], /max-height:\s*560px/);
+    });
+});
+
+// ---------------------------------------------------------------------------
+
+describe("the bar lines up with the table", () => {
+    // On a desktop the bar was centred on the window and the table on its own column,
+    // and the sidebar takes 320px out of the right of that — so the two things a dealer
+    // is looking at were 172px apart, at 960px wide and at 1600px and everywhere in
+    // between, because the offset is half the sidebar and the sidebar is a constant.
+    //
+    // The rule that fixes it is four numbers that have to keep agreeing with four other
+    // numbers, none of them anywhere near each other in the file. That is what this
+    // block is for: the arithmetic is checked on the running page by measurement (bar
+    // centre against table-column centre, which came out 0px off at every width), and
+    // the numbers it depends on are checked here so they cannot drift apart afterwards.
+    const rule = CSS.match(/@media \(min-width: 901px\) \{\s*#actionBar \{([^}]*)\}/);
+
+    test("there is a rule, and it is scoped above the one-column breakpoint", () => {
+        // Below 901px the sidebar is not a column at all — it is stacked under the table
+        // — so there is nothing to lean away from and the bar is centred as it was.
+        assert.ok(rule, "no min-width: 901px rule for #actionBar");
+        assert.match(CSS, /@media \(max-width: 900px\)[\s\S]{0,200}#holdemLayout \{\s*grid-template-columns: 1fr;/,
+            "the one-column layout should start exactly where this rule stops");
+    });
+
+    test("it leans away from the sidebar by the sidebar's own width", () => {
+        assert.match(rule[1], /left:\s*var\(--sp-6\)/);
+        assert.match(rule[1], /right:\s*calc\(var\(--sidebarW\)\s*\+\s*var\(--sp-5\)\s*\+\s*var\(--sp-6\)\)/);
+    });
+
+    test("and the sidebar's width is one number, not two", () => {
+        // The grid draws the column and the bar leans away from it. Written out twice,
+        // the day somebody widens the sidebar is the day the bar goes crooked and no
+        // test says so.
+        assert.match(CSS, /--sidebarW:\s*\d+px/, "the token should be declared");
+        assert.match(CSS, /grid-template-columns:\s*1fr var\(--sidebarW\)/,
+            "the grid should draw the column from the token");
+    });
+
+    test("no 100vw anywhere in it", () => {
+        // The bar's own centring comment warns about this: on a page with a scrollbar
+        // 100vw is wider than the viewport, and the overflow drags the table sideways.
+        // The offsets are exact without it — see the derivation in the stylesheet.
+        assert.equal(/100vw/.test(rule[1]), false, rule[1]);
+    });
+});
+
+// ---------------------------------------------------------------------------
+
+describe("the button seat's name", () => {
+    // The dealer button's chip sits in the puck's top-right corner. Keeping the name out
+    // from under it with `padding-right` takes the chip's width off *every* line of the
+    // name, and the chip is on one of them: measured at 1280x900, the name box is 78px,
+    // "Christopher" is 66 and fits, and on the seat holding the button it was cut to 56
+    // and broke as "Christop / her". The button moves every hand, so that is a player
+    // whose name reads properly for four hands and comes apart on the fifth.
+    const roomy = CSS.match(/#seatsLayer:not\(\.seatsTight\) \.seat\.seatHasButton \.seatPuckName \{([^}]*)\}/);
+    const float = CSS.match(/#seatsLayer:not\(\.seatsTight\) \.seat\.seatHasButton \.seatPuckName::before \{([^}]*)\}/);
+    const base = CSS.match(/\n\.seat\.seatHasButton \.seatPuckName \{([^}]*)\}/);
+
+    test("a ring with room for two lines indents only the line beside the chip", () => {
+        assert.ok(roomy && float, "the roomy regime should use a float");
+        assert.match(float[1], /float:\s*right/);
+        assert.match(roomy[1], /padding-right:\s*0/);
+    });
+
+    test("the float is exactly one line tall", () => {
+        // Tall enough to cover the chip's reach into the name, and no taller: a float
+        // that spills into the second line indents that one too, which puts the whole
+        // problem back.
+        assert.match(float[1], /height:\s*1\.2em/);
+    });
+
+    test("break-word stands down where the float is doing the work", () => {
+        // It is what stops the float working — it breaks a word to fit the short line
+        // rather than letting it move past the float to the long one.
+        assert.match(roomy[1], /overflow-wrap:\s*normal/);
+    });
+
+    test("a crowded ring keeps the padding, because it has only one line", () => {
+        // `.seatsTight .seatPuckName` is `line-clamp: 1` on purpose, and one line has
+        // nowhere to move to — the only way to keep it off the chip is to shorten it.
+        // Trying the float on both cost a whole sweep to find out: the name dropped onto
+        // a second line that the chip's lower half was still sitting on, and the audit
+        // called it at every viewport in the list.
+        assert.ok(base, "the base rule should still reserve the chip's width");
+        assert.match(base[1], /padding-right:\s*22px/);
+        assert.match(CSS, /\.seatsTight \.seatPuckName \{[^}]*line-clamp:\s*1/);
+    });
+
+    test("the float is as wide as the chip it stands in for", () => {
+        const chip = CSS.match(/\n\.dealerChip \{[^}]*?(?<![\w-])width:\s*(\d+)px/);
+        const inset = CSS.match(/\n\.dealerChip \{[^}]*?(?<![\w-])right:\s*(\d+)px/);
+        const floatW = float[1].match(/width:\s*(\d+)px/);
+        assert.ok(chip && inset && floatW);
+        assert.equal(Number(floatW[1]), Number(chip[1]) + Number(inset[1]),
+            "the float should cover the chip and the gap it is inset by");
+    });
+});
+
+// ---------------------------------------------------------------------------
+
+describe("how much of the bottom is spoken for", () => {
+    // feltRoomFor asks one question — what is under the felt — and gets two different
+    // answers depending on the layout. Under the bar it is the bar. Under the rail it is
+    // the table hint and the two links, because the bar is off to the side.
+    const fakeSection = (wrapBottom, sectionBottom) => {
+        const wrap = {
+            getBoundingClientRect: () => ({ bottom: wrapBottom }),
+            parentElement: { getBoundingClientRect: () => ({ bottom: sectionBottom }) },
+        };
+        global.document = { getElementById: id => (id === "pokerTableWrap" ? wrap : null) };
+    };
+
+    test.afterEach(() => { delete global.document; });
+
+    test("it is the gap under the felt, links and all", () => {
+        fakeSection(300, 342);
+        assert.equal(ActionBar.roomBelowFelt(), 42);
+    });
+
+    test("a difference, not a height — so it does not chase the felt it is sizing", () => {
+        // The wrap's own height comes from --feltRoomPx, which is what this feeds. Read
+        // as "how tall is everything under the felt" off the section's height it would
+        // move every time the felt did, and settle nowhere.
+        fakeSection(300, 342);
+        const first = ActionBar.roomBelowFelt();
+        fakeSection(500, 542);   // the felt grew by 200; what is under it did not
+        assert.equal(ActionBar.roomBelowFelt(), first);
+    });
+
+    test("nothing under the felt is nothing to reserve", () => {
+        fakeSection(300, 300);
+        assert.equal(ActionBar.roomBelowFelt(), 0);
+    });
+
+    test("and a section that measures shorter than its own child is not negative room", () => {
+        fakeSection(300, 288);
+        assert.equal(ActionBar.roomBelowFelt(), 0);
+    });
+
+    test("with no table on the page it asks for nothing", () => {
+        global.document = { getElementById: () => null };
+        assert.equal(ActionBar.roomBelowFelt(), 0);
+    });
+
+    test("the felt gets the height the bar used to take", () => {
+        // The whole point, in one line. At 640x360 the bar was 205px of a 360px window
+        // and the felt got 85. Beside the table instead, the same window gives the felt
+        // everything but the header and the links.
+        const asABar = ActionBar.feltRoomFor(360, 205, 70);
+        const asARail = ActionBar.feltRoomFor(360, 30, 70);
+        assert.ok(asARail > asABar * 2, `${asABar}px became ${asARail}px`);
+    });
+});
+
+// ---------------------------------------------------------------------------
+
+describe("a name that will not fit", () => {
+    // Shortened at a word, not chopped in the middle of one. A puck is 34px of text on
+    // a nine-handed phone, and what the ellipsis produced for the four names on the test
+    // table was "Christo…", "Mike / from…", "Alexan…". Only one of those is throwing
+    // away something the dealer does not need: he is Mike, and the rest of it is how
+    // this table tells him from the other Mike.
+    //
+    // The label element is faked here rather than measured. What is under test is the
+    // ladder — which words go, in what order, and when it stops — and the browser's part
+    // is one boolean per pass.
+    const label = (text, fits) => {
+        const el = {
+            textContent: text,
+            title: "",
+            // The browser's answer, standing in for a real one: this name fits if
+            // `fits` says the version currently written to it does.
+            get scrollWidth() { return fits(this.textContent) ? 10 : 100; },
+            get clientWidth() { return 10; },
+            get scrollHeight() { return 10; },
+            get clientHeight() { return 10; },
+            querySelector: () => el,
+        };
+        return el;
+    };
+
+    const layer = (labels) => ({
+        children: labels,
+        childElementCount: labels.length,
+    });
+
+    const seatsNamed = (...names) => {
+        Render.state = { seats: names.map(name => ({ name })) };
+    };
+
+    test.afterEach(() => { Render.state = null; });
+
+    test("trailing words go until it fits", () => {
+        const el = label("Christopher John Robinson", text => text === "Christopher John");
+        seatsNamed("Christopher John Robinson");
+        Render.fitSeatNames(layer([el]));
+        assert.equal(el.textContent, "Christopher John");
+    });
+
+    test("and it will go all the way to the first word", () => {
+        const el = label("Christopher John Robinson", text => text === "Christopher");
+        seatsNamed("Christopher John Robinson");
+        Render.fitSeatNames(layer([el]));
+        assert.equal(el.textContent, "Christopher");
+    });
+
+    test("a name never ends on a word a name cannot end on", () => {
+        // Dropping "work" off "Mike from work" leaves "Mike from", which is not a
+        // shorter name — it is a name that looks cut off, and it reads worse than the
+        // ellipsis this was meant to replace. He is Mike.
+        const el = label("Mike from work", () => false);
+        seatsNamed("Mike from work");
+        Render.fitSeatNames(layer([el]));
+        assert.equal(el.textContent, "Mike");
+    });
+
+    test("and it takes a run of them in one go", () => {
+        const el = label("Al with the hat", () => false);
+        seatsNamed("Al with the hat");
+        Render.fitSeatNames(layer([el]));
+        assert.equal(el.textContent, "Al");
+    });
+
+    test("but a joining word inside a name is nobody's business", () => {
+        // The list is closed and small on purpose: it is not trying to understand names,
+        // only the handful of English joining words people label each other with at a
+        // home game. Anything it doesn't know stays, which is the safe way to be wrong —
+        // a name that keeps a word it could have dropped is merely long.
+        const el = label("Katarzyna Nowak Kowalska", text => text === "Katarzyna Nowak");
+        seatsNamed("Katarzyna Nowak Kowalska");
+        Render.fitSeatNames(layer([el]));
+        assert.equal(el.textContent, "Katarzyna Nowak");
+    });
+
+    test("dropping never goes below the first word", () => {
+        // Every word after the first being a joining word is not a real name, but it is
+        // typeable, and it must not come out empty.
+        assert.equal(Render.dropAWord(["Mike", "from", "of", "the"], 4), 1);
+        assert.equal(Render.dropAWord(["from", "the"], 2), 1);
+        assert.equal(Render.dropAWord(["Mike"], 1), 1, "one word has nothing to drop");
+    });
+
+    test("a single word is left to the ellipsis it always had", () => {
+        // There is no honest way to shorten "Christopher" that a dealer glancing across
+        // a table would read faster than "Christo…".
+        const el = label("Christopher", () => false);
+        seatsNamed("Christopher");
+        Render.fitSeatNames(layer([el]));
+        assert.equal(el.textContent, "Christopher", "never cut mid-word here");
+    });
+
+    test("a name that fits is not touched", () => {
+        const el = label("Mike from work", () => true);
+        seatsNamed("Mike from work");
+        Render.fitSeatNames(layer([el]));
+        assert.equal(el.textContent, "Mike from work");
+    });
+
+    test("the whole name is on the tooltip whether it was shortened or not", () => {
+        // A label clamped to two lines was already hiding some of it before any of this.
+        const shortened = label("Mike from work", text => text === "Mike");
+        const untouched = label("Bob", () => true);
+        seatsNamed("Mike from work", "Bob");
+        Render.fitSeatNames(layer([shortened, untouched]));
+        assert.equal(shortened.title, "Mike from work");
+        assert.equal(untouched.title, "Bob");
+    });
+
+    test("every seat is written to before any of them is measured", () => {
+        // Three passes over all the seats, not a loop per seat: each pass writes to
+        // every puck and then reads back from every puck, so the browser lays the felt
+        // out three times whatever the table's size. Interleaved, nine seats would cost
+        // nine layouts, and this runs on every render.
+        const reads = [];
+        const watched = (text, fits) => {
+            const el = label(text, fits);
+            Object.defineProperty(el, "scrollWidth", {
+                get() { reads.push(this.textContent); return fits(this.textContent) ? 10 : 100; },
+            });
+            return el;
+        };
+        const a = watched("Christopher John Robinson", t => t === "Christopher");
+        const b = watched("Katarzyna Nowak Kowalska", t => t === "Katarzyna");
+        seatsNamed("Christopher John Robinson", "Katarzyna Nowak Kowalska");
+        Render.fitSeatNames(layer([a, b]));
+
+        // Both names are read at each length before either is written down again.
+        assert.deepEqual(reads.slice(0, 2),
+            ["Christopher John Robinson", "Katarzyna Nowak Kowalska"]);
+        assert.deepEqual(reads.slice(2, 4), ["Christopher John", "Katarzyna Nowak"]);
+        assert.equal(a.textContent, "Christopher");
+        assert.equal(b.textContent, "Katarzyna");
+    });
+
+    test("an empty chair has no name to shorten", () => {
+        const el = label("", () => false);
+        seatsNamed("");
+        assert.doesNotThrow(() => Render.fitSeatNames(layer([el])));
+    });
+
+    test("and with no layer there is nothing to do", () => {
+        assert.doesNotThrow(() => Render.fitSeatNames(null));
+    });
+});
+
+// ---------------------------------------------------------------------------
+
+describe("pulling the ring back onto the table", () => {
+    // seatRingRadii works out the widest ring whose outermost puck still finishes inside
+    // the rail, and it is right about that — but it is right about a puck it measured
+    // before the ring moved, before the width search settled, and before a name was
+    // shortened or wrapped to a second line. Each of those changes a puck's height by up
+    // to 15px after the arithmetic is done.
+    //
+    // Measured on the running page, four of the thirteen viewports finished with the top
+    // seat 5-6px past the rail. Not a wrong formula: a stale input to a right one. So
+    // the ring is settled the way the audit judges it, by looking at where the pucks
+    // actually landed.
+    //
+    // The felt is 400x400 at (100, 100) throughout. Seats are placed by writing a
+    // percentage into style.left/top, which this reads back to work out where the puck
+    // would be — the same relationship the browser has, without a browser.
+    const felt = { left: 100, top: 100, right: 500, bottom: 500, width: 400, height: 400 };
+
+    const seat = (puckW, puckH, box) => ({
+        style: { left: "", top: "" },
+        classList: { toggle() {} },
+        getBoundingClientRect() {
+            // Whatever percentage was last written, resolved against the ring box.
+            const cx = box.left + (parseFloat(this.style.left) / 100) * box.width;
+            const cy = box.top + (parseFloat(this.style.top) / 100) * box.height;
+            return {
+                left: cx - puckW / 2, right: cx + puckW / 2,
+                top: cy - puckH / 2, bottom: cy + puckH / 2,
+                width: puckW, height: puckH,
+            };
+        },
+    });
+
+    // The ring box the percentages resolve against, deliberately the same as the felt so
+    // the arithmetic in the test stays readable.
+    const ringBox = { ...felt };
+
+    const setUp = (count, puckW, puckH) => {
+        const seats = Array.from({ length: count }, () => seat(puckW, puckH, ringBox));
+        Render.state = { seats: seats.map(() => ({ name: "" })), seatCount: count };
+        global.document = { getElementById: id => (id === "pokerTable"
+            ? { getBoundingClientRect: () => felt }
+            : { getBoundingClientRect: () => ringBox }) };
+        // ringBox() reads #seatsLayer; the fake above hands the same box back for it.
+        return { children: seats, childElementCount: seats.length };
+    };
+
+    const place = (layer, radii) => {
+        for (let i = 0; i < layer.childElementCount; i++) {
+            Render.placeSeat(layer.children[i], i, 1, radii);
+        }
+    };
+
+    const worstOverhang = layer => {
+        let over = 0;
+        for (let i = 0; i < layer.childElementCount; i++) {
+            const b = layer.children[i].getBoundingClientRect();
+            over = Math.max(over, felt.left - b.left, b.right - felt.right,
+                felt.top - b.top, b.bottom - felt.bottom);
+        }
+        return over;
+    };
+
+    test.afterEach(() => { Render.state = null; delete global.document; });
+
+    test("a ring already inside the rail is left exactly where it is", () => {
+        const layer = setUp(6, 60, 50);
+        const radii = { rx: 30, ry: 30 };
+        place(layer, radii);
+        assert.deepEqual(Render.settleSeatsOnTable(layer, 1, radii), radii);
+    });
+
+    test("a puck past the rail brings the whole ring in", () => {
+        // 44% of 400 puts a seat's centre 176px from the middle; half a 60px puck is
+        // another 30, against a felt whose half-height is 200. Six pixels over, at the
+        // top and the bottom and both sides — which is the size the running page was
+        // actually wrong by.
+        const layer = setUp(4, 60, 60);
+        const radii = { rx: 44, ry: 44 };
+        place(layer, radii);
+        assert.equal(Math.round(worstOverhang(layer)), 6, "the fault is there to fix");
+
+        const settled = Render.settleSeatsOnTable(layer, 1, radii);
+        assert.ok(settled.ry < radii.ry, "the ring came in");
+        assert.ok(worstOverhang(layer) <= Render.SEAT_SETTLE_SLACK_PX,
+            `still ${worstOverhang(layer).toFixed(1)}px over`);
+    });
+
+    test("it comes in by what it was over, not by a step it guessed", () => {
+        const layer = setUp(4, 60, 60);
+        const radii = { rx: 44, ry: 44 };
+        place(layer, radii);
+        const over = worstOverhang(layer);
+        const settled = Render.settleSeatsOnTable(layer, 1, radii);
+        // Six pixels of a 400px felt is 1.5% of the ring, so 44 becomes 42.5 — the
+        // measurement, not a step size that would have to be tuned per screen.
+        assert.equal(settled.ry.toFixed(2), (44 - (over / felt.height) * 100).toFixed(2));
+        assert.equal(settled.ry, 42.5);
+    });
+
+    test("and it stops at the floor rather than collapsing into the pot", () => {
+        // A puck taller than the felt has an overhang no ring can fix. Pulling in
+        // forever would put every seat on top of the pot badge, which is a worse table
+        // than one with a puck touching the rail.
+        const layer = setUp(4, 60, 600);
+        const radii = { rx: 40, ry: 40 };
+        place(layer, radii);
+        const settled = Render.settleSeatsOnTable(layer, 1, radii);
+        assert.equal(settled.ry, Render.RING_MIN_R);
+        assert.ok(settled.ry > 0);
+    });
+
+    test("a table with nothing laid out yet is handed back untouched", () => {
+        Render.state = { seats: [], seatCount: 0 };
+        global.document = { getElementById: () => null };
+        const radii = { rx: 44, ry: 42 };
+        assert.deepEqual(Render.settleSeatsOnTable({ children: [], childElementCount: 0 }, 1, radii), radii);
+    });
+
+    test("it is bounded — this runs after every tap a dealer makes", () => {
+        assert.ok(Render.SEAT_SETTLE_PASSES <= 2,
+            "each pass is a forced layout of the whole felt");
+        assert.ok(Render.SEAT_NAME_PASSES <= 3);
+    });
+});

tests/holdem/uiAudit.js

@@ -32,6 +32,204 @@ const LayoutAudit = {
         });
     },
 
+    // ---- Every control says what it is ----
+
+    // WCAG 4.1.2 wants a name on every control, and empty button names are among the
+    // most common failures on the web — WebAIM's 2025 sweep found them on a bit over a
+    // quarter of home pages. This tool had one: the × that removes a chip colour, five
+    // of them in a column, identical, each deleting a different colour, and one click
+    // of the wrong one took $22,500 off a table.
+    //
+    // A symbol counts as no name here even though it is technically text. "×" is
+    // announced as "times" and names nothing — the rule is that a name has to contain a
+    // letter or a digit, which is the difference between "×" and "Undo" or "+ Add chip
+    // color". Anything with aria-hidden is not in the tree at all and is skipped rather
+    // than judged.
+    controlNames() {
+        const named = el => {
+            const aria = (el.getAttribute("aria-label") || "").trim();
+            if (aria) return aria;
+
+            const by = el.getAttribute("aria-labelledby");
+            if (by) {
+                const text = by.split(/\s+/)
+                    .map(id => document.getElementById(id))
+                    .filter(Boolean)
+                    .map(node => (node.textContent || "").trim())
+                    .join(" ")
+                    .trim();
+                if (text) return text;
+            }
+
+            // A field's name usually comes from its label rather than from itself.
+            if (/^(INPUT|SELECT|TEXTAREA)$/.test(el.tagName)) {
+                const wrapping = el.closest("label");
+                const pointing = el.id ? document.querySelector(`label[for="${CSS.escape(el.id)}"]`) : null;
+                const text = [wrapping, pointing]
+                    .filter(Boolean)
+                    .map(node => (node.textContent || "").trim())
+                    .join(" ")
+                    .trim();
+                if (text) return text;
+                const placeholder = (el.getAttribute("placeholder") || "").trim();
+                if (placeholder) return placeholder;
+            }
+
+            const own = (el.textContent || "").trim();
+            if (own) return own;
+
+            const image = el.querySelector("img[alt]");
+            if (image) return (image.getAttribute("alt") || "").trim();
+
+            return (el.getAttribute("title") || "").trim();
+        };
+
+        const offenders = this.visibleControls()
+            .filter(el => !el.closest("[aria-hidden='true']"))
+            // A seat puck is in CONTROL_SELECTOR for the touch checks; its own name is
+            // the player's, and an empty chair is deliberately unnamed.
+            .filter(el => !el.classList.contains("seat"))
+            .map(el => ({ el, name: named(el) }))
+            .filter(({ name }) => !/[\p{L}\p{N}]/u.test(name))
+            .map(({ el, name }) => `${this.describe(el)} :: ${name ? `named only "${name}"` : "no accessible name"}`);
+
+        return { name: "every control has a name a screen reader can read", offenders };
+    },
+
+    // ---- Focus has somewhere to land ----
+
+    // Everything fixed to the bottom of the window, as one band. The action bar and the
+    // toast stack, so what matters is the top edge of the highest of them.
+    //
+    // Only things crossing the middle of the screen count. A landscape phone turns the
+    // bar into a rail down the right-hand side, which is bottom-anchored and full height
+    // — measuring that as "furniture at the bottom" would demand scroll padding the
+    // height of the whole window.
+    bottomFurniture() {
+        const middle = innerWidth / 2;
+        // A sticky element is anchored to whatever scrolls it, which is only the window
+        // when nothing between it and the root scrolls. The standings table has a sticky
+        // header inside a panel that scrolls on its own; it comes to rest against the
+        // bottom of the window often enough to be picked up here, and it is not
+        // furniture — scroll-padding on the document would do nothing about it.
+        const anchoredToWindow = node => {
+            if (getComputedStyle(node).position === "fixed") return true;
+            for (let up = node.parentElement; up && up !== document.body; up = up.parentElement) {
+                if (/auto|scroll|overlay/.test(getComputedStyle(up).overflowY)) return false;
+            }
+            return true;
+        };
+
+        return [...document.querySelectorAll("*")].filter(node => {
+            const cs = getComputedStyle(node);
+            if (cs.position !== "fixed" && cs.position !== "sticky") return false;
+            if (cs.visibility === "hidden" || cs.display === "none" || node.hidden) return false;
+            const b = node.getBoundingClientRect();
+            if (b.width === 0 || b.height === 0) return false;
+            if (b.bottom < innerHeight - 2 || b.left > middle || b.right < middle) return false;
+            return anchoredToWindow(node);
+        });
+    },
+
+    // WCAG 2.2 SC 2.4.11: a focused control must not be completely hidden by content the
+    // page put on top of it.
+    //
+    // A fixed bar is not in the flow, so the browser does not know it is there: Tab to a
+    // control near the bottom and it is scrolled flush against the edge of the window,
+    // under the bar, and the browser considers it done. Tabbing the whole page on a
+    // 390x844 phone found 16 stops resting completely covered and 27 more partly.
+    //
+    // Checked as the fix rather than the symptom, because the symptom needs a keyboard
+    // and this file has no automation of its own: scroll-padding-bottom on the scroll
+    // container has to reserve at least as much room as the furniture standing there.
+    focusHasRoom() {
+        const furniture = this.bottomFurniture();
+        if (furniture.length === 0) {
+            return { name: "focus has room under the fixed bar", offenders: [],
+                     skipped: "nothing is fixed to the bottom here" };
+        }
+
+        const highest = Math.min(...furniture.map(node => node.getBoundingClientRect().top));
+        const needed = Math.round(innerHeight - highest);
+        const declared = parseFloat(getComputedStyle(document.documentElement).scrollPaddingBottom);
+        const reserved = Number.isFinite(declared) ? Math.round(declared) : 0;
+
+        const offenders = reserved >= needed ? [] : [
+            `${furniture.map(n => this.describe(n)).join(" + ")} stands ${needed}px tall, ` +
+            `and scroll-padding-bottom reserves ${reserved}px — a control tabbed to down there ` +
+            `comes to rest ${needed - reserved}px inside it`,
+        ];
+        return { name: "focus has room under the fixed bar", offenders };
+    },
+
+    // ---- The furniture is not allowed to eat the table ----
+
+    // How much of the window the fixed bottom band is taking.
+    //
+    // The action bar's height is not a constant: it carries the pot breakdown, which had
+    // one row per all-in and no ceiling. Measured on a 360x640 phone — five players
+    // idle, 151px; six all-in, 303px; twelve all-in, 411px, which is 64% of the screen,
+    // leaving 96px of felt to draw twelve seats in. Nothing in the sweep could see it,
+    // because every check here asks whether a thing is covered or clipped and none of
+    // them asked how much room the covering thing had taken.
+    //
+    // Two lines, because there are two different claims. Half the window is the one
+    // worth failing on: furniture bigger than the content it serves is indefensible
+    // whatever it is showing, and it is a shape fault rather than a matter of taste.
+    // Thirty percent is the published guidance for persistent chrome and it is a warning
+    // here, because the shortest phone in the list does not meet it at rest — the bar is
+    // 151px of a 640px screen before anything happens — and a sweep that is always red
+    // stops being read.
+    furnitureBudget() {
+        const name = "the fixed bar leaves the table its room";
+        const furniture = this.bottomFurniture();
+        if (furniture.length === 0) {
+            return { name, offenders: [], skipped: "nothing is fixed to the bottom here" };
+        }
+
+        const highest = Math.min(...furniture.map(node => node.getBoundingClientRect().top));
+        const tall = Math.round(innerHeight - highest);
+        const share = Math.round((100 * tall) / innerHeight);
+        const what = furniture.map(n => this.describe(n)).join(" + ");
+
+        return {
+            name,
+            offenders: share > 50
+                ? [`${what} stands ${tall}px of a ${innerHeight}px window — ${share}%, ` +
+                   `leaving the felt less room than the furniture`]
+                : [],
+            warnings: share > 30
+                ? [`${name}: ${what} is ${share}% of the window (${tall}px of ${innerHeight}px); ` +
+                   `persistent chrome is usually kept under 30%`]
+                : [],
+        };
+    },
+
+    // The other half: a control that scrolling can never reach at all.
+    //
+    // The seat editor is a bottom sheet on a phone, and it was put away with
+    // `transform: translateY(105%)` — which moves it and nothing else. Parked below an
+    // 844px window at y=850, its Done button was still in the tab order and still on the
+    // accessibility tree, and because a fixed element does not move when the page does,
+    // no amount of scrolling could bring it back. visibility:hidden puts it away; a
+    // transform only moves it.
+    focusablesReachable() {
+        const offenders = this.visibleControls()
+            .filter(el => {
+                for (let node = el; node; node = node.parentElement) {
+                    if (getComputedStyle(node).position === "fixed") return true;
+                }
+                return false;
+            })
+            .filter(el => {
+                const b = el.getBoundingClientRect();
+                return b.top >= innerHeight || b.bottom <= 0 || b.left >= innerWidth || b.right <= 0;
+            })
+            .map(el => `${this.describe(el)} :: fixed and off-screen, so nothing can scroll to it`);
+
+        return { name: "no control is parked where scrolling can't reach it", offenders };
+    },
+
     // ---- Touch (see the mobile round) ----
 
     // Without touch-action: manipulation a mobile browser holds every tap for ~300ms
@@ -93,6 +291,20 @@ const LayoutAudit = {
         return false;
     },
 
+    // The scrolling ancestor whose box this element has fallen outside of, if any.
+    // Wholly outside — an element straddling the edge is still half on show, and the
+    // half that is showing is worth hit-testing.
+    clippedOutBy(el, rect) {
+        for (let node = el.parentElement; node; node = node.parentElement) {
+            const style = getComputedStyle(node);
+            if (!/auto|scroll|hidden|overlay|clip/.test(style.overflowY + style.overflowX)) continue;
+            const box = node.getBoundingClientRect();
+            if (rect.top >= box.bottom - 0.5 || rect.bottom <= box.top + 0.5 ||
+                rect.left >= box.right - 0.5 || rect.right <= box.left + 0.5) return node;
+        }
+        return null;
+    },
+
     // The modal that is currently on top, if any.
     //
     // Every check below asks "is this thing reachable", and while a sheet or dialog is
@@ -143,6 +355,22 @@ const LayoutAudit = {
                 return;
             }
 
+            // Still on screen, but clipped away by a panel that scrolls. Hit-testing it
+            // is meaningless: the point lands on whatever the panel's own edge has next
+            // to it, and the answer comes back as a diagnosis of something that isn't
+            // happening. The pot wizard's third winner, below the fold in a list that
+            // scrolls, was reported for four viewports running as "fully covered by
+            // button Confirm Winner(s)" — the button is simply what is painted at that
+            // height. Whether it is a fault is the same question as for anything else
+            // out of view: can it be scrolled to.
+            const clip = this.clippedOutBy(el, rect);
+            if (clip) {
+                if (!this.reachableByScrolling(el)) {
+                    offenders.push(`${this.describe(el)} :: clipped out of ${this.describe(clip)}, which cannot be scrolled to it`);
+                }
+                return;
+            }
+
             const points = [
                 [rect.left + rect.width / 2, rect.top + rect.height / 2],
                 [rect.left + rect.width * 0.25, rect.top + rect.height * 0.3],
@@ -393,6 +621,54 @@ const LayoutAudit = {
         }
     },
 
+    // How much of this element actually reaches the screen, and what is behind the
+    // thing doing the fading.
+    //
+    // `opacity` on a box fades the whole box — its text and its own background together
+    // — onto whatever sits behind that box. So a dimmed seat is not "grey text on a
+    // dark puck"; it is a faded puck and faded text both landing on the felt. Both
+    // halves have to be composited the same way or the number means nothing.
+    fading(el) {
+        let alpha = 1;
+        let outermost = null;
+        for (let node = el; node; node = node.parentElement) {
+            const own = parseFloat(getComputedStyle(node).opacity);
+            if (own < 0.99) {
+                alpha *= own;
+                outermost = node;
+            }
+        }
+        if (!outermost) return { alpha: 1, behind: null };
+        return { alpha, behind: this.backgroundCandidates(outermost.parentElement || document.body)[0] || null };
+    },
+
+    // The two colours as the screen actually shows them, once the fading is applied.
+    asPainted(fgRaw, bg, fade) {
+        const solid = fgRaw.a === 1 ? fgRaw : this.over(fgRaw, bg);
+        if (fade.alpha >= 0.99 || !fade.behind) return { fg: solid, bg };
+        return {
+            fg: this.over({ ...solid, a: solid.a * fade.alpha }, fade.behind),
+            bg: this.over({ ...bg, a: bg.a * fade.alpha }, fade.behind),
+        };
+    },
+
+    // Two things this check cannot do, both found by measuring against real pixels in
+    // runContrastAudit.js and neither of them fixable from inside a DOM walk:
+    //
+    // 1. It reads `background-color`, so anything painted by a gradient is invisible to
+    //    it. The chair number on an empty seat sat on the felt's brown rim at 2.65:1 and
+    //    the pot's label on green at 2.66:1 — two plain AA failures this reported clean,
+    //    for years, because it never saw either background.
+    // 2. Where an element has several candidate ancestors it takes the best contrast of
+    //    any of them ("the kindest reading available", below). That is the right instinct
+    //    for a fade, and it is what let (1) through: the flattering candidate was the
+    //    dark page behind the felt, which is not what the text is sitting on.
+    //
+    // Both are why the sibling audit screenshots the page with its text made transparent
+    // and samples the pixels instead. This one is kept because AA is the number an
+    // accessibility audit will ask for, and because it runs against a live DOM with no
+    // screenshot to decode — but a clean result here is not a claim that the page is
+    // readable. That claim belongs to the APCA sweep.
     contrast({ minimum = 4.5, largeMinimum = 3, selector = null } = {}) {
         const offenders = [];
         const unmeasured = [];
@@ -426,12 +702,17 @@ const LayoutAudit = {
             // exempt — there's nothing to read at zero — but anything in between is
             // reported as unmeasured rather than passed over in silence, because a
             // number nobody checked is not the same as a number that's fine.
-            const opacity = parseFloat(style.opacity);
-            if (opacity <= 0.02) return;
-            const faded = opacity < 0.99 ||
-                [...this.ancestors(el)].some(a => parseFloat(getComputedStyle(a).opacity) < 0.99);
-            if (faded) {
-                unmeasured.push(`${this.describe(el)} :: faded (opacity ${opacity}), contrast not checked`);
+            const fade = this.fading(el);
+            if (fade.alpha <= 0.02) return;
+
+            // A control that is switched off is the one exemption WCAG itself grants —
+            // an inactive component has no contrast requirement, which is why every
+            // toolkit dims them. Said out loud rather than skipped in silence: this is
+            // the only exemption in here, and the moment a dimmed thing turns out to be
+            // live it stops applying.
+            const off = el.closest("[disabled], [aria-disabled='true']");
+            if (off) {
+                unmeasured.push(`${this.describe(el)} :: disabled control, exempt from AA`);
                 return;
             }
             // aria-hidden used to exempt text here, on the grounds that decoration
@@ -459,8 +740,8 @@ const LayoutAudit = {
             // The kindest reading available: best contrast across every candidate.
             let best = 0;
             candidates.forEach(bg => {
-                const fg = fgRaw.a === 1 ? fgRaw : this.over(fgRaw, bg);
-                best = Math.max(best, this.contrastRatio(fg, bg));
+                const painted = this.asPainted(fgRaw, bg, fade);
+                best = Math.max(best, this.contrastRatio(painted.fg, painted.bg));
             });
 
             const sizePx = parseFloat(style.fontSize);
@@ -543,6 +824,17 @@ const LayoutAudit = {
             .filter(el => el.type !== "color")
             .filter(el => !(exempt && el.matches(exempt)))
             .forEach(el => {
+                // A link inside a sentence is the one target WCAG itself carves out:
+                // its size is set by the line it sits in, and padding a word out to
+                // 44px would break the paragraph around it. The rule is about controls
+                // a thumb goes hunting for, not words in prose. Said out loud, and
+                // narrow — display:inline, and real text either side of it.
+                if (el.tagName === "A" && getComputedStyle(el).display === "inline" &&
+                    el.parentElement &&
+                    [...el.parentElement.childNodes].some(n => n.nodeType === 3 && n.textContent.trim())) {
+                    unmeasured.push(`${this.describe(el)} :: link inside a sentence, sized by the line`);
+                    return;
+                }
                 // A control inside a scrolling sheet can sit below its container's
                 // visible area while still having a viewport rect. elementFromPoint at
                 // its centre then returns the sheet, effectiveTarget gives up, and the
@@ -605,6 +897,14 @@ const LayoutAudit = {
     //
     // Reported separately from occlusion because the cause is different: not an
     // overlay on top of the table, but two pieces of the table fighting over a tap.
+    //
+    // It then made the same mistake one level down. `seat.contains(hit)` waved through
+    // anything inside the seat, and the dealer chip is inside the seat: when its hit
+    // pad was moved *inward* to stop it reaching the neighbours, it covered its own
+    // seat's middle instead and this check called that fine. The chip's handler calls
+    // stopPropagation, so those taps reached nothing — on a fresh table the button is
+    // on seat 1, and seating the first player was the one thing on the felt that did
+    // not work. A control inside the seat is a rival for the tap, not part of the seat.
     seatOwnership() {
         // Seats behind an open sheet aren't fighting each other for taps — nothing is
         // meant to reach them at all. Asking the question there produced six offenders
@@ -624,13 +924,29 @@ const LayoutAudit = {
             if (x < 0 || y < 0 || x >= innerWidth || y >= innerHeight) return;
 
             const hit = document.elementFromPoint(x, y);
-            if (!hit || seat.contains(hit) || hit === seat) return;
+            if (!hit) return;
+
+            // The nearest control at that point, if any. A control is a rival for the
+            // tap wherever it lives — the seat's own chip swallows the event as surely
+            // as the seat next door's does.
+            const CONTROLS = "button, a, input, select, textarea, [role='button']";
+            const rival = hit.closest ? hit.closest(CONTROLS) : null;
+
+            if (rival && seat.contains(rival)) {
+                offenders.push(
+                    `seat ${index + 1}'s centre goes to its own ${this.describe(rival)}`
+                );
+                return;
+            }
+
+            // Its own name, stack or felt. That is the seat, and a tap there is a tap
+            // on the seat.
+            if (!rival && (hit === seat || seat.contains(hit))) return;
 
             const other = hit.closest(".seat");
             const who = other ? `seat ${seats.indexOf(other) + 1}` : this.describe(hit);
-            const control = hit.matches && hit.matches("button, a, input, select, [role='button']");
             offenders.push(
-                `seat ${index + 1}'s centre goes to ${who}${control ? "'s " + this.describe(hit) : ""}`
+                `seat ${index + 1}'s centre goes to ${who}${rival ? "'s " + this.describe(rival) : ""}`
             );
         });
 
@@ -672,10 +988,546 @@ const LayoutAudit = {
         return { name: "the felt shows one dealer button", offenders };
     },
 
+    // Anything that says it is hidden and is drawn anyway.
+    //
+    // `hidden` gets its `display: none` from the browser's own stylesheet, the weakest
+    // rule in the cascade, so any class that sets a display beats it — and in this tool
+    // every button class does. The result is an element the code believes is gone,
+    // sitting on the screen: found as a 21x44 empty box under the bank check, and this
+    // file's own touch check had been calling it "could not be probed" rather than
+    // saying the plainer thing, which is that it should not be there at all.
+    hiddenButPainted() {
+        const offenders = [...document.querySelectorAll("[hidden]")]
+            .filter(el => {
+                const rect = el.getBoundingClientRect();
+                if (rect.width === 0 || rect.height === 0) return false;
+                const style = getComputedStyle(el);
+                return style.display !== "none" && style.visibility !== "hidden";
+            })
+            .map(el => `${this.describe(el)} :: hidden, but drawn ${Math.round(el.getBoundingClientRect().width)}x${Math.round(el.getBoundingClientRect().height)}`);
+        return { name: "hidden means hidden", offenders };
+    },
+
+    // A mark on the felt that stands for nothing.
+    //
+    // The amount pill inside every seat puck has a background, a pill radius and side
+    // padding, so a player who had not put chips in yet got an 8x11px green lozenge
+    // where their bet would go — measured on seven of nine seats at an ordinary table.
+    // One of those is a component holding its place; nine of them is a rash, and a
+    // dealer reading the felt has to learn to ignore a colour that on three other seats
+    // means "this player has money out".
+    //
+    // It cost room as well as attention. The ring is sized from the tallest puck on it,
+    // so a row nobody had filled was setting how far apart the seats had to sit.
+    //
+    // The rule is about paint, not about space: an element may hold its place invisibly,
+    // and several here do. What it may not do is draw a background or a border with
+    // nothing inside it.
+    //
+    // One real exemption, and it is on the list because the check reported it rather
+    // than because it was predicted: .betChipDisc is a 13x13px circle filled with the
+    // denomination colour of the chip beside it, published per chip from render.js. It
+    // has no text because the colour *is* the content. Anything carrying its own
+    // picture in a background-image is exempt on the same grounds, without needing to be
+    // named. Nothing else here needs an entry — three others were guessed at first and
+    // matched no element on the page, which is its own warning about writing this list
+    // from memory instead of from a run.
+    emptyDecoration() {
+        const DECORATIVE = new Set(["betChipDisc"]);
+        const opaque = value => value && value !== "none" && !/rgba\([^)]*,\s*0\s*\)/.test(value)
+            && value !== "rgba(0, 0, 0, 0)" && value !== "transparent";
+
+        const offenders = [...document.querySelectorAll("#pokerTableWrap *")]
+            .filter(el => {
+                if (el.children.length || (el.textContent || "").trim()) return false;
+                if ([...el.classList].some(c => DECORATIVE.has(c))) return false;
+                const box = el.getBoundingClientRect();
+                if (box.width < 2 || box.height < 2) return false;
+                const cs = getComputedStyle(el);
+                if (cs.display === "none" || cs.visibility === "hidden" || Number(cs.opacity) === 0) return false;
+                if (opaque(cs.backgroundImage)) return false;
+                return opaque(cs.backgroundColor) ||
+                    ["Top", "Right", "Bottom", "Left"].some(side =>
+                        parseFloat(cs[`border${side}Width`]) > 0 && opaque(cs[`border${side}Color`]));
+            })
+            .map(el => {
+                const box = el.getBoundingClientRect();
+                return `${this.describe(el)} :: nothing in it, painted ` +
+                    `${Math.round(box.width)}x${Math.round(box.height)}px`;
+            });
+
+        return { name: "nothing on the felt is painted for nothing", offenders };
+    },
+
+    // One green, and it is the thing to do next.
+    //
+    // The accent is a promise: this is the step. It only works while it is spent on one
+    // control at a time, and it was being spent on two. Measured over a whole hand,
+    // seventeen steps, before this went in: two accent controls at thirteen of them —
+    // the bar's Call and the header's Resolve Pot, the identical gradient at opposite
+    // ends of a phone — and at the other four the header alone, while the bar held the
+    // only button there was to press. At showdown the bar's own "Showdown — resolve
+    // pot" was blue-grey and the corner shortcut was green.
+    //
+    // A modal is its own view, so while one is open only what is inside it is judged —
+    // a wizard's confirm is the primary action of the wizard, and the bar underneath it
+    // is not on screen in any sense that matters. That is the same scoping rule the
+    // occlusion check uses, and it comes from the same helper.
+    //
+    // Zero is not a failure. Between hands with nobody seated there is genuinely no next
+    // step, and inventing one to keep a colour company would be worse than the silence.
+    //
+    // Six broken versions were run at it and six were caught, but two of them only after
+    // the injection itself was fixed, and both failures were the same mistake: painting
+    // a control green is not the same as putting a green control in front of anybody.
+    // The first attempt turned every sidebar button green with the panels shut, so the
+    // rule landed on nothing that was rendered — `getComputedStyle` reported the accent
+    // gradient and `offsetParent` was still null. The second opened the panels first,
+    // which rendered the button and left it four hundred pixels below the fold, where
+    // this check is meant to ignore it. Scrolled into view, the same green "Add" is
+    // named in the same breath as the bar's Call, and taking the green off goes clean
+    // again. So: read back the computed paint AND the box, on both counts, before
+    // believing a clean result means the check is looking.
+    ACCENT_FILL: [22, 120, 58],
+    ACCENT_TOLERANCE: 24,
+
+    wearsTheAccent(el) {
+        const cs = getComputedStyle(el);
+        const paint = `${cs.backgroundColor} ${cs.backgroundImage}`;
+        return [...paint.matchAll(/rgba?\(([^)]+)\)/g)]
+            .map(m => m[1].split(",").map(Number))
+            .some(([r, g, b, a]) => (a === undefined || a > 0.5) &&
+                Math.abs(r - this.ACCENT_FILL[0]) <= this.ACCENT_TOLERANCE &&
+                Math.abs(g - this.ACCENT_FILL[1]) <= this.ACCENT_TOLERANCE &&
+                Math.abs(b - this.ACCENT_FILL[2]) <= this.ACCENT_TOLERANCE);
+    },
+
+    oneNextStep() {
+        const scope = this.modalScope();
+        const root = scope || document;
+        const onScreen = el => {
+            const r = el.getBoundingClientRect();
+            if (!r.width || !r.height) return false;
+            const cs = getComputedStyle(el);
+            if (cs.visibility === "hidden" || +cs.opacity === 0) return false;
+            return r.bottom > 0 && r.top < innerHeight && r.right > 0 && r.left < innerWidth;
+        };
+
+        const green = [...root.querySelectorAll("button, a.holdemBtn")]
+            .filter(el => el.offsetParent !== null && onScreen(el) && this.wearsTheAccent(el));
+
+        if (green.length <= 1) {
+            return { name: "one green, and it is the next step", offenders: [] };
+        }
+        return {
+            name: "one green, and it is the next step",
+            offenders: [`${green.length} controls wear the accent at once` +
+                `${scope ? " inside the open sheet" : ""}: ` +
+                green.map(el => `"${(el.textContent || "").trim().slice(0, 24)}" in ` +
+                    `${el.closest("#holdemHeader") ? "the header"
+                        : el.closest("#actionBar") ? "the action bar"
+                        : el.closest("#holdemSidebar") ? "the sidebar" : "the page"}`).join(", ")],
+        };
+    },
+
+    // The status a shut sidebar panel wears, and the three ways it can go wrong.
+    //
+    // Each of the eight <details> in the sidebar now carries the one fact you would
+    // have opened it for — "Balanced", "2 waiting", "5 colours · $1–$500". They are the
+    // sidebar's whole navigation, and what makes them scannable is that they are eight
+    // identical slabs: a glance that pushes one row taller than the rest costs more in
+    // rhythm than the fact it added is worth. Two of the strings aren't ours to keep
+    // short — a table note is whatever the dealer typed, and the amounts grow with the
+    // stakes — so this is checked on the page rather than argued about in the markup.
+    //
+    // Four questions, and they fail in different directions. A row that grew is the
+    // layout one. A glance sitting on its own label is the narrow-screen one, and it is
+    // the one that will come back: it takes a long label and a long glance in the same
+    // panel, so it depends on the state and the viewport together. And a glance
+    // ellipsised down to "Sam…" is worth less than no glance at all — it has spent a
+    // row's width to say that a note exists, which the panel's own presence already
+    // said.
+    GLANCE_MIN_READABLE_PX: 60,
+
+    glancesFitTheirRows() {
+        // Rows that are actually drawn. The Keyboard panel is display: none under
+        // `pointer: coarse` — a touch device has no keys to press — and a panel that
+        // isn't rendered measures 0px, which the shortest-row rule below happily took
+        // as its idea of a bare row. Every real row then read as grown: caught by the
+        // sweep on its first clean run, 91 offenders, seven rows across each of the
+        // thirteen viewports visited with a thumb.
+        const rows = [...document.querySelectorAll(".sidebarPanel > summary")]
+            .filter(row => row.getBoundingClientRect().height > 0);
+        if (!rows.length) return { name: "panel glances fit their rows", offenders: [], skipped: "no sidebar here" };
+
+        // The shortest row in the sidebar is what a row with nothing on it measures,
+        // whichever one that happens to be — taken rather than declared, so a change to
+        // the header's padding doesn't quietly make this check pass by moving the bar.
+        const heights = rows.map(row => row.getBoundingClientRect().height);
+        const bare = Math.min(...heights);
+
+        const offenders = [];
+        rows.forEach((row, index) => {
+            const glance = row.querySelector(".panelGlance");
+            const label = row.querySelector("h2");
+            const rowBox = row.getBoundingClientRect();
+            const name = (label && label.textContent.trim()) || `panel ${index + 1}`;
+
+            if (heights[index] > bare + 1) {
+                offenders.push(`${name} :: row is ${Math.round(heights[index])}px against ` +
+                    `${Math.round(bare)}px for a row with nothing on it`);
+            }
+            if (!glance || glance.hidden || !glance.textContent.trim()) return;
+
+            const box = glance.getBoundingClientRect();
+            if (label) {
+                const labelBox = label.getBoundingClientRect();
+                if (box.left < labelBox.right) {
+                    offenders.push(`${name} :: "${glance.textContent}" sits on the label, ` +
+                        `${Math.round(labelBox.right - box.left)}px into it`);
+                }
+            }
+            // Both axes, and the vertical one is the half that matters. The row's own
+            // height cannot be trusted to report this: the first version of this check
+            // asked only whether a row had grown, and a glance floated back into flow
+            // and allowed to wrap sailed straight through it — a float doesn't expand
+            // the box it sits in, so two lines of note hung 9px clear of a row that
+            // still measured exactly 44px. Asking where the glance actually
+            // ended up is the question that has an answer.
+            const out = [
+                box.right > rowBox.right + 1 ? "off the right" : null,
+                box.left < rowBox.left - 1 ? "off the left" : null,
+                box.top < rowBox.top - 1 ? `${Math.round(rowBox.top - box.top)}px out of the top` : null,
+                box.bottom > rowBox.bottom + 1 ? `${Math.round(box.bottom - rowBox.bottom)}px out of the bottom` : null,
+            ].filter(Boolean);
+            if (out.length) {
+                offenders.push(`${name} :: "${glance.textContent}" hangs ${out.join(" and ")} of its row`);
+            }
+            if (box.width < this.GLANCE_MIN_READABLE_PX &&
+                glance.scrollWidth > glance.clientWidth + 1) {
+                offenders.push(`${name} :: "${glance.textContent}" is cut down to ` +
+                    `${Math.round(box.width)}px, which says less than nothing`);
+            }
+        });
+
+        return { name: "panel glances fit their rows", offenders };
+    },
+
+    // A seat's name, painted under the decoration on its own puck.
+    //
+    // The chip that marks the button sits in the puck's top-right corner on a layer
+    // above the text, and the name is centred across the whole width. A long one
+    // therefore ran underneath it and stopped — measured, "Christopher" on the button
+    // lost 20px of its 64px box and showed no ellipsis, because as far as the text was
+    // concerned it had all the room it needed. Nothing else here would have caught it:
+    // the occlusion check is about controls a thumb has to reach, and this is a label
+    // a dealer has to read.
+    // Measured against the lines of text as they were painted, not against the box they
+    // live in. This used to take the box and subtract its padding, on the reasoning that
+    // "padding is room the text has already been kept out of" — which is true, and is
+    // not the only way to keep text out of somewhere. A right float does it too, and it
+    // does it per line, which is the point of using one: the name on the button seat is
+    // now indented past the chip on the line beside it and full width on the line below.
+    // Box-minus-padding cannot see that, and called every seat in the sweep an offender
+    // while the text sat exactly where it was supposed to.
+    //
+    // Range rects are the direct question — where did this text actually end up — so
+    // padding, floats, centring, wrapping and a short label in a wide box all come out
+    // right without any of them being modelled. Line boxes rather than one bounding box,
+    // too: a two-line name that clears the chip on the line beside it is not covered
+    // because its *other* line happens to sit under where the chip is.
+    seatLabelsClear() {
+        const offenders = [];
+        document.querySelectorAll(".seat").forEach(seat => {
+            const name = seat.querySelector(".seatPuckName");
+            if (!name || !name.textContent.trim()) return;
+
+            const range = document.createRange();
+            range.selectNodeContents(name);
+            const lines = [...range.getClientRects()].filter(line => line.width > 1 && line.height > 1);
+            if (!lines.length) return;
+
+            seat.querySelectorAll(".dealerChip, .blindBadge").forEach(mark => {
+                const over = mark.getBoundingClientRect();
+                if (!over.width || !over.height) return;
+                const marked = getComputedStyle(mark);
+                if (marked.display === "none" || marked.visibility === "hidden" ||
+                    parseFloat(marked.opacity) < 0.05) return;
+
+                let worst = 0;
+                lines.forEach(line => {
+                    const across = Math.min(line.right, over.right) - Math.max(line.left, over.left);
+                    const down = Math.min(line.bottom, over.bottom) - Math.max(line.top, over.top);
+                    if (across > 1 && down > 1) worst = Math.max(worst, across);
+                });
+                if (worst > 1) {
+                    offenders.push(`${this.describe(name)} :: ${Math.round(worst)}px under ${this.describe(mark)}`);
+                }
+            });
+        });
+        return { name: "seat names aren't painted under their own badges", offenders };
+    },
+
+    // A seat's writing, covered by something belonging to a different seat.
+    //
+    // seatLabelsClear() above asks whether a puck's own decoration sits on its own name.
+    // This asks the other half, and the other half was where the tool was actually
+    // failing: measured across nine viewports and six table sizes before this went in,
+    // seventeen of fifty-four tables had one seat's name or stack painted under a
+    // neighbour. On a Galaxy S8 at the most ordinary table there is — six players at a
+    // nine-handed table — seat 2's stack was under seat 3's puck, and five pairs of
+    // seats overlapped, the worst by 61px.
+    //
+    // Two ways in, and it takes both:
+    //   - the pucks themselves overlapping, which the layout used to permit on the
+    //     reasoning that rounded corners forgive a little; what they were forgiving was
+    //     a four-figure stack.
+    //   - a blind badge hanging off its puck onto the seat next door, which no amount
+    //     of space between the pucks fixes on its own.
+    //
+    // Hit-tested against the glyph run rather than the element box. A name is centred,
+    // so its box is wider than its ink and testing the box would fail on empty air.
+    //
+    // The glyph run is then clipped back to what is actually painted, which is not the
+    // same thing and cost this check its first honest-looking failure. A puck's name is
+    // a `-webkit-box` with `line-clamp`, and getClientRects() hands back a rect for every
+    // line the text *would* have taken — including the two that the clamp throws away.
+    // Measured at 640x360 with twelve players: "Mike from work" reported a line 30px
+    // below its own puck, which duly hit-tested onto the seat underneath, and the seats
+    // were not touching at all. Nothing is painted there, so nothing can cover it.
+    seatsKeepTheirText() {
+        const name = "no seat covers another seat's writing";
+        if (this.modalScope()) {
+            return { name, offenders: [], skipped: "a sheet is open over the table" };
+        }
+        const seats = [...document.querySelectorAll(".seat")];
+        if (!seats.length) return { name, offenders: [], skipped: "no seats on this page" };
+
+        const offenders = [];
+        seats.forEach((seat, index) => {
+            seat.querySelectorAll(".seatPuckName, .seatPuckStack, .seatPuckTotal").forEach(label => {
+                const text = label.textContent.trim();
+                if (!text) return;
+                const painted = label.getBoundingClientRect();
+                if (!painted.width || !painted.height) return;
+                const range = document.createRange();
+                range.selectNodeContents(label);
+                [...range.getClientRects()].forEach(raw => {
+                    const line = {
+                        left: Math.max(raw.left, painted.left),
+                        right: Math.min(raw.right, painted.right),
+                        top: Math.max(raw.top, painted.top),
+                        bottom: Math.min(raw.bottom, painted.bottom),
+                    };
+                    if (line.right - line.left <= 1 || line.bottom - line.top <= 1) return;
+                    // Along the line rather than at its middle: a badge takes the start
+                    // of it and a neighbouring puck the end, and a single centre probe
+                    // walks past both.
+                    //
+                    // Every probe, not the first one that hits. How much of the line is
+                    // gone is the difference between a stack a dealer cannot read and a
+                    // hairline where a badge's rounded corner grazes the last digit, and
+                    // reporting both as "is under" gave no way to tell them apart — the
+                    // one residual this sweep has carried for three rounds turns out to
+                    // be one probe of seven.
+                    let hits = 0;
+                    let culprit = null;
+                    let probes = 0;
+                    for (let across = 0.08; across <= 0.92; across += 0.14) {
+                        const x = line.left + (line.right - line.left) * across;
+                        const y = (line.top + line.bottom) / 2;
+                        probes++;
+                        const over = document.elementFromPoint(x, y);
+                        if (!over || seat.contains(over) || over.contains(seat)) continue;
+                        hits++;
+                        if (!culprit) culprit = over;
+                    }
+                    if (culprit) {
+                        offenders.push(`seat ${index + 1} "${text}" is ${hits}/${probes} `
+                            + `under ${this.describe(culprit)}`);
+                    }
+                });
+            });
+        });
+
+        return { name, offenders };
+    },
+
+    // The other thing on the felt that carries a number.
+    //
+    // A chip says what a player has put in this street, which is what a call costs. Two
+    // of them on top of each other is two figures a dealer can't read, and one behind a
+    // puck is a figure that isn't there at all.
+    //
+    // Geometry rather than hit-testing, which is the opposite of how every other check
+    // here works and is forced: #betsLayer is `pointer-events: none`, so elementFromPoint
+    // never returns a chip — it returns whatever is behind it, for every chip, always.
+    // A first version of this probe hit-tested and duly reported all forty-five
+    // configurations as broken, including the ones that were fine. Paint order is known
+    // and fixed instead: #betsLayer comes before #seatsLayer in the document and a seat
+    // carries `z-index: 1`, so a puck a chip overlaps is a puck that chip is behind.
+    chipsKeepTheirAmounts() {
+        const name = "no bet chip is hidden behind a seat or another chip";
+        if (this.modalScope()) {
+            return { name, offenders: [], skipped: "a sheet is open over the table" };
+        }
+        const chips = [...document.querySelectorAll(".betChip")]
+            .filter(c => { const r = c.getBoundingClientRect(); return r.width > 0 && r.height > 0; });
+        if (!chips.length) return { name, offenders: [], skipped: "no bets on the felt" };
+
+        const overlap = (A, B) =>
+            Math.min(A.right, B.right) - Math.max(A.left, B.left) > 0.5 &&
+            Math.min(A.bottom, B.bottom) - Math.max(A.top, B.top) > 0.5;
+        const offenders = [];
+        const seats = [...document.querySelectorAll(".seat")];
+
+        chips.forEach(chip => {
+            const label = chip.textContent.trim() || "a chip";
+            const box = chip.getBoundingClientRect();
+            seats.forEach((seat, index) => {
+                // Its own puck is the one thing it is allowed to touch: on a narrow felt
+                // the chip clings to the seat rather than taking a ring of its own.
+                if (seat.contains(chip)) return;
+                if (overlap(box, seat.getBoundingClientRect())) {
+                    offenders.push(`chip ${label} is behind seat ${index + 1}`);
+                }
+            });
+            // A chip wider than the puck it is clinging to is on its neighbours by
+            // construction, whatever the ring does.
+            const host = chip.closest(".seat");
+            if (host && chip.classList.contains("betChipAnchored")) {
+                const puck = host.getBoundingClientRect();
+                if (box.width > puck.width + 0.5) {
+                    offenders.push(`chip ${label} is ${Math.round(box.width - puck.width)}px ` +
+                        `wider than its own puck`);
+                }
+            }
+        });
+
+        for (let a = 0; a < chips.length; a++) {
+            for (let b = a + 1; b < chips.length; b++) {
+                if (overlap(chips[a].getBoundingClientRect(), chips[b].getBoundingClientRect())) {
+                    offenders.push(`chip ${chips[a].textContent.trim()} and chip ` +
+                        `${chips[b].textContent.trim()} are on top of each other`);
+                }
+            }
+        }
+
+        return { name, offenders: [...new Set(offenders)] };
+    },
+
     // ---- Runner ----
 
+    // Every check this file knows how to make, every time.
+    //
+    // Two of them used not to be here. Contrast was simply missing from the list, and
+    // touch targets sat behind an opt-in flag nobody passed — so "the audit is clean"
+    // has meant nine checks rather than eleven, and the two left out are the two whose
+    // faults a dealer meets in a dim room with their thumb. Both were written, tested
+    // and then never run: the contrast checker was built across two rounds and every
+    // sweep since has been silent about colour.
+    //
+    // A check that decides it can't apply here says so out loud rather than reporting
+    // an empty offenders list, which reads as a pass. touchTargets stands itself down
+    // on a mouse-driven browser — that is right, a 24px control is fine with a cursor
+    // on it — but "not measured" and "measured and fine" are different answers and the
+    // runner now prints which one it got.
+    // The table has to be big enough for the game around it.
+    //
+    // The seat ring sat at a flat 44% by 42% of the seat layer at every size — two
+    // numbers picked against a phone. A fixed pair can only be right for one ratio of
+    // puck to felt, and measured on the running page it was wrong nearly everywhere:
+    // at 1280x900 nine-handed, five of nine pucks finished past the outer edge of the
+    // table, the worst by 49px; on a phone held sideways all six did. Seats floating
+    // off the felt onto the page read as the table being too small for the game rather
+    // than as players at a rail — and it was a different amount of wrong on every
+    // screen, which is what made it look like a mistake instead of a choice.
+    //
+    // Checked against the table's outer edge, border included: sitting *on* the rail is
+    // fine, hanging off the far side of it is not. The bet chips are held to the same
+    // rule — a chip is meant to be on the felt between its player and the pot.
+    seatsOnTheTable(slackPx = 1) {
+        const name = "seats and chips stay on the table";
+        if (this.modalScope()) {
+            return { name, offenders: [], skipped: "a sheet is open over the table" };
+        }
+        const table = document.getElementById("pokerTable");
+        if (!table) return { name, offenders: [], skipped: "no table on this page" };
+
+        const felt = table.getBoundingClientRect();
+        if (!felt.width || !felt.height) return { name, offenders: [], skipped: "table not laid out" };
+
+        const offenders = [];
+        const check = (el, what) => {
+            const r = el.getBoundingClientRect();
+            if (!r.width || !r.height) return;
+            const over = Math.max(
+                felt.left - r.left, r.right - felt.right,
+                felt.top - r.top, r.bottom - felt.bottom);
+            if (over > slackPx) offenders.push(`${what} hangs ${Math.round(over)}px past the rail`);
+        };
+
+        [...document.querySelectorAll(".seat")].forEach((seat, i) => check(seat, `seat ${i + 1}`));
+        [...document.querySelectorAll("#betsLayer > *")].forEach((chip, i) =>
+            check(chip, `bet chip ${i + 1}`));
+
+        return { name, offenders };
+    },
+
+    // An open dialog's buttons have to be on screen without hunting for them.
+    //
+    // The pot wizard — the one dialog in this tool that divides money — had its Confirm
+    // below a scroll at every size: measured with six players and a side pot, 244px off
+    // the bottom on an iPhone 14, 417 on a Galaxy S8, 583 on a phone held sideways, 172
+    // on a desktop. Nothing on screen said there was anything below the list of names,
+    // so the only control that finishes the hand was invisible with the table waiting.
+    //
+    // Checked by hit-testing rather than by geometry alone: a button can be inside the
+    // viewport and still be under something. Only dialogs that are actually open are
+    // considered, and only their buttons — a dialog with no buttons has nothing to find.
+    dialogActionsReachable() {
+        const name = "an open dialog's buttons are on screen";
+        const dialogs = [...document.querySelectorAll("[role='dialog'], [role='alertdialog']")]
+            .filter(d => {
+                const rect = d.getBoundingClientRect();
+                return rect.width > 0 && rect.height > 0 && getComputedStyle(d).visibility !== "hidden";
+            });
+        if (dialogs.length === 0) return { name, offenders: [], skipped: "no dialog is open" };
+
+        const offenders = [];
+        dialogs.forEach(dialog => {
+            const buttons = [...dialog.querySelectorAll("button")].filter(b => {
+                const r = b.getBoundingClientRect();
+                return r.width > 0 && r.height > 0;
+            });
+            buttons.forEach(button => {
+                const r = button.getBoundingClientRect();
+                const label = this.describe(button);
+                if (r.bottom > innerHeight || r.top < 0) {
+                    const off = r.bottom > innerHeight
+                        ? Math.round(r.bottom - innerHeight) + "px below the fold"
+                        : Math.round(-r.top) + "px above it";
+                    offenders.push(`${label} is ${off}`);
+                    return;
+                }
+                const hit = document.elementFromPoint(r.left + r.width / 2, r.top + r.height / 2);
+                if (hit && hit !== button && !button.contains(hit)) {
+                    offenders.push(`${label} is covered by ${this.describe(hit)}`);
+                }
+            });
+        });
+
+        return { name, offenders };
+    },
+
     runAll(options = {}) {
         const checks = [
+            this.seatsOnTheTable(options.seatSlack),
+            this.dialogActionsReachable(),
+            this.controlNames(),
+            this.focusHasRoom(),
+            this.focusablesReachable(),
+            this.furnitureBudget(),
             this.touchAction(),
             this.tapHighlight(),
             this.textSelectable(),
@@ -686,8 +1538,16 @@ const LayoutAudit = {
             this.fieldFontSize(),
             this.seatOwnership(),
             this.oneDealerButton(),
+            this.hiddenButPainted(),
+            this.emptyDecoration(),
+            this.oneNextStep(),
+            this.glancesFitTheirRows(),
+            this.seatLabelsClear(),
+            this.seatsKeepTheirText(),
+            this.chipsKeepTheirAmounts(),
+            this.contrast(options.contrast),
+            this.touchTargets(options.minimumTarget, options.touchTargets),
         ];
-        if (options.includeTouchTargets) checks.push(this.touchTargets(options.minimumTarget));
 
         return {
             viewport: `${innerWidth}x${innerHeight}`,
@@ -695,8 +1555,13 @@ const LayoutAudit = {
             // Things worth knowing that aren't faults — see occlusion() on toasts.
             // Controls a check couldn't probe go here too: not a fault, but not a pass
             // either, and a silent skip is how faults hide.
-            warnings: checks.flatMap(c => [...(c.warnings || []), ...(c.unmeasured || [])]),
-            passed: checks.filter(c => c.offenders.length === 0).map(c => c.name),
+            warnings: checks.flatMap(c => [
+                ...(c.warnings || []),
+                ...(c.unmeasured || []),
+                ...(c.skipped ? [`${c.name}: not run here — ${c.skipped}`] : []),
+            ]),
+            passed: checks.filter(c => !c.skipped && c.offenders.length === 0).map(c => c.name),
+            skipped: checks.filter(c => c.skipped).map(c => c.name),
             clean: checks.every(c => c.offenders.length === 0),
         };
     },

tests/holdem/waitingList.test.js

@@ -0,0 +1,167 @@
+// The people standing behind the chairs.
+//
+// A full home game always has a couple of them, and the list lives on a napkin or in
+// the dealer's head — which is where the argument comes from an hour later about who
+// said they were next. Order of arrival, because it is the only ordering anybody has
+// ever agreed to.
+const test = require("node:test");
+const { describe } = require("node:test");
+const assert = require("node:assert");
+const { HoldemState } = require("./load");
+
+const table = (seated = 2, seats = 4) => {
+    const state = HoldemState.createDefault();
+    HoldemState.resizeSeats(state, seats);
+    ["Ann", "Ben", "Cal", "Dee"].slice(0, seated).forEach((name, i) => {
+        state.seats[i].name = name;
+        state.seats[i].stack = 200;
+        state.seats[i].buyIns = 200;
+    });
+    return state;
+};
+
+describe("keeping the list", () => {
+    test("names go on in the order they arrive", () => {
+        const state = table();
+        HoldemState.addToWaitingList(state, "Priya");
+        HoldemState.addToWaitingList(state, "Sam");
+        assert.deepEqual(state.waitingList.map(row => row.name), ["Priya", "Sam"]);
+    });
+
+    test("whitespace is trimmed and nothing empty gets on", () => {
+        const state = table();
+        assert.ok(HoldemState.addToWaitingList(state, "  Priya  "));
+        assert.equal(HoldemState.addToWaitingList(state, "   "), null);
+        assert.equal(HoldemState.addToWaitingList(state, ""), null);
+        assert.deepEqual(state.waitingList.map(row => row.name), ["Priya"]);
+    });
+
+    test("two people with the same name are two people", () => {
+        // Home games have two Mikes. The list is keyed by id, not by name.
+        const state = table();
+        HoldemState.addToWaitingList(state, "Mike");
+        HoldemState.addToWaitingList(state, "Mike");
+        assert.equal(state.waitingList.length, 2);
+        assert.notEqual(state.waitingList[0].id, state.waitingList[1].id);
+
+        HoldemState.removeFromWaitingList(state, state.waitingList[0].id);
+        assert.equal(state.waitingList.length, 1, "only one of them leaves");
+    });
+
+    test("taking somebody off gives them back, so the toast can name them", () => {
+        const state = table();
+        HoldemState.addToWaitingList(state, "Priya");
+        const gone = HoldemState.removeFromWaitingList(state, state.waitingList[0].id);
+        assert.equal(gone.name, "Priya");
+        assert.deepEqual(state.waitingList, []);
+        assert.equal(HoldemState.removeFromWaitingList(state, "not-a-real-id"), null);
+    });
+});
+
+describe("which chairs are open", () => {
+    test("the ones with nobody in them, in seat order", () => {
+        assert.deepEqual(HoldemState.openSeats(table(2, 4)), [2, 3]);
+        assert.deepEqual(HoldemState.openSeats(table(4, 4)), []);
+    });
+
+    test("a chair with chips or a buy-in on it is not open", () => {
+        // Somebody who has stepped away from the table still owns their seat.
+        const state = table(2, 4);
+        state.seats[2].stack = 120;
+        state.seats[3].buyIns = 100;
+        assert.deepEqual(HoldemState.openSeats(state), []);
+    });
+});
+
+describe("sitting somebody down", () => {
+    test("their name goes on the chair and they come off the list", () => {
+        const state = table();
+        HoldemState.addToWaitingList(state, "Priya");
+        HoldemState.addToWaitingList(state, "Sam");
+        const result = HoldemState.seatFromWaitingList(state, state.waitingList[0].id, 2);
+
+        assert.equal(result.ok, true);
+        assert.equal(state.seats[2].name, "Priya");
+        assert.deepEqual(state.waitingList.map(row => row.name), ["Sam"]);
+    });
+
+    test("with nothing in front of them, because they haven't bought in yet", () => {
+        // Guessing a stack would put chips on the table nobody has paid for, which is
+        // the one thing the bank check exists to catch.
+        const state = table();
+        HoldemState.addToWaitingList(state, "Priya");
+        HoldemState.seatFromWaitingList(state, state.waitingList[0].id, 2);
+
+        assert.equal(state.seats[2].stack, null);
+        assert.equal(state.seats[2].buyIns, 0);
+        assert.equal(state.seats[2].inHand, false, "they're in the next hand, not this one");
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+    });
+
+    test("never into a chair somebody is already in", () => {
+        const state = table();
+        HoldemState.addToWaitingList(state, "Priya");
+        const result = HoldemState.seatFromWaitingList(state, state.waitingList[0].id, 0);
+        assert.equal(result.ok, false);
+        assert.match(result.reason, /Ann is already/);
+        assert.equal(state.waitingList.length, 1, "and they keep their place in the queue");
+    });
+
+    test("nor from a name that has already been seated", () => {
+        const state = table();
+        HoldemState.addToWaitingList(state, "Priya");
+        const id = state.waitingList[0].id;
+        HoldemState.seatFromWaitingList(state, id, 2);
+        const again = HoldemState.seatFromWaitingList(state, id, 3);
+        assert.equal(again.ok, false);
+        assert.equal(state.seats[3].name, "", "the second chair is untouched");
+    });
+
+    test("a seat that doesn't exist is refused rather than invented", () => {
+        const state = table();
+        HoldemState.addToWaitingList(state, "Priya");
+        assert.equal(HoldemState.seatFromWaitingList(state, state.waitingList[0].id, 99).ok, false);
+        assert.equal(state.waitingList.length, 1);
+    });
+});
+
+describe("a seat opening up", () => {
+    test("cashing somebody out is what makes room for the next one", () => {
+        const state = table(4, 4);
+        HoldemState.addToWaitingList(state, "Priya");
+        assert.deepEqual(HoldemState.openSeats(state), [], "the table is full");
+
+        HoldemState.cashOut(state, 1);
+        assert.deepEqual(HoldemState.openSeats(state), [1]);
+
+        const seated = HoldemState.seatFromWaitingList(state, state.waitingList[0].id, 1);
+        assert.equal(seated.ok, true);
+        assert.equal(state.seats[1].name, "Priya");
+        // Ben's night is still on the record, and the money still adds up.
+        assert.equal(state.cashedOut.length, 1);
+        assert.equal(HoldemState.bankReconciliation(state).balanced, true);
+    });
+});
+
+describe("what a saved table remembers", () => {
+    test("the list survives a reload", () => {
+        const state = table();
+        HoldemState.addToWaitingList(state, "Priya");
+        const migrated = HoldemState.migrate(JSON.parse(JSON.stringify(state)));
+        assert.deepEqual(migrated.waitingList.map(row => row.name), ["Priya"]);
+    });
+
+    test("a table saved before the list existed has nobody waiting", () => {
+        const parsed = JSON.parse(JSON.stringify(table()));
+        delete parsed.waitingList;
+        assert.deepEqual(HoldemState.migrate(parsed).waitingList, []);
+    });
+
+    test("junk in a saved list is cleaned up rather than trusted", () => {
+        const parsed = JSON.parse(JSON.stringify(table()));
+        parsed.waitingList = [{ name: "  Priya  " }, { name: "" }, null, "Sam"];
+        const migrated = HoldemState.migrate(parsed);
+        assert.deepEqual(migrated.waitingList.map(row => row.name), ["Priya", "Sam"]);
+        assert.ok(migrated.waitingList.every(row => row.id), "and everybody gets an id");
+    });
+});

tests/holdem/wakeLock.test.js

@@ -0,0 +1,276 @@
+// When the tool asks the phone to stay awake, and — the part that actually matters —
+// when it lets go again.
+//
+// A dealer's phone lies face-up on the felt all night. Left alone it dims and locks
+// between the flop and the turn, every hand, and a dozen rounds of making the next step
+// readable at a glance count for nothing behind a lock screen.
+//
+// The risk runs the other way too, and it is the one worth testing. A wake lock that is
+// taken and not dropped is a phone that burns its battery through a break, a re-buy, and
+// the twenty minutes everyone spends arguing about pizza — and the dealer has no way to
+// tell that is what is happening. So the rule is narrow: held only while betting is
+// actually open, and only while the dealer wants it.
+//
+// The browser side of this is a stand-in below rather than a real navigator, which lets
+// the tests ask the questions a real table asks: what happens when the hand ends inside
+// the request, what happens when the phone takes the lock back on its own, and what
+// happens when the browser simply says no.
+const test = require("node:test");
+const { describe, beforeEach, afterEach } = require("node:test");
+const assert = require("node:assert");
+const { WakeLock, HoldemState, makeTable } = require("./load");
+
+// A stand-in for navigator.wakeLock that records what was asked of it. `deny` makes
+// every request reject, the way a phone in battery saver does.
+const fakeWakeLock = ({ deny = false } = {}) => {
+    const api = {
+        requests: 0,
+        released: 0,
+        live: [],
+        deny,
+        wakeLock: {
+            request: async () => {
+                api.requests += 1;
+                if (api.deny) throw new Error("denied");
+                const listeners = [];
+                const sentinel = {
+                    released: false,
+                    addEventListener: (name, fn) => { if (name === "release") listeners.push(fn); },
+                    release: async () => {
+                        if (sentinel.released) return;
+                        sentinel.released = true;
+                        api.released += 1;
+                        listeners.forEach(fn => fn());
+                    },
+                    // What the browser does on its own when the tab stops being visible.
+                    dropFromOutside: () => {
+                        sentinel.released = true;
+                        listeners.forEach(fn => fn());
+                    },
+                };
+                api.live.push(sentinel);
+                return sentinel;
+            },
+        },
+    };
+    return api;
+};
+
+// Settles the promises `sync()` deliberately doesn't return — it is called from
+// renderAll, which is synchronous, so the acquiring happens off to one side.
+const settle = () => new Promise(resolve => setImmediate(resolve));
+
+// Node has had its own `globalThis.navigator` since v21, defined as a getter — so a
+// plain assignment to it does nothing at all and throws nothing either. Every test in
+// here that thought it had installed a fake would have been quietly measuring Node's
+// real navigator, which has no wakeLock, and passing for the wrong reason.
+const setNavigator = value => {
+    Object.defineProperty(globalThis, "navigator", {
+        value, configurable: true, writable: true,
+    });
+};
+
+let realNavigator;
+
+beforeEach(() => {
+    realNavigator = globalThis.navigator;
+    WakeLock.sentinel = null;
+    WakeLock.wanted = false;
+    WakeLock.pending = false;
+    WakeLock.told = true; // The toast is DOM; it is checked in the browser.
+    WakeLock.hooks = null;
+});
+
+afterEach(() => {
+    setNavigator(realNavigator);
+});
+
+const useFake = api => {
+    setNavigator(api);
+    return api;
+};
+
+// A table mid-hand, which is the only state that wants the screen.
+const dealtIn = () => {
+    const state = makeTable({ seatCount: 4, stack: 200 });
+    state.bettingOpen = true;
+    return state;
+};
+
+describe("the rule about when a table needs the screen", () => {
+    test("a hand in progress does", () => {
+        assert.equal(WakeLock.shouldHold(dealtIn()), true);
+    });
+
+    test("a table between hands does not", () => {
+        const state = dealtIn();
+        state.bettingOpen = false;
+        assert.equal(WakeLock.shouldHold(state), false);
+    });
+
+    test("a dealer who turned it off does not, mid-hand or otherwise", () => {
+        const state = dealtIn();
+        state.keepScreenAwake = false;
+        assert.equal(WakeLock.shouldHold(state), false);
+    });
+
+    test("no table at all does not", () => {
+        assert.equal(WakeLock.shouldHold(null), false);
+        assert.equal(WakeLock.shouldHold(undefined), false);
+    });
+
+    test("a table that has never heard of the setting still does", () => {
+        // Every saved table from before this existed. The migration fills it in, but the
+        // rule itself has to read a missing value as yes or the first hand after an
+        // update runs without it.
+        const state = dealtIn();
+        delete state.keepScreenAwake;
+        assert.equal(WakeLock.shouldHold(state), true);
+    });
+});
+
+describe("taking the lock and giving it back", () => {
+    test("a hand starting takes one", async () => {
+        const api = useFake(fakeWakeLock());
+        WakeLock.sync(dealtIn());
+        await settle();
+        assert.equal(api.requests, 1);
+        assert.ok(WakeLock.sentinel);
+    });
+
+    test("the hand ending gives it back", async () => {
+        const api = useFake(fakeWakeLock());
+        const state = dealtIn();
+        WakeLock.sync(state);
+        await settle();
+
+        state.bettingOpen = false;
+        WakeLock.sync(state);
+        await settle();
+
+        assert.equal(api.released, 1);
+        assert.equal(WakeLock.sentinel, null);
+    });
+
+    test("turning the setting off mid-hand gives it back", async () => {
+        const api = useFake(fakeWakeLock());
+        const state = dealtIn();
+        WakeLock.sync(state);
+        await settle();
+
+        state.keepScreenAwake = false;
+        WakeLock.sync(state);
+        await settle();
+
+        assert.equal(api.released, 1);
+    });
+
+    test("a whole street of renders takes exactly one", async () => {
+        // sync() runs off renderAll, which fires many times a second while a street is
+        // being bet. Every one of those must be a no-op, or the tool leaks a sentinel
+        // per render and the screen stays lit long after the hand is over.
+        const api = useFake(fakeWakeLock());
+        const state = dealtIn();
+        for (let i = 0; i < 20; i += 1) {
+            WakeLock.sync(state);
+            await settle();
+        }
+        assert.equal(api.requests, 1);
+        assert.equal(api.released, 0);
+    });
+
+    test("two syncs in the same tick still take exactly one", async () => {
+        // The `pending` guard. Without it both calls get past the "already holding one?"
+        // check, and the second sentinel is never stored — so nothing can release it and
+        // the screen stays awake for the rest of the night.
+        const api = useFake(fakeWakeLock());
+        const state = dealtIn();
+        WakeLock.sync(state);
+        WakeLock.sync(state);
+        await settle();
+        await settle();
+        assert.equal(api.requests, 1);
+    });
+});
+
+describe("the awkward moments", () => {
+    test("a hand that ends while the request is in flight leaves nothing held", async () => {
+        // A fold can end the hand between asking for the lock and being given it. The
+        // sentinel that arrives afterwards belongs to a hand that no longer exists.
+        const api = useFake(fakeWakeLock());
+        const state = dealtIn();
+        WakeLock.sync(state);
+
+        state.bettingOpen = false;
+        WakeLock.sync(state);
+
+        await settle();
+        await settle();
+
+        assert.equal(WakeLock.sentinel, null, "nothing should still be held");
+        assert.equal(api.released, 1, "the one that arrived late should have been let go");
+    });
+
+    test("the browser taking it back leaves us able to take it again", async () => {
+        // What happens every time the dealer switches apps to check a rule. The browser
+        // releases the lock itself and never gives it back; if we go on believing we
+        // hold one, the screen sleeps for the rest of the night.
+        const api = useFake(fakeWakeLock());
+        const state = dealtIn();
+        WakeLock.sync(state);
+        await settle();
+
+        api.live[0].dropFromOutside();
+        assert.equal(WakeLock.sentinel, null, "the release listener should have cleared it");
+
+        WakeLock.sync(state);
+        await settle();
+        assert.equal(api.requests, 2, "coming back to the tool should take a fresh one");
+    });
+
+    test("a browser that says no is not an error", async () => {
+        const api = useFake(fakeWakeLock({ deny: true }));
+        const state = dealtIn();
+        await assert.doesNotReject(async () => {
+            WakeLock.sync(state);
+            await settle();
+        });
+        assert.equal(api.requests, 1);
+        assert.equal(WakeLock.sentinel, null);
+    });
+
+    test("a browser without the API is left alone entirely", async () => {
+        useFake({});
+        assert.equal(WakeLock.supported(), false);
+        const state = dealtIn();
+        await assert.doesNotReject(async () => {
+            WakeLock.sync(state);
+            await settle();
+        });
+        assert.equal(WakeLock.wanted, false);
+    });
+});
+
+describe("what a saved table remembers about the screen", () => {
+    test("a new table keeps the screen on", () => {
+        assert.equal(HoldemState.createDefault().keepScreenAwake, true);
+    });
+
+    test("a table saved before the setting existed keeps the screen on", () => {
+        const saved = HoldemState.createDefault();
+        delete saved.keepScreenAwake;
+        assert.equal(HoldemState.migrate(saved).keepScreenAwake, true);
+    });
+
+    test("a dealer who turned it off still has it off after a reload", () => {
+        const saved = HoldemState.createDefault();
+        saved.keepScreenAwake = false;
+        assert.equal(HoldemState.migrate(saved).keepScreenAwake, false);
+    });
+
+    test("junk in that field is read as on rather than trusted", () => {
+        const saved = HoldemState.createDefault();
+        saved.keepScreenAwake = "yes please";
+        assert.equal(HoldemState.migrate(saved).keepScreenAwake, true);
+    });
+});