Put one dealer button on the table

A poker table has one dealer button. This one drew nine.

Every seat carried a puck: the real one in gold, and eight ghosts at 0.32 opacity
that existed to be pressed. Measured on a nine-seat table -- eight pale discs, all
eight showing the letter D, one of them the button. Finding it meant comparing nine
identical shapes for the one that's gold, when it should be the only thing of its
kind on the felt.

The ghosts also sat on their neighbours. Every remaining "something important is
covered" offender on a crowded table was a live seat covered by the seat-next-door's
ghost puck: 844x390, 915x412, 360x640 and 640x360 each reported one, and they were
all the same thing.

And a screen reader heard nine buttons named "D".

So a seat without the button doesn't draw one. Hovering a seat fades its slot in --
a preview of where the button would go, one click as before -- and on touch, where
there is no hover, "Give the button" has been in the seat's long-press menu all
along. Keyboard reaches it by focus, where the slot appears too.

pointer-events matters as much as the opacity: an invisible puck that still took
taps would be worse than a visible one.

  visible pucks    9 -> 1 at every size
  layout offenders 915x412 1->0, 360x640 1->0, 844x390 3->2, 640x360 3->2
  clean viewports  4 of 9 -> 6 of 9
  labels           nine "D" -> "Ann has the dealer button" and
                              "Give the dealer button to Ben"

The audit now checks it, because this is a rule about the table rather than about
CSS: one puck drawn, and no two announcing themselves the same way. Verified against
the old behaviour put back -- it reports 9 and 9.

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

tests/holdem/uiAudit.js

@@ -514,6 +514,34 @@ const LayoutAudit = {
         return { name: "a seat's centre belongs to that seat", offenders };
     },
 
+    // A poker table has one dealer button. Nine pucks all showing "D", one of them
+    // gold, turns the most-read marker on the felt into a spot-the-difference — and
+    // a screen reader heard nine buttons named "D" with nothing to tell them apart.
+    // Both halves are checked here: what's drawn, and what it announces itself as.
+    oneDealerButton() {
+        const chips = [...document.querySelectorAll(".dealerChip")];
+        const shown = chips.filter(chip => {
+            const style = getComputedStyle(chip);
+            return style.display !== "none" && style.visibility !== "hidden" &&
+                parseFloat(style.opacity) > 0.05;
+        });
+        const offenders = [];
+
+        if (shown.length > 1) {
+            offenders.push(`${shown.length} dealer buttons drawn on the felt at once`);
+        }
+
+        const labels = chips.map(chip => chip.getAttribute("aria-label") || chip.textContent.trim());
+        const duplicated = labels.filter((label, i) => labels.indexOf(label) !== i);
+        if (duplicated.length) {
+            offenders.push(
+                `${duplicated.length + 1} dealer buttons announce themselves as "${duplicated[0]}"`
+            );
+        }
+
+        return { name: "the felt shows one dealer button", offenders };
+    },
+
     // ---- Runner ----
 
     runAll(options = {}) {
@@ -527,6 +555,7 @@ const LayoutAudit = {
             this.horizontalOverflow(),
             this.fieldFontSize(),
             this.seatOwnership(),
+            this.oneDealerButton(),
         ];
         if (options.includeTouchTargets) checks.push(this.touchTargets(options.minimumTarget));