Replace the browser confirm boxes with undo and in-page dialogs

Three system confirm() dialogs sat in the middle of dealing. The worst was on
Next Hand — the most-pressed button in a session, asking "are you sure?" every
single time, stealing focus and, on a phone, taking over the screen.

Next Hand now just happens, and a toast says where the button landed with an
Undo beside it for the few seconds anyone would notice a misclick. The same
undo covers the pot wizard, which is the more valuable case: paying the wrong
player is a real mistake, and rolling it back restores the hand history entry
and the session standings along with the seats. The snapshot is in-memory only
— an undo is for the mistake you just made, not one from last night.

The two genuinely destructive actions keep a confirmation, but as an in-page
dialog that matches the table instead of the browser's own: Escape or the
backdrop cancels, Enter confirms, and on a phone the buttons go full width with
Cancel nearest the thumb.

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

JoshHeaps.Net/wwwroot/css/casino/holdem.css

@@ -753,6 +753,135 @@ body {
 
 /* ---------- Pot wizard ---------- */
 
+/* ---------- Toasts ---------- */
+
+#toastHost {
+    position: fixed;
+    left: 50%;
+    bottom: 1.25rem;
+    transform: translateX(-50%);
+    z-index: 80;
+    width: min(560px, calc(100vw - 1.5rem));
+    pointer-events: none;
+}
+
+.toast {
+    display: flex;
+    align-items: center;
+    gap: 0.75rem;
+    background: linear-gradient(180deg, #2b2b2b, #202020);
+    border: 1px solid #414141;
+    border-left: 3px solid #d8b46a;
+    border-radius: 10px;
+    padding: 0.7rem 0.8rem 0.7rem 0.9rem;
+    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.55);
+    pointer-events: auto;
+    opacity: 0;
+    transform: translateY(12px);
+    transition: opacity 0.18s ease, transform 0.18s ease;
+}
+
+.toast.toastVisible {
+    opacity: 1;
+    transform: translateY(0);
+}
+
+.toastText {
+    flex: 1;
+    min-width: 0;
+    color: #e9e9e9;
+    font-size: 0.85rem;
+    line-height: 1.35;
+}
+
+.toastAction {
+    flex: none;
+    min-height: 38px;
+    padding: 0.35rem 0.9rem;
+    border-radius: 8px;
+    border: 1px solid #d8b46a;
+    background: rgba(216, 180, 106, 0.12);
+    color: #f0d9a8;
+    font-size: 0.85rem;
+    font-weight: 600;
+    font-family: inherit;
+    cursor: pointer;
+}
+
+.toastAction:hover {
+    background: rgba(216, 180, 106, 0.22);
+}
+
+.toastClose {
+    flex: none;
+    width: 30px;
+    height: 30px;
+    border-radius: 50%;
+    border: none;
+    background: transparent;
+    color: #888;
+    font-size: 0.8rem;
+    font-family: inherit;
+    cursor: pointer;
+}
+
+.toastClose:hover {
+    background: #333;
+    color: #ddd;
+}
+
+/* ---------- Confirmation dialog ---------- */
+
+#confirmOverlay {
+    position: fixed;
+    inset: 0;
+    background: rgba(0, 0, 0, 0.72);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 90;
+    padding: 1.5rem;
+}
+
+#confirmOverlay[hidden] {
+    display: none;
+}
+
+#confirmModal {
+    background: #1e1e1e;
+    border: 1px solid #3a3a3a;
+    border-radius: 12px;
+    width: 100%;
+    max-width: 420px;
+    padding: 1.3rem 1.4rem 1.2rem;
+    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
+    outline: none;
+}
+
+#confirmTitle {
+    margin: 0 0 0.5rem;
+    font-size: 1.05rem;
+    font-weight: 500;
+    color: #f5f5f5;
+}
+
+#confirmMessage {
+    margin: 0 0 1.2rem;
+    color: #a5a5a5;
+    font-size: 0.85rem;
+    line-height: 1.5;
+}
+
+.confirmActions {
+    display: flex;
+    justify-content: flex-end;
+    gap: 0.6rem;
+}
+
+.confirmActions .holdemBtn {
+    min-height: 44px;
+}
+
 #potWizardOverlay {
     position: fixed;
     inset: 0;
@@ -1053,4 +1182,17 @@ body {
         min-height: 44px;
         margin-top: 0.4rem;
     }
+
+    .toastAction {
+        min-height: 44px;
+    }
+
+    .confirmActions {
+        flex-direction: column-reverse;
+    }
+
+    .confirmActions .holdemBtn {
+        width: 100%;
+        justify-content: center;
+    }
 }