z-index audit + aperture fill + resize:end debounce + landscape sig-grid cap

- #id_aperture_fill: position:fixed→absolute (clips to .room-page, avoids h2/navbar);
  z-index 105→90 (below blur backdrops at z-100); landscape override removed (inset:0 works both orientations)
- _base.scss: landscape footer z-index:100 (matches navbar); corrects unset z-index
- _room.scss: fix stale "navbar z-300" comment; landscape sig-deck-grid columns
  repeat(9,1fr)→repeat(9,minmax(0,90px)) to cap card size on wide viewports
- room.js: add resize:end listeners for scaleTable + sizeSigModal; new IIFE dispatches
  resize:end 500ms after resize stops so both functions re-measure settled layout
- tray.js: extract _reposition() from inline resize handler; wire to both resize and
  resize:end so tray repositions correctly after rapid resize or orientation change

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/apps/epic/static/apps/epic/room.js

@@ -18,6 +18,7 @@
         scaleTable();
     }
     window.addEventListener('resize',     scaleTable);
+    window.addEventListener('resize:end', scaleTable);
 }());
 
 (function () {
@@ -85,6 +86,18 @@
 
     window.addEventListener('load',       sizeSigModal);
     window.addEventListener('resize',     sizeSigModal);
+    window.addEventListener('resize:end', sizeSigModal);
+}());
+
+// Dispatch a custom 'resize:end' event 500 ms after the last 'resize' fires.
+// scaleTable, sizeSigModal, and Tray._reposition all subscribe to it so they
+// re-measure with settled viewport dimensions after rapid resize sequences.
+(function () {
+    var t;
+    window.addEventListener('resize', function () {
+        clearTimeout(t);
+        t = setTimeout(function () { window.dispatchEvent(new Event('resize:end')); }, 500);
+    });
 }());
 
 (function () {

src/apps/epic/static/apps/epic/tray.js

@@ -290,6 +290,42 @@ var Tray = (function () {
         }
     }
 
+    // Force-close and reposition to settled bounds.  Called on both 'resize'
+    // (snap without transition to avoid flicker during continuous events) and
+    // 'resize:end' (re-measures after the viewport has stopped moving).
+    function _reposition() {
+        _cancelPendingHide();
+        _open = false;
+        if (_btn) _btn.classList.remove('open');
+        if (_wrap) _wrap.classList.remove('wobble', 'snap', 'tray-dragging');
+
+        if (_isLandscape()) {
+            // Ensure tray is visible before measuring bounds.
+            if (_tray) _tray.style.display = 'grid';
+            if (_wrap) { _wrap.style.left = ''; _wrap.style.bottom = ''; _wrap.style.width = ''; }
+            _computeBounds();
+            _computeCellSize();
+            if (_wrap) {
+                _wrap.classList.add('tray-dragging');
+                _wrap.style.top = _maxTop + 'px';
+                void _wrap.offsetWidth;  // flush reflow so position lands before transition restored
+                _wrap.classList.remove('tray-dragging');
+            }
+        } else {
+            if (_tray) _tray.style.display = 'none';
+            if (_wrap) { _wrap.style.top = ''; _wrap.style.height = ''; }
+            _computeBounds();
+            _applyVerticalBounds();
+            _computeCellSize();
+            if (_wrap) {
+                _wrap.classList.add('tray-dragging');
+                _wrap.style.left = _maxLeft + 'px';
+                void _wrap.offsetWidth;  // flush reflow
+                _wrap.classList.remove('tray-dragging');
+            }
+        }
+    }
+
     function init() {
         _wrap = document.getElementById('id_tray_wrap');
         _btn  = document.getElementById('id_tray_btn');
@@ -403,42 +439,8 @@ var Tray = (function () {
         };
         _btn.addEventListener('click', _onBtnClick);
 
-        window.addEventListener('resize', function () {
-            // Always close on resize: bounds change invalidates current position.
-            // Cancel any in-flight close animation, then force-close state.
-            _cancelPendingHide();
-            _open = false;
-            if (_btn) _btn.classList.remove('open');
-            if (_wrap) _wrap.classList.remove('wobble', 'snap', 'tray-dragging');
-
-            if (_isLandscape()) {
-                // Ensure tray is visible before measuring bounds.
-                if (_tray) _tray.style.display = 'grid';
-                if (_wrap) { _wrap.style.left = ''; _wrap.style.bottom = ''; _wrap.style.width = ''; }
-                _computeBounds();
-                _computeCellSize();
-                // Snap to closed without transition (resize fires continuously).
-                if (_wrap) {
-                    _wrap.classList.add('tray-dragging');
-                    _wrap.style.top = _maxTop + 'px';
-                    void _wrap.offsetWidth;  // flush reflow so position lands before transition restored
-                    _wrap.classList.remove('tray-dragging');
-                }
-            } else {
-                if (_tray) _tray.style.display = 'none';
-                if (_wrap) { _wrap.style.top = ''; _wrap.style.height = ''; }
-                _computeBounds();
-                _applyVerticalBounds();
-                _computeCellSize();
-                // Snap to closed without transition.
-                if (_wrap) {
-                    _wrap.classList.add('tray-dragging');
-                    _wrap.style.left = _maxLeft + 'px';
-                    void _wrap.offsetWidth;  // flush reflow
-                    _wrap.classList.remove('tray-dragging');
-                }
-            }
-        });
+        window.addEventListener('resize', _reposition);
+        window.addEventListener('resize:end', _reposition);
     }
 
     // reset() — restores module state; used by Jasmine afterEach

src/static_src/scss/_base.scss

@@ -326,6 +326,7 @@ body {
         border-left: 0.1rem solid rgba(var(--secUser), 0.3);
         padding: 1rem 0;
         gap: 0;
+        z-index: 100;
 
         #id_footer_nav {
             flex-direction: column-reverse;

src/static_src/scss/_room.scss

@@ -40,6 +40,27 @@ html:has(.gate-backdrop) {
     overflow: hidden;
 }
 
+// Aperture fill — solid --duoUser layer that covers the game table (.room-page).
+// Uses position:absolute so it's clipped to .room-page bounds (overflow:hidden),
+// naturally staying below the h2 title + navbar/footer in both orientations.
+// Sits at z-90: below blur backdrops (z-100) which render on top via backdrop-filter.
+// Fades in/out via opacity transition when a backdrop class is present.
+#id_aperture_fill {
+    position: absolute;
+    inset: 0;
+    background: rgba(var(--duoUser), 1);
+    z-index: 90;
+    pointer-events: none;
+    opacity: 0;
+    transition: opacity 0.15s ease;
+}
+
+html:has(.gate-backdrop) #id_aperture_fill,
+html:has(.sig-backdrop) #id_aperture_fill,
+html:has(.role-select-backdrop) #id_aperture_fill {
+    opacity: 1;
+}
+
 .gate-backdrop {
     position: fixed;
     inset: 0;
@@ -781,8 +802,8 @@ $card-h: 60px;
 // Landscape mobile — aggressively scale down to fit short viewport
 @media (orientation: landscape) and (max-width: 1440px) {
     // Sink navbar below gate/role-select overlays when a modal is open.
-    // Landscape navbar z-index is 300 (_base.scss); gate-backdrop/overlay are
-    // 100/120, so the sidebar bleeds over the modal without this override.
+    // Landscape navbar z-index is 100 (_base.scss); gate-backdrop/overlay are
+    // 100/120 — same level causes paint-order ties so we drop it to 50.
     html:has(.gate-backdrop) body .container .navbar,
     html:has(.role-select-backdrop) body .container .navbar {
         z-index: 50;
@@ -959,7 +980,7 @@ html:has(.sig-backdrop) {
 
 .sig-card {
     aspect-ratio: 5 / 8;
-    border-radius: 3px;
+    border-radius: 0.4rem;
     background: rgba(var(--priUser), 0.97);
     border: 1px solid rgba(var(--secUser), 0.3);
     position: relative;
@@ -1061,7 +1082,7 @@ html:has(.sig-backdrop) {
     .sig-overlay   { padding-left: 4rem; }
     .sig-modal     { max-width: none; }
     .sig-deck-grid {
-        grid-template-columns: repeat(9, 1fr);
+        grid-template-columns: repeat(9, minmax(0, 90px));
         margin: 0;
     }
 }

src/templates/apps/gameboard/room.html

@@ -7,6 +7,7 @@
 {% block content %}
     <div class="room-page" data-room-id="{{ room.id }}"
          {% if room.table_status %}data-select-role-url="{% url 'epic:select_role' room.id %}"{% endif %}>
+        <div id="id_aperture_fill"></div>
         <div class="room-shell">
             <div id="id_game_table" class="room-table">
                 {% if room.table_status == "ROLE_SELECT" %}