XL landscape polish: btn-primary sizing, tray from right, footer bg, layout fixes

- .btn-xl removed; .btn-primary absorbs 4rem sizing (same as PICK SIGS/PICK ROLES)
- Landscape navbar .btn-primary: 3rem → 4rem to match base; XL stays 4rem (consistent)
- _button-pad.scss XL: base .btn ×1.2 (2.4rem); .btn-xl block deleted
- _tray.scss XL (≥1800px): portrait-style tray (slides from right, z-95)
- tray.js: _isLandscape() returns false at ≥1800px; portrait code paths run throughout
- Footer sidebar: background-color added so opaque footer masks tray sliding behind it
- Copyright .footer-container: bottom → top in landscape sidebar
- #id_room_menu: right: 2.5rem override in _room.scss XL block (cascade fix)
- navbar-text XL: 0.65rem × 1.2 = 0.78rem
- All landscape media queries: max-width: 1440px cutoff removed (already done prior)
- btn-xl class stripped from all 5 templates; test_navbar.py assertion updated

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

src/static_src/scss/_button-pad.scss

@@ -25,6 +25,10 @@
     }
 
     &.btn-primary {
+        width: 4rem;
+        height: 4rem;
+        font-size: 0.875rem;
+        border-width: 0.21rem;
         color: rgba(var(--quaUser), 1);
         border-color: rgba(var(--quaUser), 1);
         background-color: rgba(var(--quiUser), 1);
@@ -34,37 +38,6 @@
             0.25rem 0.25rem 0.25rem rgba(var(--quiUser), 0.12)
         ;
 
-        &:hover {
-            text-shadow:
-                0.1rem 0.1rem 0.1rem rgba(0, 0, 0, 0.25),
-                0 0 1rem rgba(var(--quaUser), 1)
-                ;
-            box-shadow:
-                0.12rem 0.12rem 0.5rem rgba(0, 0, 0, 0.25),
-                0 0 0.5rem rgba(var(--quaUser), 0.12)
-            ;
-        }
-        
-        &:active {
-            border: 0.18rem solid rgba(var(--quaUser), 1);
-            text-shadow:
-                -0.1rem -0.1rem 0.25rem rgba(0, 0, 0, 0.25),
-                0 0 0.12rem rgba(var(--quaUser), 1)
-            ;
-            box-shadow:
-                -0.1rem -0.1rem 0.12rem rgba(var(--quiUser), 0.25),
-                -0.1rem -0.1rem 0.12rem rgba(0, 0, 0, 0.25),
-                0 0 0.5rem rgba(var(--quaUser), 0.12)
-            ;
-        }
-    }
-
-    &.btn-xl {
-        width: 4rem;
-        height: 4rem;
-        font-size: 0.875rem;
-        border-width: 0.21rem;
-
         &:hover {
             text-shadow:
                 0.2rem 0.2rem 0.2rem rgba(0, 0, 0, 0.25),
@@ -72,7 +45,7 @@
                 ;
             box-shadow:
                 0.24rem 0.24rem 0.5rem rgba(0, 0, 0, 0.25),
-                0 0 0.5rem rgba(var(--quaUser), 22)
+                0 0 0.5rem rgba(var(--quaUser), 0.22)
             ;
         }
 
@@ -87,7 +60,7 @@
                 -0.2rem -0.2rem 0.24rem rgba(0, 0, 0, 0.25),
                 0 0 0.5rem rgba(var(--quaUser), 0.22)
             ;
-            }
+        }
     }
 
     &.btn-abandon {
@@ -300,6 +273,12 @@
         }
     }
 
+    @media (orientation: landscape) and (min-width: 1800px) {
+        width: 2.4rem;        // 2rem × 1.2
+        height: 2.4rem;
+        font-size: 0.75rem;   // 0.63rem × 1.2
+    }
+
     &.btn-disabled {
         cursor: default !important;
         font-size: 1.2rem;