Fix mobile bottom nav consistency and ticket view width

Mobile bottom nav:
- Added nav-label class to all text labels in JS
- Fixed icon sizing (20px fixed height)
- Fixed label sizing (10px for all)
- Equal width columns (25% each)
- Changed gear emoji from ⚙️ to ⚙ for consistency

Ticket view mobile:
- Removed all borders from ticket container
- Removed decorative corners on mobile
- Reduced nested padding significantly
- ascii-frame-inner now 0.75rem padding (was 1rem)
- Nested ascii-frame-inner only 0.5rem
- detail-group full-width has no padding
- Content goes edge-to-edge

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

assets/css/dashboard.css

@@ -5700,7 +5700,7 @@ table td:nth-child(4) {
         bottom: 0;
         left: 0;
         right: 0;
-        height: 64px;
+        height: 60px;
         background: var(--bg-primary);
         border-top: 2px solid var(--terminal-green);
         z-index: var(--z-dropdown);
@@ -5709,29 +5709,34 @@ table td:nth-child(4) {
 
     .mobile-bottom-nav a,
     .mobile-bottom-nav button {
-        flex: 1;
+        flex: 1 1 25%;
+        max-width: 25%;
         display: flex;
         flex-direction: column;
         align-items: center;
         justify-content: center;
-        gap: 0.15rem;
+        gap: 4px;
         background: transparent;
         border: none;
         color: var(--terminal-green);
         text-decoration: none;
-        font-size: 0.7rem;
         font-family: var(--font-mono);
-        padding: 0.5rem 0.25rem;
-        min-height: 64px;
+        padding: 8px 4px;
+        min-height: 60px;
     }
 
     .mobile-bottom-nav .nav-icon {
-        font-size: 1.1rem;
+        font-size: 20px;
         line-height: 1;
+        height: 24px;
+        display: flex;
+        align-items: center;
+        justify-content: center;
     }
 
-    .mobile-bottom-nav .nav-label {
-        font-size: 0.7rem;
+    .mobile-bottom-nav .nav-label,
+    .mobile-bottom-nav span:not(.nav-icon) {
+        font-size: 10px;
         line-height: 1;
         text-transform: uppercase;
         letter-spacing: 0.5px;