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/ticket.css

@@ -2258,27 +2258,55 @@ body.dark-mode .editable {
         align-items: center;
     }
 
-    /* Ticket container - full width on mobile */
+    /* Ticket container - full width on mobile, minimal borders */
     .ticket-container {
         width: 100%;
         margin: 0;
-        border-width: 2px;
-        border-left: none;
-        border-right: none;
+        border: none;
+        padding: 0;
+    }
+
+    .ticket-container.ascii-frame-outer {
+        border: none;
+        padding: 0;
+    }
+
+    /* Remove all decorative corners on mobile */
+    .ticket-container::before,
+    .ticket-container::after,
+    .ticket-container .bottom-left-corner,
+    .ticket-container .bottom-right-corner {
+        display: none;
     }
 
     .ascii-section-header {
         font-size: 1rem;
-        padding: 0.75rem 1rem;
+        padding: 0.75rem 0.75rem;
+        margin: 0;
+        border-bottom: 2px solid var(--terminal-green);
     }
 
+    /* Remove all nested padding - go edge to edge */
     .ascii-content {
         padding: 0;
     }
 
     .ascii-frame-inner {
-        padding: 1rem;
+        padding: 0.75rem;
         border: none;
+        margin: 0;
+    }
+
+    /* Nested ascii-frame-inner should have no extra padding */
+    .ascii-frame-inner .ascii-frame-inner {
+        padding: 0.5rem;
+    }
+
+    /* Detail group full width */
+    .detail-group.full-width {
+        padding: 0;
+        margin: 0;
+        width: 100%;
     }
 
     /* Better ticket header layout */