Fix: Multiple UI and functionality improvements

Fixed all reported issues:

1. **Dark Mode Improvements:**
   - Fixed bulk-actions-info white on white text (now yellow on dark background)
   - Fixed timeline-content boxes with explicit dark mode colors
   - All text now properly visible in dark mode

2. **Dashboard Enhancement:**
   - Added "Assigned To" column showing ticket assignments
   - Updated TicketModel query to include assigned user information
   - Shows "Unassigned" when no user assigned

3. **Removed Ticket View Tracking:**
   - Removed logTicketView call from TicketController
   - Created migration 011 to delete all view records from audit_log
   - Viewing tickets no longer clutters activity timeline

4. **Removed Duplicate Status Dropdown:**
   - Removed status field from hamburger menu
   - Status can now only be changed via the workflow-validated dropdown in ticket header
   - Prevents confusion and ensures all status changes follow workflow rules

All changes improve usability and reduce clutter.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

assets/css/dashboard.css

@@ -727,11 +727,16 @@ th.sort-desc::after {
 
 /* Dark mode bulk actions */
 body.dark-mode .bulk-actions-toolbar {
-    --toolbar-bg: #3e3400;
+    --toolbar-bg: #1a1a00;
     --toolbar-border: #ffc107;
     --text-primary: #f8f9fa;
 }
 
+body.dark-mode .bulk-actions-info {
+    color: #ffc107;
+    font-weight: bold;
+}
+
 body.dark-mode .btn-bulk {
     --btn-bulk-bg: #0d6efd;
     --btn-bulk-hover: #0b5ed7;