fix: toast crash, notification dropdown, ticket detail editable, toolbar dropdowns

- Fix duplicate function showToast declaration causing infinite recursion
  (showToast declared twice → function hoisting → _origShowToast === self)
  Progress bar now inlined directly into _displayToast; Module 47 removed
- Notification bell now opens a proper dropdown panel with unread items,
  per-item click-to-read, "Mark all read", close on outside click/Esc
- Ticket detail drawer now has real editable fields (title, status,
  priority, assignee, description textarea, comment box) instead of
  read-only KV pairs; Save Changes and Post Comment buttons functional
- Advanced ▾ filter dropdown: status/priority/assignee selects + Apply/Reset
- Bulk Actions dropdown: Close/Reassign/Export/Delete with toast feedback
- Generic .lt-dropdown-trigger toggle system (works for any future dropdown)
- Add CSS sections 76 (notification panel) and 77 (dropdown widget + .lt-textarea)

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

base.js

@@ -105,9 +105,14 @@
     closeEl.setAttribute('aria-label', 'Dismiss');
     closeEl.addEventListener('click', () => _dismissToast(toast));
 
+    const progressEl = document.createElement('div');
+    progressEl.className = 'lt-toast-progress';
+    progressEl.style.animationDuration = duration + 'ms';
+
     toast.appendChild(iconEl);
     toast.appendChild(msgEl);
     toast.appendChild(closeEl);
+    toast.appendChild(progressEl);
     container.appendChild(toast);
 
     const timer = setTimeout(() => _dismissToast(toast), duration);
@@ -2027,32 +2032,6 @@
     },
   };
 
-  /* ================================================================
-     MODULE 47 — TOAST ENHANCEMENTS
-     Adds a drain progress bar to each toast.
-     The original showToast already handles queuing (section 2).
-     ================================================================ */
-  // Patch showToast to inject a progress bar after each toast is created
-  const _origShowToast = showToast;
-  function showToast(message, type, duration) {
-    duration = duration || 4000;
-    const result = _origShowToast(message, type, duration);
-    // Inject drain bar into the most recently added toast
-    requestAnimationFrame(() => {
-      const container = document.getElementById('lt-toast-container');
-      if (!container) return;
-      const toasts = container.querySelectorAll('.lt-toast');
-      const last = toasts[toasts.length - 1];
-      if (last && !last.querySelector('.lt-toast-progress')) {
-        const bar = document.createElement('div');
-        bar.className = 'lt-toast-progress';
-        bar.style.animationDuration = duration + 'ms';
-        last.appendChild(bar);
-      }
-    });
-    return result;
-  }
-
   /* ================================================================
      MODULE 48 — SIDEBAR SUBMENUS
      Auto-inits .lt-sidebar-group elements.