T3: Search & Filter UX improvements

- Add missing assetCountBar div with count bar styling
- Add missing clearFiltersBtn with show/hide logic
- Add .search-highlight CSS for matching term highlighting
- Add .ai-location CSS for location context in asset items
- Add loading spinner overlay during search debounce
- Fix filter pills to use JS string escaping (not HTML escaping)
- Add 'make' filter parameter to API query
- Include 'make' in filter detection for count bar

static/index.html

@@ -3352,6 +3352,15 @@
       ).join('');
     }
 
+    function initKeyBadges() {
+      loadBadgeChecklist();
+      // Add a default key entry if the list is empty
+      const list = document.getElementById('manKeysList');
+      if (list && list.children.length === 0) {
+        addKeyEntry();
+      }
+    }
+
     function toggleBadge(el) {
       el.classList.toggle('checked');
       el.querySelector('input').checked = el.classList.contains('checked');