feat: rich command templates with public links + media text-first flow

- Command templates now match notification template style: type icons,
  linked filenames via album shared links, location, favorite status
- Media mode sends text message first, then media as reply (was media-only)
- Search/find/person/place resolve asset public URLs from tracked albums'
  shared links (share/{key}/photos/{id})
- Albums/summary commands include album public_url in context
- Enriched command template preview sample context with public_url, city,
  country, is_favorite
- Extract sanitizePreview to shared lib/sanitize.ts
- Command template preview now renders HTML links (was raw text)
- Global provider filter moved above search in sidebar
- CLAUDE.md: template consistency + context variable sync rules

packages/server/src/notify_bridge_server/api/command_template_configs.py

@@ -343,8 +343,8 @@ async def preview_raw(
         ],
         # /albums, /summary
         "albums": [
-            {"name": "Family Photos", "asset_count": 142, "id": "abc-123"},
-            {"name": "Vacation 2025", "asset_count": 87, "id": "def-456"},
+            {"name": "Family Photos", "asset_count": 142, "id": "abc-123", "public_url": "https://immich.example.com/share/abc123"},
+            {"name": "Vacation 2025", "asset_count": 87, "id": "def-456", "public_url": ""},
         ],
         # /events
         "events": [
@@ -355,8 +355,8 @@ async def preview_raw(
         "people": ["Alice", "Bob", "Charlie"],
         # /search, /find, /person, /place, /latest, /favorites, /random, /memory
         "assets": [
-            {"id": "a1", "originalFileName": "IMG_001.jpg", "type": "IMAGE", "createdAt": "2026-03-19T14:30:00", "year": 2024},
-            {"id": "a2", "originalFileName": "VID_002.mp4", "type": "VIDEO", "createdAt": "2026-03-19T15:00:00", "year": 2023},
+            {"id": "a1", "originalFileName": "IMG_001.jpg", "type": "IMAGE", "createdAt": "2026-03-19T14:30:00", "year": 2024, "public_url": "https://immich.example.com/share/abc123/photos/a1", "city": "Paris", "country": "France", "is_favorite": True},
+            {"id": "a2", "originalFileName": "VID_002.mp4", "type": "VIDEO", "createdAt": "2026-03-19T15:00:00", "year": 2023, "public_url": "", "city": "", "country": "", "is_favorite": False},
         ],
         "query": "sunset",
         "command": "search",