feat: Immich photo integration — Photos addon with sharing, filters, lightbox

- Immich connection per user (Settings → Immich URL + API Key)
- Photos addon (admin-toggleable, trip tab)
- Manual photo selection from Immich library (date filter + all photos)
- Photo sharing with consent popup, per-photo privacy toggle
- Lightbox with liquid glass EXIF info panel (camera, lens, location, settings)
- Location filter + date sort in gallery
- WebSocket live sync when photos are added/removed/shared
- Proxy endpoints for thumbnails and originals with token auth

server/src/index.ts

@@ -152,6 +152,8 @@ import vacayRoutes from './routes/vacay';
 app.use('/api/addons/vacay', vacayRoutes);
 import atlasRoutes from './routes/atlas';
 app.use('/api/addons/atlas', atlasRoutes);
+import immichRoutes from './routes/immich';
+app.use('/api/integrations/immich', immichRoutes);
 
 app.use('/api/maps', mapsRoutes);
 app.use('/api/weather', weatherRoutes);