feat: fix download-to-user matching, add cover art to downloads

- Fix seriesMap key (use Sonarr internal id, not tvdbId)
- Fix Sonarr tag resolution (use tag map like Radarr)
- Use sourceTitle for history record matching
- Fall back to embedded movie/series objects when API timeouts
- Add includeMovie/includeSeries params to queue/history API calls
- Add coverArt field to all download responses (TMDB poster URLs)
- Add cover art display to frontend download cards
- Fix user-summary route to use instance config and tag maps

.env.example

@@ -1,18 +1,22 @@
 # Server Configuration
 PORT=3001
 
-# SABnzbd Configuration
-SABNZBD_URL=http://localhost:8080
-SABNZBD_API_KEY=your_sabnzbd_api_key
-
-# Sonarr Configuration
-SONARR_URL=http://localhost:8989
-SONARR_API_KEY=your_sonarr_api_key
-
-# Radarr Configuration
-RADARR_URL=http://localhost:7878
-RADARR_API_KEY=your_radarr_api_key
-
-# Emby Configuration
+# Emby Configuration (single instance)
 EMBY_URL=http://localhost:8096
 EMBY_API_KEY=your_emby_api_key
+
+# SABnzbd Instances (JSON array)
+# Format: [{"name": "Instance Name", "url": "http://...", "apiKey": "..."}]
+SABNZBD_INSTANCES=[{"name": "Primary", "url": "http://localhost:8080", "apiKey": "your_api_key"}]
+
+# Sonarr Instances (JSON array)
+SONARR_INSTANCES=[{"name": "Primary", "url": "http://localhost:8989", "apiKey": "your_api_key"}]
+
+# Radarr Instances (JSON array)
+RADARR_INSTANCES=[{"name": "Primary", "url": "http://localhost:7878", "apiKey": "your_api_key"}]
+
+# qBittorrent Instances (JSON array)
+QBITTORRENT_INSTANCES=[
+  {"name": "ransackedcrew", "url": "https://qbittorrent.ransackedcrew.info", "username": "gronod", "password": "K32D&JDjtHA&mC"},
+  {"name": "i3omb", "url": "https://qbittorrent.i3omb.com", "username": "admin", "password": "b053288369XX!"}
+]