docs: Add Symfonium setup and music features to README

- Add detailed Symfonium setup instructions (recommended Android client)
- Document all Subsonic-compatible client options with comparison table
- Add Music Features section covering sharing, lyrics, Spotify import, scrobbling
- Expand mobile apps section with cost and feature notes

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -226,10 +226,60 @@ The script uses rsync for efficient incremental uploads.
 - **iOS**: Swiftfin, Jellyfin Mobile
 
 ### Navidrome (Music)
-Navidrome is Subsonic-compatible. Use any Subsonic client:
+
-- **Android**: Ultrasonic, Symfonium, DSub
+Navidrome is Subsonic-compatible and provides a Spotify-like self-hosted music experience.
-- **iOS**: play:Sub, Amperfy, SubStreamer
+
-- **Desktop**: Sonixd, Sublime Music
+#### Recommended: Symfonium (Android - ~$5)
+
+The best mobile experience for Navidrome. Features:
+- Spotify-like UI with gapless playback
+- Offline downloads with smart caching
+- Android Auto, Chromecast, Wear OS support
+- Synced lyrics display
+- Multiple server support
+
+**Setup:**
+1. Install Symfonium from Google Play (~$5 one-time)
+2. Add Server → Subsonic/Navidrome
+3. Server URL: `https://music.jeffemmett.com`
+4. Enter your Navidrome username/password
+
+#### Other Clients
+
+| Platform | App | Cost | Notes |
+|----------|-----|------|-------|
+| Android | Symfonium | ~$5 | Best experience, recommended |
+| Android | Ultrasonic | Free | Solid open-source alternative |
+| iOS | Amperfy | Free | Clean UI, CarPlay support |
+| iOS | play:Sub | ~$5 | Polished experience |
+| Desktop | Sonixd | Free | Electron, cross-platform |
+| Desktop | Sublime Music | Free | GTK-based, Linux-native |
+| Web | Built-in | Free | `https://music.jeffemmett.com` |
+
+## Music Features
+
+### Sharing
+Share tracks/albums with anyone (no account needed):
+1. In Navidrome web UI, click any track/album
+2. Click ⋮ menu → **Share**
+3. Set expiration (or never)
+4. Copy the public link
+
+### Lyrics
+Lyrics are automatically fetched from LRCLIB and displayed in Symfonium during playback.
+
+### Spotify Playlist Import
+Lidarr syncs with your Spotify playlists:
+1. Go to `https://lidarr.jeffemmett.com`
+2. Settings → Import Lists → Add → Spotify Playlists
+3. Authenticate with Spotify
+4. Select playlists to monitor
+5. Lidarr downloads albums from artists in your playlists
+
+### Scrobbling (Optional)
+Track your listening history with Last.fm or ListenBrainz:
+1. In Navidrome: Settings → Personal → Link account
+2. All plays from web UI and Symfonium will scrobble
 
 ## Troubleshooting