• Subsonic REST API — full implementation backing browsing, search, stars (tracks/albums/artists), bookmarks, cross-device play queue, sharing, and jukebox control. Per-user API keys for client auth via apiKey= instead of username/password.
• Airsonic Refix web client bundled as a third UI option (config.ui: 'subsonic') — still hand-edit-only until the admin panel story lands.
• DLNA / UPnP MediaServer with three modes (disabled / same-port / separate-port). Six browse layouts per library, smart containers (recent, recently-played, most-played, favorites, shuffle, by-year), time-based seek, Samsung compatibility.
• Lyrics support — real GET /api/v1/lyrics + Subsonic getLyrics / getLyricsBySongId. Reads embedded tags (USLT, SYLT, Vorbis, MP4, APE) and sidecar .lrc / .txt files (including multi-language variants).
• LRCLib fallback — opt-in (lyrics.lrclib: true) auto-fetch from lrclib.net for tracks with no local lyrics, with optional sidecar write-back.
• Multi-artist / compilation support — tracks and albums now store multiple credited artists. Clicking an artist returns every album they appear on (primary, collab, or featured), not just albums where they're the sole artist.
• Server-side audio playback — /server-remote page + /api/v1/server-playback/*. Auto-detects and prefers MPD, falls back to MPV / VLC / MPlayer. Gated per-user by an opt-in permission flag.
• Inline waveform generation — rust scanner produces the 800-bar waveform during scan; admin UI gets the waveform-as-progress-bar with no delay thanks to per-queue prefetching.
• OpenSubsonic extended fields — sampleRate, channels, bitDepth on every song so clients can render "24/96 FLAC" quality badges.
• OpenAPI 3.0 spec — first complete machine-readable documentation of the REST API at docs/openapi.yaml.
• Per-library followSymlinks flag — scanner behavior is now configurable per folder in the admin panel instead of a global on/off.
• Playlist rename support in the default UI.