Add a dedicated artwork cache directory and save embedded album art from audio tags during library scans. Prefer embedded artwork for album cover resolution while keeping sidecar image files as the fallback path.
Track scanner status for the web API and Subsonic-compatible scan endpoints, add authenticated cover art serving, and wire album artwork into the web UI. Keep Subsonic auth limited to legacy password mode for now so behavior stays honest with the current bcrypt-based user storage.
Add a filesystem scanner that ingests supported audio files from MEDIA_ROOT into SQLite using embedded tags with filename fallbacks. Wire startup scanning, manual rescan, and authenticated audio streaming into the backend, then connect the web player to the real stream endpoint.
