🎵 Music Player Backend (SQLite Powered)

Endpoints:

• GET /api/songs – List all songs (JSON)
• GET /api/health – Server status + song count

Download a song: POST /api/download with JSON {"url": "YouTube URL"}

Stream a song: GET /api/stream?path=/full/path/to/song.mp3

Rescan library: POST /api/rescan (if you added files manually)