[rrvsh]

Summary

MusicGrabber previously stored tracks under separate ~/Music/MusicGrabber/Singles and Albums roots. This changes Nemesis and Alpha to use one player-neutral library rooted at ~/Music/Mine.

Singles and albums both use the music root as their subfolder base. With MusicGrabber's default artist organisation, standalone tracks land directly under Artist/ while full albums land under Artist/Album/.

~/Music/Mine/
└── Artist/
    ├── Single.ext
    └── Album/
        └── 01 - Track.ext

Mixxx will select ~/Music/Mine as its runtime-owned library directory on each host. Mixxx 2.5.6 already bundles the official Pioneer DDJ-FLX4 mapping, so no mapping files are added.

Validation

• nix develop -c just format-nix
• nix develop -c just check-nix
• built, rebuilt and activated Nemesis
• built, rebuilt and activated Alpha
• verified both managed MusicGrabber services report ~/Music/Mine as their library root
• verified both report ./Artist Name/Track Title.flac as the standalone-track layout
• completed Nemesis Soulseek job 7670989d at /home/rafiq/Music/Mine/John Philip Sousa/The Stars and Stripes Forever - Ceremonial Music.mp3
• completed Alpha Soulseek job 7ecdc77a at /Users/rafiq/Music/Mine/John Philip Sousa/The Stars and Stripes Forever - Ceremonial Music.mp3
• verified neither download used a Singles directory

The old ~/Music contents were cleared on both hosts during pre-production setup; macOS's protected ~/Music/Music directory remains untouched.