- new GrumpyMusic.md (full module page in DE: presets, modi, commands,
now-playing via Icecast metadata, robustness, permissions, FAQ)
- _Sidebar: Music link
- Home: Music in module list, two highlights (Music + Presence)
- Configuration: presence: block, channels.radio, music.yml row,
music: true toggle, auto-heal note
- Permissions: Set Voice Channel Status (1<<48) as optional bot perm
