feat: separate preset banks per channel (guitar/bass)

- Channel enum (GUITAR, BASS) with channel field on Preset dataclass - Channel-prefixed storage: {root}/{channel}/bank_{bank}/preset_{program}.json - PresetManager channel awareness: set_channel(), current_channel property - Per-channel state persistence (channel_state.json per channel dir) - Legacy migration: flat bank_* dirs auto-migrate to guitar/ on first boot - All CRUD methods accept optional channel parameter - API endpoints accept channel param on GET/PUT/DELETE /api/presets - /api/channel GET/POST for channel switching - 10 new channel tests (independence, switching, migration, scoping) - Factory presets install to specified channel
2026-06-12 23:22:47 -04:00
parent 0a21297f77
commit bfe1434f75
10 changed files with 1100 additions and 352 deletions
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