feat(mukke): rename LightWrite to Mukke and add music library, player, playlists

Combines LightWrite (beat/lyrics editor) and Mukke (iOS music player) into
a single web-based music workspace app. Archives the old Mukke mobile app.

- Rename: @lightwrite/* → @mukke/*, all branding, configs, Dockerfiles
- New DB schemas: songs, playlists, playlist_songs + songId FK on projects
- New backend modules: SongModule, PlaylistModule, LibraryModule
- New web: app shell with sidebar, library (songs/albums/artists/genres),
  web player (queue/shuffle/repeat/MediaSession), playlists, search,
  upload, dashboard, album/artist/genre detail pages
- Auth: add forgot-password + reset-password pages, extend auth store
- Tests: 40 backend unit tests (song, playlist, library services)
- Config: env generation, MinIO bucket, docker-compose prod, cloudflare
- Docs: update CLAUDE.md, auth guidelines with SvelteKit checklist

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cloudflared-config.yml

@@ -70,10 +70,10 @@ ingress:
   - hostname: photos-api.mana.how
     service: http://localhost:3039
 
-  # LightWrite App
-  - hostname: lightwrite.mana.how
+  # Mukke App
+  - hostname: mukke.mana.how
     service: http://localhost:5180
-  - hostname: lightwrite-api.mana.how
+  - hostname: mukke-api.mana.how
     service: http://localhost:3010
 
   # LLM Services