Initial commit: RehearsalHub POC

Full-stack self-hosted band rehearsal platform:

Backend (FastAPI + SQLAlchemy 2.0 async):
- Auth with JWT (register, login, /me, settings)
- Band management with Nextcloud folder integration
- Song management with audio version tracking
- Nextcloud scan to auto-import audio files
- Band membership with link-based invite system
- Song comments
- Audio analysis worker (BPM, key, loudness, waveform)
- Nextcloud activity watcher for auto-import
- WebSocket support for real-time annotation updates
- Alembic migrations (0001–0003)
- Repository pattern, Ruff + mypy configured

Frontend (React 18 + Vite + TypeScript strict):
- Login/register page with post-login redirect
- Home page with band list and creation form
- Band page with member panel, invite link, song list, NC scan
- Song page with waveform player, annotations, comment thread
- Settings page for per-user Nextcloud credentials
- Invite acceptance page (/invite/:token)
- ESLint v9 flat config + TypeScript strict mode

Infrastructure:
- Docker Compose: PostgreSQL, Redis, API, worker, watcher, nginx
- nginx reverse proxy for static files + /api/ proxy
- make check runs all linters before docker compose build

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

traefik/traefik.yml

@@ -0,0 +1,25 @@
+api:
+  dashboard: true
+  insecure: true  # dashboard on :8080 (mapped to host 9080), disable in production
+
+log:
+  level: INFO
+
+entryPoints:
+  web:
+    address: ":80"
+  websecure:
+    address: ":443"
+
+providers:
+  file:
+    directory: /dynamic
+    watch: true
+
+certificatesResolvers:
+  letsencrypt:
+    acme:
+      email: "${ACME_EMAIL}"
+      storage: /acme/acme.json
+      httpChallenge:
+        entryPoint: web