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>

api/Dockerfile

@@ -0,0 +1,22 @@
+FROM python:3.12-slim AS base
+WORKDIR /app
+RUN pip install uv
+
+FROM base AS development
+COPY pyproject.toml .
+RUN uv sync
+COPY . .
+CMD ["uv", "run", "uvicorn", "rehearsalhub.main:app", "--host", "0.0.0.0", "--port", "8000", "--reload"]
+
+FROM base AS lint
+COPY pyproject.toml .
+RUN uv sync --frozen
+COPY src/ src/
+RUN uv run ruff check src/ && uv run mypy src/
+
+FROM base AS production
+COPY pyproject.toml .
+RUN uv sync --no-dev --frozen || uv sync --no-dev
+COPY . .
+ENTRYPOINT ["sh", "entrypoint.sh"]
+CMD ["uv", "run", "uvicorn", "rehearsalhub.main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "2"]