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/tests/conftest.py

@@ -0,0 +1,48 @@
+"""Top-level test fixtures. Unit tests use these mocked fixtures (no external services)."""
+
+import uuid
+from datetime import datetime, timezone
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+from sqlalchemy.ext.asyncio import AsyncSession
+
+
+@pytest.fixture
+def mock_session():
+    """AsyncSession mock for unit tests."""
+    session = AsyncMock(spec=AsyncSession)
+    session.flush = AsyncMock()
+    session.commit = AsyncMock()
+    session.rollback = AsyncMock()
+    session.refresh = AsyncMock()
+    session.get = AsyncMock(return_value=None)
+    session.execute = AsyncMock()
+    session.delete = AsyncMock()
+    session.add = MagicMock()
+    return session
+
+
+@pytest.fixture
+def sample_member_id():
+    return uuid.uuid4()
+
+
+@pytest.fixture
+def sample_band_id():
+    return uuid.uuid4()
+
+
+@pytest.fixture
+def sample_song_id():
+    return uuid.uuid4()
+
+
+@pytest.fixture
+def sample_version_id():
+    return uuid.uuid4()
+
+
+@pytest.fixture
+def sample_annotation_id():
+    return uuid.uuid4()