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/src/rehearsalhub/config.py

@@ -0,0 +1,35 @@
+from functools import lru_cache
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8", extra="ignore")
+
+    # Security
+    secret_key: str
+    jwt_algorithm: str = "HS256"
+    access_token_expire_minutes: int = 60 * 24 * 7  # 7 days
+
+    # Database
+    database_url: str  # postgresql+asyncpg://...
+
+    # Redis
+    redis_url: str = "redis://localhost:6379/0"
+    job_queue_key: str = "rh:jobs"
+
+    # Nextcloud
+    nextcloud_url: str = "http://nextcloud"
+    nextcloud_user: str = "ncadmin"
+    nextcloud_pass: str = ""
+
+    # App
+    domain: str = "localhost"
+    debug: bool = False
+
+    # Worker
+    analysis_version: str = "1.0.0"
+
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()  # type: ignore[call-arg]