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/repositories/comment.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+import uuid
+
+from sqlalchemy import select
+from sqlalchemy.orm import selectinload
+
+from rehearsalhub.db.models import SongComment
+from rehearsalhub.repositories.base import BaseRepository
+
+
+class CommentRepository(BaseRepository[SongComment]):
+    model = SongComment
+
+    async def list_for_song(self, song_id: uuid.UUID) -> list[SongComment]:
+        stmt = (
+            select(SongComment)
+            .options(selectinload(SongComment.author))
+            .where(SongComment.song_id == song_id)
+            .order_by(SongComment.created_at)
+        )
+        result = await self.session.execute(stmt)
+        return list(result.scalars().all())
+
+    async def get_with_author(self, comment_id: uuid.UUID) -> SongComment | None:
+        stmt = (
+            select(SongComment)
+            .options(selectinload(SongComment.author))
+            .where(SongComment.id == comment_id)
+        )
+        result = await self.session.execute(stmt)
+        return result.scalar_one_or_none()