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>

scripts/nc-setup.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+echo "→ Configuring Nextcloud via occ..."
+
+NC="docker compose exec -T nextcloud php occ"
+
+# Enable recommended apps
+$NC app:enable notify_push 2>/dev/null || echo "  notify_push not available, skipping"
+$NC app:enable files_accesscontrol 2>/dev/null || echo "  files_accesscontrol not available, skipping"
+
+# Create service account for rehearsalhub
+$NC user:add \
+  --display-name "RehearsalHub Service" \
+  --password-from-env \
+  rh_service \
+  <<< "${NEXTCLOUD_ADMIN_PASSWORD:-change_me}" || echo "  Service account may already exist"
+
+# Set permissions
+$NC user:setting rh_service core lang en
+$NC config:system:set trusted_domains 1 --value="${DOMAIN:-localhost}"
+$NC config:system:set trusted_domains 2 --value="nc.${DOMAIN:-localhost}"
+
+# Create base folder structure
+$NC files:scan --all
+
+echo "✓ Nextcloud setup complete"