Initial commit: Music Hub collaboration platform

Full-stack music production collaboration tool with:
- SvelteKit frontend with Design System (CSS vars, 8 shared components)
- Hono API with auth, projects, tracks, versions, comments
- PostgreSQL + Drizzle ORM (8 tables, roles, permissions)
- S3-compatible storage with presigned upload URLs
- wavesurfer.js audio player with waveform visualization
- A/B version comparison with synchronized playback
- Timestamped comments with threading and resolve workflow
- Magic Link authentication with Resend email integration
- Background audio processing (ffmpeg transcode + waveform peaks)
- Role-based access control (Owner, Engineers, Artist, Label, Management, Viewer)
- Toast notifications, skeleton loading, responsive layout
- Docker deployment setup (API + Web + Postgres)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.prod.yml

@@ -0,0 +1,44 @@
+services:
+  api:
+    build:
+      context: .
+      dockerfile: Dockerfile.api
+    ports:
+      - "3000:3000"
+    environment:
+      - DATABASE_URL=${DATABASE_URL}
+      - S3_ENDPOINT=${S3_ENDPOINT}
+      - S3_ACCESS_KEY=${S3_ACCESS_KEY}
+      - S3_SECRET_KEY=${S3_SECRET_KEY}
+      - S3_BUCKET=${S3_BUCKET}
+      - APP_URL=${APP_URL}
+      - MAGIC_LINK_SECRET=${MAGIC_LINK_SECRET}
+      - RESEND_API_KEY=${RESEND_API_KEY}
+      - EMAIL_FROM=${EMAIL_FROM}
+      - NODE_ENV=production
+    depends_on:
+      - postgres
+    restart: unless-stopped
+
+  web:
+    build:
+      context: .
+      dockerfile: Dockerfile.web
+    ports:
+      - "5173:3000"
+    environment:
+      - NODE_ENV=production
+    restart: unless-stopped
+
+  postgres:
+    image: postgres:16-alpine
+    environment:
+      POSTGRES_USER: musichub
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: musichub
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    restart: unless-stopped
+
+volumes:
+  pgdata: