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>

Dockerfile.api

@@ -0,0 +1,23 @@
+FROM oven/bun:1 AS base
+WORKDIR /app
+
+FROM base AS install
+COPY package.json bun.lock ./
+COPY packages/shared/package.json ./packages/shared/
+COPY packages/db/package.json ./packages/db/
+COPY apps/api/package.json ./apps/api/
+RUN bun install --frozen-lockfile --production
+
+FROM base AS build
+COPY --from=install /app/node_modules ./node_modules
+COPY --from=install /app/packages/shared/node_modules ./packages/shared/node_modules
+COPY --from=install /app/packages/db/node_modules ./packages/db/node_modules
+COPY --from=install /app/apps/api/node_modules ./apps/api/node_modules
+COPY . .
+
+FROM base AS production
+RUN apt-get update && apt-get install -y --no-install-recommends ffmpeg && rm -rf /var/lib/apt/lists/*
+COPY --from=build /app .
+EXPOSE 3000
+ENV NODE_ENV=production
+CMD ["bun", "run", "apps/api/src/index.ts"]