feat: add ESP32 DIY platform Phase 1 (marketplace scaffold)

- Docker Compose with Postgres, Redis, MinIO, backend, frontend (port 3200/3201)
- Prisma schema: User, Project, ProjectFile, Product, Order, FlashToken, Review, AuditLog
- Backend: JWT auth, project CRUD + file upload (MinIO + sharp WebP), admin approval flow
- Frontend: React + Vite SPA with auth, project/shop browse, seller dashboard, admin panel
- Admin: pending approval queue, user management, audit log viewer, stats dashboard
- Audit logging middleware for legal compliance
- Admin init script: createAdmin.js
- Full design document in PLATFORM_DESIGN.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

platform/frontend/src/main.jsx

@@ -0,0 +1,10 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import App from './App.jsx';
+import './index.css';
+
+ReactDOM.createRoot(document.getElementById('root')).render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>
+);