feat: Complete dashboard integration and full system testing

✅ Frontend-Backend Integration
- Created API service layer (frontend/src/services/api.ts)
- Updated ChatInterface component to use real API endpoints
- Added project management (download, delete) functionality
- Implemented proper error handling and loading states

✅ FastAPI Backend Enhancements
- Fixed user_id field in project metadata
- Added comprehensive API endpoints for chat, generation, and projects
- Implemented WebSocket support for real-time chat
- Fixed project listing and download functionality

✅ Mock Mode Implementation
- Added intelligent mock responses for testing
- Smart parsing of BPM, genre, and key from user input
- Realistic project configurations based on user requests
- Works without API keys (currently enabled)

✅ System Testing
- Tested complete flow: chat → generation → download
- Verified ALS file generation and format
- Validated all API endpoints
- Created comprehensive TESTING_REPORT.md
- Created QUICK_START.md guide

✅ Bug Fixes
- Fixed BPM extraction regex in mock mode
- Fixed project metadata user_id inclusion
- Resolved TypeScript compilation errors
- Fixed import syntax for type-only imports

📊 Test Results:
- Chat API: ✅ Working (mock responses)
- Project Generation: ✅ Working (creates valid ALS)
- Download: ✅ Working (818 byte ALS files)
- Project Listing: ✅ Working (filters by user_id)
- ALS Files: ✅ Valid XML/gzip format

🔧 Current Status:
- MOCK_MODE=true (full functionality without API keys)
- GLM4.6: Insufficient balance
- Minimax M2: Endpoint 404
- Ready for production after API fixes

🤖 Features:
- Multi-genre support (House, Techno, Hip-Hop, etc.)
- Automatic BPM/key detection
- Complete Ableton Live project structure
- Project history and management

Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

frontend/README.md

@@ -0,0 +1,73 @@
+# React + TypeScript + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) (or [oxc](https://oxc.rs) when used in [rolldown-vite](https://vite.dev/guide/rolldown)) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+
+## React Compiler
+
+The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
+
+## Expanding the ESLint configuration
+
+If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+
+```js
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+
+      // Remove tseslint.configs.recommended and replace with this
+      tseslint.configs.recommendedTypeChecked,
+      // Alternatively, use this for stricter rules
+      tseslint.configs.strictTypeChecked,
+      // Optionally, add this for stylistic rules
+      tseslint.configs.stylisticTypeChecked,
+
+      // Other configs...
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```
+
+You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+
+```js
+// eslint.config.js
+import reactX from 'eslint-plugin-react-x'
+import reactDom from 'eslint-plugin-react-dom'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+      // Enable lint rules for React
+      reactX.configs['recommended-typescript'],
+      // Enable lint rules for React DOM
+      reactDom.configs.recommended,
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```