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/src/services/api.ts

@@ -0,0 +1,134 @@
+/**
+ * API Service for MusiaIA Frontend
+ * Handles all communication with the FastAPI backend
+ */
+
+const API_BASE_URL = 'http://localhost:8000';
+
+export interface ChatMessageRequest {
+  user_id: string;
+  message: string;
+}
+
+export interface ChatMessageResponse {
+  response: string;
+  history: Array<{
+    role: string;
+    content: string;
+  }>;
+}
+
+export interface ProjectRequest {
+  user_id: string;
+  requirements: string;
+}
+
+export interface Project {
+  id: string;
+  name: string;
+  genre: string;
+  bpm: number;
+  key: string;
+  download_url: string;
+}
+
+export interface ProjectResponse extends Project {}
+
+export interface UserProjectsResponse {
+  projects: Project[];
+}
+
+class ApiService {
+  private userId: string;
+
+  constructor(userId: string = 'default-user') {
+    this.userId = userId;
+  }
+
+  /**
+   * Send a chat message to the AI
+   */
+  async sendChatMessage(message: string): Promise<ChatMessageResponse> {
+    const response = await fetch(`${API_BASE_URL}/api/chat`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({
+        user_id: this.userId,
+        message,
+      } as ChatMessageRequest),
+    });
+
+    if (!response.ok) {
+      throw new Error(`Chat request failed: ${response.statusText}`);
+    }
+
+    return response.json();
+  }
+
+  /**
+   * Generate a music project from requirements
+   */
+  async generateProject(requirements: string): Promise<ProjectResponse> {
+    const response = await fetch(`${API_BASE_URL}/api/generate`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({
+        user_id: this.userId,
+        requirements,
+      } as ProjectRequest),
+    });
+
+    if (!response.ok) {
+      throw new Error(`Project generation failed: ${response.statusText}`);
+    }
+
+    return response.json();
+  }
+
+  /**
+   * Get all projects for the current user
+   */
+  async getUserProjects(): Promise<UserProjectsResponse> {
+    const response = await fetch(`${API_BASE_URL}/api/projects/${this.userId}`);
+
+    if (!response.ok) {
+      throw new Error(`Failed to fetch projects: ${response.statusText}`);
+    }
+
+    return response.json();
+  }
+
+  /**
+   * Get the download URL for a project
+   */
+  getProjectDownloadUrl(projectId: string): string {
+    return `${API_BASE_URL}/api/download/${projectId}`;
+  }
+
+  /**
+   * Delete a project
+   */
+  async deleteProject(projectId: string): Promise<void> {
+    const response = await fetch(`${API_BASE_URL}/api/projects/${projectId}`, {
+      method: 'DELETE',
+    });
+
+    if (!response.ok) {
+      throw new Error(`Failed to delete project: ${response.statusText}`);
+    }
+  }
+
+  /**
+   * Create a WebSocket connection for real-time chat
+   */
+  createChatWebSocket(): WebSocket {
+    const wsUrl = `ws://localhost:8000/ws/chat/${this.userId}`;
+    return new WebSocket(wsUrl);
+  }
+}
+
+export const apiService = new ApiService();