feat: implement complete database integration and API layer#32
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feat: implement complete database integration and API layer#32
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- Add PostgreSQL database connection and services layer - Create comprehensive database routes with CRUD operations for: * Users, projects, components, connections * Chat sessions and messages * Scratch notes - Add database connection utilities (connection.ts, services.ts) - Implement Express API routes with proper error handling - Add database setup and testing utilities: * setup-db.cjs for database initialization * test-db.cjs for connection and CRUD testing - Update server dependencies (pg, dotenv) - Add server documentation (README.md) - Configure TypeScript database integration This establishes the foundation for full-stack persistence in the Sidebar system design practice application.
- Add comprehensive API service layer (src/services/api.ts) * Complete TypeScript interfaces for all database entities * Service functions for projects, components, connections, chat, and notes * Full CRUD operations with proper error handling - Implement ProjectContext for project management * Project creation, selection, and loading functionality * Auto-load projects on app startup * Project state management across components - Enhance BoardContext with database persistence * Auto-save React Flow components and connections to database * Auto-load board state when switching projects * Convert between React Flow nodes/edges and database entities * Debounced saving (2-second delay) for performance - Upgrade ChatContext with persistent chat sessions * Create and manage chat sessions per project * Save all user and assistant messages to database * Auto-load chat history when switching projects * Maintain chat state across app sessions - Update Chat component for database integration * Save user messages immediately upon sending * Save AI responses after streaming completion * Preserve chat history across project switches - Add ProjectSelector component * Project dropdown in header with create/select functionality * Modal for creating new projects * Visual indication of current project * Responsive design with backdrop blur effects - Refactor App.tsx with new provider hierarchy * Nest ProjectProvider > BoardProvider > ChatProvider * Pass React Flow state to BoardProvider for persistence * Maintain existing UI structure and styling This establishes complete frontend-database integration, enabling: ✅ Persistent React Flow diagrams per project ✅ Persistent chat conversations per project ✅ Project management and switching ✅ Real-time auto-saving of all user data ✅ Seamless data recovery across sessions
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This establishes the foundation for full-stack persistence in the Sidebar system design practice application.