A fullstack React + Hono app that lets you chat with ChatGPT, with user authentication and thread history.

• 🔐 Authentication via LastLogin (Google OAuth)
• 💬 Chat with ChatGPT (GPT-4o-mini)
• 📝 Thread-based conversation history
• 🗄️ SQLite storage for persistence
• 📱 Responsive design with TailwindCSS

├── backend/
│   └── index.ts             # Main Hono server with API routes
├── frontend/
│   ├── index.html           # Main HTML template
│   └── index.tsx            # React frontend app
└── README.md

Backend Foundation:

• ✅ Hono app with LastLogin authentication
• ✅ SQLite schema for threads and messages
• ✅ Basic API endpoints for threads CRUD
• ✅ Static file serving for React frontend

Frontend Foundation:

• ✅ React app with authentication UI
• ✅ Basic layout with sidebar for threads
• ✅ Login/logout flow with LoginWithGoogleButton
• ✅ Thread listing and creation
• ✅ Responsive design with TailwindCSS

Chat Interface:

• ✅ Chat message display with user/assistant styling
• ✅ Message input with textarea and send button
• ✅ OpenAI API integration (GPT-4o-mini)
• ✅ Real-time message updates
• ✅ Loading states and typing indicators
• ✅ Conversation history context

• GET / - Main React app
• GET /api/threads - List user's threads
• POST /api/threads - Create new thread
• GET /api/threads/:id/messages - Get messages for thread
• POST /api/threads/:id/messages - Send message and get AI response

Tables:

• last-login-chat-threads - User chat threads
• last-login-chat-messages - Individual messages in threads

• Phase 4: Thread management and auto-titles
• Phase 5: Final polish and responsive design

• /debug - Check authentication status
• /api/test-create-thread - Create a test thread (when logged in)