- Add authentication module with Google OAuth 2.0 and JWT strategies
- Create secure user management with email hashing (SHA-256)
- Implement rate limiting (10 requests/minute) for auth endpoints
- Add CSRF protection and security middleware
- Create user registration with Basic plan (50 quota default)
- Add JWT-based session management with secure cookies
- Implement protected routes with authentication guards
- Add comprehensive API documentation with Swagger
- Configure environment variables for OAuth and security
- Add user profile management and quota tracking
Resolves authentication requirements §18-20:
- §18: Google OAuth 2.0 with email scope only
- §19: Auto-create User record on first OAuth callback
- §20: Store only Google UID, display name, and email hash
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
