- Implement LoginUseCase with password verification and JWT token generation
- Generate user_auth token (without workspace) for initial login
- Create session with refresh_token in Redis
- Track last_login_at and last_login_ip
- Implement LogoutUseCase for single device or all devices
- Add RefreshTokenUseCase placeholder (to be implemented)
- Add 9 comprehensive unit tests (all passed)
Phase 4 Task 7/68 completed