New SSO feature with complete authentication system:
- Email/password authentication with session management
- Multi-factor authentication (MFA) with TOTP support
- User registration and login flows
- Session handling with secure cookies
- Handlebars UI templates for auth flows
- Email client integration for notifications
Includes comprehensive test coverage for auth, MFA, sessions, and users.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
e0e549dc60