Add automated authentication testing infrastructure:
- AUTH-DEBUG-GUIDE.md: Complete guide for auth debugging
- auth-debug.spec.ts: Comprehensive auth flow validation tests
- playwright.auth.config.ts: Specialized config with extended timeouts
- auth-debug-setup.ts: Global test environment setup
- auth-debug-teardown.ts: Test cleanup and environment reset
Features:
- Admin user validation and permissions testing
- Email format validation including localhost domains
- User registration and OAuth integration testing
- Database connectivity and session management
- Password security and error handling validation
- Cross-browser testing with mobile support
- Enhanced reporting and interactive debugging
- CI/CD integration with artifacts and JUnit reports
Replaces manual browser console debugging scripts with
automated, cross-browser E2E tests for better reliability
and maintainability.