- Created frontend/e2e/helpers/auth.ts with shared auth utilities
- Extracted getRequiredEnv, REGULAR_USER, ADMIN_USER, clearAuth, loginUser
- Updated all three e2e test files to use shared helpers
- Reduced code duplication across test files
- Created frontend/app/utils/date.ts with formatDate, formatTime, formatDateTime, formatDisplayDate
- Created frontend/e2e/helpers/date.ts with formatDateLocal, getTomorrowDateStr
- Updated all frontend pages and e2e tests to use shared utilities
- Removed duplicate date formatting code from 6 files
- Use data-testid attributes to target specific day cards in availability tests
- Wait for networkidle before interacting with page elements
- Set up PUT and GET response listeners before triggering actions
- Add retry logic for availability API in booking tests
- Fix appointments test to handle multiple 'Booked' elements with .first()
- Increase parallel workers to 12 for faster test execution
