Backend fixes:
- Fixed timezone-aware datetime comparison in verify_email endpoint
- Added trial_ends_at (14 days) for new registrations
- All datetime.now() calls now use timezone.utc
Frontend additions:
- Added EmailVerificationBanner component for unverified users
- Banner shows warning before trial banner in Dashboard
- Clear messaging about verification requirement
This fixes the 500 error on email verification and ensures new users
see both verification and trial status correctly.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
