Add null checks for expires_at and event_date fields to prevent
TypeError when calling parseISO() on null values. This fixes crashes
that occurred after making event dates optional.
- AdminDashboard: skip events with null expires_at in expiring filter
- GalleryPage: handle null expires_at in expiration calculation
- GalleryView: make daysUntilExpiration nullable with explicit checks
- EventDetailsPage: return null from safeParseDate for null inputs
Paul Nothaft
c5a8ffc08c