- Introduced TIMEZONES constant in models.py to store valid timezone options.
- Updated Visit, Transportation, and Lodging models to include timezone fields.
- Modified serializers to include timezone fields in VisitSerializer, TransportationSerializer, and LodgingSerializer.
- Enhanced DateRangeCollapse component to handle timezone selection and formatting.
- Implemented timezone formatting functions in LodgingCard and TransportationCard components.
- Updated LodgingModal and TransportationModal to bind timezone data.
- Added VALID_TIMEZONES to dateUtils for consistent timezone management across the application.
- Introduced DateRangeCollapse.svelte to manage date range selection with timezone support.
- Removed DateRangeDropdown.svelte as it was redundant.
- Updated LodgingModal and TransportationModal to utilize DateRangeCollapse for date selection.
- Enhanced date conversion utilities to handle all-day events correctly.
- Adjusted TimezoneSelector for improved accessibility and focus management.
- Updated date handling logic in dateUtils.ts to support all-day events.
- Modified test page to reflect changes in date range component usage.
