Release Candidate 2 for v1.0.0

Key improvements in RC2:
- Multi-location tracking fixes for foods and ingredients
- Duplicate detection with user confirmation modal
- Phone number auto-formatting (XXX) YYY-ZZZZ
- Store location CRUD operations fully functional
- Track meal feature displays location-specific quantities
- Enhanced UI/UX with warning modals and real-time validation

Bug fixes:
- Fixed duplicate modal form submission using requestSubmit()
- Fixed duplicate modal infinite loop on submission
- Store location delete/deactivate now working correctly
- Location-specific quantity updates properly handled

Technical enhancements:
- API endpoints for duplicate checking
- Location-specific update key format
- Improved JavaScript form handling with proper event flow
- Dark theme modal styling