- Created calendarWidgetIntegration.js as integration layer
- Modified calendarWidget.js to use new calendar filtering system
- Added fallback to legacy mode for backward compatibility
- Updated calendar_scripts.html to initialize integration
- Implemented fetchEventsForVisibleCalendars with calendar_id filtering
- Added event deduplication and color override from calendars
- Exposed window.calendarIntegration for global access
- Added comprehensive logging for debugging
Technical decisions:
- Non-invasive integration via optional chaining
- Callback-based synchronization (onCalendarToggle, onCalendarsChange)
- Parallel event loading with Promise.all()
- Automatic legacy mode when no calendars configured
