Move shared constants and helper functions into CalendarUtils.kt, replace manual state synchronization with derivedStateOf in CalendarViewModel and UI composables. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Move shared constants and helper functions into CalendarUtils.kt, replace manual state synchronization with derivedStateOf in CalendarViewModel and UI composables. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>