Android D-day countdown app built with Kotlin, Jetpack Compose, and Material 3.
- Add general / anniversary tab separation (Material 3 TabRow)
- Add anniversary repeat modes: 100-day intervals, monthly, yearly
- Add auto-advance: D-day automatically rolls to next occurrence
- Add milestone display: "200일째", "5개월째", "3주년"
- Add Korean lunar calendar support (KoreanLunarCalendar)
- Add lunar-solar date conversion and display
- Add Room DB migration (v2 → v3) preserving existing data
- Add race condition prevention: auto-advance runs before expired cleanup
- Initial release: D-day countdown with pixel character
- Schedule CRUD with swipe-to-delete and undo
- Urgency-based color coding (blue → orange → red)
- Material 3 light/dark theme with Pretendard font