- improve icon & tint color selection page
- other minor improvements

- Improve Pomodoro screen, adding intensive mode
- Update Home screen
- Update Select target screen
- Update statistic screen
- Update Challenge main screen & details page
- Some other UI improvements

- Fix issue showing notification for checked target
- Some minor improvements

- Update for iOS 15
- Minor improvements

- Enable Night theme

- Update Pomodoro screen
- Add Focus mode
- Some minor improvement
- Some minor UI adjustment

- Bug fixes and performance improvements.