# Tasks

- [x] Add Clock Air APP settings snapshot and JSON store.
- [x] Add shared Clock Air APP time formatting helpers.
- [x] Add stopwatch and timer state models with focused tests.
- [x] Replace the old world-clock view with `ClockAirAppView`.
- [x] Configure `world-clock` as a standard resizable Air APP window.
- [x] Make `world-clock` use a global single-instance key independent of source component id.
- [x] Add world clock city add, remove, and reorder behavior.
- [x] Add stopwatch tab with lap support.
- [x] Add timer tab with presets and custom duration.
- [x] Add independent Clock Air APP settings tab.
- [x] Add `zh-CN`, `en-US`, `ja-JP`, and `ko-KR` localization keys.
- [x] Ensure AirAppHost output includes localization JSON resources.
- [x] Add regression tests for Launcher keying, descriptors, settings, formatting, stopwatch, timer, and localization coverage.