# Checklist

- [x] Descriptor supports Standard, Borderless, FullScreen, Tool, and BackgroundOnly modes.
- [x] World Clock Air APP uses FluentAvalonia standard title-bar chrome.
- [x] Whiteboard Air APP opens as a fullscreen titlebar-less window.
- [x] Air APP windows do not use fused desktop bottom-most services.
- [x] Air APP windows do not use `Topmost=true` promotion.
- [ ] Manual verification for each chrome mode once non-built-in Air APP declarations are added.