- Increase the default floating tray border radius from 32 to 52.
- Introduce Flutter Tray with content-sized, keyed page transitions.
- Add standard and fully rounded floating presentations.
- Add arbitrary primary actions, action bars, and fully custom child layouts.
- Add page specs, scaffold slots, and action visibility policies.
- Add dismissal-attempt and keyboard-dismiss behavior.
- Add content, pixel, and viewport detents with fixed or stepless snap grids.
- Respect reduced-motion preferences without a third-party runtime dependency.