autoHideOnModal property
When true (default), destroys the native button's PlatformView while a
modal sheet is presented above this widget's host route. Fixes the
iOS hybrid-composition z-order bleed (Issue #53) where a host-page
CNButton's pixels leak through a sheet that also contains a CN-widget.
Requires CNTabBarRouteObserver() to be registered in the app's
navigatorObservers. No effect on iOS < 26 / non-iOS (Flutter fallback).
Implementation
final bool autoHideOnModal;