reducedMotion property
When true, morphTo degrades to set — zero frames.
The web driver queries matchMedia("(prefers-reduced-motion: reduce)")
inside morphTo itself. A pure Dart controller has no MediaQuery, so the
widget reads MediaQuery.disableAnimationsOf(context) and pushes it
here; the decision still happens in the same place it does on the web.
Implementation
bool reducedMotion = false;