pub const SWITCH_SLIDE_MS: u64 = 140;Expand description
Fallback duration of the thumb slide when the switch flips, used when
the track carries no transition: bg ... TransitionSpecs (see
[slide_tween_params]). 140 ms sits between Slint’s 75 ms handle
tween and the 200 ms Qt QML Switch default - long enough to read as
motion, short enough to feel instant.