Give the active-pill tab strips the lifted, physical feel of a spring
capsule: the pill now travels with a slight overshoot instead of jumping,
leans toward a neighbouring tab on press, and sits on a raised surface with
a soft ambient shadow rather than a hard border.
Transitions are opt-in per switch so first measurement and container
resizes still snap into place, and reduced-motion disables them.
Also drop the icons from the git commit/update/pr switcher, along with the
now-unused iconOnlyActiveTab prop.
Bohdan Triapitsyn
aab9f3bca3