Record button had active:scale-[0.93] transition-all, which contradicts
the brand motion guideline ("never bounce, slow, calm, deliberate"). The
record button is the most-touched control in the app; a 7% press-shrink
on it sets the wrong tone for everything else.
Removed the scale transform, removed the inline transition-duration
override (the global * rule in app.css already animates the named
properties at --duration-ui). Also updated the inline shadow rgba from
(232,168,124,0.3) to (201,133,85,0.3) so the glow tracks the new
a11y-darkened accent fill instead of the pre-Phase-10a amber.