The steps now travel a full width on the Expressive spatial spring instead
of a fifth of one under a cross-fade, so moving through the wizard reads as
a swipe. The view previews get a tonal bezel — they draw the app's own
surface, so against a chooser drawing the same surface they had no edge of
their own — and a wider gap under them before the option rows. The frame is
shared with the Settings preview pickers so the same choice still looks the
same wherever it is made.