Routed screens are transparent fragments rendered into the shell's single
Scaffold. A screen pushed on top (e.g. device detail) was therefore
see-through, leaving the screen beneath visible as it slid in, and the fade
page ignored secondaryAnimation so the covered screen sat frozen instead of
parallaxing out.
- Paint each routed page opaque (theme surface) so pushes cover cleanly.
- Drill into detail screens with a CupertinoPageTransition slide; the covered
page parallaxes out via the same route animation, so both move in lockstep
on the native iOS curve. Tabs keep their crossfade.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Switching between the top-level destinations went through the default
CupertinoPage slide, which is meant for forward pushes. For a peer
tab-switch it slid the incoming screen in over the outgoing one without
animating the old screen away, leaving it visible in the background.
Give the top-level routes a CustomTransitionPage crossfade; keep the
device-detail route on the default slide since it is a genuine drill-in.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
