Constantin LeueandClaude Sonnet 5
fc7d014fda
- TopModeBar widget: persistent pill-shaped header (HTML prototype: #topBarWrap/#editModeBtn/#flyModeBtn) tinted in the active mode's color, with the inactive mode offered as a solid button in the corner to switch into it. - AppShell now provides a single shared Scaffold + Stack, overlaying TopModeBar on top of whichever screen (Plan/Fly) is active, instead of each screen owning its own Scaffold. - Wired the Fly button to AppModeCubit.toFly(), which enforces the Ready-to-Fly gate (doc 4.5). Since upload/verify isn't wired up yet, the gate is never satisfied yet, so tapping Fly now shows a SnackBar instead of throwing an uncaught StateError. - Extended the widget test to cover both the bar's presence and the gate-rejection path (was the source of a real bug: an initial negative-margin Container hack for the "bleed into the corner" look violated Container's margin.isNonNegative assertion and crashed the whole tree - fixed with padding instead). Verified with flutter analyze, flutter test, and a real run on the Pixel_10a emulator (visually matches the prototype screenshots in design/, Fly-tap correctly shows the gate message without crashing or switching mode). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>