The workspace gate (loading/unreachable/missing) used surfaceWorkspace,
which clashed with the panels' surface0. Switch the gate shell to
surface0 so it matches the agent panel.
Also remove three hot-path useUnistyles() calls from _layout.tsx that
were re-rendering the whole app on every theme/breakpoint/insets change:
RootLayout and AppContainer move to StyleSheet.create, and the desktop
window-controls effect lifts into a small leaf component.
Mohamed Boudra
6d13796b2d