Android Platform Rules

Respect safe areas, system bars, and gesture navigation.
Support Android back navigation through go_router without duplicating navigation state in Riverpod.
Use touch targets of at least 48 logical px where practical.
Account for the virtual keyboard and changing insets.
Prefer single-pane layouts on narrow screens.
Preserve editor state and scroll position during navigation.
Respect system text scaling and activity lifecycle events.
Verify keyboard, back navigation, lifecycle restoration, and safe-area behavior during smoke tests.