Adds SafeAreaInsets resource + SafeAreaInsetsPlugin that report the
OS-reserved regions (status bar, gesture/nav bar, display cutout)
around the playable surface. Desktop reports all zeros; Android
queries WindowInsets.getInsets(systemBars()) via JNI on the decor
view, polling for up to 120 frames since getRootWindowInsets()
returns null until the view is laid out.
UI that should respect the top inset carries a SafeAreaAnchoredTop
{ base_top } marker. A change-detection system re-applies
`base_top + insets.top` whenever the resource changes, so late
inset arrival (frame 1-3 on Android) and future orientation
changes flow through without re-spawning entities.
Wires the three top-anchored HUD spawn sites — hud_band, hud
column, action button row — to the new pattern. Spawn systems
take Option<Res<SafeAreaInsets>> so HudPlugin still works
standalone in unit tests (mirrors the existing FontResource
pattern).
Closes P0 #1 of docs/android/PLAYABILITY_TODO.md. Resolves the
status-bar/HUD collision visible in the v0.22.3 hardware
screenshot.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
funman300
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