Root cause: iOS CallKit auto-dismisses incoming-call UI after ~5s when the
app is in foreground (because AppDelegate.didReceiveIncomingPush MUST call
reportNewIncomingCall — Apple requirement). That CallKit dismiss fires an
endCall event which our useCallKeepEvents.onEnd translated to declineCall,
unmounting the in-app /call screen before the user could tap accept/decline.
Fixes:
- useCallKeepEvents.onEnd: ignore CallKit endCall when iOS app is foreground
AND status==='incoming' (in-app UI is authoritative there). Comment with
big warning not to remove this again.
- call.tsx closeScreen: replace('/') instead of router.back() to avoid
GO_BACK action errors when navigation stack is inconsistent after long
calls (manifested as wrap-jsx.js crash in react-native-css-interop).
- useIncomingCalls: log CANCEL receive events for future diagnostics.
- call.ts: clog hangup/declineCall/closeScreen with reason+status for trace.
Verified: foreground call screen stays up the full UNANSWERED_MS (35s) and
caller-side hangup('unanswered') correctly triggers iPhone closeScreen via
cancel-broadcast.
