feat(video_calls): removed system ui, fixed wrong app initializing

lib/features/video_calls/services/video_call_callkit_coordinator.dart

@@ -14,6 +14,7 @@ import 'package:flutter/widgets.dart';
 import 'package:flutter_callkit_incoming/entities/call_event.dart';
 import 'package:flutter_callkit_incoming/entities/call_kit_params.dart';
 import 'package:flutter_callkit_incoming/flutter_callkit_incoming.dart';
+import 'package:flutter_native_splash/flutter_native_splash.dart';
 import 'package:sentry_flutter/sentry_flutter.dart';
 
 class VideoCallCallKitCoordinator {
@@ -57,8 +58,10 @@ class VideoCallCallKitCoordinator {
         }
       });
       await _firebaseApi.registerPushToken();
+      await _drainPendingNativeAcceptedVoipCall();
       WidgetsBinding.instance.addPostFrameCallback((_) {
         _scheduleNativeVoipDiagnosticsDrain();
+        unawaited(_drainPendingNativeAcceptedVoipCall());
       });
       return;
     }
@@ -137,6 +140,29 @@ class VideoCallCallKitCoordinator {
     }
   }
 
+  Future<void> _drainPendingNativeAcceptedVoipCall() async {
+    if (!Platform.isIOS) return;
+    try {
+      final pending = await _voipDiagnosticsChannel.invokeMethod(
+        'drainPendingAcceptedVoipCall',
+      );
+      if (pending == null) return;
+      await _handleNativeAcceptedVoipCall(pending);
+    } on PlatformException catch (e, st) {
+      log(
+        'VideoCallCallKitCoordinator: failed to drain pending native accept: $e',
+        name: 'VideoCallCallKit',
+        stackTrace: st,
+      );
+    } catch (e, st) {
+      log(
+        'VideoCallCallKitCoordinator: failed to process pending native accept: $e',
+        name: 'VideoCallCallKit',
+        stackTrace: st,
+      );
+    }
+  }
+
   Future<void> _onCallKitEvent(CallEvent? event) async {
     if (event == null) return;
     unawaited(_captureCallKitEventToSentry(event));
@@ -424,7 +450,9 @@ class VideoCallCallKitCoordinator {
     _suppressedEndCallKitIds.add(callKitId);
 
     try {
-      await FlutterCallkitIncoming.endCall(callKitId);
+      if (!Platform.isIOS) {
+        await FlutterCallkitIncoming.endCall(callKitId);
+      }
 
       final binding = WidgetsBinding.instance;
       final completer = Completer<void>();
@@ -439,6 +467,10 @@ class VideoCallCallKitCoordinator {
         );
       });
       await completer.future;
+
+      if (Platform.isIOS) {
+        await FlutterCallkitIncoming.endCall(callKitId);
+      }
     } finally {
       unawaited(
         Future<void>.delayed(const Duration(seconds: 2), () {
@@ -454,8 +486,12 @@ class VideoCallCallKitCoordinator {
     String? counterpartName,
     String? counterpartAvatarUrl,
     String? localParticipantName,
-  }) {
-    return VideoCallNotificationNavigator.openIncomingCall(
+  }) async {
+    if (Platform.isIOS) {
+      FlutterNativeSplash.remove();
+    }
+
+    await VideoCallNotificationNavigator.openIncomingCall(
       conversationUuid: conversationUuid,
       counterpartName: counterpartName,
       counterpartAvatarUrl: counterpartAvatarUrl,