feat: enhance deep link handling for install extensions (#1249)

ui/flutter/lib/app/modules/create/controllers/create_controller.dart

@@ -20,6 +20,9 @@ class CreateController extends GetxController
   final oldUrl = "".obs;
   final fileDataUri = "".obs;
 
+  /// Flag to prevent handling pending create task from deep link multiple times
+  bool pendingCreateHandled = false;
+
   @override
   void onInit() {
     super.onInit();