replaced ternary operator solution with custom adaptive_page_route.dart

lib/core/adaptive_page_route.dart

@@ -0,0 +1,19 @@
+import 'dart:io';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+Route<T> AdaptivePageRoute<T>({
+  required Widget Function(BuildContext) builder,
+  bool fullscreenDialog = false,
+}) {
+  if (Platform.isIOS) {
+    return CupertinoPageRoute<T>(
+      builder: builder,
+      fullscreenDialog: fullscreenDialog,
+    );
+  }
+  return MaterialPageRoute<T>(
+    builder: builder,
+    fullscreenDialog: fullscreenDialog,
+  );
+}