[Fixed] Use browser navigation

lib/util/router_extension.dart

@@ -0,0 +1,30 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+
+import 'package:auto_route/auto_route.dart';
+
+extension RouterExtension on StackRouter {
+  Future<bool> popBack() async {
+    if (kIsWeb) {
+      back();
+      return canNavigateBack;
+    } else {
+      return maybePop();
+    }
+  }
+
+  Widget? backButton() {
+    if (kIsWeb && canNavigateBack) {
+      return IconButton(
+        onPressed: back,
+        icon: const BackButtonIcon(),
+      );
+    } else if (canPop()) {
+      return IconButton(
+        onPressed: maybePop,
+        icon: const BackButtonIcon(),
+      );
+    }
+    return null;
+  }
+}