大幅変更＆環境バージョンアップ

lib/pages/WebView/WebView_page.dart

@@ -0,0 +1,22 @@
+import 'package:flutter/material.dart';
+import 'package:webview_flutter/webview_flutter.dart';
+
+class WebViewPage extends StatelessWidget {
+  final String url;
+
+  const WebViewPage({super.key, required this.url});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('WebView'),
+      ),
+      body: WebViewWidget(
+        controller: WebViewController()
+          ..setJavaScriptMode(JavaScriptMode.unrestricted)
+          ..loadRequest(Uri.parse(url)),
+      ),
+    );
+  }
+}