feat: 添加登录页面 URL 检测功能；更新 H5ShellPage 状态管理以支持路由变化

test/widget_test.dart

@@ -50,6 +50,20 @@ void main() {
     expect(AppConfig.lineIndexForUrl('${lineUrl}login'), 0);
   });
 
+  test('detects only H5 login routes for shell line switch display', () {
+    expect(
+        AppConfig.isLoginPageUrl('https://h5-test.imharry.work/login'), isTrue);
+    expect(AppConfig.isLoginPageUrl('https://h5-test.imharry.work/app/login'),
+        isTrue);
+    expect(AppConfig.isLoginPageUrl('https://h5-test.imharry.work/#/login'),
+        isTrue);
+    expect(AppConfig.isLoginPageUrl('https://h5-test.imharry.work/'), isFalse);
+    expect(AppConfig.isLoginPageUrl('https://h5-test.imharry.work/contact'),
+        isFalse);
+    expect(AppConfig.isLoginPageUrl('https://h5-test.imharry.work/getCode'),
+        isFalse);
+  });
+
   test('refreshes an H5 route URL without adding branding to the URL', () {
     final uri = Uri.parse(
       AppConfig.withFreshShellParams(