test: guard removed mobile and web ui shims

docs/plans/2026-03-29-focus-panel-dedupe-implementation-plan.md

@@ -11,8 +11,8 @@
   - `lib/widgets/assistant_focus_panel_core.dart`
   - `lib/widgets/assistant_focus_panel_previews.dart`
   - `lib/widgets/assistant_focus_panel_support.dart`
-- Web 侧旧的 `web_focus_panel_core.dart`、`web_focus_panel_previews.dart`、`web_focus_panel_support.dart` 已不再存在。
-- 本轮进一步移除了 `lib/web/web_focus_panel.dart` 这一层兼容导出，Web Assistant 侧不再保留旧入口。
+- Web 侧旧 Focus Panel 副本与兼容入口已全部删除。
+- Web Assistant 侧已直接依赖共享 Focus Panel 实现。
 
 ## 验收关注点
 

docs/plans/2026-03-29-settings-assistant-ui-component-matrix.md

@@ -55,11 +55,7 @@
 
 说明：
 
-- `web_focus_panel_core.dart`
-- `web_focus_panel_previews.dart`
-- `web_focus_panel_support.dart`
-
-这三份旧 Web Focus Panel 副本已经不再存在，不再列入候选池。
+- 旧 Web Focus Panel 副本已经删除，不再列入候选池。
 
 ---
 
@@ -68,7 +64,7 @@
 ### 第一批：已完成
 
 - Web Focus Panel 共享化已收口到 `lib/widgets/assistant_focus_panel*.dart`
-- Web Assistant 不再通过单独的 `web_focus_panel.dart` 兼容壳间接引用共享组件
+- Web Assistant 已直接引用共享 Focus Panel 实现，不再保留旧兼容入口
 
 ### 第二批：已完成公共壳层收口
 
@@ -82,12 +78,12 @@ Desktop 与 Web 设置页当前已共用：
 
 ### 第三批：本轮完成
 
-- `IosMobileShell` 兼容壳删除后，以 `MobileShell` 作为唯一正式入口
+- 旧 iOS 移动兼容壳已删除，以 `MobileShell` 作为唯一正式入口
 
 ### 第四批：持续维护
 
 - 文档和测试应只引用当前仍存在的 UI 文件
-- 不再记录已经删除的旧 Web Focus Panel 副本路径
+- 守护测试应阻止旧兼容壳和旧副本路径回流
 
 ---
 

test/features/mobile/mobile_shell_suite.dart

@@ -1,6 +1,8 @@
 @TestOn('vm')
 library;
 
+import 'dart:io';
+
 import 'package:flutter/material.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:flutter/services.dart';
@@ -43,6 +45,18 @@ void main() {
         .setMockMethodCallHandler(mobileScannerChannel, null);
   });
 
+  test('mobile shell keeps a single active entrypoint', () {
+    expect(File('lib/features/mobile/mobile_shell.dart').existsSync(), isTrue);
+    expect(
+      File('lib/features/mobile/mobile_shell_core.dart').existsSync(),
+      isTrue,
+    );
+    expect(
+      File('lib/features/mobile/ios_mobile_shell.dart').existsSync(),
+      isFalse,
+    );
+  });
+
   Future<void> pumpMobileShell(
     WidgetTester tester, {
     required Widget child,

test/widgets/assistant_focus_panel_suite.dart

@@ -31,6 +31,23 @@ void main() {
     }
   });
 
+  test('legacy web focus panel duplicates stay removed', () {
+    const removedTargets = <String>[
+      'lib/web/web_focus_panel.dart',
+      'lib/web/web_focus_panel_core.dart',
+      'lib/web/web_focus_panel_previews.dart',
+      'lib/web/web_focus_panel_support.dart',
+    ];
+
+    for (final path in removedTargets) {
+      expect(
+        File(path).existsSync(),
+        isFalse,
+        reason: 'legacy file should stay removed: $path',
+      );
+    }
+  });
+
   testWidgets(
     'Settings focused preview reuses language and theme quick actions',
     (WidgetTester tester) async {