补 C7 版本切换「重载当前预览」验收测试

- resourceVersionSwitch 新增用例：运行模块内切换版本必须既上报宿主又触发 onPlay 重载预览
- 覆盖验收用例 S16 的「并重载当前预览」条款（此前版本入口只测了记录层与高亮，重载没有守卫）
- 变异验证：摘掉 selectActiveVersion 里的 onPlay 调用后，该用例以 expected "spy" to be called at least once 失败
- 定向验证：resourceVersionSwitch 4 passed

apps/ai-game-creator-shell/tests/resourceVersionSwitch.test.tsx

@@ -216,6 +216,26 @@ describe('C7 运行模块版本切换', () => {
     expect(onActiveVersionChange).toHaveBeenCalledWith('version-root');
   });
 
+  test('reloads the current preview when the version changes in the run module', async () => {
+    installResourceCardIntersectionObserver();
+    const manifest = createVersionedManifest();
+    const onPlay = vi.fn();
+    const onActiveVersionChange = vi.fn();
+    renderWorkbench(manifest, { onPlay, onActiveVersionChange });
+
+    fireEvent.click(screen.getByRole('tab', { name: '运行' }));
+    fireEvent.click(await screen.findByLabelText(/^当前版本：/));
+    const menu = await screen.findByRole('listbox', {
+      name: '切换游戏版本',
+    });
+    fireEvent.click(within(menu).getByRole('option', { name: /初始版本/ }));
+
+    expect(onActiveVersionChange).toHaveBeenCalledWith('version-root');
+    // 验收用例 S16 的「并重载当前预览」：只改记录层而不重载，用户看到的仍是上一个版本的
+    // 画面（素材不可变，画面靠重载预览回到该版本对应的资源），切换就成了"点了没反应"。
+    expect(onPlay).toHaveBeenCalled();
+  });
+
   test('drives the "current use" card highlight from the active version', async () => {
     installResourceCardIntersectionObserver();
     const manifest = createVersionedManifest();