补充AGC模型目录异常revision的客户端用例

- 补充旧服务端不返回 revision（两次响应均为 undefined）时仍按目录变化刷新的用例
- 补充服务端目录重建导致 revision 回退（7 到 0）时仍更新界面的用例
- 补充 revision 未变化时不更新界面、沿用已应用目录的用例

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

@@ -400,3 +400,73 @@ test('reuses a single in-flight catalog request', async () => {
   await waitFor(() => expect(loadClientLlmModels).toHaveBeenCalledTimes(2));
   expect(loadClientLlmModels).toHaveBeenCalledTimes(2);
 });
+
+test('keeps refreshing when the server omits the catalog revision', async () => {
+  vi.mocked(loadClientLlmModels).mockResolvedValue({
+    defaultModelId: 'quality',
+    models: [
+      { id: 'quality', displayName: '高质量' },
+      { id: 'fast', displayName: '快速' },
+    ],
+    revision: undefined as unknown as number,
+  });
+  const onReady = vi.fn();
+  render(<ConversationModelSelect disabled={false} onReady={onReady} />);
+  await waitFor(() => expect(onReady).toHaveBeenLastCalledWith(true));
+
+  // 旧服务端不返回 revision 时，两次响应的 revision 都是 undefined，
+  // 不能因此判定「未变化」而停止刷新。
+  vi.mocked(loadClientLlmModels).mockResolvedValue({
+    defaultModelId: 'quality',
+    models: [
+      { id: 'quality', displayName: '高质量' },
+      { id: 'vision', displayName: '视觉' },
+    ],
+    revision: undefined as unknown as number,
+  });
+  fireEvent(window, new Event('focus'));
+  await waitFor(() => expect(loadClientLlmModels).toHaveBeenCalledTimes(2));
+  fireEvent.click(screen.getByRole('button', { name: '对话模型' }));
+  expect(await screen.findByRole('option', { name: '视觉' })).not.toBeNull();
+});
+
+test('applies a catalog when the revision goes backwards', async () => {
+  const onReady = vi.fn();
+  render(<ConversationModelSelect disabled={false} onReady={onReady} />);
+  await waitFor(() => expect(onReady).toHaveBeenLastCalledWith(true));
+
+  // 服务端目录重建后 revision 可能回退，仍要按「已变化」处理。
+  vi.mocked(loadClientLlmModels).mockResolvedValue({
+    defaultModelId: 'quality',
+    models: [
+      { id: 'quality', displayName: '高质量' },
+      { id: 'vision', displayName: '视觉' },
+    ],
+    revision: 0,
+  });
+  fireEvent(window, new Event('focus'));
+  await waitFor(() => expect(loadClientLlmModels).toHaveBeenCalledTimes(2));
+  fireEvent.click(screen.getByRole('button', { name: '对话模型' }));
+  expect(await screen.findByRole('option', { name: '视觉' })).not.toBeNull();
+});
+
+test('keeps the applied catalog when the revision is unchanged', async () => {
+  const onReady = vi.fn();
+  render(<ConversationModelSelect disabled={false} onReady={onReady} />);
+  await waitFor(() => expect(onReady).toHaveBeenLastCalledWith(true));
+
+  // revision 未变化时不更新界面，沿用已应用的目录。
+  vi.mocked(loadClientLlmModels).mockResolvedValue({
+    defaultModelId: 'quality',
+    models: [
+      { id: 'quality', displayName: '高质量' },
+      { id: 'vision', displayName: '视觉' },
+    ],
+    revision: 1,
+  });
+  fireEvent(window, new Event('focus'));
+  await waitFor(() => expect(loadClientLlmModels).toHaveBeenCalledTimes(2));
+  fireEvent.click(screen.getByRole('button', { name: '对话模型' }));
+  expect(screen.queryByRole('option', { name: '视觉' })).toBeNull();
+  expect(screen.getByRole('option', { name: '快速' })).not.toBeNull();
+});