feat(agents): guide first helper creation and trial

tests/unit/cloud-channel-conversations.test.tsx

@@ -53,7 +53,7 @@ it.each([
   api.call.mockImplementation(async (operation, input) => operation === 'channelConversation'
     ? { ...history, run: { ...run, status } } : base(operation, input));
   render(<CloudChannelConversations slug={session.agent_slug} />);
-  expect(await screen.findByTestId('wechat-run-status')).toHaveTextContent('任务状态：' + label);
+  await waitFor(() => expect(screen.getByTestId('wechat-run-status')).toHaveTextContent('任务状态：' + label));
 });
 
 it('keeps partial assistant output visible while surfacing a closed run failure and its authoritative error', async () => {