fix: recover Robot configuration loading

tests/unit/ai-hardware-page.test.tsx

@@ -366,6 +366,32 @@ describe('AI hardware page', () => {
     expect(screen.getByText('正在读取配置')).toBeInTheDocument();
   });
 
+  it('stops loading and lets the user retry after configuration loading fails', async () => {
+    api.getAiHardwareOverview.mockResolvedValueOnce({
+      status: 'active',
+      agents: [agentOne],
+      devices: [device],
+    });
+    api.getAiHardwareAgentConfiguration
+      .mockRejectedValueOnce(new AiHardwareApiError({
+        status: 502,
+        code: 'xiaozhi_hardware_unavailable',
+        message: 'private provider details',
+        retryable: true,
+      }))
+      .mockResolvedValueOnce({ data: configuration, revision: 4 });
+
+    render(<AiHardware />);
+
+    expect(await screen.findByRole('alert')).toHaveTextContent('无法读取智能体配置');
+    expect(screen.queryByText('正在读取配置')).not.toBeInTheDocument();
+
+    fireEvent.click(screen.getByRole('button', { name: '重试读取配置' }));
+    await waitFor(() => expect(api.getAiHardwareAgentConfiguration).toHaveBeenCalledTimes(2));
+    expect(await screen.findByText('保持简洁')).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: '编辑配置' })).toBeEnabled();
+  });
+
   it('loads the current assignment revision before reassigning a device', async () => {
     render(<AiHardware />);
     fireEvent.click(await screen.findByRole('button', { name: '重新指派' }));