fix feishu reauth for online docs

tests/test_feishu_integration.py

@@ -109,6 +109,34 @@ class FeishuIntegrationTests(unittest.TestCase):
             )
             self.assertEqual(online_docs['files'][str(file_path)]['kind'], 'doc')
 
+    def test_create_online_doc_returns_login_required_when_mcp_token_expired(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            client, state = _build_client(Path(tmp_dir))
+            file_path = _write_account_file(state, 'alice', 'draft.md', '# hello')
+
+            with patch.object(
+                gui_server,
+                '_feishu_status_payload',
+                return_value={'logged_in': True, 'status': 'logged_in'},
+            ), patch.object(
+                gui_server.MCPRuntime,
+                'call_tool',
+                side_effect=RuntimeError('登录已过期或未登录，请重新授权'),
+            ), patch.object(
+                gui_server,
+                '_run_feishu_cli',
+                return_value={'returncode': 0, 'output': 'logged out'},
+            ):
+                response = client.post(
+                    '/api/files/online-doc',
+                    json={'account_id': 'alice', 'path': str(file_path)},
+                )
+
+        self.assertEqual(response.status_code, 409)
+        detail = response.json()['detail']
+        self.assertEqual(detail['code'], 'feishu_auth_expired')
+        self.assertTrue(detail['force_login'])
+
     def test_create_online_doc_converts_csv_to_feishu_sheet(self) -> None:
         with tempfile.TemporaryDirectory() as tmp_dir:
             client, state = _build_client(Path(tmp_dir))