fix(test): #2181 补改 timeout 30→45 assertion

tests/unit/test_ai_client.py

@@ -52,7 +52,7 @@ class TestDoubaoClientInit:
         assert client.api_key == "test-api-key"
         assert client.model == "doubao-pro-32k"
         assert client.base_url == "https://ark.example.com/api/v3"
-        assert client.timeout == 30
+        assert client.timeout == 45
         assert client.max_retries == 2
 
     def test_base_url_strips_trailing_slash(self, mock_settings):