fix: improve maintenance and synchronize live conversations

backend/tests/knowledge/test_content_summarizer.py

@@ -14,7 +14,6 @@ See the License for the specific language governing permissions and
 limitations under the License.
 """
 
-import pytest
 from unittest.mock import patch, MagicMock
 from app.knowledge.content_summarizer import ContentSummarizer, get_content_summarizer
 
@@ -360,7 +359,7 @@ class TestChatAgentURLInstructions:
             mock_agent_class.return_value = mock_agent_instance
 
             # Create chat agent
-            chat_agent = ChatAgent(
+            ChatAgent(
                 api_key="test_key",
                 model_name="gpt-4",
                 model_type="OPENAI",