fix: improve maintenance and synchronize live conversations

backend/tests/api/test_chat.py

@@ -504,7 +504,6 @@ def test_get_chat_detail_with_shopify_output(
     test_customer
 ):
     """Test getting chat detail with Shopify output in attributes"""
-    import json
 
     # Create message with shopify_output in attributes
     shopify_data = {