fix: Application export misalignment

Author: shaohuzhang1

apps/application/serializers/application_chat.py

@@ -192,6 +192,7 @@ def stream_response():
             worksheet.title = 'Sheet1'
 
             headers = [gettext('Conversation ID'), gettext('summary'), gettext('User Questions'),
+                       gettext('Problem after optimization'),
                        gettext('answer'), gettext('User feedback'),
                        gettext('Reference segment number'),
                        gettext('Section title + content'),