refactor: 客服agent结构调整重构

tests/test_knowledge_router.py

@@ -1,9 +1,8 @@
 import tempfile
 import unittest
-from types import SimpleNamespace
 from unittest.mock import AsyncMock
 
-from api.routers.knowledge import (
+from api.chat.knowledge import (
     confirm_document_upload,
     delete_document,
     get_document,