feat: restore source parity and harden agent runtime

backend-fastapi/ai_platform/nodes/builtin/dialog_nodes.py

@@ -570,7 +570,7 @@ class ConfirmNode(BaseNode):
         
         return False, False
     
-    def _llm_intent_recognition(self, user_input: str, context_content: str, model_id: str) -> bool:
+    def _llm_intent_recognition(self, user_input: str, context_content: str, model_id: str, db_session=None) -> bool:
         """
         使用 LLM 进行意图识别
         
@@ -595,7 +595,7 @@ class ConfirmNode(BaseNode):
 
 请判断用户意图："""
 
-            llm_service = LLMService()
+            llm_service = LLMService(db_session)
             response = llm_service.chat(
                 model_id=model_id,
                 messages=[
@@ -639,7 +639,9 @@ class ConfirmNode(BaseNode):
             if not matched and use_llm_intent and llm_model_id:
                 # 关键词未匹配，使用 LLM 意图识别
                 logger.info(f'关键词未匹配，使用 LLM 意图识别: {user_input}')
-                confirmed = self._llm_intent_recognition(str(user_input), content, llm_model_id)
+                confirmed = self._llm_intent_recognition(
+                    str(user_input), content, llm_model_id, context.db_session
+                )
             elif not matched:
                 # 关键词未匹配且未启用 LLM，默认为取消
                 logger.info(f'关键词未匹配，默认取消: {user_input}')