feat:增加查询用户历史消息功能

services/agent_service.py

@@ -2,7 +2,7 @@ from langchain_core.messages import HumanMessage, AIMessageChunk, AIMessage
 
 from agent import agent, checkpointer, title_agent
 from model import ChatRequest
-from services.db_service import exists_session, save_session
+from services.db_service import exists_session, save_session, query_session_messages
 from utils import dicts_to_messages
 
 
@@ -78,3 +78,10 @@ def get_messages(thread_id: str) -> list[dict[str, str]]:
             result.append({"role": "ai", "content": msg.content})
 
     return result
+
+
+# 查询历史会话消息
+def get_user_session_messages(username: str):
+    """查询历史会话消息"""
+    print(f"查询历史会话消息，username: {username}")
+    return query_session_messages(username)