修改引用逻辑，修改长期记忆bug

app/graph/graph_builder.py

@@ -5,18 +5,17 @@ LangGraph 状态图构建模块 - 精简版，仅负责组装图
 
 from langchain_core.language_models import BaseLLM
 from langgraph.graph import StateGraph, START, END
-
-# 本地模块
 from app.graph.state import MessagesState, GraphContext
 from app.nodes import (
+    should_continue,
     create_llm_call_node,
     create_tool_call_node,
     create_retrieve_memory_node,
     create_summarize_node,
-    should_continue
+    finalize_node,
 )
+from app.nodes.memory_trigger import memory_trigger_node, set_mem0_client
 from app.memory import Mem0Client
-from app.nodes.finalize import finalize_node
 
 
 class GraphBuilder:
@@ -45,6 +44,9 @@ class GraphBuilder:
         Returns:
             StateGraph 实例
         """
+        # 注入全局客户端
+        set_mem0_client(self.mem0_client)
+        
         builder = StateGraph(MessagesState, context_schema=GraphContext)
         
         # ⭐ 通过工厂函数创建节点（依赖注入）
@@ -55,6 +57,7 @@ class GraphBuilder:
         
         # 添加节点
         builder.add_node("retrieve_memory", retrieve_memory_node)
+        builder.add_node("memory_trigger", memory_trigger_node)
         builder.add_node("llm_call", llm_call_node)
         builder.add_node("tool_node", tool_call_node)
         builder.add_node("summarize", summarize_node)
@@ -62,7 +65,8 @@ class GraphBuilder:
 
         # 添加边
         builder.add_edge(START, "retrieve_memory")
-        builder.add_edge("retrieve_memory", "llm_call")
+        builder.add_edge("retrieve_memory", "memory_trigger")
+        builder.add_edge("memory_trigger", "llm_call")
         builder.add_conditional_edges(
             "llm_call",
             should_continue,