修复循环推理bug

backend/app/main_graph/nodes/__init__.py

@@ -2,25 +2,30 @@
 主图节点模块导出
 """
 
-# 新的 React 模式节点
-from .react_nodes import (
-    init_state_node,
-    react_reason_node,
-    web_search_node,
-    error_handling_node,
-    route_by_reasoning
-)
+# React 模式节点
+from .reasoning import react_reason_node
+from .web_search import web_search_node
+from .error_handling import error_handling_node
+from .routing import init_state_node, route_by_reasoning
 from .llm_call import create_llm_call_node
-from .rag_nodes import rag_retrieve_node
+from .rag_nodes import rag_retrieve_node, rag_re_retrieve_node
 
-# 记忆节点（已更新到 MainGraphState）
+# 记忆节点
 from .retrieve_memory import create_retrieve_memory_node
 from .memory_trigger import memory_trigger_node, set_mem0_client
 from .summarize import create_summarize_node
 from .finalize import finalize_node
 
-# 路由（已更新到 MainGraphState）
-from .router import should_continue
+# 混合路由节点
+from .hybrid_router import (
+    hybrid_router_node,
+    fast_chitchat_node,
+    fast_rag_node,
+    fast_tool_node,
+)
+
+# 通用工具
+from ._utils import dispatch_custom_event, make_react_event
 
 __all__ = [
     # React 模式节点
@@ -29,15 +34,21 @@ __all__ = [
     "web_search_node",
     "error_handling_node",
     "route_by_reasoning",
-    # 通用节点
     "create_llm_call_node",
     "rag_retrieve_node",
+    "rag_re_retrieve_node",
     # 记忆节点
     "create_retrieve_memory_node",
     "memory_trigger_node",
     "set_mem0_client",
     "create_summarize_node",
     "finalize_node",
-    # 路由
-    "should_continue",
+    # 混合路由节点
+    "hybrid_router_node",
+    "fast_chitchat_node",
+    "fast_rag_node",
+    "fast_tool_node",
+    # 通用工具
+    "dispatch_custom_event",
+    "make_react_event",
 ]