重构：继续移除对 debug_info 的依赖，主要模块已完成迁移

backend/app/main_graph/nodes/hybrid_router.py

@@ -219,8 +219,8 @@ def route_from_hybrid_decision(state: MainGraphState) -> str:
 
 
 def check_fast_path_success(state: MainGraphState) -> str:
-    """检查快速路径是否成功"""
-    if state.debug_info.get("fast_path_failed"):
+    """检查快速路径是否成功 - 使用新的结构化字段"""
+    if state.fast_path.failed:
         info("[Fast Path Check] 快速路径失败，升级到 React 循环")
         return "escalate"
     

backend/app/main_graph/nodes/routing.py

@@ -45,8 +45,8 @@ def route_by_reasoning(state: MainGraphState) -> str:
 
     info(f"[条件路由] step={state.reasoning_step}, phase={state.current_phase}, history={previous_actions}")
 
-    # ========== 获取推理结果 ==========
-    reasoning_result = state.debug_info.get("reasoning_result")
+    # ========== 获取推理结果 - 从新的结构化字段获取 ==========
+    reasoning_result = state.react_reasoning.reasoning_result
     latest_action = reasoning_result.action.name if reasoning_result else None
 
     # ========== 核心检查：DIRECT_RESPONSE 优先 ==========

backend/app/main_graph/nodes/web_search.py

@@ -35,8 +35,8 @@ async def web_search_node(state: MainGraphState, config: Optional[RunnableConfig
         except Exception as e:
             info(f"[web_search_node] 无法发送开始事件: {e}")
 
-    # 获取搜索查询
-    reasoning_result = state.debug_info.get("reasoning_result")
+    # 获取搜索查询 - 从新的结构化字段获取
+    reasoning_result = state.react_reasoning.reasoning_result
     search_query = reasoning_result.metadata.get("search_query", state.user_query) if reasoning_result else state.user_query
 
     try: