feat: improve agent collaboration observability

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

@@ -116,17 +116,12 @@ class IntentNode(BaseNode):
                     error='请至少配置一个意图',
                 )
             
-            if not model_id:
-                return NodeResult(
-                    success=False,
-                    error='请选择用于意图识别的模型',
-                )
-            
+            llm_service = LLMService(context.db_session)
+            model_id = await llm_service.resolve_chat_model_id(model_id)
+
             # 检查模型是否支持 Function Calling
             supports_fc = self._check_model_supports_function_call(model_id)
             
-            llm_service = LLMService(context.db_session)
-            
             if supports_fc:
                 # 使用 Function Calling 方式（更准确）
                 intent_name, confidence, total_tokens = await self._execute_with_function_calling_async(
@@ -169,6 +164,7 @@ class IntentNode(BaseNode):
                     'intent': intent_name,
                     'confidence': confidence,
                     'matched_branch': next_node_id,
+                    'model_id': model_id,
                 },
             )