fix: map agent workflow inputs

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

@@ -91,6 +91,8 @@ class TemplateNode(BaseNode):
                 return NodeResult(success=False, error=f'智能体不存在或未发布: {agent_code}')
 
             model_id = self.config.get('model_id') or agent.model_id
+            if not model_id:
+                model_id = await self._resolve_default_chat_model_id(context)
             if not model_id:
                 return NodeResult(success=False, error=f'智能体未配置模型: {agent.name}({agent.code})')
 
@@ -148,6 +150,22 @@ class TemplateNode(BaseNode):
                 elapsed_time=int((time.time() - start_time) * 1000),
             )
 
+    @staticmethod
+    async def _resolve_default_chat_model_id(context: NodeContext) -> str:
+        from ai_platform.models import LLMModel
+
+        result = await context.db_session.execute(
+            select(LLMModel)
+            .where(
+                LLMModel.is_deleted == False,
+                LLMModel.is_active == True,
+                LLMModel.model_type == 'chat',
+            )
+            .order_by(LLMModel.sort.desc(), LLMModel.sys_create_datetime.desc())
+        )
+        model = result.scalars().first()
+        return str(model.id) if model else ''
+
     @staticmethod
     def _build_agent_system_prompt(agent: Any) -> str:
         base_prompt = agent.system_prompt or ''