feat: DAG可视化编排画布 - 图查询/依赖增删接口 + React Flow画布

frontend/src/components/AppLayout.tsx

@@ -18,6 +18,7 @@ import {
   AuditOutlined,
   AlertOutlined,
   BookOutlined,
+  ApartmentOutlined,
   LogoutOutlined,
   MenuFoldOutlined,
   MenuUnfoldOutlined,
@@ -62,6 +63,11 @@ const menuItems: MenuProps['items'] = [
     icon: <CheckSquareOutlined />,
     label: '任务管理',
   },
+  {
+    key: '/dag',
+    icon: <ApartmentOutlined />,
+    label: 'DAG 编排',
+  },
   {
     key: '/workers',
     icon: <RobotOutlined />,