refactor(menu): 外链/内嵌改为 type=E+component 统一判断

mock/menu.mock.ts

@@ -179,7 +179,7 @@ export default defineMock([
           children: [
             {
               path: "apifox",
-              component: null,
+              component: "iframe",
               name: "Apifox",
               meta: {
                 title: "Apifox",
@@ -225,7 +225,6 @@ export default defineMock([
             },
             {
               path: "https://juejin.cn/post/7228990409909108793",
-              name: "ext-30",
               meta: {
                 title: "平台文档(外链)",
                 type: "E",

src/views/system/menu/index.vue

@@ -775,17 +775,18 @@ function normalizeMenuPayload(): MenuForm {
   }
 
   if (payload.type === MenuTypeEnum.EXTERNAL) {
-    payload.component = undefined;
     payload.perm = undefined;
     payload.redirect = undefined;
     payload.alwaysShow = undefined;
     payload.params = [];
 
     if (!payload.component) {
+      // 新标签页：不需要路由名称、路径、缓存
       payload.routeName = undefined;
       payload.routePath = undefined;
       payload.keepAlive = undefined;
     } else if (!isStatusEnabled(payload.keepAlive)) {
+      // 内嵌但未开启缓存：不需要路由名称
       payload.routeName = undefined;
     }
   }