菜单显示调整

src/layouts/default/menu/components/BasicSubMenuItem.vue

 <template>
-  <BasicMenuItem v-if="!menuHasChildren && getShowMenu" v-bind="$props" />
+  <BasicMenuItem v-if="(!menuHasChildren && getShowMenu) || oneChildren" v-bind="$props" />
   <SubMenu
     v-if="menuHasChildren && getShowMenu"
     :key="`submenu-${item.path}`"
@@ -37,10 +37,12 @@ export default defineComponent({
   setup(props) {
     const getShowMenu = computed(() => !props.item.meta?.hideMenu)
 
-    const menuHasChildren = computed(() => props.item?.children && props.item?.children.length > 0)
+    const oneChildren = computed(() => props.item?.children?.length === 1)
+    const menuHasChildren = computed(() => props.item?.children && props.item?.children.length > 1)
 
     return {
       getShowMenu,
+      oneChildren,
       menuHasChildren
     }
   }