refactor(layout): 优化外部链接跳转逻辑

- 移除了不必要的 router.resolve 调用- 直接使用 path.value作为外部链接地址 -简化了代码结构，提高了性能

Signed-off-by: mazeyang1 <1834413471@qq.com>

guns-front-project/src/layout/components/app-switch-modal.vue

@@ -76,9 +76,7 @@ const changeApp = item => {
         window.open(href, '_blank');
       } else {
         if (isExternalLink(path.value)) {
-          const { href } = router.resolve({
-            path: path.value
-          });
+          const href = path.value;
           window.open(href, '_blank');
         } else {
           router.push(path.value);