fix: 替换 %placeholder 后侧边栏 tip-line 样式丢失 (#132)

src/layouts/components/Sidebar/index.vue

@@ -145,19 +145,15 @@ const tipLineWidth = computed(() => {
   }
 }
 
-:deep(.el-menu-item) {
-  &.is-active {
+:deep(.el-menu-item.is-active) {
   @extend %tip-line;
 }
-}
 
 .el-menu--collapse {
-  :deep(.el-sub-menu) {
-    &.is-active {
+  :deep(.el-sub-menu.is-active) {
     .el-sub-menu__title {
       @extend %tip-line;
     }
   }
 }
-}
 </style>