chore: 弃用sass，使用原生css替换

src/layouts/components/SideMenu.vue

@@ -59,7 +59,7 @@ function handleMenuSelect(key, item) {
 }
 </script>
 
-<style lang="scss">
+<style>
 .side-menu:not(.n-menu--collapsed) {
   .n-menu-item-content {
     &::before {

src/layouts/components/tab/index.vue

@@ -74,7 +74,7 @@ async function handleContextMenu(e, tagItem) {
 }
 </script>
 
-<style scoped lang="scss">
+<style scoped>
 :deep(.n-tabs) {
   .n-tabs-tab {
     padding-left: 16px;