refactor: 将深度选择器语法更新为v-deep

-在多个Vue和SCSS文件中用::v-deep替换弃用的/deep/选择器，以便更好地与Vue的范围样式兼容。

uview-ui/components/u-dropdown-list/u-dropdown-list.vue

@@ -232,7 +232,7 @@ export default {
   > text {
     margin-right: 10rpx;
   }
-  /deep/ {
+  ::v-deep {
     .uicon {
       position: relative;
       top: -2rpx;

uview-ui/components/u-table/u-table.vue

@@ -88,7 +88,7 @@
 	}
 
 	/* #ifdef MP */
-	.u-table /deep/ t-tr {
+	.u-table ::v-deep t-tr {
 		display: flex;
 	}
 	/* #endif */

uview-ui/components/u-tabs-swiper/u-tabs-swiper.vue

@@ -393,7 +393,7 @@
 
 	/* #ifdef H5 */
 	// 通过样式穿透，隐藏H5下，scroll-view下的滚动条
-	scroll-view /deep/ ::-webkit-scrollbar {
+	scroll-view ::v-deep ::-webkit-scrollbar {
 		display: none;
 		width: 0 !important;
 		height: 0 !important;

uview-ui/components/u-tabs/u-tabs.vue

@@ -312,7 +312,7 @@
 
 	/* #ifdef H5 */
 	// 通过样式穿透，隐藏H5下，scroll-view下的滚动条
-	scroll-view /deep/ ::-webkit-scrollbar {
+	scroll-view ::v-deep ::-webkit-scrollbar {
 		display: none;
 		width: 0 !important;
 		height: 0 !important;