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。

pages/promotion/point/pointList.vue

@@ -290,7 +290,7 @@ page {
 }
 
 .index-item-img {
-  /deep/ .u-image {
+  ::v-deep .u-image {
     width: 346rpx !important;
     height: 320rpx !important;
     border-radius: 10rpx !important;

pages/promotion/style.scss

@@ -26,7 +26,7 @@
 	color: #999999;
 	margin: 0 20rpx;
 
-	/deep/ view {
+	::v-deep view {
 		line-height: 1.75;
 	}
 }
@@ -121,7 +121,7 @@
 	text-align: center;
 	padding: 6rpx 16rpx;
 }
-/deep/ .empty {
+::v-deep .empty {
 	position: relative;
 	padding-top: 20%;
 	> .empty-content {