fix: 修复vip-tag不显示的问题

- 移除绝对定位，改为flex布局
- vip-tag作为user-name-row的子元素正常显示
- 用户名和会员标签顶端对齐

xuan-deduct-uniapp/src/pages/mine/mine.vue

@@ -163,11 +163,10 @@ page {
 }
 
 .user-name-row {
-  display: inline-flex;
+  display: flex;
   align-items: flex-start;
   justify-content: center;
-  position: relative;
-  padding-right: 80rpx;
+  margin-bottom: 8rpx;
 }
 
 .username {
@@ -178,9 +177,7 @@ page {
 }
 
 .vip-tag {
-  position: absolute;
-  top: 0;
-  right: 0;
+  margin-left: 8rpx;
   padding: 1rpx 8rpx;
   border-radius: 12rpx;
   line-height: 1.2;
@@ -207,7 +204,7 @@ page {
 }
 
 .vip-tag-text {
-  font-size: 18rpx;
+  font-size: 16rpx;
   font-weight: 500;
   color: #ffffff;
 }