feat(x-popup): 增加弹窗内列表自动定位功能- 在 x-popup 组件中添加 list-container 类名，用于后续定位操作

- 在 tangPopup.vue 中实现 scrollToCurrentItem 函数，用于滚动到当前选中的物品
- 监听弹窗显示状态，当弹窗显示时调用 scrollToCurrentItem 函数

app/components/x-popup/index.vue

@@ -44,7 +44,7 @@ const close=()=>{
 
       <!-- 内容区域 -->
       <div class="flex-1 px-16px py-18px overflow-hidden relative">
-        <div class="h-full overflow-y-auto relative">
+        <div class="h-full overflow-y-auto relative list-container">
           <slot/>
         </div>
       </div>

app/pages/liveRoom/components/SideButton/tangPopup.vue

@@ -31,6 +31,28 @@ const props = defineProps({
     default: ''
   }
 })
+const scrollToCurrentItem = () => {
+  if (!itemList.value?.length) return
+
+  setTimeout(() => {
+    const currentIndex = itemList.value.findIndex(
+        item => auctionData.value.artwork.index === item?.index
+    )
+    if (currentIndex > -1) {
+      const container = document.querySelector('.list-container')
+      const targetElement = document.querySelectorAll('.item-wrapper')[currentIndex]
+      if (targetElement && container) {
+        const containerTop = container.getBoundingClientRect().top
+        const elementTop = targetElement.getBoundingClientRect().top
+        const scrollTop = elementTop - containerTop + container.scrollTop
+        container.scrollTo({
+          top: scrollTop,
+          behavior: 'smooth'
+        })
+      }
+    }
+  }, 100)
+}
 const emit = defineEmits(['update:show'])
 const showDetailInfo=ref(null)
 const close = () => emit('update:show', false);
@@ -44,6 +66,13 @@ const loadMore = async () => {
   const { finished } = await getArtworkList()
   localState.value.finished = finished
 }
+watch(()=>props.show,(newValue)=>{
+  if (newValue){
+ nextTick(()=>{
+   scrollToCurrentItem()
+ })
+  }
+})
 </script>
 
 <template>
@@ -68,11 +97,12 @@ const loadMore = async () => {
               :finished="localState.finished"
               finished-text="没有更多了"
               @load="loadMore"
+
           >
             <div
                 v-for="(item,index) of itemList"
                 :key="item.uuid"
-                class="flex mb-21px"
+                class="flex mb-21px item-wrapper"
                 @click="openShow(item)"
             >
               <div