style(app): 优化图片预览弹窗样式

- 调整图片预览弹窗的背景色和最大宽度
- 修复 ItemList 组件中的 Lot 号码显示问题

app/app.vue

@@ -56,6 +56,10 @@ provide('slideDirection', slideDirection)
 </template>
 
 <style>
+.van-popup.van-popup--center.van-image-preview{
+  background-color: transparent!important;
+  max-width: 100%!important;
+}
 :root:root {
   --van-dialog-radius: 8px
 }

app/pages/home/components/ItemList/index.vue

@@ -93,7 +93,7 @@ function formatNumber(num) {
                       :src="item.artwork?.hdPic"
                       class="w-full object-cover rounded-4px"
                   />
-                  <div
+                  <div 
                       class="absolute rounded-2px overflow-hidden line-height-12px left-[8px] top-[8px] h-[17px] w-[60px] flex items-center justify-center bg-[#2b53ac] text-[12px] text-[#fff]"
                   >
                     Lot{{ formatNumber(item.index) }}