refactor: replace flex-full with flex-1 and standardize scrollbar styles

- replace all outdated flex-full utility classes with modern flex-1 across Vue components
- standardize scrollbar hiding by using scrollbar-none utility instead of verbose vendor prefixes
- update order detail page layout and scroll container styling
- add scrollbar-none usage guidelines to AGENTS.md documentation

src/components/DetailPopup/index.vue

@@ -2,7 +2,7 @@
   <uni-popup ref="popupRef" type="bottom" :safe-area="false" @maskClick="handleClose">
     <div class="refund-popup bg-F5F7FA ">
       <div class=" flex flex-items-center justify-between pt-[12px] pb-[12px] relative">
-        <div class="flex-full text-[16px] text-[#171717] leading-[24px] text-center">
+        <div class="flex-1 text-[16px] text-[#171717] leading-[24px] text-center">
           明细详情
         </div>
         <!-- 关闭按钮 -->