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- replace all outdated flex-full utility classes with modern flex-1 across Vue components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/pages/home/components/LongTextGuideCard/index.vue

@@ -84,7 +84,7 @@
             </div>
           </div>
           <div class="long-text-guide-card__map-bar flex flex-items-center bg-white">
-            <div class="flex-full">
+            <div class="flex-1">
               <div class="color-1E293B text-[15px] font-900">{{ activeItem.action.title }}</div>
               <div class="color-94A3B8 text-[12px] font-800 mt-2">{{ activeItem.action.subtitle }}</div>
             </div>