fix: 修复订单管理功能

packages/app/src/pages/admin/orders.vue

@@ -44,7 +44,9 @@
       class="list-scroll"
       :refresher-enabled="true"
       :refresher-triggered="refreshing"
+      :lower-threshold="120"
       @refresherrefresh="onRefresh"
+      @scrolltolower="loadMore"
     >
       <!-- Loading skeleton -->
       <view v-if="loading && !orders.length" class="order-list">
@@ -120,7 +122,7 @@
       </view>
 
       <!-- Load more / no more -->
-      <view v-if="hasMore" class="load-more" @tap="loadMore">
+      <view v-if="hasMore" class="load-more">
         <text class="load-more-text">{{ loading ? '加载中...' : '加载更多' }}</text>
       </view>
       <view v-else-if="orders.length > 0" class="no-more">