style(splitGoods): 优化复制按钮样式及滚动条显示

- 为复制入仓号按钮添加样式类 copy-btn，调整布局为行内居中
- 在滚动视图中启用滚动条显示，提高用户交互体验

pages/arrivalRegister/splitGoods.vue

@@ -221,9 +221,9 @@
                             <text class="t2">{{ erp_order_sn_arr.length }}</text>
                             <text class="t1">个入仓号</text>
                         </view>
-                        <view class="copy" @click="copy()">复制入仓号</view>
+                        <view class="copy-btn row verCenter rowCenter" @click="copy()">复制入仓号</view>
                     </view>
-                    <scroll-view scroll-y="true" class="print-scroll">
+                    <scroll-view scroll-y="true" class="print-scroll" :show-scrollbar="true">
                         <view class="print-content row">
                             <view class="box row verCenter rowCenter" v-for="(item, index) in erp_order_sn_arr" :key="index">{{ item }}</view>
                         </view>