fix(outbound): 修复选单列表移除按钮排序后索引错位导致删错行

- 表格绑定 sortedSelectedItems（按库位排序），但移除按钮用 $index 操作原始 selectedItems
- 排序后索引与原始数组不一致，导致删除错误的行
- 改为按 uniqueKey 精确定位删除

inventory-web/src/views/outbound/Selection.vue

@@ -105,8 +105,8 @@
         </el-table-column>
 
         <el-table-column label="操作" width="80" align="center" fixed="right">
-          <template #default="{ $index }">
-            <el-button v-if="!isBulkMode && userStore.hasPermission('outbound_selection:operation')" type="danger" link @click="removeRow($index)">移除</el-button>
+          <template #default="{ row }">
+            <el-button v-if="!isBulkMode && userStore.hasPermission('outbound_selection:operation')" type="danger" link @click="removeRow(row)">移除</el-button>
           </template>
         </el-table-column>
       </el-table>
@@ -884,8 +884,12 @@ const batchRemove = () => {
   }).catch(() => {})
 }
 
-const removeRow = (index: number) => {
-  selectedItems.value.splice(index, 1)
+const removeRow = (row: any) => {
+  // ★ 按 uniqueKey 精确定位删除，避免排序后索引错位导致删错
+  const idx = selectedItems.value.findIndex(item => item.uniqueKey === row.uniqueKey)
+  if (idx > -1) {
+    selectedItems.value.splice(idx, 1)
+  }
 }
 
 const handlePreview = () => {