修复会员管理页面编译错误 - 添加缺失的computed导入

demo/frontend/src/views/MemberManagement.vue

@@ -149,7 +149,7 @@
 </template>
 
 <script setup>
-import { ref, onMounted } from 'vue'
+import { ref, onMounted, computed } from 'vue'
 import { useRouter } from 'vue-router'
 import { ElMessage, ElMessageBox } from 'element-plus'