修复前后端显示异常问题（受试者、中心、负责人、日期等）

frontend/src/components/FaqList.vue

@@ -12,7 +12,9 @@
         <el-tag :type="scope.row.is_active ? 'success' : 'info'">{{ scope.row.is_active ? "是" : "否" }}</el-tag>
       </template>
     </el-table-column>
-    <el-table-column prop="updated_at" label="更新时间" width="180" />
+    <el-table-column prop="updated_at" label="更新时间" width="180">
+      <template #default="scope">{{ displayDateTime(scope.row.updated_at) }}</template>
+    </el-table-column>
     <el-table-column label="操作" width="180">
       <template #default="scope">
         <el-button type="text" size="small" @click="view(scope.row)">查看</el-button>
@@ -41,6 +43,7 @@ import { useRouter } from "vue-router";
 import { updateFaqItem } from "../api/faqs";
 import type { FaqItem, FaqCategory } from "../api/faqs";
 import PermissionAction from "./PermissionAction.vue";
+import { displayDateTime } from "../utils/display";
 
 const props = defineProps<{
   items: FaqItem[];