fix(admin): 后台时间统一展示为 YYYY-MM-DD HH:mm:ss（formatDateTime 全页接入）

admin-frontend-vue/src/pages/asin/DedupeRegistryPage.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { formatDateTime } from '@/utils/datetime'
 /** 数据去重总数据(registry)：对齐 admin panel-dedupe-total-data —— 扩充筛选(用户名/日期/分组)、行编辑/删除、新增/删除导入(轮询)、导出。 */
 import { onMounted, reactive, ref } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
@@ -300,7 +301,9 @@ onMounted(() => {
         <el-table-column label="分组" width="150">
           <template #default="{ row }">{{ (row as DedupeTotalItem).groupName || '—' }}</template>
         </el-table-column>
-        <el-table-column prop="createdAt" label="创建时间" width="170" />
+        <el-table-column prop="createdAt" label="创建时间" width="170">
+          <template #default="{ row }">{{ formatDateTime(row.createdAt) }}</template>
+        </el-table-column>
         <el-table-column label="操作" width="150" fixed="right">
           <template #default="{ row }">
             <el-button link type="primary" @click="openEdit(row as DedupeTotalItem)">编辑</el-button>