fix(admin-web): 时间渲染收口到 formatUtcTime,消灭 new Date().toLocaleString

review 发现 4 处仍用 new Date(v).toLocaleString 渲染后端 UTC 口径时间戳——
正是 lib/format.ts 头注释明令消灭的反模式(SQLite 本地/非中国浏览器会差 8h,
生产靠 +00:00 偏移侥幸正确)。统一改用 formatUtcTime 按北京显示:
- admins: last_login_at
- audit-logs: created_at
- devices: completed_at
- dashboard/HomeStatsConfig: ops_stat_config.updated_at
均为 server_default now()/datetime.now(utc) 的 UTC 口径字段。
HomeStatsConfig 的「下个更新时刻」用 epoch ms + 强制 Asia/Shanghai,正确,不动。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/(main)/admins/page.tsx

@@ -4,6 +4,7 @@ import { useEffect, useState } from 'react';
 import type { ColumnsType } from 'antd/es/table';
 import { Button, Form, Input, Modal, Select, Table, Tag, message } from 'antd';
 import { api, errMsg } from '@/lib/api';
+import { formatUtcTime } from '@/lib/format';
 import type { AdminInfo } from '@/lib/types';
 
 const ROLES = [
@@ -11,7 +12,8 @@ const ROLES = [
   { value: 'finance', label: 'finance' },
   { value: 'operator', label: 'operator' },
 ];
-const dt = (v: string | null) => (v ? new Date(v).toLocaleString('zh-CN') : '从未');
+// last_login_at 为 UTC 口径(datetime.now(utc)),按北京显示(勿用 new Date().toLocaleString)
+const dt = (v: string | null) => (v ? formatUtcTime(v, 'YYYY-MM-DD HH:mm:ss') : '从未');
 
 export default function AdminsPage() {
   const [admins, setAdmins] = useState<AdminInfo[]>([]);

src/app/(main)/audit-logs/page.tsx

@@ -3,10 +3,12 @@
 import { useState } from 'react';
 import type { ColumnsType } from 'antd/es/table';
 import { Button, Input, Space, Table, Tag } from 'antd';
+import { formatUtcTime } from '@/lib/format';
 import { useCursorList } from '@/lib/useCursorList';
 import type { AuditLog } from '@/lib/types';
 
-const dt = (v: string) => new Date(v).toLocaleString('zh-CN');
+// 审计 created_at 为 UTC 口径(server_default now()),按北京显示(勿用 new Date().toLocaleString)
+const dt = (v: string) => formatUtcTime(v, 'YYYY-MM-DD HH:mm:ss');
 
 export default function AuditLogsPage() {
   const [action, setAction] = useState('');

src/app/(main)/dashboard/HomeStatsConfig.tsx

@@ -19,6 +19,7 @@ import {
   message,
 } from 'antd';
 import { api, errMsg } from '@/lib/api';
+import { formatUtcTime } from '@/lib/format';
 
 interface StatItem {
   metric: string; // help_users / total_compares / total_saved
@@ -601,7 +602,7 @@ export default function HomeStatsConfig() {
                         </span>
                         {it.updated_at && (
                           <span style={{ color: '#bbb' }}>
-                            更新于 {new Date(it.updated_at).toLocaleString('zh-CN')}
+                            更新于 {formatUtcTime(it.updated_at, 'YYYY-MM-DD HH:mm:ss')}
                           </span>
                         )}
                       </Space>

src/app/(main)/devices/page.tsx

@@ -4,10 +4,12 @@ import type { ColumnsType } from 'antd/es/table';
 import { Button, Modal, Popconfirm, Space, Table, message } from 'antd';
 import { api, errMsg } from '@/lib/api';
 import { canDo } from '@/lib/auth';
+import { formatUtcTime } from '@/lib/format';
 import { useCursorList } from '@/lib/useCursorList';
 import type { DeviceOnboardingItem } from '@/lib/types';
 
-const dt = (v: string) => new Date(v).toLocaleString('zh-CN');
+// completed_at 为 UTC 口径(server_default now()),按北京显示(勿用 new Date().toLocaleString)
+const dt = (v: string) => formatUtcTime(v);
 const EMPTY: Record<string, unknown> = {};
 
 export default function DevicesPage() {