fix(mini-user): 去掉 Intl，兼容微信小程序无 Intl 环境

门店详情走马灯与核销成功时间改为纯 Date 计算东八区格式。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/mini-user/src/pages/redeem-success/index.tsx

@@ -4,6 +4,7 @@ import Taro, { useRouter } from '@tarojs/taro';
 import PageShell from '../../components/PageShell';
 import SubPageHeader from '../../components/SubPageHeader';
 import { request, toast } from '../../lib/api';
+import { formatShanghaiDateTime } from '../../lib/datetime';
 
 const LAST_REDEEM_RESULT_KEY = 'lastRedeemResult';
 
@@ -17,26 +18,17 @@ type RedeemRecord = {
 };
 
 function formatMoney(amount: number) {
-  return amount.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
+  const n = Number(amount);
+  if (!Number.isFinite(n)) return '0.00';
+  const fixed = n.toFixed(2);
+  const [intPart, dec] = fixed.split('.');
+  const withComma = intPart.replace(/\B(?=(\d{3})+(?!\d))/g, ',');
+  return `${withComma}.${dec}`;
 }
 
 /** 与权益「历史记录」一致：2026-08-03 13:53:03（Asia/Shanghai） */
 function formatChinaDateTime(input?: string | null) {
-  const d = input ? new Date(input) : new Date();
-  if (Number.isNaN(d.getTime())) return '—';
-  const parts = new Intl.DateTimeFormat('en-CA', {
-    timeZone: 'Asia/Shanghai',
-    year: 'numeric',
-    month: '2-digit',
-    day: '2-digit',
-    hour: '2-digit',
-    minute: '2-digit',
-    second: '2-digit',
-    hour12: false,
-  }).formatToParts(d);
-  const get = (type: Intl.DateTimeFormatPartTypes) =>
-    parts.find((p) => p.type === type)?.value ?? '';
-  return `${get('year')}-${get('month')}-${get('day')} ${get('hour')}:${get('minute')}:${get('second')}`;
+  return formatShanghaiDateTime(input ?? new Date());
 }
 
 function StarRating({