v4.0.17 小程序版本优化

apps/mini-user/src/lib/datetime.ts

@@ -1,3 +1,40 @@
+const MS_MINUTE = 60_000;
+const MS_HOUR = 60 * MS_MINUTE;
+const MS_DAY = 24 * MS_HOUR;
+
+function shanghaiParts(input: string | Date) {
+  const d = input instanceof Date ? input : new Date(input);
+  if (Number.isNaN(d.getTime())) return null;
+  const sh = new Date(d.getTime() + 8 * 60 * 60 * 1000);
+  const p = (n: number) => String(n).padStart(2, '0');
+  return {
+    year: sh.getUTCFullYear(),
+    month: p(sh.getUTCMonth() + 1),
+    day: p(sh.getUTCDate()),
+    hour: p(sh.getUTCHours()),
+    minute: p(sh.getUTCMinutes()),
+  };
+}
+
+/** 核销走马灯时间：24 小时内相对时间，超过则显示具体时间 */
+export function formatRedeemRelativeTime(input?: string | Date | null): string {
+  if (input == null || input === '') return '刚刚';
+  const at = input instanceof Date ? input : new Date(input);
+  if (Number.isNaN(at.getTime())) return '刚刚';
+  const diffMs = Date.now() - at.getTime();
+  if (diffMs < MS_MINUTE) return '刚刚';
+  if (diffMs < MS_HOUR) return `${Math.floor(diffMs / MS_MINUTE)}分钟前`;
+  if (diffMs < MS_DAY) return `${Math.floor(diffMs / MS_HOUR)}小时前`;
+  const parts = shanghaiParts(at);
+  if (!parts) return '刚刚';
+  const nowParts = shanghaiParts(new Date());
+  const datePrefix =
+    nowParts && parts.year === nowParts.year
+      ? `${parts.month}-${parts.day}`
+      : `${parts.year}-${parts.month}-${parts.day}`;
+  return `${datePrefix} ${parts.hour}:${parts.minute}`;
+}
+
 /** 格式化为 Asia/Shanghai：2026-08-03 15:14:30（不依赖 Intl，兼容微信小程序） */
 export function formatShanghaiDateTime(input?: string | Date | null): string {
   if (input == null || input === '') return '—';