fix: 修正服务端 UTC LocalDateTime 在浏览器中的解析偏差

Jackson 配置 time-zone: UTC，LocalDateTime 序列化为不含时区后缀的
ISO 字符串（如 "2026-05-21T14:30:00"）。浏览器将此类字符串视为本地
时间，导致非中国时区或非 UTC+8 环境出现 8 小时偏差。
修复：formatTime 对无时区后缀的 ISO 字符串补充 'Z'，确保按 UTC 解析
后再转换为北京时间。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ops-platform/src/utils/date.ts

@@ -1,7 +1,14 @@
 const TZ = 'Asia/Shanghai'
 
+function toUTC(value: string): string {
+  return /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}/.test(value) && !/[Z+\-]\d*$/.test(value)
+    ? value + 'Z'
+    : value
+}
+
 export function formatTime(value: string | number | null | undefined): string {
   if (value === null || value === undefined || value === '') return '-'
-  const date = new Date(value as string | number)
+  const input = typeof value === 'string' ? toUTC(value) : value
+  const date = new Date(input)
   return Number.isNaN(date.getTime()) ? '-' : date.toLocaleString('zh-CN', { timeZone: TZ })
 }

tenant-platform/src/utils/date.ts

@@ -1,7 +1,17 @@
 const TZ = 'Asia/Shanghai'
 
+// Backend serializes LocalDateTime without timezone (Jackson time-zone: UTC).
+// Bare ISO strings like "2026-05-21T14:30:00" are treated as local time by browsers,
+// so we append 'Z' to force UTC parsing before converting to Beijing time.
+function toUTC(value: string): string {
+  return /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}/.test(value) && !/[Z+\-]\d*$/.test(value)
+    ? value + 'Z'
+    : value
+}
+
 export function formatTime(value: string | number | null | undefined): string {
   if (value === null || value === undefined || value === '') return '-'
-  const date = new Date(value as string | number)
+  const input = typeof value === 'string' ? toUTC(value) : value
+  const date = new Date(input)
   return Number.isNaN(date.getTime()) ? '-' : date.toLocaleString('zh-CN', { timeZone: TZ })
 }