fix(FEAT-MO-001): 修正概览时间时区显示

web/src/utils/datetime.test.ts

@@ -0,0 +1,18 @@
+import { describe, expect, it } from 'vitest';
+
+import { formatShanghaiDateTime, formatShanghaiTime } from './datetime';
+
+describe('A 股时间显示格式化', () => {
+  it('将 UTC ISO 时间转换为上海时区的完整日期时间', () => {
+    expect(formatShanghaiDateTime('2026-08-24T14:16:26.813Z')).toBe('2026-08-24 22:16:26');
+  });
+
+  it('将 UTC ISO 时间转换为上海时区的时分秒', () => {
+    expect(formatShanghaiTime('2026-08-24T14:16:26.813Z')).toBe('22:16:26');
+  });
+
+  it('收到空值或非法日期时返回占位符', () => {
+    expect(formatShanghaiDateTime(undefined)).toBe('—');
+    expect(formatShanghaiTime('not-a-date')).toBe('—');
+  });
+});

web/src/utils/datetime.ts

@@ -0,0 +1,45 @@
+const SHANGHAI_TIME_ZONE = 'Asia/Shanghai';
+
+type DatePart = 'year' | 'month' | 'day' | 'hour' | 'minute' | 'second';
+
+function getShanghaiDateParts(value: string | undefined): Record<DatePart, string> | null {
+  if (!value) return null;
+
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) return null;
+
+  const parts = new Intl.DateTimeFormat('en-CA', {
+    timeZone: SHANGHAI_TIME_ZONE,
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+    hour: '2-digit',
+    minute: '2-digit',
+    second: '2-digit',
+    hourCycle: 'h23',
+  }).formatToParts(date);
+
+  const result = Object.fromEntries(
+    parts
+      .filter((part): part is Intl.DateTimeFormatPart & { type: DatePart } =>
+        ['year', 'month', 'day', 'hour', 'minute', 'second'].includes(part.type),
+      )
+      .map((part) => [part.type, part.value]),
+  ) as Partial<Record<DatePart, string>>;
+
+  if (Object.values(result).some((part) => !part)) return null;
+  return result as Record<DatePart, string>;
+}
+
+/** A 股页面统一使用上海时区，接口仍保留标准 UTC ISO 时间。 */
+export function formatShanghaiDateTime(value: string | undefined): string {
+  const parts = getShanghaiDateParts(value);
+  return parts
+    ? `${parts.year}-${parts.month}-${parts.day} ${parts.hour}:${parts.minute}:${parts.second}`
+    : '—';
+}
+
+export function formatShanghaiTime(value: string | undefined): string {
+  const parts = getShanghaiDateParts(value);
+  return parts ? `${parts.hour}:${parts.minute}:${parts.second}` : '—';
+}