重构(后台金额): 抽出统一的元金额格式化

- shared AdminFormat 新增 formatAdminCurrencyCents（分 → ¥x.xx）并从 components 导出
- AdminUserDetailDialog / AdminMembershipPlanPage / AdminRechargeOrderPage / AdminRechargeProductPage 删除各自重复的 formatMoney/formatPrice
- 补充 formatAdminCurrencyCents 单测，避免后台各页面金额格式漂移

packages/shared/src/components/admin/AdminFormat.test.ts

@@ -1,6 +1,10 @@
 import { describe, expect, test } from 'vitest';
 
-import { formatAdminDate, formatAdminDateTime } from './AdminFormat';
+import {
+  formatAdminCurrencyCents,
+  formatAdminDate,
+  formatAdminDateTime,
+} from './AdminFormat';
 
 describe('formatAdminDateTime', () => {
   test('把后端的 seconds.microsZ 口径当成同一时刻渲染', () => {
@@ -44,3 +48,11 @@ describe('formatAdminDate', () => {
     expect(formatAdminDate('1791008678.817257Z')).not.toBe('-');
   });
 });
+
+describe('formatAdminCurrencyCents', () => {
+  test('分转成带两位小数的元', () => {
+    expect(formatAdminCurrencyCents(0)).toBe('¥0.00');
+    expect(formatAdminCurrencyCents(600)).toBe('¥6.00');
+    expect(formatAdminCurrencyCents(1234)).toBe('¥12.34');
+  });
+});

packages/shared/src/components/admin/AdminFormat.ts

@@ -54,6 +54,11 @@ export function formatAdminDateTime(
   }
 }
 
+/** 后台统一的金额展示：分 → `¥12.34`；避免各后台页面各自实现导致格式漂移。 */
+export function formatAdminCurrencyCents(cents: number): string {
+  return `¥${(cents / 100).toFixed(2)}`;
+}
+
 /** 后台统一的日期展示（不含时分秒）：同样接受 `seconds.microsZ` 口径。 */
 export function formatAdminDate(
   value: string | number | Date | null | undefined,

packages/shared/src/components/admin/index.ts

@@ -19,7 +19,11 @@ export type {
   AdminFormRowProps,
 } from './AdminField';
 export { AdminField, AdminFieldGroup, AdminFormRow } from './AdminField';
-export { formatAdminDate, formatAdminDateTime } from './AdminFormat';
+export {
+  formatAdminCurrencyCents,
+  formatAdminDate,
+  formatAdminDateTime,
+} from './AdminFormat';
 export type {
   AdminInfoItemProps,
   AdminInfoListEntry,