feat: 新增客服备用金台账与后台用户中文显示名

- 新增备用金账户、流水、支出、对账与权限
- 后台用户支持中文显示名并同步备用金姓名
- 审计、登录记录、任务及工单操作人优先展示中文名
- 补充备用金与人工支出方案文档

apps/backend/src/routes/admin.ts

@@ -6,6 +6,7 @@ import dashboardRouter from './admin/dashboard.js'
 import devMockRouter from './admin/dev-mock.js'
 import douyinMashidaRouter from './admin/douyin-mashida.js'
 import financeRouter from './admin/finance.js'
+import fundRouter from './admin/fund.js'
 import filesRouter from './admin/files.js'
 import kuaishouIndustryRouter from './admin/kuaishou-industry.js'
 import ordersRouter from './admin/orders.js'
@@ -26,6 +27,7 @@ router.use(requireAdminSession)
 router.use(filesRouter)
 router.use(dashboardRouter)
 router.use(financeRouter)
+router.use(fundRouter)
 router.use(usersRouter)
 router.use(rbacRouter)
 router.use(auditLogsRouter)