feat: DingTalk attendance import + integration config + expense types + UI polish

Server:
- Add DingTalk attendance import service with SSE progress streaming
- Add IntegrationConfig entity & module for multi-tenant DingTalk setup
- Add ExpenseType entity & ExpenseTypesModule
- Add SeedModule for DB initialization
- Add UserDingMapping entity for DingTalk user linkage
- Attendance service: import flow with dedup & student auto-mapping
- Rooms service: time-range overlap queries
- Sync controller/service: DingTalk integration wiring
- Permission guard: refactor to pure re-export
- Campus scope middleware: tenant-aware filtering

Admin UI:
- Attendance page: import UI with progress & result summary
- All pages: tableStyle/tablePagination standardization
- Login page: responsive styling
- Sensitive data: useViewSensitive hook for masked viewing
- Vite config: path aliases, build optimization
- Test infra: vitest config, test utilities

Docs: PRD DingTalk batch 1 & 2 design docs

apps/admin/src/utils/sensitive.ts

@@ -0,0 +1,9 @@
+export const maskPhone = (phone: string): string => {
+  if (!phone || phone.length < 7) return phone || '-';
+  return phone.slice(0, 3) + '****' + phone.slice(-4);
+};
+
+export const maskIdNumber = (id: string): string => {
+  if (!id || id.length < 8) return id || '-';
+  return id.slice(0, 3) + '***********' + id.slice(-4);
+};