feat: add student wallet utility billing

apps/server/src/rbac/rbac.service.ts

@@ -51,6 +51,8 @@ const PRESET_PERMISSIONS: Array<{ code: string; name: string; group: string }> =
   { code: 'deposit:edit', name: '编辑押金', group: 'deposit' },
   { code: 'deposit:delete', name: '删除押金', group: 'deposit' },
   { code: 'deposit:refund', name: '直接退还押金', group: 'deposit' },
+  { code: 'wallet:view', name: '查看学生余额', group: 'wallet' },
+  { code: 'wallet:edit', name: '充值和调账', group: 'wallet' },
   { code: 'classroom:view', name: '查看教室', group: 'classroom' },
   { code: 'classroom:create', name: '新增教室', group: 'classroom' },
   { code: 'classroom:edit', name: '编辑教室', group: 'classroom' },
@@ -176,6 +178,7 @@ export const PRESET_ROLES: Array<{
       'expense',
       'bill',
       'deposit',
+      'wallet',
       'dashboard',
       'notification',
       'profile',