feat: attendance frontend page + backend list/classes endpoints

- Create AttendancePage with filter bar, table, calendar view toggle, batch add modal
- Register /attendance route with PermissionRoute (attendance:view)
- Add menu item in MainLayout with CheckCircleOutlined icon
- Add GET /attendance-records with pagination and filters
- Add GET /attendance-records/classes for class dropdown
- Add source column to AttendanceRecord entity (default: manual)
- Frontend tsc --noEmit: clean; backend: only pre-existing test errors

apps/admin/src/layouts/MainLayout.tsx

@@ -22,6 +22,7 @@ import {
   CalendarOutlined,
   SafetyOutlined,
   KeyOutlined,
+  CheckCircleOutlined,
 } from '@ant-design/icons';
 import { usePermission } from '../hooks/usePermission';
 
@@ -77,6 +78,7 @@ const allMenuItems: MenuItemType[] = [
       { key: '/tenants', icon: <TagsOutlined />, label: '租赁方', permission: 'tenant:view' },
     ],
   },
+  { key: '/attendance', icon: <CheckCircleOutlined />, label: '考勤管理', permission: 'attendance:view' },
   { key: '/schedules', icon: <CalendarOutlined />, label: '排课管理', permission: 'schedule:view' },
   { key: '/operation-logs', icon: <AuditOutlined />, label: '操作日志', permission: 'log:view' },
   { key: '/roles', icon: <SafetyOutlined />, label: '角色管理', permission: 'role:view' },