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/server/src/attendance/attendance.controller.ts

@@ -13,6 +13,7 @@ import {
   BatchCreateAttendanceDto,
   AttendanceSummaryQueryDto,
   AttendanceCalendarQueryDto,
+  QueryAttendanceRecordsDto,
   QueryDingRawDto,
   MatchDingRecordDto,
 } from './dto/attendance.dto';
@@ -50,6 +51,20 @@ export class AttendanceController {
     return result;
   }
 
+  // ── List attendance records with filters ──
+  @Get('attendance-records')
+  @RequirePermission('attendance:view')
+  findAll(@Query() query: QueryAttendanceRecordsDto) {
+    return this.service.findAll(query);
+  }
+
+  // ── Get distinct classes with attendance records ──
+  @Get('attendance-records/classes')
+  @RequirePermission('attendance:view')
+  getClasses() {
+    return this.service.getClasses();
+  }
+
   // ── Attendance summary ──
   @Get('attendance-records/summary')
   @RequirePermission('attendance:view')