fix(schedules): support editable schedule notes

apps/server/src/schedules/dto/schedule.dto.spec.ts

@@ -0,0 +1,29 @@
+import 'reflect-metadata';
+import { validate } from 'class-validator';
+import { CreateScheduleDto, UpdateScheduleDto } from './schedule.dto';
+
+const createSchedule = (notes: string) =>
+  Object.assign(new CreateScheduleDto(), {
+    classId: 1,
+    classroomId: 2,
+    weekDay: 1,
+    startTime: '09:00',
+    endTime: '10:00',
+    startDate: '2026-07-01',
+    endDate: '2026-07-31',
+    subject: '语文',
+    notes,
+  });
+
+describe('schedule notes validation', () => {
+  it('rejects notes longer than 500 characters when creating', async () => {
+    const errors = await validate(createSchedule('a'.repeat(501)));
+    expect(errors.some((error) => error.property === 'notes')).toBe(true);
+  });
+
+  it('rejects notes longer than 500 characters when updating', async () => {
+    const dto = Object.assign(new UpdateScheduleDto(), { notes: 'a'.repeat(501) });
+    const errors = await validate(dto);
+    expect(errors.some((error) => error.property === 'notes')).toBe(true);
+  });
+});