fix(attendance): 默认周范围改为中国日期周一起点

generateFromSchedules / getCalendar 原来用本地周一零点转 UTC 日期，
在上海时区会得到前一天的日期，导致默认范围变成周日~周日（8 天）。
改为 dayjs().utcOffset(8) 按中国日期计算，与 getTodayDateOnly 语义一致。

新增测试锁定：默认周 = 本周一~本周日，周日晚上仍归本周，显式传参原样透传。

apps/server/src/attendance/attendance-calendar.service.spec.ts

@@ -0,0 +1,44 @@
+import { AttendanceCalendarService } from './attendance-calendar.service';
+
+describe('AttendanceCalendarService — 默认周起点', () => {
+  function createService() {
+    return new AttendanceCalendarService({} as never, {} as never);
+  }
+
+  afterEach(() => jest.useRealTimers());
+
+  it('未传 weekStart 时默认本周一（中国日期）', async () => {
+    jest.useFakeTimers().setSystemTime(new Date('2026-08-05T10:00:00+08:00')); // 周三
+    const service = createService();
+    const spy = jest
+      .spyOn(service as never, 'buildCalendar' as never)
+      .mockResolvedValue([] as never);
+
+    await service.getCalendar({ classId: 1 } as never);
+
+    expect(spy).toHaveBeenCalledWith(1, '2026-08-03');
+  });
+
+  it('周日晚间仍归入本周一', async () => {
+    jest.useFakeTimers().setSystemTime(new Date('2026-08-09T22:00:00+08:00')); // 周日晚上
+    const service = createService();
+    const spy = jest
+      .spyOn(service as never, 'buildCalendar' as never)
+      .mockResolvedValue([] as never);
+
+    await service.getCalendar({ classId: 1 } as never);
+
+    expect(spy).toHaveBeenCalledWith(1, '2026-08-03');
+  });
+
+  it('传入 weekStart 时原样透传', async () => {
+    const service = createService();
+    const spy = jest
+      .spyOn(service as never, 'buildCalendar' as never)
+      .mockResolvedValue([] as never);
+
+    await service.getCalendar({ classId: 1, weekStart: '2026-08-10' } as never);
+
+    expect(spy).toHaveBeenCalledWith(1, '2026-08-10');
+  });
+});

apps/server/src/attendance/attendance-calendar.service.ts

@@ -18,13 +18,11 @@ export class AttendanceCalendarService {
     const { classId, weekStart } = query;
 
     if (!weekStart) {
-      // Default to the Monday of the current week
+      // Default to the Monday of the current week (China calendar)
-      const now = new Date();
+      const now = dayjs().utcOffset(8);
-      const day = now.getDay();
+      const day = now.day();
-      const diff = day === 0 ? -6 : 1 - day; // Monday offset
+      const monday = now.subtract(day === 0 ? 6 : day - 1, 'day');
-      const monday = new Date(now);
+      const mondayStr = monday.format('YYYY-MM-DD');
-      monday.setDate(now.getDate() + diff);
-      const mondayStr = dayjs(monday).utc().format('YYYY-MM-DD');
 
       return this.buildCalendar(classId, mondayStr);
     }

apps/server/src/attendance/attendance-generation.service.spec.ts

@@ -0,0 +1,65 @@
+import { AttendanceGenerationService } from './attendance-generation.service';
+
+describe('AttendanceGenerationService — 默认周范围', () => {
+  function createService() {
+    return new AttendanceGenerationService(
+      {} as never,
+      {} as never,
+      {} as never,
+      {} as never,
+      {} as never,
+      {} as never,
+      {} as never,
+    );
+  }
+
+  afterEach(() => jest.useRealTimers());
+
+  it('未传 startDate/endDate 时默认生成本周一~本周日（中国日期）', async () => {
+    jest.useFakeTimers().setSystemTime(new Date('2026-08-05T10:00:00+08:00')); // 周三
+    const service = createService();
+    const spy = jest
+      .spyOn(service as never, 'generateAttendanceFromSchedules' as never)
+      .mockResolvedValue({ count: 0, records: [] } as never);
+
+    await service.generateFromSchedules({ classId: 1 } as never);
+
+    expect(spy).toHaveBeenCalledWith({
+      classId: 1,
+      dateFrom: '2026-08-03',
+      dateTo: '2026-08-09',
+    });
+  });
+
+  it('周日晚间仍归入本周（周一起点）', async () => {
+    jest.useFakeTimers().setSystemTime(new Date('2026-08-09T22:00:00+08:00')); // 周日晚上
+    const service = createService();
+    const spy = jest
+      .spyOn(service as never, 'generateAttendanceFromSchedules' as never)
+      .mockResolvedValue({ count: 0, records: [] } as never);
+
+    await service.generateFromSchedules({ classId: 1 } as never);
+
+    expect(spy).toHaveBeenCalledWith({
+      classId: 1,
+      dateFrom: '2026-08-03',
+      dateTo: '2026-08-09',
+    });
+  });
+
+  it('传入 startDate/endDate 时原样透传', async () => {
+    jest.useFakeTimers().setSystemTime(new Date('2026-08-05T10:00:00+08:00'));
+    const service = createService();
+    const spy = jest
+      .spyOn(service as never, 'generateAttendanceFromSchedules' as never)
+      .mockResolvedValue({ count: 0, records: [] } as never);
+
+    await service.generateFromSchedules({ classId: 1, startDate: '2026-08-01', endDate: '2026-08-31' } as never);
+
+    expect(spy).toHaveBeenCalledWith({
+      classId: 1,
+      dateFrom: '2026-08-01',
+      dateTo: '2026-08-31',
+    });
+  });
+});

apps/server/src/attendance/attendance-generation.service.ts

@@ -136,19 +136,14 @@ export class AttendanceGenerationService {
   ): Promise<{ count: number; records: AttendanceRecord[] }> {
     const { classId, startDate, endDate } = dto;
 
-    // Default to current week (Monday–Sunday)
+    // Default to current week (Monday–Sunday), China calendar
-    const now = new Date();
+    const now = dayjs().utcOffset(8);
-    const dayOfWeek = now.getDay();
+    const day = now.day();
-    const mondayOffset = dayOfWeek === 0 ? -6 : 1 - dayOfWeek;
+    const monday = now.subtract(day === 0 ? 6 : day - 1, 'day').startOf('day');
-    const monday = new Date(now);
+    const sunday = monday.add(6, 'day').endOf('day');
-    monday.setDate(now.getDate() + mondayOffset);
-    monday.setHours(0, 0, 0, 0);
-    const sunday = new Date(monday);
-    sunday.setDate(monday.getDate() + 6);
-    sunday.setHours(23, 59, 59, 999);
 
-    const dateFrom = startDate ?? dayjs(monday).utc().format('YYYY-MM-DD');
+    const dateFrom = startDate ?? monday.format('YYYY-MM-DD');
-    const dateTo = endDate ?? dayjs(sunday).utc().format('YYYY-MM-DD');
+    const dateTo = endDate ?? sunday.format('YYYY-MM-DD');
 
     return this.generateAttendanceFromSchedules({
       classId,