refactor(server): remove Department/UserDepartment entities, CampusScope, and departmentId from all entities

- Delete department.entity.ts, user-department.entity.ts
- Remove Department/UserDepartment from entities/index.ts
- Remove departmentId column from 18 entities (AttendanceRecord, ArchiveAttachment, Bill, ClassSchedule, Classroom, ClassroomRental, Deposit, DepositInstallment, ExamScore, LearningRecord, Occupancy, PersonalExpense, ResultArchive, Room, RoomExpense, Student, StudentEnrollment, StudentProfile, StudentReport)
- Remove departments/ module entirely
- Delete campus-scope.ts, campus-scope.middleware.ts (request-utils.ts kept — it's just IP extraction)
- Simplify common.module.ts to empty module
- Remove CampusScopeMiddleware from app.module.ts
- Remove all CampusScope injections and filter calls across all services
- Remove departmentId from all DTOs and controllers
- Simplify dingtalk/wecom sync to only sync users (no dept table)
- Update seed module to remove department seeding
- Clean frontend compilation

apps/server/src/occupancies/occupancies.service.ts

@@ -17,7 +17,7 @@ import { Locker } from '../entities/locker.entity';
 import { Deposit } from '../entities/deposit.entity';
 import { CheckInDto, CheckOutDto, TransferRoomDto } from './dto/occupancy.dto';
 import { RoomsService } from '../rooms/rooms.service';
-import { CampusScope } from '../common/campus-scope';
+
 
 @Injectable()
 export class OccupanciesService {
@@ -29,7 +29,6 @@ export class OccupanciesService {
     @InjectRepository(Bed) private bedRepo: Repository<Bed>,
     @InjectRepository(Locker) private lockerRepo: Repository<Locker>,
     private dataSource: DataSource,
-    private readonly scope: CampusScope,
   ) {}
 
   async findAll(query?: { roomId?: number; studentId?: number; active?: boolean }) {
@@ -40,10 +39,6 @@ export class OccupanciesService {
       .leftJoinAndSelect('o.bed', 'bed')
       .leftJoinAndSelect('o.locker', 'locker')
       .orderBy('o.checkInDate', 'DESC');
-    const scopeIds = await this.scope.getScopeDepartmentIds();
-    if (scopeIds) {
-      qb.andWhere('o.departmentId IN (:...scopeIds)', { scopeIds });
-    }
     if (query?.roomId) qb.andWhere('o.roomId = :roomId', { roomId: query.roomId });
     if (query?.studentId) qb.andWhere('o.studentId = :studentId', { studentId: query.studentId });
     if (query?.active) qb.andWhere('o.checkOutDate IS NULL');
@@ -97,7 +92,6 @@ export class OccupanciesService {
       bedId: dto.bedId,
       lockerId: dto.lockerId,
     });
-    occ.departmentId = room.departmentId;
     const saved = await this.repo.save(occ);
 
     // 更新床位/柜子状态