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/classroom-rentals/classroom-rentals.service.ts

@@ -11,7 +11,7 @@ import { Classroom } from '../entities/classroom.entity';
 import { Tenant } from '../entities/tenant.entity';
 import { ClassSchedule } from '../entities/class-schedule.entity';
 import { CreateRentalDto, UpdateRentalDto } from './dto/rental.dto';
-import { CampusScope } from '../common/campus-scope';
+
 import * as path from 'path';
 import * as fs from 'fs';
 
@@ -37,7 +37,6 @@ export class ClassroomRentalsService {
     @InjectRepository(Classroom) private classroomRepo: Repository<Classroom>,
     @InjectRepository(Tenant) private tenantRepo: Repository<Tenant>,
     @InjectRepository(ClassSchedule) private scheduleRepo: Repository<ClassSchedule>,
-    private readonly scope: CampusScope,
   ) {}
 
   get uploadDir(): string {
@@ -57,13 +56,11 @@ export class ClassroomRentalsService {
     month?: string;
     includeEnded?: boolean;
   }) {
-    const scopeIds = await this.scope.getScopeDepartmentIds();
     const qb = this.repo
       .createQueryBuilder('r')
       .leftJoinAndSelect('r.classroom', 'classroom')
       .leftJoinAndSelect('r.tenant', 'tenant')
       .orderBy('r.startDate', 'DESC');
-    if (scopeIds) qb.andWhere('r.departmentId IN (:...scopeIds)', { scopeIds });
     if (query?.classroomId) qb.andWhere('r.classroomId = :cid', { cid: query.classroomId });
     if (query?.tenantId) qb.andWhere('r.tenantId = :tid', { tid: query.tenantId });
     if (query?.month) {
@@ -142,9 +139,7 @@ export class ClassroomRentalsService {
       });
     }
     const rental = this.repo.create({ ...dto, createdBy: userId, status: 'active' });
-    rental.departmentId = classroom.departmentId;
     const saved = await this.repo.save(rental);
-    await this.syncScheduleFromRental(saved, tenant.name);
     return saved;
   }
 
@@ -221,7 +216,6 @@ export class ClassroomRentalsService {
       rentalId: rental.id,
       status: 'active',
       notes: rental.notes,
-      departmentId: rental.departmentId,
     };
     if (schedule) {
       await this.scheduleRepo.update(schedule.id, data);