diff --git a/apps/admin/src/hooks/useNotifications.ts b/apps/admin/src/hooks/useNotifications.ts
deleted file mode 100644
index 34aca03..0000000
--- a/apps/admin/src/hooks/useNotifications.ts
+++ /dev/null
@@ -1,78 +0,0 @@
-import { useState, useEffect, useCallback } from 'react';
-import api from '../api';
-
-interface Notification {
-  id: number;
-  type: string;
-  title: string;
-  content: string;
-  link: string | null;
-  createdAt: string;
-}
-
-export function useNotifications() {
-  const [unreadCount, setUnreadCount] = useState(0);
-  const [latestNotification, setLatestNotification] = useState<Notification | null>(null);
-
-  const fetchUnreadCount = useCallback(async () => {
-    try {
-      const data = await api.get('/notifications/unread-count') as unknown as { count: number };
-      setUnreadCount(data.count);
-    } catch {
-      // silent
-    }
-  }, []);
-
-  useEffect(() => {
-    fetchUnreadCount();
-
-    const token = localStorage.getItem('token');
-    if (!token) return;
-
-    const es = new EventSource(`/api/notifications/stream?token=${encodeURIComponent(token)}`);
-
-    es.onmessage = (event) => {
-      try {
-        const notification = JSON.parse(event.data) as Notification;
-        setUnreadCount((c) => c + 1);
-        setLatestNotification(notification);
-      } catch {
-        // ignore parse errors
-      }
-    };
-
-    const pollRef = { current: undefined as number | undefined };
-
-    es.onerror = () => {
-      es.close();
-      pollRef.current = setInterval(() => {
-        fetchUnreadCount();
-      }, 60_000);
-    };
-
-    return () => {
-      es.close();
-      if (pollRef.current !== undefined) clearInterval(pollRef.current);
-    };
-  }, [fetchUnreadCount]);
-
-  const markAsRead = useCallback(async (id: number) => {
-    try {
-      await api.put(`/notifications/${id}/read`);
-      setUnreadCount((c) => Math.max(0, c - 1));
-    } catch {
-      // silent
-    }
-  }, []);
-
-  const markAllAsRead = useCallback(async () => {
-    try {
-      await api.put('/notifications/read-all');
-      setUnreadCount(0);
-    } catch {
-      // silent
-    }
-  }, []);
-
-  return { unreadCount, latestNotification, markAsRead, markAllAsRead };
-}
diff --git a/apps/server/src/app.controller.spec.ts b/apps/server/src/app.controller.spec.ts
deleted file mode 100644
index d22f389..0000000
--- a/apps/server/src/app.controller.spec.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { AppController } from './app.controller';
-import { AppService } from './app.service';
-
-describe('AppController', () => {
-  let appController: AppController;
-
-  beforeEach(async () => {
-    const app: TestingModule = await Test.createTestingModule({
-      controllers: [AppController],
-      providers: [AppService],
-    }).compile();
-
-    appController = app.get<AppController>(AppController);
-  });
-
-  describe('root', () => {
-    it('should return "Hello World!"', () => {
-      expect(appController.getHello()).toBe('Hello World!');
-    });
-  });
-});
diff --git a/apps/server/src/app.controller.ts b/apps/server/src/app.controller.ts
deleted file mode 100644
index cce879e..0000000
--- a/apps/server/src/app.controller.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-import { Controller, Get } from '@nestjs/common';
-import { AppService } from './app.service';
-
-@Controller()
-export class AppController {
-  constructor(private readonly appService: AppService) {}
-
-  @Get()
-  getHello(): string {
-    return this.appService.getHello();
-  }
-}
diff --git a/apps/server/src/app.module.ts b/apps/server/src/app.module.ts
index 2f51d35..fc2a7ec 100644
--- a/apps/server/src/app.module.ts
+++ b/apps/server/src/app.module.ts
@@ -61,7 +61,6 @@ import { SchedulesModule } from './schedules/schedules.module';
 import { ClassroomRentalsModule } from './classroom-rentals/classroom-rentals.module';
 import { SyncModule } from './sync/sync.module';
 import { NotificationsModule } from './notifications/notifications.module';
-import { CommonModule } from './common/common.module';
 import { ArchiveModule } from './archive/archive.module';
 import { ExpenseTypesModule } from './expense-types/expense-types.module';
 
@@ -161,7 +160,6 @@ import { IntegrationConfigModule } from './integration/config/config.module';
     ClassroomRentalsModule,
     SyncModule,
     NotificationsModule,
-    CommonModule,
     ArchiveModule,
     IntegrationConfigModule,
     ExpenseTypesModule,
diff --git a/apps/server/src/app.service.ts b/apps/server/src/app.service.ts
deleted file mode 100644
index 927d7cc..0000000
--- a/apps/server/src/app.service.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-import { Injectable } from '@nestjs/common';
-
-@Injectable()
-export class AppService {
-  getHello(): string {
-    return 'Hello World!';
-  }
-}
diff --git a/apps/server/src/archive/archive.module.ts b/apps/server/src/archive/archive.module.ts
index 2d0e463..d755a89 100644
--- a/apps/server/src/archive/archive.module.ts
+++ b/apps/server/src/archive/archive.module.ts
@@ -8,7 +8,6 @@ import { LearningRecord } from '../entities/learning-record.entity';
 import { ResultArchive } from '../entities/result-archive.entity';
 import { ArchiveAttachment } from '../entities/archive-attachment.entity';
 import { AttendanceRecord } from '../entities/attendance-record.entity';
-import { CommonModule } from '../common/common.module';
 import { NotificationsModule } from '../notifications/notifications.module';
 import { ArchiveService } from './archive.service';
 import { ArchiveReportService } from './archive-report.service';
@@ -26,7 +25,6 @@ import { ArchiveController } from './archive.controller';
       ArchiveAttachment,
       AttendanceRecord,
     ]),
-    CommonModule,
     NotificationsModule,
   ],
   controllers: [ArchiveController],
diff --git a/apps/server/src/attendance/attendance.module.ts b/apps/server/src/attendance/attendance.module.ts
index eeccbe4..847ba0d 100644
--- a/apps/server/src/attendance/attendance.module.ts
+++ b/apps/server/src/attendance/attendance.module.ts
@@ -5,14 +5,12 @@ import { AttendanceService } from './attendance.service';
 import { AttendanceImportService } from './attendance-import.service';
 import { AttendanceController } from './attendance.controller';
 import { OperationLogsModule } from '../operation-logs/operation-logs.module';
-import { CommonModule } from '../common/common.module';
 import { IntegrationModule } from '../integration/integration.module';
 
 @Module({
   imports: [
     TypeOrmModule.forFeature([AttendanceRecord, DingAttendanceRaw, Student, Class, ClassSchedule, ClassStudent, StudentDingMapping]),
     OperationLogsModule,
-    CommonModule,
     IntegrationModule,
   ],
   controllers: [AttendanceController],
diff --git a/apps/server/src/auth/dto/auth.dto.ts b/apps/server/src/auth/dto/auth.dto.ts
index d9c1308..b32a24b 100644
--- a/apps/server/src/auth/dto/auth.dto.ts
+++ b/apps/server/src/auth/dto/auth.dto.ts
@@ -8,15 +8,3 @@ export class LoginDto {
   @MinLength(4)
   password: string;
 }
-
-export class RegisterDto {
-  @IsString()
-  username: string;
-
-  @IsString()
-  @MinLength(4)
-  password: string;
-
-  @IsString()
-  name: string;
-}
diff --git a/apps/server/src/bills/bills.module.ts b/apps/server/src/bills/bills.module.ts
index 239a7dc..14dfd6c 100644
--- a/apps/server/src/bills/bills.module.ts
+++ b/apps/server/src/bills/bills.module.ts
@@ -1,6 +1,5 @@
 import { Module } from '@nestjs/common';
 import { NotificationsModule } from '../notifications/notifications.module';
-import { CommonModule } from '../common/common.module';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { Bill } from '../entities/bill.entity';
 import { BillItem } from '../entities/bill-item.entity';
@@ -27,7 +26,6 @@ import { BillsController } from './bills.controller';
       Student,
     ]),
     NotificationsModule,
-    CommonModule,
   ],
   controllers: [BillsController],
   providers: [BillsService, BillsExportService],
diff --git a/apps/server/src/classes/classes.module.ts b/apps/server/src/classes/classes.module.ts
index 8fc4e2e..a4d0ee6 100644
--- a/apps/server/src/classes/classes.module.ts
+++ b/apps/server/src/classes/classes.module.ts
@@ -1,6 +1,5 @@
 import { Module } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
-import { CommonModule } from '../common/common.module';
 import { Class, ClassStudent, ClassTeacher, ClassSchedule, AttendanceRecord, Student, StudentDingMapping } from '../entities';
 import { ClassesService } from './classes.service';
 import { ClassesController } from './classes.controller';
@@ -8,7 +7,7 @@ import { OperationLogsModule } from '../operation-logs/operation-logs.module';
 import { NotificationsModule } from '../notifications/notifications.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([Class, ClassStudent, ClassTeacher, ClassSchedule, AttendanceRecord, Student, StudentDingMapping]), OperationLogsModule, NotificationsModule, CommonModule],
+  imports: [TypeOrmModule.forFeature([Class, ClassStudent, ClassTeacher, ClassSchedule, AttendanceRecord, Student, StudentDingMapping]), OperationLogsModule, NotificationsModule],
   controllers: [ClassesController],
   providers: [ClassesService],
   exports: [ClassesService],
diff --git a/apps/server/src/classroom-rentals/classroom-rentals.module.ts b/apps/server/src/classroom-rentals/classroom-rentals.module.ts
index 1319e22..cd6e53c 100644
--- a/apps/server/src/classroom-rentals/classroom-rentals.module.ts
+++ b/apps/server/src/classroom-rentals/classroom-rentals.module.ts
@@ -7,10 +7,9 @@ import { ClassSchedule } from '../entities/class-schedule.entity';
 import { ClassroomRentalsService } from './classroom-rentals.service';
 import { ClassroomRentalsController } from './classroom-rentals.controller';
 import { OperationLogsModule } from '../operation-logs/operation-logs.module';
-import { CommonModule } from '../common/common.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([ClassroomRental, Classroom, Tenant, ClassSchedule]), OperationLogsModule, CommonModule],
+  imports: [TypeOrmModule.forFeature([ClassroomRental, Classroom, Tenant, ClassSchedule]), OperationLogsModule],
   controllers: [ClassroomRentalsController],
   providers: [ClassroomRentalsService],
   exports: [ClassroomRentalsService],
diff --git a/apps/server/src/classrooms/classrooms.module.ts b/apps/server/src/classrooms/classrooms.module.ts
index e77f72d..888edc4 100644
--- a/apps/server/src/classrooms/classrooms.module.ts
+++ b/apps/server/src/classrooms/classrooms.module.ts
@@ -6,10 +6,9 @@ import { ClassSchedule } from '../entities/class-schedule.entity';
 import { ClassroomsService } from './classrooms.service';
 import { ClassroomsController } from './classrooms.controller';
 import { OperationLogsModule } from '../operation-logs/operation-logs.module';
-import { CommonModule } from '../common/common.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([Classroom, ClassroomRental, ClassSchedule]), OperationLogsModule, CommonModule],
+  imports: [TypeOrmModule.forFeature([Classroom, ClassroomRental, ClassSchedule]), OperationLogsModule],
   controllers: [ClassroomsController],
   providers: [ClassroomsService],
   exports: [ClassroomsService],
diff --git a/apps/server/src/common/common.module.ts b/apps/server/src/common/common.module.ts
deleted file mode 100644
index ac198ba..0000000
--- a/apps/server/src/common/common.module.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-import { Module } from '@nestjs/common';
-
-@Module({})
-export class CommonModule {}
diff --git a/apps/server/src/dashboard/dashboard.module.ts b/apps/server/src/dashboard/dashboard.module.ts
index 26da52f..b864386 100644
--- a/apps/server/src/dashboard/dashboard.module.ts
+++ b/apps/server/src/dashboard/dashboard.module.ts
@@ -13,11 +13,10 @@ import { Deposit } from '../entities/deposit.entity';
 import { ClassroomRental } from '../entities/classroom-rental.entity';
 import { ClassTeacher } from '../entities/class-teacher.entity';
 import { DashboardService } from './dashboard.service';
-import { CommonModule } from '../common/common.module';
 import { DashboardController } from './dashboard.controller';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([Room, Student, Occupancy, Bill, RoomExpense, Classroom, ClassSchedule, AttendanceRecord, Class, Deposit, ClassroomRental, ClassTeacher]), CommonModule],
+  imports: [TypeOrmModule.forFeature([Room, Student, Occupancy, Bill, RoomExpense, Classroom, ClassSchedule, AttendanceRecord, Class, Deposit, ClassroomRental, ClassTeacher])],
   controllers: [DashboardController],
   providers: [DashboardService],
 })
diff --git a/apps/server/src/deposits/deposits.module.ts b/apps/server/src/deposits/deposits.module.ts
index f7a9f6c..5c49211 100644
--- a/apps/server/src/deposits/deposits.module.ts
+++ b/apps/server/src/deposits/deposits.module.ts
@@ -4,13 +4,12 @@ import { Student } from '../entities/student.entity';
 import { Deposit } from '../entities/deposit.entity';
 import { DepositInstallment } from '../entities/deposit-installment.entity';
 import { DepositsService } from './deposits.service';
-import { CommonModule } from '../common/common.module';
 import { DepositsController } from './deposits.controller';
 import { OperationLogsModule } from '../operation-logs/operation-logs.module';
 import { NotificationsModule } from '../notifications/notifications.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([Deposit, DepositInstallment, Student]), OperationLogsModule, NotificationsModule, CommonModule],
+  imports: [TypeOrmModule.forFeature([Deposit, DepositInstallment, Student]), OperationLogsModule, NotificationsModule],
   controllers: [DepositsController],
   providers: [DepositsService],
   exports: [DepositsService],
diff --git a/apps/server/src/deposits/dto/deposit.dto.ts b/apps/server/src/deposits/dto/deposit.dto.ts
index 2dd48b9..1b140b6 100644
--- a/apps/server/src/deposits/dto/deposit.dto.ts
+++ b/apps/server/src/deposits/dto/deposit.dto.ts
@@ -24,15 +24,6 @@ export class CreateInstallmentDto {
   dueDate: string;
 }
 
-export class UpdateInstallmentDto {
-  @IsOptional()
-  @IsString()
-  paidDate?: string;
-
-  @IsOptional()
-  @IsString()
-  status?: string;
-}
 
 
 export class RefundDepositDto {
@@ -57,9 +48,3 @@ export class CreateDepositWithInstallmentsDto extends CreateDepositDto {
   @Type(() => CreateInstallmentDto)
   installments?: CreateInstallmentDto[];
 }
-
-export class ApproveRefundDto {
-  @IsOptional()
-  @IsString()
-  notes?: string;
-}
diff --git a/apps/server/src/entities/index.ts b/apps/server/src/entities/index.ts
index c7e0b7e..388dda5 100644
--- a/apps/server/src/entities/index.ts
+++ b/apps/server/src/entities/index.ts
@@ -32,5 +32,4 @@ export { ExamScore } from './exam-score.entity';
 export { LearningRecord } from './learning-record.entity';
 export { ResultArchive } from './result-archive.entity';
 export { ArchiveAttachment } from './archive-attachment.entity';
-export { StudentReport } from './student-report.entity';
 export { StudentDingMapping } from './student-ding-mapping.entity';
diff --git a/apps/server/src/entities/student-report.entity.ts b/apps/server/src/entities/student-report.entity.ts
deleted file mode 100644
index e741c76..0000000
--- a/apps/server/src/entities/student-report.entity.ts
+++ /dev/null
@@ -1,42 +0,0 @@
-import {
-  Entity,
-  PrimaryGeneratedColumn,
-  Column,
-  CreateDateColumn,
-  UpdateDateColumn,
-  ManyToOne,
-  JoinColumn,
-} from 'typeorm';
-import { Student } from './student.entity';
-
-@Entity('student_reports')
-export class StudentReport {
-  @PrimaryGeneratedColumn()
-  id: number;
-
-  @Column({ name: 'student_id', type: 'integer' })
-  studentId: number;
-
-  @ManyToOne(() => Student, { eager: true })
-  @JoinColumn({ name: 'student_id' })
-  student: Student;
-
-  @Column({ name: 'snapshot_data', type: 'simple-json', nullable: true })
-  snapshotData: Record<string, unknown>;
-
-  @Column({ name: 'html_content', type: 'text', nullable: true })
-  htmlContent: string;
-
-  @Column({ name: 'pdf_path', length: 500, nullable: true })
-  pdfPath: string;
-
-  @Column({ name: 'generated_at', type: 'datetime', nullable: true })
-  generatedAt: Date;
-
-
-  @CreateDateColumn({ name: 'created_at' })
-  createdAt: Date;
-
-  @UpdateDateColumn({ name: 'updated_at' })
-  updatedAt: Date;
-}
diff --git a/apps/server/src/expenses/expenses.module.ts b/apps/server/src/expenses/expenses.module.ts
index 3e172f6..2a71e90 100644
--- a/apps/server/src/expenses/expenses.module.ts
+++ b/apps/server/src/expenses/expenses.module.ts
@@ -1,6 +1,5 @@
 import { Module } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
-import { CommonModule } from '../common/common.module';
 import { RoomExpense } from '../entities/room-expense.entity';
 import { PersonalExpense } from '../entities/personal-expense.entity';
 import { Room } from '../entities/room.entity';
@@ -13,7 +12,6 @@ import { OperationLogsModule } from '../operation-logs/operation-logs.module';
   imports: [
     TypeOrmModule.forFeature([RoomExpense, PersonalExpense, Room, Student]),
     OperationLogsModule,
-    CommonModule,
   ],
   controllers: [ExpensesController],
   providers: [ExpensesService],
diff --git a/apps/server/src/occupancies/occupancies.module.ts b/apps/server/src/occupancies/occupancies.module.ts
index a8f1bb5..e812e8c 100644
--- a/apps/server/src/occupancies/occupancies.module.ts
+++ b/apps/server/src/occupancies/occupancies.module.ts
@@ -10,10 +10,9 @@ import { OccupanciesService } from './occupancies.service';
 import { OccupanciesController } from './occupancies.controller';
 import { OperationLogsModule } from '../operation-logs/operation-logs.module';
 import { NotificationsModule } from '../notifications/notifications.module';
-import { CommonModule } from '../common/common.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([Occupancy, Room, Student, Deposit, Bed, Locker]), OperationLogsModule, NotificationsModule, CommonModule],
+  imports: [TypeOrmModule.forFeature([Occupancy, Room, Student, Deposit, Bed, Locker]), OperationLogsModule, NotificationsModule],
   controllers: [OccupanciesController],
   providers: [OccupanciesService],
   exports: [OccupanciesService],
diff --git a/apps/server/src/rooms/rooms.module.ts b/apps/server/src/rooms/rooms.module.ts
index b5959c6..5ce2996 100644
--- a/apps/server/src/rooms/rooms.module.ts
+++ b/apps/server/src/rooms/rooms.module.ts
@@ -8,10 +8,9 @@ import { Locker } from '../entities/locker.entity';
 import { RoomsService } from './rooms.service';
 import { RoomsController } from './rooms.controller';
 import { OperationLogsModule } from '../operation-logs/operation-logs.module';
-import { CommonModule } from '../common/common.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([Room, Occupancy, RoomExpense, Bed, Locker]), OperationLogsModule, CommonModule],
+  imports: [TypeOrmModule.forFeature([Room, Occupancy, RoomExpense, Bed, Locker]), OperationLogsModule],
   controllers: [RoomsController],
   providers: [RoomsService],
   exports: [RoomsService],
diff --git a/apps/server/src/schedules/schedules.module.ts b/apps/server/src/schedules/schedules.module.ts
index a3a4624..0b0c7cb 100644
--- a/apps/server/src/schedules/schedules.module.ts
+++ b/apps/server/src/schedules/schedules.module.ts
@@ -5,10 +5,9 @@ import { SchedulesService } from './schedules.service';
 import { SchedulesController } from './schedules.controller';
 import { OperationLogsModule } from '../operation-logs/operation-logs.module';
 import { NotificationsModule } from '../notifications/notifications.module';
-import { CommonModule } from '../common/common.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([ClassSchedule, Class, ClassroomRental]), OperationLogsModule, NotificationsModule, CommonModule],
+  imports: [TypeOrmModule.forFeature([ClassSchedule, Class, ClassroomRental]), OperationLogsModule, NotificationsModule],
   controllers: [SchedulesController],
   providers: [SchedulesService],
   exports: [SchedulesService],
diff --git a/apps/server/src/seed/seed-dev.service.ts b/apps/server/src/seed/seed-dev.service.ts
deleted file mode 100644
index 1b62b2a..0000000
--- a/apps/server/src/seed/seed-dev.service.ts
+++ /dev/null
@@ -1,768 +0,0 @@
-import { Injectable, Logger } from '@nestjs/common';
-import { InjectRepository } from '@nestjs/typeorm';
-import { Repository } from 'typeorm';
-import * as bcrypt from 'bcryptjs';
-import {
-  User, Role, Permission,
-  Tenant, Student, Room, Classroom, Occupancy,
-  RoomExpense, ExpenseType, Class,
-  ClassStudent, ClassTeacher, ClassSchedule,
-  Bill, BillItem, Deposit,
-  AttendanceRecord, ClassroomRental,
-  StudentProfile, StudentEnrollment, ExamScore,
-  LearningRecord, TeacherRoleType,
-  ClassType, ClassStatus, ScheduleType,
-} from '../entities';
-
-// ── helpers ──────────────────────────────────────────────
-
-function randInt(min: number, max: number): number {
-  return Math.floor(Math.random() * (max - min + 1)) + min;
-}
-
-function pick<T>(arr: T[]): T {
-  return arr[Math.floor(Math.random() * arr.length)];
-}
-
-// ── service ──────────────────────────────────────────────
-
-@Injectable()
-export class SeedDevService {
-  private readonly logger = new Logger(SeedDevService.name);
-
-  private cachedStudents: Student[] = [];
-  private cachedRooms: Room[] = [];
-  private cachedClassrooms: Classroom[] = [];
-  private cachedUsers: User[] = [];
-  private cachedClasses: Class[] = [];
-  private cachedTenants: Tenant[] = [];
-
-  constructor(
-    @InjectRepository(Permission) private permRepo: Repository<Permission>,
-    @InjectRepository(Role) private roleRepo: Repository<Role>,
-    @InjectRepository(User) private userRepo: Repository<User>,
-    @InjectRepository(Tenant) private tenantRepo: Repository<Tenant>,
-    @InjectRepository(Student) private studentRepo: Repository<Student>,
-    @InjectRepository(Room) private roomRepo: Repository<Room>,
-    @InjectRepository(Classroom) private classroomRepo: Repository<Classroom>,
-    @InjectRepository(Occupancy) private occupancyRepo: Repository<Occupancy>,
-    @InjectRepository(RoomExpense) private roomExpenseRepo: Repository<RoomExpense>,
-    @InjectRepository(ExpenseType) private expenseTypeRepo: Repository<ExpenseType>,
-    @InjectRepository(Class) private classRepo: Repository<Class>,
-    @InjectRepository(ClassStudent) private classStudentRepo: Repository<ClassStudent>,
-    @InjectRepository(ClassTeacher) private classTeacherRepo: Repository<ClassTeacher>,
-    @InjectRepository(ClassSchedule) private scheduleRepo: Repository<ClassSchedule>,
-    @InjectRepository(Bill) private billRepo: Repository<Bill>,
-    @InjectRepository(BillItem) private billItemRepo: Repository<BillItem>,
-    @InjectRepository(Deposit) private depositRepo: Repository<Deposit>,
-    @InjectRepository(AttendanceRecord) private attendanceRepo: Repository<AttendanceRecord>,
-    @InjectRepository(ClassroomRental) private rentalRepo: Repository<ClassroomRental>,
-    @InjectRepository(StudentProfile) private profileRepo: Repository<StudentProfile>,
-    @InjectRepository(StudentEnrollment) private enrollmentRepo: Repository<StudentEnrollment>,
-    @InjectRepository(ExamScore) private examScoreRepo: Repository<ExamScore>,
-    @InjectRepository(LearningRecord) private learningRecordRepo: Repository<LearningRecord>,
-  ) {}
-
-  async getUserCount(): Promise<number> {
-    return this.userRepo.count();
-  }
-
-  async getStudentCount(): Promise<number> {
-    return this.studentRepo.count();
-  }
-
-  async seed(): Promise<void> {
-    // ═══════════════════ Layer 0 ══════════════════════════
-    await this.seedPermissions();
-    await this.seedExpenseTypes();
-
-
-    // ═══════════════════ Layer 1 ══════════════════════════
-    await this.seedRoles();
-    await this.seedUsers();
-
-    // ═══════════════════ Layer 2 ══════════════════════════
-    await this.seedTenants();
-    await this.seedRooms();
-    await this.seedClassrooms();
-    await this.seedStudents();
-
-    // ═══════════════════ Layer 3 ══════════════════════════
-    await this.seedClasses();
-    await this.seedOccupancies();
-    await this.seedSchedules();
-
-    // ═══════════════════ Layer 4 ══════════════════════════
-    await this.seedRoomExpenses();
-    await this.seedDeposits();
-    await this.seedBills();
-
-    // ═══════════════════ Layer 5 ══════════════════════════
-    await this.seedAttendance();
-    await this.seedClassroomRentals();
-
-    // ═══════════════════ Layer 6 ══════════════════════════
-    await this.seedProfiles();
-    await this.seedEnrollments();
-    await this.seedExamScores();
-    await this.seedLearningRecords();
-
-    this.logger.log('=== Mock data seeding complete ===');
-  }
-
-  // ── 0a: permissions ───────────────────────────────────
-
-  private async seedPermissions(): Promise<void> {
-    const existing = await this.permRepo.count();
-    if (existing > 0) { this.logger.log('  ⏭ permissions exist, skip'); return; }
-
-    const groups: Record<string, string[]> = {
-      student: ['view', 'create', 'edit', 'delete', 'import', 'export'],
-      room: ['view', 'create', 'edit', 'delete'],
-      occupancy: ['view', 'checkin', 'checkout', 'transfer'],
-      class: ['view', 'create', 'edit', 'delete'],
-      schedule: ['view', 'create', 'edit', 'delete'],
-      classroom: ['view', 'create', 'edit', 'delete'],
-      expense: ['view', 'create', 'edit', 'delete'],
-      bill: ['view', 'generate', 'edit'],
-      deposit: ['view', 'create', 'refund'],
-      tenant: ['view', 'create', 'edit', 'delete'],
-      dashboard: ['view'],
-      rbac: ['view', 'manage'],
-    };
-
-    const nameMap: Record<string, string> = {
-      student: '学生', room: '宿舍', occupancy: '入住', class: '班级',
-      schedule: '排课', classroom: '教室', expense: '费用', bill: '账单',
-      deposit: '押金', tenant: '租赁方', dashboard: '数据面板', rbac: '用户角色',
-    };
-    const actionMap: Record<string, string> = {
-      view: '查看', create: '新增', edit: '编辑', delete: '删除',
-      import: '导入', export: '导出', checkin: '办理入住', checkout: '办理退房',
-      transfer: '调寝', generate: '生成', refund: '退还', manage: '管理',
-    };
-
-    const perms: Array<{ code: string; name: string; group: string }> = [];
-    for (const [group, actions] of Object.entries(groups)) {
-      for (const action of actions) {
-        perms.push({
-          code: `${group}:${action}`,
-          name: `${actionMap[action]}${nameMap[group]}`,
-          group,
-        });
-      }
-    }
-    await this.permRepo.save(perms);
-    this.logger.log(`  ✓ ${perms.length} permissions`);
-  }
-
-  // ── 0b: expense types ────────────────────────────────
-
-  private async seedExpenseTypes(): Promise<void> {
-    const types: Array<{ code: string; name: string; category: string; sortOrder: number }> = [
-      { code: 'electricity', name: '电费', category: 'room', sortOrder: 1 },
-      { code: 'water', name: '水费', category: 'room', sortOrder: 2 },
-      { code: 'gas', name: '燃气费', category: 'room', sortOrder: 3 },
-      { code: 'property', name: '物业费', category: 'room', sortOrder: 4 },
-      { code: 'internet', name: '网费', category: 'personal', sortOrder: 5 },
-      { code: 'cleaning', name: '保洁费', category: 'personal', sortOrder: 6 },
-    ];
-    await this.expenseTypeRepo.save(types);
-    this.logger.log(`  ✓ ${types.length} expense types`);
-  }
-
-
-
-  // ── 1a: roles ────────────────────────────────────────
-
-  private async seedRoles(): Promise<void> {
-    const existing = await this.roleRepo.count();
-    if (existing > 0) { this.logger.log('  ⏭ roles exist, skip'); return; }
-
-    const allPerms = await this.permRepo.find();
-    const saPerms = allPerms;
-    const adminPerms = allPerms.filter((p) => p.group !== 'rbac');
-    const dormPerms = allPerms.filter((p) =>
-      ['room', 'occupancy', 'deposit', 'expense', 'bill', 'dashboard', 'student'].includes(p.group),
-    );
-    const teacherPerms = allPerms.filter((p) =>
-      ['student', 'class', 'schedule', 'classroom', 'dashboard'].includes(p.group),
-    );
-    const financePerms = allPerms.filter((p) =>
-      ['expense', 'bill', 'deposit', 'tenant', 'dashboard'].includes(p.group),
-    );
-    const operatorPerms = allPerms.filter((p) => p.group !== 'rbac');
-
-    const roles = [
-      { name: '超级管理员', description: '全部权限', isSystem: true, status: 1, permissions: saPerms },
-      { name: '管理员', description: '除RBAC外全部权限', isSystem: true, status: 1, permissions: adminPerms },
-      { name: '宿管', description: '宿舍/入住/押金/费用/账单', isSystem: true, status: 1, permissions: dormPerms },
-      { name: '班主任', description: '学生/班级/排课/教室', isSystem: true, status: 1, permissions: teacherPerms },
-      { name: '财务', description: '费用/账单/押金/租赁方', isSystem: true, status: 1, permissions: financePerms },
-      { name: '操作员', description: '日常操作', isSystem: true, status: 1, permissions: operatorPerms },
-    ];
-
-    for (const r of roles) {
-      await this.roleRepo.save(r);
-    }
-    this.logger.log(`  ✓ ${roles.length} roles`);
-  }
-
-  // ── 1b: users ───────────────────────────────────────
-
-  private async seedUsers(): Promise<void> {
-    const hash = await bcrypt.hash('123456', 10);
-    const roles = await this.roleRepo.find();
-    const superAdminRole = roles.find((r) => r.name === '超管');
-    const operatorRole = roles.find((r) => r.name === '宿管');
-
-
-    const existingUsernames = new Set((await this.userRepo.find({ select: ['username'] })).map(u => u.username));
-
-    const usersToCreate = [
-      { username: 'admin', name: '管理员', roles: [superAdminRole!] },
-      { username: 'jidi', name: '恭学基地管理-微微', roles: [operatorRole!] },
-      { username: 'jiaoyu', name: '恭学教育', roles: [operatorRole!] },
-    ].filter(u => !existingUsernames.has(u.username));
-
-    const saved: User[] = [];
-    for (const u of usersToCreate) {
-      const user = await this.userRepo.save({
-        username: u.username,
-        name: u.name,
-        passwordHash: hash,
-        isActive: true,
-        roles: u.roles,
-      });
-      saved.push(user);
-    }
-    // Load all users for later seed steps to reference
-    this.cachedUsers = await this.userRepo.find();
-    this.logger.log(`  ✓ ${usersToCreate.length} new users, ${this.cachedUsers.length} total (password: 123456)`);
-  }
-
-  // ── 2a: tenants ──────────────────────────────────────
-
-  private async seedTenants(): Promise<void> {
-    const tenants = [
-      { name: '犀牛华安', contact: '陈浩', phone: '18307069952', color: '#36cfc9' },
-    ];
-    const saved = await this.tenantRepo.save(tenants);
-    this.cachedTenants = saved;
-    this.logger.log(`  ✓ ${saved.length} tenants`);
-  }
-
-  // ── 2b: rooms ────────────────────────────────────────
-
-  private async seedRooms(): Promise<void> {
-    // Real data pattern: 单人间 (2号楼5层) + 四人间 (3/4/5/6号楼1-2层)
-    const rooms: Array<{ roomNumber: string; building: string; floor: number; capacity: number; status: string; roomType: string; gender: string; rentalCategory: string; monthlyRate: number }> = [
-      // 2号楼5层 单人间 pattern (real data: 2-502 through 2-519)
-      { roomNumber: '2-502', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-503', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-504', building: '2号楼', floor: 5, capacity: 1, status: 'available', roomType: '单人间', gender: '男', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-505', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '男', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-506', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-507', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-508', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-509', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-510', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-511', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '男', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-512', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-513', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-515', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-516', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-517', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-518', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      { roomNumber: '2-519', building: '2号楼', floor: 5, capacity: 1, status: 'full', roomType: '单人间', gender: '女', rentalCategory: 'long', monthlyRate: 800 },
-      // 1号楼 家庭房
-      { roomNumber: '1-2-301', building: '1号楼', floor: 3, capacity: 2, status: 'full', roomType: '家庭房', gender: '男', rentalCategory: 'long', monthlyRate: 1200 },
-      // 四人间 pattern
-      { roomNumber: '3-106', building: '3号楼', floor: 1, capacity: 4, status: 'available', roomType: '四人间', gender: '女', rentalCategory: 'long', monthlyRate: 1200 },
-      { roomNumber: '3-107', building: '3号楼', floor: 1, capacity: 4, status: 'full', roomType: '四人间', gender: '女', rentalCategory: 'long', monthlyRate: 1200 },
-      { roomNumber: '4-107', building: '4号楼', floor: 1, capacity: 4, status: 'available', roomType: '四人间', gender: '男', rentalCategory: 'long', monthlyRate: 1200 },
-      { roomNumber: '4-111', building: '4号楼', floor: 1, capacity: 4, status: 'available', roomType: '四人间', gender: '男', rentalCategory: 'long', monthlyRate: 1200 },
-      { roomNumber: '4-201', building: '4号楼', floor: 2, capacity: 4, status: 'available', roomType: '四人间', gender: '男', rentalCategory: 'long', monthlyRate: 1200 },
-      { roomNumber: '4-204', building: '4号楼', floor: 2, capacity: 4, status: 'available', roomType: '四人间', gender: '男', rentalCategory: 'long', monthlyRate: 1200 },
-      { roomNumber: '5-109', building: '5号楼', floor: 1, capacity: 4, status: 'available', roomType: '四人间', gender: '女', rentalCategory: 'long', monthlyRate: 1200 },
-      { roomNumber: '6-116', building: '6号楼', floor: 1, capacity: 4, status: 'available', roomType: '四人间', gender: '男', rentalCategory: 'long', monthlyRate: 1200 },
-    ];
-
-    const saved = await this.roomRepo.save(rooms);
-    this.cachedRooms = saved;
-    this.logger.log(`  ✓ ${saved.length} rooms`);
-  }
-
-  // ── 2c: classrooms ───────────────────────────────────
-
-  private async seedClassrooms(): Promise<void> {
-    const classrooms = [
-      { name: '102', building: 'a座', floor: 1, capacity: 30, roomType: '大', supervisor: '陈浩' },
-      { name: '201', building: 'a座', floor: 2, capacity: 30, roomType: '大', supervisor: '刘老师' },
-      { name: '202', building: 'a座', floor: 2, capacity: 25, roomType: '次大', supervisor: '刘老师' },
-      { name: '301', building: 'b座', floor: 3, capacity: 20, roomType: '小', supervisor: '黄老师' },
-    ];
-    const saved = await this.classroomRepo.save(classrooms);
-    this.cachedClassrooms = saved;
-    this.logger.log(`  ✓ ${saved.length} classrooms`);
-  }
-
-  // ── 2d: students ─────────────────────────────────────
-
-  private async seedStudents(): Promise<void> {
-    // Real data pattern: organization fields like 恭学专升本, 26定向, 续住, etc.
-    const students: Array<{ name: string; phone: string; studentNo: string; gender: string; ethnicity: string; organization: string; supervisor: string; status: string }> = [
-      // 26定向 students
-      { name: '聂天羽', phone: '12345678912', studentNo: '123456', gender: '女', ethnicity: '汉', organization: '恭学专升本', supervisor: '', status: 'active' },
-      { name: '艾柯丽努尔·艾买尔江', phone: '', studentNo: '', gender: '女', ethnicity: '汉', organization: '26定向', supervisor: '', status: 'active' },
-      { name: '陈昊天', phone: '', studentNo: '', gender: '男', ethnicity: '汉', organization: '续住', supervisor: '糕糕', status: 'active' },
-      { name: '赵璟涵', phone: '', studentNo: '', gender: '女', ethnicity: '汉', organization: '26定向', supervisor: '', status: 'active' },
-      { name: '周子涵', phone: '', studentNo: '', gender: '女', ethnicity: '汉', organization: '26定向', supervisor: '', status: 'active' },
-      { name: '秦婧怡', phone: '', studentNo: '', gender: '女', ethnicity: '汉', organization: '26尊享+暑文', supervisor: '', status: 'active' },
-      { name: '石欣欣', phone: '', studentNo: '', gender: '女', ethnicity: '汉', organization: '26尊享', supervisor: '', status: 'active' },
-      { name: '李光铄', phone: '', studentNo: '', gender: '男', ethnicity: '汉', organization: '26定向', supervisor: '', status: 'active' },
-      { name: '田芸竹', phone: '12345678920', studentNo: '123464', gender: '女', ethnicity: '汉', organization: '恭学专升本', supervisor: '', status: 'active' },
-      { name: '荚欣语', phone: '12345678921', studentNo: '123465', gender: '女', ethnicity: '汉', organization: '恭学专升本', supervisor: '', status: 'active' },
-      { name: '刘倬宁', phone: '12345678922', studentNo: '123466', gender: '女', ethnicity: '汉', organization: '恭学专升本', supervisor: '', status: 'active' },
-      { name: '柴高星', phone: '', studentNo: '', gender: '女', ethnicity: '汉', organization: '26尊享+暑专+专冲', supervisor: '', status: 'active' },
-      { name: '焦怡菲', phone: '', studentNo: '', gender: '女', ethnicity: '汉', organization: '26尊享+暑期+专冲+年前文化', supervisor: '', status: 'active' },
-      { name: '王姿璇', phone: '', studentNo: '', gender: '女', ethnicity: '汉', organization: '26定向', supervisor: '', status: 'active' },
-      { name: '寇星彤', phone: '12345678926', studentNo: '123470', gender: '女', ethnicity: '汉', organization: '恭学专升本', supervisor: '', status: 'active' },
-      // 续住 students
-      { name: '於嘉丽', phone: '', studentNo: '', gender: '女', ethnicity: '汉族', organization: '续住', supervisor: '泡泡', status: 'active' },
-      { name: '郑斌', phone: '', studentNo: '', gender: '男', ethnicity: '汉族', organization: '续住', supervisor: '糕糕', status: 'active' },
-      { name: '仵梓钰', phone: '', studentNo: '', gender: '女', ethnicity: '汉族', organization: '续住', supervisor: '方方', status: 'active' },
-      { name: '覃鼎浩', phone: '', studentNo: '', gender: '男', ethnicity: '汉族', organization: '续住', supervisor: '云熙', status: 'active' },
-      { name: '常智禹', phone: '', studentNo: '', gender: '男', ethnicity: '汉族', organization: '续住', supervisor: '方方', status: 'active' },
-      { name: '郭庆泉', phone: '', studentNo: '', gender: '男', ethnicity: '汉族', organization: '续住', supervisor: '糕糕', status: 'active' },
-      { name: '孙立欣', phone: '', studentNo: '', gender: '男', ethnicity: '汉族', organization: '续住', supervisor: '糕糕', status: 'active' },
-      { name: '韩尧祖', phone: '', studentNo: '', gender: '男', ethnicity: '汉族', organization: '', supervisor: '', status: 'active' },
-      { name: '陈亚津', phone: '', studentNo: '', gender: '女', ethnicity: '汉族', organization: '', supervisor: '', status: 'active' },
-      { name: '孟思妍', phone: '', studentNo: '', gender: '女', ethnicity: '汉族', organization: '26定向', supervisor: '', status: 'active' },
-      { name: '武嘉怡', phone: '', studentNo: '', gender: '女', ethnicity: '汉族', organization: '26定向', supervisor: '', status: 'active' },
-      { name: '刘禹含', phone: '', studentNo: '', gender: '女', ethnicity: '汉族', organization: '26定向', supervisor: '', status: 'active' },
-      { name: '杜瑾慧', phone: '', studentNo: '', gender: '女', ethnicity: '汉族', organization: '26定向', supervisor: '', status: 'active' },
-      { name: '孟凡志', phone: '', studentNo: '', gender: '男', ethnicity: '汉族', organization: '26定向', supervisor: '', status: 'active' },
-    ];
-
-    const saved = await this.studentRepo.save(students);
-    this.cachedStudents = saved;
-    this.logger.log(`  ✓ ${saved.length} students`);
-  }
-
-  // ── 3a: classes ──────────────────────────────────────
-
-  private async seedClasses(): Promise<void> {
-    const clsData = [
-      { name: '26定向班', code: 'DX2026-01', classType: ClassType.CULTURE, status: ClassStatus.ACTIVE },
-      { name: '26尊享班', code: 'ZX2026-01', classType: ClassType.PROFESSIONAL, status: ClassStatus.ACTIVE },
-      { name: '续住1班', code: 'XZ2026-01', classType: ClassType.CULTURE, status: ClassStatus.ACTIVE },
-      { name: '恭学专升本1班', code: 'ZS2026-01', classType: ClassType.PROFESSIONAL, status: ClassStatus.ACTIVE },
-      { name: '暑期文化课', code: 'SQ2026-01', classType: ClassType.SPRINT, status: ClassStatus.ENROLLING },
-    ];
-
-    const savedClasses: Class[] = [];
-    for (const c of clsData) {
-      const saved = await this.classRepo.save({
-        ...c,
-        startDate: '2026-04-01',
-        endDate: '2026-08-31',
-        maxStudents: 30,
-      });
-      savedClasses.push(saved);
-    }
-
-    // Distribute students
-    const orgMap: Record<string, Student[]> = {};
-    for (const s of this.cachedStudents) {
-      const key = s.organization || 'other';
-      (orgMap[key] ??= []).push(s);
-    }
-
-    const assignments: Record<string, Class> = {
-      '26定向': savedClasses[0],
-      '26尊享': savedClasses[1],
-      '续住': savedClasses[2],
-      '恭学专升本': savedClasses[3],
-    };
-
-    for (const [org, students] of Object.entries(orgMap)) {
-      // Match by prefix
-      const clsKey = Object.keys(assignments).find((k) => org.startsWith(k) || k.startsWith(org));
-      const cls = clsKey ? assignments[clsKey] : pick(savedClasses);
-      for (const s of students) {
-        await this.classStudentRepo.save({
-          classId: cls!.id,
-          studentId: s.id,
-          joinDate: '2026-04-01',
-          status: 'active',
-        });
-      }
-    }
-
-    // Assign teachers
-    for (const cls of savedClasses) {
-      const teacher = pick(this.cachedUsers);
-      await this.classTeacherRepo.save({
-        classId: cls.id,
-        userId: teacher.id,
-        roleType: TeacherRoleType.HEAD_TEACHER,
-      });
-      await this.classRepo.update(cls.id, { headTeacherId: teacher.id });
-    }
-
-    this.cachedClasses = savedClasses;
-    this.logger.log(`  ✓ ${savedClasses.length} classes`);
-  }
-
-  // ── 3b: occupancies ──────────────────────────────────
-
-  private async seedOccupancies(): Promise<void> {
-    // Real data pattern: students mapped to specific rooms
-    const mapping: Array<{ studentIdx: number; roomIdx: number; checkInDate: string; notes: string }> = [
-      { studentIdx: 0, roomIdx: 14, checkInDate: '2026-04-01', notes: '' },           // 聂天羽 -> 2-516
-      { studentIdx: 1, roomIdx: 3, checkInDate: '2026-07-12', notes: '定向' },         // 艾柯丽努尔 -> 2-505
-      { studentIdx: 2, roomIdx: 4, checkInDate: '2026-03-01', notes: '续住' },         // 陈昊天 -> 2-506
-      { studentIdx: 3, roomIdx: 5, checkInDate: '2026-07-12', notes: '定向' },         // 赵璟涵 -> 2-507
-      { studentIdx: 4, roomIdx: 6, checkInDate: '2026-07-12', notes: '定向' },         // 周子涵 -> 2-508
-      { studentIdx: 5, roomIdx: 7, checkInDate: '2026-07-12', notes: '暑期文化+尊享' },// 秦婧怡 -> 2-509
-      { studentIdx: 6, roomIdx: 12, checkInDate: '2026-09-15', notes: '' },            // 石欣欣 -> 2-513
-      { studentIdx: 7, roomIdx: 10, checkInDate: '2026-07-12', notes: '定向' },        // 李光铄 -> 2-511
-      { studentIdx: 8, roomIdx: 13, checkInDate: '2026-09-15', notes: '' },            // 田芸竹 -> 2-515
-      { studentIdx: 9, roomIdx: 0, checkInDate: '2026-09-15', notes: '' },             // 荚欣语 -> 2-502
-      { studentIdx: 10, roomIdx: 1, checkInDate: '2026-09-15', notes: '' },            // 刘倬宁 -> 2-503
-      { studentIdx: 11, roomIdx: 14, checkInDate: '2026-08-12', notes: '' },           // 柴高星 -> 2-516
-      { studentIdx: 12, roomIdx: 15, checkInDate: '2026-07-12', notes: '定向' },       // 焦怡菲 -> 2-517
-      { studentIdx: 13, roomIdx: 16, checkInDate: '2026-07-12', notes: '定向' },       // 王姿璇 -> 2-518
-      { studentIdx: 14, roomIdx: 2, checkInDate: '2026-06-05', notes: '' },            // 寇星彤 -> 2-504
-      { studentIdx: 15, roomIdx: 19, checkInDate: '2026-04-01', notes: '' },           // 於嘉丽 -> 3-106
-      { studentIdx: 16, roomIdx: 21, checkInDate: '2026-04-01', notes: '' },           // 郑斌 -> 4-107
-      { studentIdx: 17, roomIdx: 23, checkInDate: '2026-04-01', notes: '' },           // 仵梓钰 -> 4-201
-      { studentIdx: 18, roomIdx: 25, checkInDate: '2026-04-01', notes: '' },           // 覃鼎浩 -> 5-109
-      { studentIdx: 19, roomIdx: 17, checkInDate: '2026-04-01', notes: '' },           // 常智禹 -> 1-2-301
-      { studentIdx: 20, roomIdx: 8, checkInDate: '2026-05-14', notes: '' },            // 郭庆泉 -> 2-510
-      { studentIdx: 21, roomIdx: 8, checkInDate: '2026-05-14', notes: '' },            // 孙立欣 -> 2-510
-      { studentIdx: 22, roomIdx: 18, checkInDate: '2026-06-09', notes: '' },           // 韩尧祖 -> 3-107
-      { studentIdx: 23, roomIdx: 20, checkInDate: '2026-08-15', notes: '' },           // 陈亚津 -> 4-111
-      { studentIdx: 24, roomIdx: 26, checkInDate: '2026-07-12', notes: '' },           // 孟思妍 -> 6-116
-      { studentIdx: 25, roomIdx: 26, checkInDate: '2026-07-12', notes: '' },           // 武嘉怡 -> 6-116
-      { studentIdx: 26, roomIdx: 26, checkInDate: '2026-07-12', notes: '' },           // 刘禹含 -> 6-116
-      { studentIdx: 27, roomIdx: 26, checkInDate: '2026-07-12', notes: '' },           // 杜瑾慧 -> 6-116
-      { studentIdx: 28, roomIdx: 18, checkInDate: '2026-06-04', notes: '' },           // 孟凡志 -> 3-107
-    ];
-
-    const occupancies: Array<{ studentId: number; roomId: number; checkInDate: string; billingStartDate: string; rentalType: string; notes: string; checkOutDate?: string; billingEndDate?: string }> = [];
-    for (const m of mapping) {
-      const student = this.cachedStudents[m.studentIdx];
-      const room = this.cachedRooms[m.roomIdx];
-      if (student && room) {
-        occupancies.push({
-          studentId: student.id,
-          roomId: room.id,
-          checkInDate: m.checkInDate,
-          billingStartDate: m.checkInDate,
-          rentalType: room.rentalCategory,
-          notes: m.notes,
-        });
-      }
-    }
-
-    // One checkout: 陈昊天 checked out
-    occupancies[2].checkOutDate = '2026-06-09';
-    occupancies[2].billingEndDate = '2026-06-09';
-
-    await this.occupancyRepo.save(occupancies);
-    this.logger.log(`  ✓ ${occupancies.length} occupancies`);
-  }
-
-  // ── 3c: class schedules ──────────────────────────────
-
-  private async seedSchedules(): Promise<void> {
-    const subjects = ['数学', '英语', '语文', '专业课', '政治', '历史'];
-    const schedules: Array<{ classId: number; classroomId: number; weekDay: number; startTime: string; endTime: string; startDate: string; endDate: string; subject: string; teacherId: number; scheduleType: string }> = [];
-
-    for (const cls of this.cachedClasses.slice(0, 3)) {
-      for (let day = 1; day <= 5; day++) {
-        schedules.push(
-          {
-            classId: cls.id,
-            classroomId: pick(this.cachedClassrooms).id,
-            weekDay: day,
-            startTime: '08:30',
-            endTime: '10:00',
-            startDate: cls.startDate ?? '2026-04-01',
-            endDate: cls.endDate ?? '2026-08-31',
-            subject: pick(subjects),
-            teacherId: pick(this.cachedUsers).id,
-            scheduleType: ScheduleType.INTERNAL,
-          },
-          {
-            classId: cls.id,
-            classroomId: pick(this.cachedClassrooms).id,
-            weekDay: day,
-            startTime: '10:30',
-            endTime: '12:00',
-            startDate: cls.startDate ?? '2026-04-01',
-            endDate: cls.endDate ?? '2026-08-31',
-            subject: pick(subjects),
-            teacherId: pick(this.cachedUsers).id,
-            scheduleType: ScheduleType.INTERNAL,
-          },
-        );
-      }
-    }
-
-    await this.scheduleRepo.save(schedules);
-    this.logger.log(`  ✓ ${schedules.length} schedules`);
-  }
-
-  // ── 4a: room expenses ────────────────────────────────
-
-  private async seedRoomExpenses(): Promise<void> {
-    // Real data: electricity + water per room, April & May 2026
-    const expenseRooms = [
-      { roomIdx: 24, electric: { apr: 38.55, may: 57.81 }, water: { apr: 9.80, may: 9.80 } },    // 5-109
-      { roomIdx: 19, electric: { apr: 44.34, may: 35.16 }, water: { apr: 9.80, may: 4.90 } },     // 3-106
-      { roomIdx: 17, electric: { apr: 27.09, may: 23.84 }, water: { apr: 4.90, may: 4.90 } },     // 1-2-301
-      { roomIdx: 21, electric: { apr: 42.79, may: 41.21 }, water: { apr: 9.80, may: 9.80 } },     // 4-107
-      { roomIdx: 22, electric: { apr: 39.90, may: 31.99 }, water: { apr: 9.80, may: 4.90 } },     // 4-111
-      { roomIdx: 23, electric: { apr: 101.00, may: 98.18 }, water: { apr: 19.60, may: 19.60 } },  // 4-201
-    ];
-
-    const expenses: Array<{ roomId: number; expenseType: string; amount: number; periodStart: string; periodEnd: string; description: string }> = [];
-
-    for (const er of expenseRooms) {
-      const room = this.cachedRooms[er.roomIdx];
-      if (!room) continue;
-      // April
-      expenses.push({
-        roomId: room.id, expenseType: 'electricity', amount: er.electric.apr,
-        periodStart: '2026-04-01', periodEnd: '2026-04-30',
-        description: `电费 - ${room.roomNumber} 4月`,
-      });
-      expenses.push({
-        roomId: room.id, expenseType: 'water', amount: er.water.apr,
-        periodStart: '2026-04-01', periodEnd: '2026-04-30',
-        description: `水费 - ${room.roomNumber} 4月`,
-      });
-      // May
-      expenses.push({
-        roomId: room.id, expenseType: 'electricity', amount: er.electric.may,
-        periodStart: '2026-05-01', periodEnd: '2026-05-31',
-        description: `电费 - ${room.roomNumber} 5月`,
-      });
-      expenses.push({
-        roomId: room.id, expenseType: 'water', amount: er.water.may,
-        periodStart: '2026-05-01', periodEnd: '2026-05-31',
-        description: `水费 - ${room.roomNumber} 5月`,
-      });
-    }
-
-    await this.roomExpenseRepo.save(expenses);
-    this.logger.log(`  ✓ ${expenses.length} room expenses`);
-  }
-
-  // ── 4b: deposits ─────────────────────────────────────
-
-  private async seedDeposits(): Promise<void> {
-    // Real data: deposits tied to specific students
-    const depositStudents = [24, 25, 26, 27, 28, 19, 2]; // indices into cachedStudents
-    const deposits: Array<{ studentId: number; amount: number; status: string; paidDate: string }> = [];
-
-    for (const idx of depositStudents) {
-      const s = this.cachedStudents[idx];
-      if (!s) continue;
-      deposits.push({
-        studentId: s.id,
-        amount: 500,
-        status: 'paid',
-        paidDate: s.id <= this.cachedStudents[25].id ? '2026-07-12' : '2026-06-04',
-      });
-    }
-
-    // Manual deposits with custom amounts
-    deposits.push({ studentId: this.cachedStudents[19].id, amount: 200, status: 'paid', paidDate: '2026-03-01' }); // 常智禹
-    deposits.push({ studentId: this.cachedStudents[2].id, amount: 121.60, status: 'paid', paidDate: '2026-03-01' }); // 陈昊天
-
-    await this.depositRepo.save(deposits);
-    this.logger.log(`  ✓ ${deposits.length} deposits`);
-  }
-
-  // ── 4c: bills ────────────────────────────────────────
-
-  private async seedBills(): Promise<void> {
-    // Real data: bills for students with occupancies, April & May
-    const billData = [
-      { studentIdx: 15, roomIdx: 19, sharedApr: 54.14, sharedMay: 40.06 },   // 於嘉丽
-      { studentIdx: 16, roomIdx: 21, sharedApr: 52.59, sharedMay: 51.01 },   // 郑斌
-      { studentIdx: 17, roomIdx: 22, sharedApr: 49.70, sharedMay: 36.89 },   // 仵梓钰
-      { studentIdx: 18, roomIdx: 24, sharedApr: 120.60, sharedMay: 117.78 }, // 覃鼎浩
-      { studentIdx: 19, roomIdx: 17, sharedApr: 31.99, sharedMay: 28.74 },   // 常智禹
-      { studentIdx: 2, roomIdx: 4, sharedApr: 48.35, sharedMay: 67.61 },     // 陈昊天
-    ];
-
-    for (const bd of billData) {
-      const student = this.cachedStudents[bd.studentIdx];
-      const room = this.cachedRooms[bd.roomIdx];
-      if (!student || !room) continue;
-
-      // April bill
-      const billApr = await this.billRepo.save({
-        studentId: student.id,
-        periodStart: '2026-04-01',
-        periodEnd: '2026-04-30',
-        sharedAmount: bd.sharedApr,
-        personalAmount: 0,
-        totalAmount: bd.sharedApr,
-        status: 'paid',
-      });
-      await this.billItemRepo.save([
-        { billId: billApr.id, roomId: room.id, expenseType: 'electricity', description: '电费分摊', days: 30, studentAmount: Math.round(bd.sharedApr * 0.82 * 100) / 100 },
-        { billId: billApr.id, roomId: room.id, expenseType: 'water', description: '水费分摊', days: 30, studentAmount: Math.round(bd.sharedApr * 0.18 * 100) / 100 },
-      ]);
-
-      // May bill
-      const billMay = await this.billRepo.save({
-        studentId: student.id,
-        periodStart: '2026-05-01',
-        periodEnd: '2026-05-31',
-        sharedAmount: bd.sharedMay,
-        personalAmount: 0,
-        totalAmount: bd.sharedMay,
-        status: 'paid',
-      });
-      await this.billItemRepo.save([
-        { billId: billMay.id, roomId: room.id, expenseType: 'electricity', description: '电费分摊', days: 31, studentAmount: Math.round(bd.sharedMay * 0.82 * 100) / 100 },
-        { billId: billMay.id, roomId: room.id, expenseType: 'water', description: '水费分摊', days: 31, studentAmount: Math.round(bd.sharedMay * 0.18 * 100) / 100 },
-      ]);
-    }
-
-    this.logger.log('  ✓ bills + items (April & May 2026)');
-  }
-
-  // ── 5a: attendance ───────────────────────────────────
-
-  private async seedAttendance(): Promise<void> {
-    const statuses = ['present', 'absent', 'late', 'leave'];
-    const records: Array<{ studentId: number; classId: number; attendanceDate: string; session: string; status: string; source: string }> = [];
-
-    for (const cls of this.cachedClasses) {
-      const classStudents = await this.classStudentRepo.find({ where: { classId: cls.id } });
-      for (const cs of classStudents) {
-        // Last 10 weekdays
-        let d = 0;
-        let count = 0;
-        while (count < 10) {
-          const date = new Date();
-          date.setDate(date.getDate() - d);
-          const dow = date.getDay();
-          if (dow !== 0 && dow !== 6) {
-            records.push({
-              studentId: cs.studentId,
-              classId: cls.id,
-              attendanceDate: date.toISOString().slice(0, 10),
-              session: 'am',
-              status: pick(statuses),
-              source: 'manual',
-            });
-            count++;
-          }
-          d++;
-        }
-      }
-    }
-
-    await this.attendanceRepo.save(records);
-    this.logger.log(`  ✓ ${records.length} attendance records`);
-  }
-
-  // ── 5b: classroom rentals ────────────────────────────
-
-  private async seedClassroomRentals(): Promise<void> {
-    if (this.cachedClassrooms.length > 0 && this.cachedTenants.length > 0) {
-      await this.rentalRepo.save({
-        classroomId: this.cachedClassrooms[0].id,
-        tenantId: this.cachedTenants[0].id,
-        startDate: '2026-05-14',
-        endDate: '2026-06-30',
-        totalAmount: 30000,
-        status: 'active',
-      });
-      this.logger.log('  ✓ 1 classroom rental');
-    }
-  }
-
-  // ── 6a: student profiles ─────────────────────────────
-
-  private async seedProfiles(): Promise<void> {
-    const colleges = ['北京大学', '清华大学', '复旦大学', '浙江大学', '南京大学'];
-    const profiles = this.cachedStudents.slice(0, 10).map((s) => ({
-      studentId: s.id,
-      targetCollege: pick(colleges),
-      targetMajor: pick(['计算机科学', '数学', '物理学', '经济学']),
-      subjectDirection: pick(['理科', '文科']),
-      grade: '高三',
-      campusLocation: '主校区',
-    }));
-    await this.profileRepo.save(profiles);
-    this.logger.log(`  ✓ ${profiles.length} student profiles`);
-  }
-
-  // ── 6b: student enrollments ──────────────────────────
-
-  private async seedEnrollments(): Promise<void> {
-    const enrollments = this.cachedStudents.slice(0, 15).map((s) => ({
-      studentId: s.id,
-      courseCategory: pick(['文化课', '专业课', '集训']),
-      classType: pick(['全日制', '周末班']),
-      className: pick(['26定向班', '26尊享班', '续住1班']),
-      headTeacher: '张班主任',
-      startDate: '2026-04-01',
-      endDate: '2026-08-31',
-      status: 'active',
-    }));
-    await this.enrollmentRepo.save(enrollments);
-    this.logger.log(`  ✓ ${enrollments.length} enrollments`);
-  }
-
-  // ── 6c: exam scores ──────────────────────────────────
-
-  private async seedExamScores(): Promise<void> {
-    const subjects = ['数学', '英语', '语文', '专业课'];
-    const exams = ['月考', '期中考试', '模拟考试'];
-    const scores: Array<{ studentId: number; examType: string; examName: string; subject: string; score: number; examDate: string }> = [];
-
-    for (const s of this.cachedStudents.slice(0, 10)) {
-      for (const exam of exams) {
-        for (const subj of subjects) {
-          scores.push({
-            studentId: s.id,
-            examType: 'exam',
-            examName: exam,
-            subject: subj,
-            score: randInt(50, 100),
-            examDate: `2026-0${randInt(4, 6)}-${String(randInt(1, 28)).padStart(2, '0')}`,
-          });
-        }
-      }
-    }
-    await this.examScoreRepo.save(scores);
-    this.logger.log(`  ✓ ${scores.length} exam scores`);
-  }
-
-  // ── 6d: learning records ────────────────────────────
-
-  private async seedLearningRecords(): Promise<void> {
-    const types = ['跟进记录', '家长沟通', '学习反馈', '教学建议'];
-    const records = this.cachedStudents.slice(0, 12).map((s) => ({
-      studentId: s.id,
-      recordDate: `2026-0${randInt(5, 6)}-${String(randInt(1, 28)).padStart(2, '0')}`,
-      recordType: pick(types),
-      content: `学习状态：${pick(['良好', '一般', '需加强'])}`,
-      followUpMethod: pick(['电话', '微信', '面谈']),
-      nextStep: '继续跟进',
-    }));
-    await this.learningRecordRepo.save(records);
-    this.logger.log(`  ✓ ${records.length} learning records`);
-  }
-}
diff --git a/apps/server/src/seed/seed.module.ts b/apps/server/src/seed/seed.module.ts
deleted file mode 100644
index 5590696..0000000
--- a/apps/server/src/seed/seed.module.ts
+++ /dev/null
@@ -1,58 +0,0 @@
-import { Module, OnModuleInit, Logger } from '@nestjs/common';
-import { TypeOrmModule } from '@nestjs/typeorm';
-import { SeedDevService } from './seed-dev.service';
-import {
-  Student, Room, Occupancy, RoomExpense,
-  Bill, BillItem, User, Deposit,
-  Classroom, Tenant, ClassroomRental, Permission, Role,
-  Class, ClassStudent, ClassTeacher, ClassSchedule,
-  AttendanceRecord,
-  StudentProfile, StudentEnrollment, ExamScore, LearningRecord,
-  ExpenseType,
-} from '../entities';
-
-const SEED_ENTITIES = [
-  User, Role, Permission,
-  Tenant, Student, Room, Classroom, Occupancy,
-  RoomExpense, ExpenseType, Class,
-  ClassStudent, ClassTeacher, ClassSchedule, Bill, BillItem,
-  Deposit, AttendanceRecord,
-  ClassroomRental, StudentProfile, StudentEnrollment,
-  ExamScore, LearningRecord,
-];
-
-@Module({
-  imports: [TypeOrmModule.forFeature(SEED_ENTITIES)],
-  providers: [SeedDevService],
-})
-export class SeedModule implements OnModuleInit {
-  private readonly logger = new Logger(SeedModule.name);
-
-  constructor(private readonly seedService: SeedDevService) {}
-
-  async onModuleInit() {
-    const enabled = process.env['SEED_DEV'] === 'true';
-    const skip = process.env['SEED_DEV_SKIP'] === 'true';
-
-    if (!enabled || skip) {
-      this.logger.log(
-        `Seed skipped: SEED_DEV=${process.env['SEED_DEV']}, NODE_ENV=${process.env['NODE_ENV']}, SKIP=${skip}`,
-      );
-      return;
-    }
-
-    const studentCount = await this.seedService.getStudentCount();
-    if (studentCount > 0) {
-      this.logger.log(`Seed skipped: ${studentCount} students already exist`);
-      return;
-    }
-
-    this.logger.log('Starting mock data seeding...');
-    try {
-      await this.seedService.seed();
-      this.logger.log('Mock data seeding completed successfully');
-    } catch (err) {
-      this.logger.error('Mock data seeding failed', err instanceof Error ? err.stack : String(err));
-    }
-  }
-}
diff --git a/apps/server/src/students/students.module.ts b/apps/server/src/students/students.module.ts
index 05d961a..f89e0c4 100644
--- a/apps/server/src/students/students.module.ts
+++ b/apps/server/src/students/students.module.ts
@@ -3,14 +3,13 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { Student } from '../entities/student.entity';
 import { Class } from '../entities/class.entity';
 import { Tenant } from '../entities/tenant.entity';
-import { CommonModule } from '../common/common.module';
 import { ClassStudent } from '../entities/class-student.entity';
 import { AttendanceRecord } from '../entities/attendance-record.entity';
 import { StudentsService } from './students.service';
 import { StudentsController } from './students.controller';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([Student, Class, ClassStudent, AttendanceRecord, Tenant]), CommonModule],
+  imports: [TypeOrmModule.forFeature([Student, Class, ClassStudent, AttendanceRecord, Tenant])],
   controllers: [StudentsController],
   providers: [StudentsService],
   exports: [StudentsService],
diff --git a/apps/server/test/app.e2e-spec.ts b/apps/server/test/app.e2e-spec.ts
deleted file mode 100644
index 7f28aa9..0000000
--- a/apps/server/test/app.e2e-spec.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { INestApplication } from '@nestjs/common';
-import request from 'supertest';
-import { App } from 'supertest/types';
-import { AppModule } from './../src/app.module';
-
-describe('AppController (e2e)', () => {
-  let app: INestApplication<App>;
-
-  beforeEach(async () => {
-    const moduleFixture: TestingModule = await Test.createTestingModule({
-      imports: [AppModule],
-    }).compile();
-
-    app = moduleFixture.createNestApplication();
-    await app.init();
-  });
-
-  it('/ (GET)', () => {
-    return request(app.getHttpServer()).get('/').expect(200).expect('Hello World!');
-  });
-
-  afterEach(async () => {
-    await app.close();
-  });
-});