fix(sync): remove unused classStudentRepo injection, use transactional manager for class lookup

apps/server/src/sync/sync.service.ts

@@ -40,8 +40,6 @@ export class SyncService {
     private readonly roleRepo: Repository<Role>,
     @InjectRepository(ClassEntity)
     private readonly classRepo: Repository<ClassEntity>,
-    @InjectRepository(ClassStudent)
-    private readonly classStudentRepo: Repository<ClassStudent>,
     private readonly dingTalkService: DingTalkService,
     private readonly weComService: WeComService,
     private readonly attendanceImportService: AttendanceImportService,
@@ -255,7 +253,7 @@ export class SyncService {
         const tc = await manager.count(ClassTeacher, { where: { classId } });
         const sc = await manager.count(ClassStudent, { where: { classId } });
         if (tc === 0 && sc === 0) {
-          const cls = await this.classRepo.findOne({ where: { id: classId } });
+          const cls = await manager.findOne(ClassEntity, { where: { id: classId } });
           warnings.push(`班级 "${cls?.name}" (deptId=${deptId}) 无任何师生`);
         }
       }