사용하지 않는 파일 정리 전 백업 (Phase 10 완료 후 상태)

lib/domain/usecases/equipment/get_equipment_detail_usecase.dart

@@ -0,0 +1,24 @@
+import 'package:dartz/dartz.dart';
+import '../../repositories/equipment_repository.dart';
+import '../../../data/models/equipment/equipment_dto.dart';
+import '../../../core/errors/failures.dart';
+import '../base_usecase.dart';
+
+/// 장비 상세 조회 UseCase
+class GetEquipmentDetailUseCase extends UseCase<EquipmentDto, int> {
+  final EquipmentRepository _equipmentRepository;
+
+  GetEquipmentDetailUseCase(this._equipmentRepository);
+
+  @override
+  Future<Either<Failure, EquipmentDto>> call(int equipmentId) async {
+    if (equipmentId <= 0) {
+      return Left(ValidationFailure(
+        message: '올바르지 않은 장비 ID입니다.',
+        errors: {'equipmentId': '장비 ID는 0보다 커야 합니다.'},
+      ));
+    }
+
+    return await _equipmentRepository.getEquipmentDetail(equipmentId);
+  }
+}