결재 단계 편집 다이얼로그 구현

lib/features/approvals/step/domain/repositories/approval_step_repository.dart

@@ -1,5 +1,6 @@
 import 'package:superport_v2/core/common/models/paginated_result.dart';
 
+import '../entities/approval_step_input.dart';
 import '../entities/approval_step_record.dart';
 
 abstract class ApprovalStepRepository {
@@ -13,4 +14,10 @@ abstract class ApprovalStepRepository {
   });
 
   Future<ApprovalStepRecord> fetchDetail(int id);
+
+  /// 결재 단계를 생성한다.
+  Future<ApprovalStepRecord> create(ApprovalStepInput input);
+
+  /// 결재 단계를 수정한다.
+  Future<ApprovalStepRecord> update(int id, ApprovalStepInput input);
 }