결재 단계 목록 화면과 테스트 도입

lib/features/approvals/step/domain/entities/approval_step_record.dart

@@ -0,0 +1,36 @@
+import '../../../domain/entities/approval.dart';
+
+/// 결재 단계 레코드
+///
+/// - 개별 결재 요청의 특정 단계를 목록으로 조회할 때 사용한다.
+class ApprovalStepRecord {
+  ApprovalStepRecord({
+    required this.approvalId,
+    required this.approvalNo,
+    this.transactionNo,
+    this.templateName,
+    required this.step,
+  });
+
+  final int approvalId;
+  final String approvalNo;
+  final String? transactionNo;
+  final String? templateName;
+  final ApprovalStep step;
+
+  ApprovalStepRecord copyWith({
+    int? approvalId,
+    String? approvalNo,
+    String? transactionNo,
+    String? templateName,
+    ApprovalStep? step,
+  }) {
+    return ApprovalStepRecord(
+      approvalId: approvalId ?? this.approvalId,
+      approvalNo: approvalNo ?? this.approvalNo,
+      transactionNo: transactionNo ?? this.transactionNo,
+      templateName: templateName ?? this.templateName,
+      step: step ?? this.step,
+    );
+  }
+}

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

@@ -0,0 +1,16 @@
+import 'package:superport_v2/core/common/models/paginated_result.dart';
+
+import '../entities/approval_step_record.dart';
+
+abstract class ApprovalStepRepository {
+  Future<PaginatedResult<ApprovalStepRecord>> list({
+    int page = 1,
+    int pageSize = 20,
+    String? query,
+    int? statusId,
+    int? approverId,
+    int? approvalId,
+  });
+
+  Future<ApprovalStepRecord> fetchDetail(int id);
+}