결재 템플릿 단계 적용 구현

- ApprovalTemplate 엔티티·DTO·원격 리포지토리 추가
- ApprovalController에 템플릿 로딩/적용 상태와 assignSteps 호출 연동
- ApprovalPage 단계 탭에 템플릿 선택 UI 및 적용 확인 다이얼로그 구현
- 템플릿 적용 단위 테스트와 IMPLEMENTATION_TASKS 현황 갱신

lib/features/masters/group_permission/domain/entities/group_permission.dart

@@ -0,0 +1,113 @@
+/// 그룹-메뉴 권한 엔티티
+///
+/// - 그룹과 메뉴별 CRUD 권한을 표현한다.
+/// - presentation/data 레이어 세부 사항에 의존하지 않는다.
+class GroupPermission {
+  GroupPermission({
+    this.id,
+    required this.group,
+    required this.menu,
+    this.canCreate = false,
+    this.canRead = true,
+    this.canUpdate = false,
+    this.canDelete = false,
+    this.isActive = true,
+    this.isDeleted = false,
+    this.note,
+    this.createdAt,
+    this.updatedAt,
+  });
+
+  final int? id;
+  final GroupPermissionGroup group;
+  final GroupPermissionMenu menu;
+  final bool canCreate;
+  final bool canRead;
+  final bool canUpdate;
+  final bool canDelete;
+  final bool isActive;
+  final bool isDeleted;
+  final String? note;
+  final DateTime? createdAt;
+  final DateTime? updatedAt;
+
+  GroupPermission copyWith({
+    int? id,
+    GroupPermissionGroup? group,
+    GroupPermissionMenu? menu,
+    bool? canCreate,
+    bool? canRead,
+    bool? canUpdate,
+    bool? canDelete,
+    bool? isActive,
+    bool? isDeleted,
+    String? note,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+  }) {
+    return GroupPermission(
+      id: id ?? this.id,
+      group: group ?? this.group,
+      menu: menu ?? this.menu,
+      canCreate: canCreate ?? this.canCreate,
+      canRead: canRead ?? this.canRead,
+      canUpdate: canUpdate ?? this.canUpdate,
+      canDelete: canDelete ?? this.canDelete,
+      isActive: isActive ?? this.isActive,
+      isDeleted: isDeleted ?? this.isDeleted,
+      note: note ?? this.note,
+      createdAt: createdAt ?? this.createdAt,
+      updatedAt: updatedAt ?? this.updatedAt,
+    );
+  }
+}
+
+class GroupPermissionGroup {
+  GroupPermissionGroup({required this.id, required this.groupName});
+
+  final int id;
+  final String groupName;
+}
+
+class GroupPermissionMenu {
+  GroupPermissionMenu({required this.id, required this.menuName});
+
+  final int id;
+  final String menuName;
+}
+
+/// 그룹 권한 생성/수정 입력 모델
+class GroupPermissionInput {
+  GroupPermissionInput({
+    required this.groupId,
+    required this.menuId,
+    this.canCreate = false,
+    this.canRead = true,
+    this.canUpdate = false,
+    this.canDelete = false,
+    this.isActive = true,
+    this.note,
+  });
+
+  final int groupId;
+  final int menuId;
+  final bool canCreate;
+  final bool canRead;
+  final bool canUpdate;
+  final bool canDelete;
+  final bool isActive;
+  final String? note;
+
+  Map<String, dynamic> toPayload() {
+    return {
+      'group_id': groupId,
+      'menu_id': menuId,
+      'can_create': canCreate,
+      'can_read': canRead,
+      'can_update': canUpdate,
+      'can_delete': canDelete,
+      'is_active': isActive,
+      'note': note,
+    };
+  }
+}

lib/features/masters/group_permission/domain/repositories/group_permission_repository.dart

@@ -0,0 +1,22 @@
+import 'package:superport_v2/core/common/models/paginated_result.dart';
+
+import '../entities/group_permission.dart';
+
+abstract class GroupPermissionRepository {
+  Future<PaginatedResult<GroupPermission>> list({
+    int page = 1,
+    int pageSize = 20,
+    int? groupId,
+    int? menuId,
+    bool? isActive,
+    bool includeDeleted = false,
+  });
+
+  Future<GroupPermission> create(GroupPermissionInput input);
+
+  Future<GroupPermission> update(int id, GroupPermissionInput input);
+
+  Future<void> delete(int id);
+
+  Future<GroupPermission> restore(int id);
+}