back/Infrastructure/Repositories/SpendingGroupRepo.cs

@@ -70,7 +70,7 @@ public class SpendingGroupRepo : ISpendingGroupRepo
         var group = await context.SpendingGroups
             .AsNoTracking()
             .Where(x => x.Id == plan.SpendingGroupId)
-            .Include(x => x.ChangeRecords
+            .Include(x => x.ChangeRecords!
                     // Выбираем из них только те, которые попадают в диапазон дат плана
                     .Where(cg => cg.ChangedAt >= plan.StartAt && cg.ChangedAt <= plan.EndAt)
                     // И сортируем их по дате

back/Infrastructure/Support/Mappers/ChangeRecordMapper.cs

@@ -12,7 +12,8 @@ public static class ChangeRecordMapper
             Sum = changeRecord.Sum,
             ChangedAt = changeRecord.ChangedAt,
             SpendingGroupId = changeRecord.SpendingGroupId,
-            UserId = changeRecord.UserId
+            UserId = changeRecord.UserId,
+            SpendingGroupName = changeRecord.SpendingGroup?.Name ?? string.Empty
         };
 
     public static ChangeRecord ToModel(this ChangeRecordDto changeRecord)