优化

Src/Transforms/RestfulInvoice.cs

@@ -190,7 +190,7 @@ namespace Kivii.Finances.Transforms
                 invoice.OwnerName = info.OwnerName;
                 invoice.Currency = CurrencyUnit.CNY;
                 invoice.Type = info.Type;
-                invoice.Category = category.ToString();
+                invoice.Category = info.Category.IsNullOrEmpty() ? category.ToString() : info.Category;
                 invoice.OperateTime = info.OperateTime;
                 invoice.SerialCode = info.SerialCode ;
                 invoice.SerialNumber = info.SerialNumber;