feature(结算): 扣费逻辑优化

service/settle_account_bill/settle_account_bill.go

@@ -84,7 +84,7 @@ func (s Service) Settle(req accountModel.AccountBillSettleReq, user request.User
 		return err
 	}
 
-	_, err = tx.Update("base_account", fmt.Sprintf("Surplus=Surplus-%v,Available=Available-%v", req.Amount, req.Amount), fmt.Sprintf("Id='%v'", req.Amount))
+	_, err = tx.Update("base_account", fmt.Sprintf("Surplus=Surplus-%v", req.Amount), fmt.Sprintf("Id='%v'", req.Amount))
 	if err != nil {
 		tx.Rollback()
 		return err