#EQD-6597 国联民生-簿记时新增基本费率字段（开平仓费用），并且自动计算

feat: 完善互换平仓交易费用自动计算

- 支持百分比和单位数量模式自动计算平仓交易费用
- 支持全部平仓和部分平仓联动重算
- 保持手动互换不自动填充平仓交易费用
- 补充前后端相关单测

YLErpDAL/Modules/SwapModule/SwapDealService.cs

@@ -291,6 +291,9 @@ namespace YLErp.Modules.SwapModule
                     floatEvent.UnderlyingInstrumentType = position.UnderlyingInstrumentType;
                     floatEvent.CloseFee = 0;
                     floatEvent.BeforeCloseFee = oriPosition.PosiTradingFeePending;
+                    floatEvent.TradingFee = CalcInitTradingFee(oriPosition, unwindData);
+                    floatEvent.PosiTradingFeeUnit = oriPosition?.PosiTradingFeeUnit ?? 0;
+                    floatEvent.PosiFeeType = oriPosition?.PosiFeeType ?? 0;
                     floatEvent.MarkClosePnl = 0;
                     floatEvent.PayDirection = position.PosiDirection;
                     floatEvent.PosiGrossPrice = position.PosiGrossPrice;
@@ -313,6 +316,20 @@ namespace YLErp.Modules.SwapModule
             }
             return unwindData;
         }
+        private static decimal CalcInitTradingFee(swap_position oriPosition, UnwindData unwindData)
+        {
+            if (oriPosition == null || unwindData == null)
+            {
+                return 0;
+            }
+
+            if (oriPosition.PosiFeeType == 1)
+            {
+                return Math.Round(oriPosition.PosiTradingFeeUnit * unwindData.CloseQty, ConsGlobal.MoneyRound, MidpointRounding.AwayFromZero);
+            }
+
+            return Math.Round(oriPosition.PosiTradingFeeUnit / 100m * unwindData.CloseNotionalValue, ConsGlobal.MoneyRound, MidpointRounding.AwayFromZero);
+        }
         /// <summary>
         /// 校验上日是否收盘
         /// </summary>

YLErpDAL/Modules/SwapModule/SwapTradeService.cs

@@ -1375,6 +1375,7 @@ namespace YLErp.Modules.SwapModule
                 position.PosiTradingFee = swap.PosiTradingFee;
                 position.PosiTradingFee=Math.Round(position.PosiTradingFee, ConsGlobal.MoneyRound, MidpointRounding.AwayFromZero);
                 position.PosiTradingFeeUnit = swap.PosiTradingFeeUnit;
+                position.PosiFeeType = swap.PosiFeeType;
                 position.PosiTradingFeePending = swap.PosiTradingFeePending;
                 position.PosiTradingFeePending = Math.Round(position.PosiTradingFeePending, ConsGlobal.MoneyRound, MidpointRounding.AwayFromZero);
                 position.UnderlyingCode = swap.UnderlyingCode;