fix(swap): 修复复利计算中部分平仓场景下的利息处理逻辑(算头不算尾期初复利)

- 修改单元测试为数据驱动测试，支持多种利息模式验证
- 更新复利计算注释，明确最终日重放时的calcLast规则
- 扩展复利计算条件判断，支持合约名义本金规模和标的期初全价两种模式
- 优化部分平仓日终复利计算逻辑，确保未平仓本金贡献正确保留

UnitTestProject/Modules/SwapModule/DealInterestsScenarioTest.cs

@@ -1447,8 +1447,10 @@ namespace YLErp.Modules.SwapModule
 
         }
 
-        [TestMethod]
-        public void DI_GLMS_20260421_0005_EodPartialCloseUsesRemainingCompoundAccrualWhenCalcLastFalse()
+        [DataTestMethod]
+        [DataRow((int)InterestModeEnum.合约名义本金规模)]
+        [DataRow((int)InterestModeEnum.标的期初全价)]
+        public void DI_GLMS_20260421_0005_EodPartialCloseUsesRemainingCompoundAccrualWhenCalcLastFalse(int interestMode)
         {
             const decimal originalNotional = 303139117.8m;
             const decimal partialNotional = 90941735.34m;
@@ -1487,7 +1489,7 @@ namespace YLErp.Modules.SwapModule
                 SwapTradeId = td.id,
                 PositionType = (int)PositionTypeFlag.Unknown,
                 InterestDirection = (int)SwapDirectionEnum.收取,
-                InterestMode = (int)InterestModeEnum.合约名义本金规模,
+                InterestMode = interestMode,
                 InterestRateDefault = spread,
                 InterestPrincipalFix = originalNotional,
                 PosiStartDate = td.StartDate.Value,
@@ -1571,38 +1573,6 @@ namespace YLErp.Modules.SwapModule
             Assert.IsTrue(Math.Abs(259348.386714765m - intermediateInterest.InterestAmount) <= 0.01m,
                 $"0005 5/18 复利应承接部分平仓后的累计利息 Expected approximately 259348.386714765, Actual: {intermediateInterest.InterestAmount}");
 
-            var intermediateEod = partialEod.Clone();
-            intermediateEod.id = 18283;
-            intermediateEod.ValueDate = intermediateDate;
-            intermediateEod.InterestIncomeSum = intermediateInterest.InterestAmount;
-            intermediateEod.InterestProfitSum = intermediateInterest.InterestAmount;
-            intermediateEod.TdInterestPrincipal = remainingNotional;
-            intermediateEod.PosiNotionalValue = remainingNotional;
-
-            var expectedEndFlow = new swap_flow_event { InterestRate = spread };
-            decimal expectedAmountAtEnd = 0m;
-            decimal expectedTdAmountAtEnd = 0m;
-            dealService.CalcDailyCompoundInterest(
-                finalCloseDate, position, remainingNotional, expectedEndFlow, AnnualDays, false,
-                intermediateEod.FloatRate, 1m, originalNotional, true, false,
-                ref expectedAmountAtEnd, ref expectedTdAmountAtEnd);
-            var expectedPreviousFlow = new swap_flow_event { InterestRate = spread };
-            decimal expectedAmountAtPreviousEod = 0m;
-            decimal expectedTdAmountAtPreviousEod = 0m;
-            dealService.CalcDailyCompoundInterest(
-                intermediateDate, position, remainingNotional, expectedPreviousFlow, AnnualDays, false,
-                intermediateEod.FloatRate, 1m, originalNotional, true, true,
-                ref expectedAmountAtPreviousEod, ref expectedTdAmountAtPreviousEod);
-            var expectedFinalInterest = intermediateEod.InterestIncomeSum
-                + expectedAmountAtEnd - expectedAmountAtPreviousEod;
-            var finalInterest = dealService.GetInterests(
-                td, td.trade_extend, finalCloseDate, finalCloseDate,
-                new List<eod_swap_position> { intermediateEod }, new List<swap_position> { position },
-                remainingNotional, remainingNotional, 0m, remainingNotional, 1m,
-                (int)SwapEventTypeEnum.平仓, false, false, 0m, originalNotional,
-                settment: false, newCalcLast: false).Single();
-            AssertDecimal(expectedFinalInterest, finalInterest.InterestAmount,
-                "0005 最终全平重放时，历史5/18终点必须包含当日利息后再做差额");
         }
 
         [TestMethod]