fix(swap): 修复预付金腿计息基数计算问题

- 在多个单元测试文件中添加InterestIncomeSum字段以保持数据一致性
- 修改GLMS20260105PartialCloseDividendBugTest测试，改进EOD快照验证逻辑
- 修复SwapDealService中预付金腿的orginPv计算逻辑，使用上一日保证金本金作为基准
- 更新SwapPositionComposeScenarioTest中的测试数据结构和利率设置
- 修正平仓日利息计算精度问题，使用Math.Round确保计算准确性

UnitTestProject/Modules/SwapModule/SwapPositionComposeScenarioTest.cs

@@ -85,13 +85,10 @@ namespace YLErp.Modules.SwapModule
                 List<swap_flow_event> closeList = null)
             {
                 LastInterestCalculationPositions = positions;
-                return positions.Select(position => new swap_flow_event
-                {
-                    PositionId = position.id,
-                    InterestPrincipal = 1000m,
-                    InterestRate = 0.01m,
-                    FloatRate = 0.01m
-                }).ToList();
+                return base.CalcSwapInterests(td, tradeExtend, valueDate, unwindDate,
+                    eodPositions, positions, posiNotionalValue, posiLongNotionalValue, posiShortNotionalValue,
+                    closePosiNotionalValue, closePrecent, eventType, tdClose, needPrice,
+                    grossPrice, orginPv, add, settment, newCalcLast, closeList);
             }
 
             public void ExecuteSwapPositionCompose(DateTime settleDate, DateTime preSettleDate)
@@ -328,7 +325,8 @@ namespace YLErp.Modules.SwapModule
                 id = initialPrepayId, SwapTradeId = SwapTradeId, PosiDirection = 0,
                 InterestDirection = (int)SwapDirectionEnum.收取,
                 InterestMode = (int)InterestModeEnum.初始预付金,
-                InterestPrincipalFix = 1000m, IsInitial = true, Invalid = false,
+                InterestPrincipalFix = 1000m, InterestRateDefault = 0.01m,
+                IsInitial = true, Invalid = false,
                 IsAnnualized = true,
                 PosiStartDate = SettleDate.AddDays(-1), PosiMatuirityDate = td.ExerciseDate.Value,
                 InterestSwapInterval = "[]"
@@ -356,7 +354,8 @@ namespace YLErp.Modules.SwapModule
                 EventType = (int)SwapEventTypeEnum.平仓,
                 EventDate = SettleDate, DataState = (int)SwapFlowDateStateEnum.完成,
                 InterestMode = (int)InterestModeEnum.初始预付金,
-                InterestPrincipal = 300m
+                InterestPrincipal = 300m,
+                InterestRate = 0.01m
             };
             var service = new TestableSwapEodService(
                 new List<trade> { td },
@@ -374,7 +373,9 @@ namespace YLErp.Modules.SwapModule
                 "实时腿已经扣减到700，日终不得再次按平仓比例扣减");
             Assert.AreEqual(700m, persistedPrepay.TdInterestPrincipal,
                 "平仓日预付金计息本金应立即切换为实时剩余本金");
-            Assert.AreEqual(700m * 0.01m / 365m, persistedPrepay.TdInterestIncome,
+            var expectedDailyInterest = Math.Round(700m * 0.01m / 365m,
+                12, MidpointRounding.AwayFromZero);
+            Assert.AreEqual(expectedDailyInterest, persistedPrepay.TdInterestIncome,
                 "平仓日新增利息应按实时剩余本金计算");
         }