- FundTagCalc 全链路(LegAmount/LegFundPlan/UnwindTagSplit/TagRelease/MarginLegSettlement)金额类型改 decimal,消除 double 二进制误差在拆单倒挤、守恒校验中的分位尾差 - 边界处显式转换:writeCash 委托与 ClientCreditInoutService.Occupy/Release(仍 double)、GetAvailableCredit 返回值 (decimal) 强转 - SwapDealService.RecordMarginCashFlow/ReleaseMarginByFundTag 签名同步 decimal,测试桩 TestableSwapDealService 对齐 - 单测断言去掉 1e-6 容差(decimal 精确比较)