fix(ledger): 补全汇率折算乘数，修复跨币种直接相加导致的盈亏总额失真

src/actions/portfolio.ts

@@ -24,8 +24,12 @@ interface Position {
   realizedPnlCny: string;
   avgCost: string;
   dilutedCost: string;
+  dilutedCostCny: string;
   floatingPnl: string;
+  floatingPnlCny: string;
   accumulatedPnl: string;
+  accumulatedPnlCny: string;
+  marketValueCny: string;
   holdingDays: number;
   exchange: string;
   accumulatedDividendsCny: string;
@@ -326,6 +330,17 @@ export async function getPortfolioPositions(): Promise<Position[]> {
       holding.latestPrice
     );
 
+    // 获取资产对人民币的汇率
+    const fxRate = new Big(
+      getRate(rateMap, holding.baseCurrency, 'CNY') || '1'
+    );
+
+    // 将引擎返回的原生币种金额折算为 CNY
+    const marketValueCny = new Big(metrics.marketValue).times(fxRate).toString();
+    const floatingPnlCny = new Big(metrics.floatingPnl).times(fxRate).toString();
+    const accumulatedPnlCny = new Big(metrics.accumulatedPnl).times(fxRate).toString();
+    const dilutedCostCny = new Big(metrics.dilutedCost).times(fxRate).toString();
+
     const holdingNative = new Big(metrics.holdings);
     const avgCostNative = new Big(metrics.averageCost);
     const dilutedCostNative = new Big(metrics.dilutedCost);
@@ -370,8 +385,12 @@ export async function getPortfolioPositions(): Promise<Position[]> {
       realizedPnlCny: holding.realizedPnlCny.toString(),
       avgCost: metrics.averageCost,
       dilutedCost: metrics.dilutedCost,
+      dilutedCostCny,
       floatingPnl: metrics.floatingPnl,
+      floatingPnlCny,
       accumulatedPnl: metrics.accumulatedPnl,
+      accumulatedPnlCny,
+      marketValueCny,
       holdingDays,
       exchange: holding.exchange,
       accumulatedDividendsCny: holding.accumulatedDividendsCny.toString(),

src/actions/snapshots.ts

@@ -333,8 +333,16 @@ export async function reconstructPortfolioHistory() {
 
       const metrics = calculateAssetMetrics(assetTxs, cnyPrice);
 
-      totalValueCny = totalValueCny.plus(metrics.marketValue);
-      totalCostCny = totalCostCny.plus(metrics.totalInvested);
+      // 获取资产对人民币的汇率
+      const assetFxRate = new Big(getRate(baseCurrency, 'CNY') || '1');
+
+      // marketValue 已使用 CNY 价格计算，直接取用
+      // totalInvested 基于原始币种价格，需乘以汇率折算为 CNY
+      const posValueCny = new Big(metrics.marketValue);
+      const posCostCny = new Big(metrics.totalInvested).times(assetFxRate);
+
+      totalValueCny = totalValueCny.plus(posValueCny);
+      totalCostCny = totalCostCny.plus(posCostCny);
     }
 
     const existing = await db