feat(portfolio): 组合回测加持仓变化图(daily_positions每日聚合count/value经worker/routes透传,柱=持仓数线=市值)+超额收益曲线(策略/基准净值-1,聚宽标配,前端算);2测试 [vps]

frontend/src/api/portfolio.ts

@@ -71,6 +71,12 @@ export interface DrawdownPoint {
   drawdown: number
 }
 
+export interface HoldingsPoint {
+  date: string
+  count: number
+  value: number
+}
+
 export interface PortfolioBacktestResult {
   strategy: string
   period: { start: string; end: string; trading_days: number }
@@ -80,6 +86,7 @@ export interface PortfolioBacktestResult {
   metrics: PortfolioMetrics
   benchmark_curve?: BenchmarkPoint[]
   drawdown_curve?: DrawdownPoint[]
+  holdings_curve?: HoldingsPoint[]
   raw_summary?: Record<string, unknown>
 }