fix(frontend): CTA结果页补净值曲线图(零成交也出图)

Result.vue 拉了 equity-curve 数据却未画净值曲线;且 benchmark-curve/risk-series 依赖 *_metrics.json,CTA 引擎当前未生成该文件,致收益概述图全空。新增 EquityCurve.vue 走 equity-curve 接口(独立于 metrics.json,数据源 BacktestResult.equity_curve),零成交时画 N 天平线(初始资金不变),满足'有结果就有图'。vue-tsc RC=0。

frontend/src/views/backtest/Result.vue

@@ -14,6 +14,7 @@ import AlphaChart from '@/components/backtest/AlphaChart.vue'
 import BetaChart from '@/components/backtest/BetaChart.vue'
 import DrawdownChart from '@/components/backtest/DrawdownChart.vue'
 import VolatilityChart from '@/components/backtest/VolatilityChart.vue'
+import EquityCurve from '@/components/backtest/EquityCurve.vue'
 
 const route = useRoute()
 const taskId = String(route.params.id)
@@ -109,6 +110,12 @@ function filterDataByTimeRange<T extends { dates: string[] }>(data: T): T {
 const filteredBenchmarkCurve = computed(() => filterDataByTimeRange(benchmarkCurve.value))
 const filteredRiskSeries = computed(() => filterDataByTimeRange(riskSeries.value))
 
+// 净值曲线(走 equity-curve 接口,独立于 benchmark-curve)。benchmark-curve/risk-series
+// 依赖 *_metrics.json,CTA 引擎当前未生成该文件 → 收益概述图全空;equity-curve 直接
+// 来自 BacktestResult.equity_curve(零成交也有 N 天平线),单独画保证"有结果就有图"。
+const equityDates = computed(() => equity.value.map((e) => fmtDate(e.date)))
+const equityValues = computed(() => equity.value.map((e) => e.balance))
+
 onMounted(async () => {
   // 请求隔离：任一接口失败（如 benchmark-curve/risk-series 数据缺失）不得阻塞
   // 其余请求。statistics/equity/trades 有数据时必须正常渲染。用 Promise.allSettled
@@ -228,6 +235,9 @@ function fmtDate(d: string): string {
       <!-- Tab 1: 收益概述 -->
       <el-tab-pane label="收益概述">
         <div class="charts-container">
+          <el-card>
+            <EquityCurve :dates="equityDates" :equity="equityValues" />
+          </el-card>
           <el-card>
             <BenchmarkCurve
               :dates="filteredBenchmarkCurve.dates"