From e64b5906da8b7321c6b3d502a46e6c07cb9b1960 Mon Sep 17 00:00:00 2001
From: claude_dev <claude-dev@sanguo.local>
Date: Sat, 1 Aug 2026 16:56:26 +0800
Subject: [PATCH] =?UTF-8?q?fix(portfolio-backtest):=20=E5=87=80=E5=80=BC?=
 =?UTF-8?q?=E6=9B=B2=E7=BA=BF=20echarts=20=E7=A9=BA=E7=99=BD=20-=20watch?=
 =?UTF-8?q?=E6=BC=8F=E8=A7=A6=E5=8F=91=E6=89=8B=E5=8A=A8=E5=85=9C=E5=BA=95?=
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根因(浏览器实证): onSubmit 异步轮询 done 后 result/equityCurve 同帧赋值,
v-if result 块(含 chart-box div)此帧才挂载, watch(equityCurve, flush:post)
在该时序下漏触发 renderEquity → echarts 从未 init(chart-box 无 _echarts_instance_)。
手动 echarts.init+setOption 实证容器/echarts/数据全正常(37点),纯 watch 触发遗漏。

修复: equityCurve 赋值后 await nextTick()(等 chart-box 挂载)+ 手动 renderEquity()兜底。
watch 保留(双保险, ensureChart 幂等)。
---
 frontend/src/views/backtest/PortfolioBacktest.vue | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/frontend/src/views/backtest/PortfolioBacktest.vue b/frontend/src/views/backtest/PortfolioBacktest.vue
index 3c1e26f..6a17b8c 100644
--- a/frontend/src/views/backtest/PortfolioBacktest.vue
+++ b/frontend/src/views/backtest/PortfolioBacktest.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, reactive, onMounted, onUnmounted, watch } from 'vue'
+import { ref, reactive, onMounted, onUnmounted, watch, nextTick } from 'vue'
 import { ElMessage } from 'element-plus'
 import type { EChartsCoreOption } from 'echarts'
 import { useChart } from '@/composables/useChart'
@@ -126,6 +126,11 @@ async function onSubmit(): Promise<void> {
     trades.value = r.trades || []
     metrics.value = r.metrics || null
     period.value = r.period || null
+    // v-if result 块(含 chart-box div)在此帧才挂载, watch(equityCurve, flush:post)
+    // 在异步轮询 done 后赋值时序下会漏触发 echarts.init → 净值曲线空白。
+    // nextTick 等 chart-box 挂载后手动渲染兜底。
+    await nextTick()
+    renderEquity()
     ElMessage.success(
       `回测完成: ${r.period?.trading_days ?? 0} 交易日, 选股 ${(r.stocks_selected || []).length} 只`,
     )