From 1886c54e0f23ca1fee70af75ffd06c6ce9040a18 Mon Sep 17 00:00:00 2001
From: zdl <3489966805@qq.com>
Date: Thu, 30 Oct 2025 18:59:49 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=20StockOverview=20pre?=
 =?UTF-8?q?vStats=20=E6=9C=AA=E5=AE=9A=E4=B9=89=E9=94=99=E8=AF=AF?=
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## 问题
控制台报错：
```
ReferenceError: prevStats is not defined
    at fetchMarketStats (index.js:247:1)
```

## 根本原因
`fetchMarketStats` 函数中引用了不存在的变量 `prevStats`：
```javascript
// ❌ 错误代码
const newStats = {
  ...data.summary,
  rising_count: prevStats?.rising_count,
  falling_count: prevStats?.falling_count,
  date: data.trade_date
};
```

这里的 `prevStats` 变量从未定义或声明。

## 解决方案
使用状态变量 `marketStats` 来获取之前的值：
```javascript
// ✅ 正确代码
const newStats = {
  ...data.summary,
  rising_count: marketStats?.rising_count,
  falling_count: marketStats?.falling_count,
  date: data.trade_date
};
```

## 影响
- ✅ 修复市场统计数据加载错误
- ✅ 正确保留上涨/下跌家数
- ✅ 消除控制台 ReferenceError

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 src/views/StockOverview/index.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/views/StockOverview/index.js b/src/views/StockOverview/index.js
index a751fbd5..52da86e9 100644
--- a/src/views/StockOverview/index.js
+++ b/src/views/StockOverview/index.js
@@ -244,8 +244,8 @@ const StockOverview = () => {
         const newStats = {
           ...data.summary,
           // 保留之前从 heatmap 接口获取的上涨/下跌家数
-          rising_count: prevStats?.rising_count,
-          falling_count: prevStats?.falling_count,
+          rising_count: marketStats?.rising_count,
+          falling_count: marketStats?.falling_count,
           date: data.trade_date
         };
         setMarketStats(newStats);