fix: history stock name truncate [Issue: #815]

apps/dsa-web/src/components/history/HistoryListItem.tsx

@@ -3,6 +3,7 @@ import { Badge } from '../common';
 import type { HistoryItem } from '../../types/analysis';
 import { getSentimentColor } from '../../types/analysis';
 import { formatDateTime } from '../../utils/format';
+import { truncateStockName, isStockNameTruncated } from '../../utils/stockName';
 
 interface HistoryListItemProps {
   item: HistoryItem;
@@ -42,6 +43,8 @@ export const HistoryListItem: React.FC<HistoryListItemProps> = ({
   onClick,
 }) => {
   const sentimentColor = item.sentimentScore !== undefined ? getSentimentColor(item.sentimentScore) : null;
+  const stockName = item.stockName || item.stockCode;
+  const isTruncated = isStockNameTruncated(stockName);
 
   return (
     <div className="flex items-start gap-2 group">
@@ -61,7 +64,7 @@ export const HistoryListItem: React.FC<HistoryListItemProps> = ({
           isViewing ? 'home-history-item-selected' : ''
         }`}
       >
-        <div className="flex items-center gap-2.5 relative z-10">
+        <div className={`flex items-center gap-2.5 relative z-10${isTruncated ? ' group-hover/item:z-20' : ''}`}>
           {sentimentColor && (
             <div
               className="w-1 h-8 rounded-full flex-shrink-0"
@@ -75,14 +78,19 @@ export const HistoryListItem: React.FC<HistoryListItemProps> = ({
             <div className="flex items-start justify-between gap-2">
               <div className="min-w-0 flex-1">
                 <span className="truncate text-sm font-semibold text-foreground tracking-tight">
-                  {item.stockName || item.stockCode}
+                  <span className="group-hover/item:hidden">
+                    {truncateStockName(stockName)}
+                  </span>
+                  <span className="hidden group-hover/item:inline">
+                    {stockName}
+                  </span>
                 </span>
               </div>
               {sentimentColor && (
                 <Badge
                   variant="default"
                   size="sm"
-                  className="home-history-sentiment-badge shrink-0 shadow-none text-[11px] font-semibold leading-none"
+                  className={`home-history-sentiment-badge shrink-0 shadow-none text-[11px] font-semibold leading-none transition-opacity duration-200${isTruncated ? ' group-hover/item:opacity-80' : ''}`}
                   style={{
                     color: sentimentColor,
                     borderColor: `${sentimentColor}30`,

apps/dsa-web/src/components/history/__tests__/HistoryList.test.tsx

@@ -27,6 +27,16 @@ const items: HistoryItem[] = [
   },
 ];
 
+const longChineseNameItem: HistoryItem = {
+  id: 2,
+  queryId: 'q-2',
+  stockCode: '600519',
+  stockName: '贵州茅台股票股份有限公司',
+  sentimentScore: 75,
+  operationAdvice: '持有',
+  createdAt: '2026-03-16T08:00:00Z',
+};
+
 describe('HistoryList', () => {
   it('shows the empty state copy when no history exists', () => {
     const { container } = render(<HistoryList {...baseProps} items={[]} />);
@@ -84,6 +94,22 @@ describe('HistoryList', () => {
     expect(screen.getByRole('button', { name: '删除' })).toBeDisabled();
   });
 
+  it('truncates long stock names with trailing dot', () => {
+    render(
+      <HistoryList
+        {...baseProps}
+        items={[longChineseNameItem]}
+      />,
+    );
+
+    // '贵州茅台股票股份有限公司' (12 Chinese chars) should be truncated to '贵州茅台股票股份.' (8 chars + dot)
+    // The full name exists in a hidden span, visible on hover
+    expect(screen.getByText('贵州茅台股票股份.')).toBeInTheDocument();
+    const fullNameHidden = screen.queryByText('贵州茅台股票股份有限公司');
+    expect(fullNameHidden).toBeInTheDocument();
+    expect(fullNameHidden).toHaveClass('hidden');
+  });
+
   it('generates unique select-all ids across multiple instances', () => {
     const { container } = render(
       <>

apps/dsa-web/src/utils/__tests__/stockName.test.ts

@@ -0,0 +1,119 @@
+import {
+  truncateStockName,
+  isStockNameTruncated,
+  STOCK_NAME_MAX_LENGTH,
+} from '../stockName';
+import { describe, expect, test } from 'vitest';
+
+describe('truncateStockName', () => {
+  describe('English strings', () => {
+    test('returns unchanged when at or below 15 chars', () => {
+      expect(truncateStockName('Apple')).toBe('Apple');
+      expect(truncateStockName('AAPL')).toBe('AAPL');
+      expect(truncateStockName('123456789012345')).toBe('123456789012345');
+    });
+
+    test('truncates to 15 chars with trailing dot', () => {
+      expect(truncateStockName('Apple Computer Inc.')).toBe('Apple Computer .');
+      expect(truncateStockName('1234567890123456')).toBe('123456789012345.');
+    });
+
+    test('truncates very long English strings', () => {
+      expect(truncateStockName('VeryLongStockNameCorporation')).toBe('VeryLongStockNa.');
+    });
+  });
+
+  describe('Chinese strings', () => {
+    test('returns unchanged when at or below 8 chars', () => {
+      expect(truncateStockName('贵州茅台')).toBe('贵州茅台');
+      expect(truncateStockName('腾讯控股')).toBe('腾讯控股');
+    });
+
+    test('truncates to 8 chars with trailing dot', () => {
+      // 贵州茅台股票有限公司: 10 Chinese chars -> slice(0,8) + dot = 8 ch + dot
+      expect(truncateStockName('贵州茅台股票有限公司')).toBe('贵州茅台股票有限.');
+      // 中华人民共和国ABCD: mixed, 11 chars > 10 → truncate to '中华人民共和国ABC.'
+      expect(truncateStockName('中华人民共和国ABCD')).toBe('中华人民共和国ABC.');
+    });
+  });
+
+  describe('Mixed Chinese and English strings', () => {
+    test('returns unchanged when at or below 10 chars', () => {
+      expect(truncateStockName('茅台A')).toBe('茅台A');
+      expect(truncateStockName('腾讯控股HK')).toBe('腾讯控股HK');
+    });
+
+    test('truncates to 10 chars with trailing dot', () => {
+      // 贵州茅台股票有限公司AB: 10 Chinese + 2 English = 12 mixed -> slice(0,10) + dot
+      // First 10: 贵 州 茅 台 股 票 有 限 公 司 = 8 ch + 2 en
+      expect(truncateStockName('贵州茅台股票有限公司AB')).toBe('贵州茅台股票有限公司.');
+      // 腾讯控股00700H: 4 Chinese + 6 English = 10 mixed -> no truncation (10 <= 10)
+      expect(truncateStockName('腾讯控股00700H')).toBe('腾讯控股00700H');
+    });
+  });
+
+  describe('edge cases', () => {
+    test('returns empty string unchanged', () => {
+      expect(truncateStockName('')).toBe('');
+    });
+
+    test('handles stock code only (no Chinese)', () => {
+      expect(truncateStockName('600519.SH')).toBe('600519.SH');
+      expect(truncateStockName('00700.HK')).toBe('00700.HK');
+    });
+
+    test('handles single character strings', () => {
+      expect(truncateStockName('A')).toBe('A');
+      expect(truncateStockName('茅')).toBe('茅');
+    });
+
+    test('handles strings with only numbers and symbols', () => {
+      expect(truncateStockName('600519')).toBe('600519');
+      expect(truncateStockName('2026-03-24')).toBe('2026-03-24');
+    });
+
+    test('returns undefined unchanged (but should not happen in practice)', () => {
+      // The function checks falsy, so empty string is handled, but non-string values
+      // would behave unexpectedly - this documents current behavior
+      expect(truncateStockName('' as unknown as string)).toBe('');
+    });
+  });
+
+  describe('isStockNameTruncated', () => {
+    test('returns false for empty string', () => {
+      expect(isStockNameTruncated('')).toBe(false);
+    });
+
+    test('returns false for names at or below max length', () => {
+      expect(isStockNameTruncated('Apple')).toBe(false);
+      expect(isStockNameTruncated('贵州茅台')).toBe(false);
+      expect(isStockNameTruncated('茅台A')).toBe(false);
+    });
+
+    test('returns true for English names exceeding 15 chars', () => {
+      expect(isStockNameTruncated('Apple Computer Inc.')).toBe(true);
+      expect(isStockNameTruncated('VeryLongStockNameCorporation')).toBe(true);
+    });
+
+    test('returns true for Chinese names exceeding 8 chars', () => {
+      expect(isStockNameTruncated('贵州茅台股票股份有限公司')).toBe(true);
+    });
+
+    test('returns true for mixed names exceeding 10 chars', () => {
+      expect(isStockNameTruncated('贵州茅台股票有限公司AB')).toBe(true);
+    });
+
+    test('returns false for stock codes at boundary', () => {
+      expect(isStockNameTruncated('600519.SH')).toBe(false);
+      expect(isStockNameTruncated('00700.HK')).toBe(false);
+    });
+  });
+
+  describe('STOCK_NAME_MAX_LENGTH constant', () => {
+    test('has correct values', () => {
+      expect(STOCK_NAME_MAX_LENGTH.ENGLISH).toBe(15);
+      expect(STOCK_NAME_MAX_LENGTH.CHINESE).toBe(8);
+      expect(STOCK_NAME_MAX_LENGTH.MIXED).toBe(10);
+    });
+  });
+});

apps/dsa-web/src/utils/stockName.ts

@@ -0,0 +1,46 @@
+/**
+ * Stock name truncation configuration
+ * English characters: 15 chars max
+ * Chinese characters: 8 chars max
+ * Mixed (Chinese + English): 10 chars max
+ */
+export const STOCK_NAME_MAX_LENGTH = {
+  ENGLISH: 15,
+  CHINESE: 8,
+  MIXED: 10,
+} as const;
+
+/**
+ * Get max allowed length for a stock name based on character type
+ * - Pure English: 15 chars
+ * - Pure Chinese: 8 chars
+ * - Mixed: 10 chars
+ */
+function getMaxLength(name: string): number {
+  const isChinese = /[\u4e00-\u9fa5]/.test(name);
+  const isMixed = isChinese && /[a-zA-Z]/.test(name);
+  if (isMixed) return STOCK_NAME_MAX_LENGTH.MIXED;
+  if (isChinese) return STOCK_NAME_MAX_LENGTH.CHINESE;
+  return STOCK_NAME_MAX_LENGTH.ENGLISH;
+}
+
+/**
+ * Truncate stock name based on character type
+ * - Pure English: max 15 characters
+ * - Pure Chinese: max 8 characters
+ * - Mixed: max 10 characters
+ */
+export function truncateStockName(name: string): string {
+  if (!name) return name;
+  const maxLen = getMaxLength(name);
+  if (name.length <= maxLen) return name;
+  return name.slice(0, maxLen) + '.';
+}
+
+/**
+ * Check if stock name will be truncated
+ */
+export function isStockNameTruncated(name: string): boolean {
+  if (!name) return false;
+  return name.length > getMaxLength(name);
+}

docs/CHANGELOG.md

@@ -32,6 +32,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
 - 🔢 **A 股同码实时行情保留交易所提示**（fixes #852）— `DataFetcherManager` 与 `TushareFetcher` 现在会保留 `SZ000001` / `000001.SZ` 这类显式沪深提示，旧版 Tushare 实时行情降级分支不再把深市 `000001` 误判成 `sh000001` 上证指数。
 - 🎯 **多 Agent 次优买点不再盲目复制理想买点**（fixes #851）— 当多智能体结果缺少独立 `secondary_buy` 时，仪表盘现在优先展示 `N/A` 而不是把 fallback 值硬拷贝成与 `ideal_buy` 完全相同，减少误导性的双买点展示。
 - 🧩 **Tushare 初始化不再强依赖本地 SDK 包** — `TushareFetcher` 现在直接使用内置 HTTP client 访问 Tushare Pro，不再在启动阶段先 `import tushare` 才能初始化；修复了 Docker、桌面打包或环境重建后因缺少 `tushare` 包而提前报 `No module named 'tushare'` 的问题，并补充对应回归测试。
+- 🖥️ **历史列表过长股票名称截断与悬停展示**（fixes #815）— 历史列表中过长的股票名称, 现在会按字符类型自动截断（英文15/中文8/混合10字符），默认显示截断结果，悬停时展示完整名称；解决 1920x1080 分辨率下股票名称与右侧状态标签文字重叠的问题。新增 `stockName.ts` 工具函数并补充对应测试。
 
 ## [3.10.1] - 2026-03-24