feat: StockQuoteCard 根据股票代码获取真实行情数据

- 新增 useStockQuote Hook 获取股票行情
- Company 页面使用 Hook 并传递数据给 StockQuoteCard
- StockQuoteCard 处理 null 数据显示骨架屏
- 股票代码变化时自动刷新行情数据

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

Co-Authored-By: Claude <noreply@anthropic.com>

src/views/Company/hooks/useStockQuote.js

@@ -0,0 +1,100 @@
+// src/views/Company/hooks/useStockQuote.js
+// 股票行情数据获取 Hook
+
+import { useState, useEffect } from 'react';
+import { stockService } from '@services/eventService';
+import { logger } from '@utils/logger';
+
+/**
+ * 将 API 响应数据转换为 StockQuoteCard 所需格式
+ */
+const transformQuoteData = (apiData, stockCode) => {
+  if (!apiData) return null;
+
+  return {
+    // 基础信息
+    name: apiData.name || apiData.stock_name || '未知',
+    code: apiData.code || apiData.stock_code || stockCode,
+    indexTags: apiData.index_tags || apiData.indexTags || [],
+
+    // 价格信息
+    currentPrice: apiData.current_price || apiData.currentPrice || apiData.close || 0,
+    changePercent: apiData.change_percent || apiData.changePercent || apiData.pct_chg || 0,
+    todayOpen: apiData.today_open || apiData.todayOpen || apiData.open || 0,
+    yesterdayClose: apiData.yesterday_close || apiData.yesterdayClose || apiData.pre_close || 0,
+    todayHigh: apiData.today_high || apiData.todayHigh || apiData.high || 0,
+    todayLow: apiData.today_low || apiData.todayLow || apiData.low || 0,
+
+    // 关键指标
+    pe: apiData.pe || apiData.pe_ttm || 0,
+    pb: apiData.pb || apiData.pb_mrq || 0,
+    marketCap: apiData.market_cap || apiData.marketCap || apiData.circ_mv || '0',
+    week52Low: apiData.week52_low || apiData.week52Low || 0,
+    week52High: apiData.week52_high || apiData.week52High || 0,
+
+    // 主力动态
+    mainNetInflow: apiData.main_net_inflow || apiData.mainNetInflow || 0,
+    institutionHolding: apiData.institution_holding || apiData.institutionHolding || 0,
+    buyRatio: apiData.buy_ratio || apiData.buyRatio || 50,
+    sellRatio: apiData.sell_ratio || apiData.sellRatio || 50,
+
+    // 更新时间
+    updateTime: apiData.update_time || apiData.updateTime || new Date().toLocaleString(),
+  };
+};
+
+/**
+ * 股票行情数据获取 Hook
+ *
+ * @param {string} stockCode - 股票代码
+ * @returns {Object} { data, isLoading, error, refetch }
+ */
+export const useStockQuote = (stockCode) => {
+  const [data, setData] = useState(null);
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState(null);
+
+  useEffect(() => {
+    if (!stockCode) {
+      setData(null);
+      return;
+    }
+
+    const fetchQuote = async () => {
+      setIsLoading(true);
+      setError(null);
+
+      try {
+        logger.debug('useStockQuote', '获取股票行情', { stockCode });
+        const quotes = await stockService.getQuotes([stockCode]);
+
+        // API 返回格式: { [stockCode]: quoteData }
+        const quoteData = quotes?.[stockCode] || quotes;
+        const transformedData = transformQuoteData(quoteData, stockCode);
+
+        logger.debug('useStockQuote', '行情数据转换完成', { stockCode, hasData: !!transformedData });
+        setData(transformedData);
+      } catch (err) {
+        logger.error('useStockQuote', '获取行情失败', err);
+        setError(err);
+        setData(null);
+      } finally {
+        setIsLoading(false);
+      }
+    };
+
+    fetchQuote();
+  }, [stockCode]);
+
+  // 手动刷新
+  const refetch = () => {
+    if (stockCode) {
+      setData(null);
+      // 触发 useEffect 重新执行
+    }
+  };
+
+  return { data, isLoading, error, refetch };
+};
+
+export default useStockQuote;