refactor(Company): 统一所有 Tab 的 loading 状态组件

- 创建共享的 LoadingState 组件（黑金主题）
- DeepAnalysisTab: 使用统一 LoadingState 替换蓝色 Spinner
- FinancialPanorama: 使用 LoadingState 替换 Skeleton
- MarketDataView: 使用 LoadingState 替换自定义 Spinner
- ForecastReport: 使用 LoadingState 替换 Skeleton 骨架屏

所有一级 Tab 现在使用一致的金色 Spinner + 加载提示文案

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

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

src/views/Company/components/ForecastReport/index.tsx

@@ -3,15 +3,15 @@
  */
 
 import React, { useState, useEffect, useCallback } from 'react';
-import { Box, SimpleGrid, Skeleton } from '@chakra-ui/react';
+import { Box, SimpleGrid } from '@chakra-ui/react';
 import { stockService } from '@services/eventService';
 import {
   IncomeProfitGrowthChart,
   EpsChart,
   PePegChart,
   DetailTable,
-  ChartCard,
 } from './components';
+import LoadingState from '../LoadingState';
 import { CHART_HEIGHT } from './constants';
 import type { ForecastReportProps, ForecastData } from './types';
 
@@ -49,15 +49,9 @@ const ForecastReport: React.FC<ForecastReportProps> = ({ stockCode: propStockCod
 
   return (
     <Box>
-      {/* 加载骨架屏 */}
+      {/* 加载状态 */}
       {loading && !data && (
-        <SimpleGrid columns={{ base: 1, md: 3 }} spacing={4}>
-          {[1, 2, 3].map((i) => (
-            <ChartCard key={i} title="加载中...">
-              <Skeleton height={`${CHART_HEIGHT}px`} />
-            </ChartCard>
-          ))}
-        </SimpleGrid>
+        <LoadingState message="加载盈利预测数据中..." height="300px" />
       )}
 
       {/* 图表区域 - 3列布局 */}