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/CompanyOverview/DeepAnalysisTab/index.tsx

@@ -11,9 +11,10 @@
  */
 
 import React, { useMemo } from 'react';
-import { Card, CardBody, Center, VStack, Spinner, Text } from '@chakra-ui/react';
+import { Card, CardBody } from '@chakra-ui/react';
 import { FaBrain, FaBuilding, FaLink, FaHistory } from 'react-icons/fa';
 import SubTabContainer, { type SubTabConfig } from '@components/SubTabContainer';
+import LoadingState from '../../LoadingState';
 import { StrategyTab, BusinessTab, ValueChainTab, DevelopmentTab } from './tabs';
 import type { DeepAnalysisTabProps, DeepAnalysisTabKey } from './types';
 
@@ -75,12 +76,7 @@ const DeepAnalysisTab: React.FC<DeepAnalysisTabProps> = ({
             componentProps={{}}
             themePreset="blackGold"
           />
-          <Center h="200px">
-            <VStack spacing={4}>
-              <Spinner size="xl" color="blue.500" />
-              <Text color="gray.400">加载数据中...</Text>
-            </VStack>
-          </Center>
+          <LoadingState message="加载数据中..." height="200px" />
         </CardBody>
       </Card>
     );