perf(FinancialPanorama): Tab 组件添加 memo 优化

- MetricsCategoryTab: 使用共享主题，主组件和 7 个子组件添加 memo
- BalanceSheetTab: 添加 memo
- IncomeStatementTab: 添加 memo
- CashflowTab: 添加 memo
- FinancialMetricsTab: 添加 memo
- 减少不必要的重渲染

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

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

src/views/Company/components/FinancialPanorama/tabs/CashflowTab.tsx

@@ -2,7 +2,7 @@
  * 现金流量表 Tab
  */
 
-import React from 'react';
+import React, { memo } from 'react';
 import { Box, VStack, HStack, Heading, Badge, Text, Spinner, Center } from '@chakra-ui/react';
 import { CashflowTable } from '../components';
 import type { CashflowData } from '../types';
@@ -19,7 +19,7 @@ export interface CashflowTabProps {
   hoverBg: string;
 }
 
-const CashflowTab: React.FC<CashflowTabProps> = ({
+const CashflowTabInner: React.FC<CashflowTabProps> = ({
   cashflow,
   loading,
   showMetricChart,
@@ -72,4 +72,5 @@ const CashflowTab: React.FC<CashflowTabProps> = ({
   );
 };
 
+const CashflowTab = memo(CashflowTabInner);
 export default CashflowTab;