feat(SubTabContainer): 支持自定义 Suspense fallback

- SubTabConfig 添加 fallback 属性
- 财务全景/盈利预测配置骨架屏 fallback
- 解决点击 Tab 先显示 Spinner 再显示骨架屏的问题

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

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

src/views/Company/config.ts

@@ -4,10 +4,14 @@
  * - Tab 配置
  */
 
-import { lazy } from 'react';
+import React, { lazy } from 'react';
 import { Building2, Brain, TrendingUp, Wallet, FileBarChart, Newspaper } from 'lucide-react';
 import type { CompanyTheme, TabConfig } from './types';
 
+// 骨架屏组件（同步导入，用于 Suspense fallback）
+import { FinancialPanoramaSkeleton } from './components/FinancialPanorama/components';
+import { ForecastSkeleton } from './components/ForecastReport/components';
+
 // ============================================
 // 黑金主题配置
 // ============================================
@@ -89,12 +93,14 @@ export const TAB_CONFIG: TabConfig[] = [
     name: '财务全景',
     icon: Wallet,
     component: FinancialPanorama,
+    fallback: React.createElement(FinancialPanoramaSkeleton),
   },
   {
     key: 'forecast',
     name: '盈利预测',
     icon: FileBarChart,
     component: ForecastReport,
+    fallback: React.createElement(ForecastSkeleton),
   },
   {
     key: 'tracking',