fix(types): 修复 ECharts 类型导出和组件类型冲突

- echarts.ts: 将 EChartsOption 改为 EChartsCoreOption 的类型别名
- FuiCorners: 移除 extends BoxProps，position 重命名为 corner
- KLineChartModal/TimelineChartModal/ConcentrationCard: 使用导入的 EChartsOption
- LoadingState: 新增骨架屏 variant 支持
- FinancialPanorama: 使用骨架屏加载状态
- useFinancialData/financialService: 优化数据获取逻辑
- Company/index: 简化组件结构

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

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

src/views/Company/components/CompanyOverview/components/shareholder/ConcentrationCard.tsx

@@ -99,7 +99,7 @@ const ConcentrationCard: React.FC<ConcentrationCardProps> = ({ concentration = [
         chartInstance.current = echarts.init(chartRef.current);
       }
 
-      const option: echarts.EChartsOption = {
+      const option: EChartsOption = {
         backgroundColor: "transparent",
         tooltip: {
           trigger: "item",