refactor: 重构 Community 目录，将公共组件迁移到 src/components/

- 迁移 klineDataCache.js 到 src/utils/stock/（被 StockChart 使用）
- 迁移 InvestmentCalendar 到 src/components/InvestmentCalendar/（被 Navbar、Dashboard 使用）
- 迁移 DynamicNewsDetail 到 src/components/EventDetailPanel/（被 EventDetail 使用）
- 更新所有相关导入路径，使用路径别名
- 保持 Community 目录其余结构不变

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

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

src/views/Dashboard/components/CalendarPanel.tsx

@@ -29,7 +29,7 @@ import type { InvestmentEvent } from '@/types';
 import './InvestmentCalendar.less';
 
 // 懒加载投资日历组件
-const InvestmentCalendar = lazy(() => import('@/views/Community/components/InvestmentCalendar'));
+const InvestmentCalendar = lazy(() => import('@components/InvestmentCalendar'));
 
 dayjs.locale('zh-cn');