refactor: Community 目录结构重组 + 修复导入路径 + 添加 Mock 数据

## 目录重构
- DynamicNewsCard/ → DynamicNews/（含 layouts/, hooks/ 子目录）
- EventCard 原子组件 → EventCard/atoms/
- EventDetailModal 独立目录化
- HotEvents 独立目录化（含 CSS）
- SearchFilters 独立目录化（CompactSearchBox, TradingTimeFilter）

## 导入路径修复
- EventCard/*.js: 统一使用 @constants/, @utils/, @components/ 别名
- atoms/*.js: 修复移动后的相对路径问题
- DynamicNewsCard.js: 更新 contexts, store, constants 导入
- EventHeaderInfo.js, CompactMetaBar.js: 修复 EventFollowButton 导入

## Mock Handler 添加
- /api/events/:eventId/expectation-score - 事件超预期得分
- /api/index/:indexCode/realtime - 指数实时行情

## 警告修复
- CitationMark.js: overlayInnerStyle → styles (Antd 5.x)
- CitedContent.js: 移除不支持的 jsx 属性

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

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

src/views/Community/components/DynamicNews/index.js

@@ -0,0 +1,21 @@
+// src/views/Community/components/DynamicNews/index.js
+// 动态新闻模块
+
+// 主组件
+export { default as DynamicNewsCard } from './DynamicNewsCard';
+
+// 布局组件
+export { default as VerticalModeLayout } from './layouts/VerticalModeLayout';
+export { default as VirtualizedFourRowGrid } from './layouts/VirtualizedFourRowGrid';
+
+// 子组件
+export { default as EventScrollList } from './EventScrollList';
+export { default as EventDetailScrollPanel } from './EventDetailScrollPanel';
+export { default as ModeToggleButtons } from './ModeToggleButtons';
+export { default as PaginationControl } from './PaginationControl';
+
+// Hooks
+export { usePagination } from './hooks/usePagination';
+
+// 常量
+export * from './constants';