refactor: 重构 StockDetailPanel 目录结构，清理未使用代码

- 将 MiniTimelineChart 和 useEventStocks 迁移到 src/components/Charts/Stock/
- 更新 DynamicNewsDetailPanel 和 StockListItem 的导入路径
- 删除未使用的 SearchBox.js 和 useSearchEvents.js（约 300 行）
- 建立统一的股票图表组件目录结构

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

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

src/components/EventDetailPanel/DynamicNewsDetailPanel.js

@@ -16,7 +16,7 @@ import {
 } from '@chakra-ui/react';
 import { getImportanceConfig } from '@constants/importanceLevels';
 import { eventService } from '@services/eventService';
-import { useEventStocks } from '@views/Community/components/StockDetailPanel/hooks/useEventStocks';
+import { useEventStocks } from '@components/Charts/Stock';
 import { toggleEventFollow, selectEventFollowStatus } from '@store/slices/communityDataSlice';
 import { useAuth } from '@contexts/AuthContext';
 import EventHeaderInfo from './EventHeaderInfo';

src/components/EventDetailPanel/StockListItem.js

@@ -20,7 +20,7 @@ import { StarIcon } from '@chakra-ui/icons';
 import { Tag } from 'antd';
 import { RobotOutlined } from '@ant-design/icons';
 import { selectIsMobile } from '@store/slices/deviceSlice';
-import MiniTimelineChart from '@views/Community/components/StockDetailPanel/components/MiniTimelineChart';
+import { MiniTimelineChart } from '@components/Charts/Stock';
 import MiniKLineChart from './MiniKLineChart';
 import TimelineChartModal from '@components/StockChart/TimelineChartModal';
 import KLineChartModal from '@components/StockChart/KLineChartModal';