feat(MarketDashboard): 新增投资仪表盘组件

- 指数卡片组件（带迷你面积图）
- 成交额柱状图、涨跌分布图组件
- 热门板块排行组件
- 毛玻璃背景，黑金配色

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

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

src/views/Profile/components/MarketDashboard/index.js

@@ -0,0 +1,3 @@
+// MarketDashboard 组件导出
+export { default } from './MarketDashboard';
+export { default as MarketDashboard } from './MarketDashboard';