status: passed

# Verification

- [x] suggestion hover shows dropdown children
- [x] dropdown item hover shows tooltip(detail)
- [x] suggestion click bootstraps all child ids
- [x] dropdown item click bootstraps only selected id
- [x] bootstrap start updates sessionStorage
- [x] TypeScript check passed

## Residual Risk

- 未在本地启动浏览器进行可视化手动回归；建议在真实页面快速 smoke test 一次。