当一排待办事项中有个有子级，其他无子级的标注完成，或者回车新建其他事项，都会使事项前面出现折叠符号，并能折叠该事项。
System Info
- App Version: 1.1.66
- Platform: Windows Windows 11 Enterprise (10.0.26200) x64
- Electron / Chrome: 36.9.5 / 136.0.7103.177
- CPU: Intel(R) Core(TM) i9-10900F CPU @ 2.80GHz x20
- Memory: 14.6 GB free / 31.9 GB
- Displays: 1920x1080@1x, 1920x1080@1x
- System Locale: zh-CN
- App Language: zh
- Theme: dark
- Signed In: yes
- Current Page: app://./zh/flow/?whiteboardId=006d521e-2cc1-4117-8766-7b82424c6e17
- Window: 1920x1078@1x
- Time: 2026-11-02T07:13:23.954Z (Asia/Shanghai)
