[Feat]:figma布局借鉴

[chenshuichao]

Is your feature request related to a problem? Please describe. 设计画布，不对称，画布横向空间不够，特别是在笔记本上 Describe the solution you'd like 借鉴figma的布局空间，把左侧边栏收起变成菜单，帮助变成float button Describe alternatives you've considered

[mousheng]

左侧菜单没有修改的计划，我觉得还是挺方便，至于笔记本显示不够，可以快捷键切换是否显示，快捷键ctrl+B

[chenshuichao]

不对称啊😄，