mermaid 流程图粘贴为 Whimsical 流程图。 
mermaid语法虽然方便且可以直接ai，但是确实不美观且修改起来比较不人性化，可以先用ai工具生成一个框架然后在人工优化 
eg： 
graph LR
A[User requests password reset]
B{Is the user registered?}
A --> B
B -- Yes --> C[Send password reset link to user's email]
C --> D[User receives password reset link]
B -- No --> E[Inform user that they are not registered]

[图片]