maybe some bugs about app.container、app.success、app.text

[yuezZYMSQTD]

I'm learning the blog example. Maybe I met some bugs about the widgets:
1、When using app.container(border=True), the page doesn't show the border.
2、When using app.success(f"Hello, username"), the page only shows raw text: Hello, username. However the purpose is to show bold text.
3、I wrote some contents in the text area with the enter key on computer keyboard. But when using app.text(post['content']) or app.markdown(post['content']) or app.write(post['content']), the page dosen't show the line breaks such as print("123\n456") in python console. Contents are shown only in one line.