Style up the slide view.

[hackerwins]

Description:

Recently, we introduced a markdown editor and slide view. However, the style of the slide view is still crude.

For example, the text of the code is not displayed properly.

Let's style up the slide view.

Why:

• Users can use prettier slide view.

[hackerwins]

@nyanji00 This is an issue we discussed in our last meeting.

[mu-hun]

@hackerwins I am interested in this issue! Could you assign this issue to me? 👀