관리자 페이지에서 플러그인을 직접 설치할 수 있는 시기는 언제인가요?

지원
2

I’m afraid this can’t be done via the UI, only via the command-line.

See this guide:

And as far as I know, there are no plans to add this feature in the next version (or ever?). IIRC plugins may need to interact with the database and other stuff in Ruby which is why it cannot be done via the UI.