HTML, Javascriptもminifyして欲しい

## 概要(Overview)
CSSはminifyされるが、HTML, Javascriptはminifyされないので、良い感じにminifyして欲しい。

## 期待する内容(Expect) or 要望 (Requirement)

minifyしてもjsのエラーとか出ない様に。

## 関連情報 (Ref)
ref: #2608 #4807

Start by reviewing the existing CSS minification path and the related issues #2608 and #4807. Determine where HTML and JavaScript assets are processed, then verify that minification completes without introducing JavaScript errors. Done means both asset types are minified safely in the relevant output.

Written by the indexing model from the issue text.