devtools-overlay.css does not work unless explicitly loaded with Accept=text/css

[spthiel]

Description

When running an instance of the vue devtools with any form of proxy that modifies or omits the "Accept" header, the vue devtools will not work.

Expected behavior

Since vite transforms css files to javascript modules when requested without the text/css header, the css should be imported as module instead of being added to the dom on the fly.
This would prevent issues with proxies