Message HTML export produces a ~1MB CSS file #19441
Description
Steps to reproduce
When exporting 1MB of messages from a room through the 'Export chat' button in the sidebar, the resulting export ends up being 40KB of message history, 180KB of images and 884KB of CSS.
> ls
css js messages.html room.png users
> du -hd 1 *
884K css
4.0K js
40K messages.html
4.0K room.png
180K users
Outcome
What did you expect?
More messages, less CSS.
What happened instead?
I only noticed this when trying to debug #19436, going into the CSS file and being met with a very large file, one that dwarfs the others in my chat export.
Going out on a limb, I'm guessing this may be because the chat export feature simply takes the resulting CSS bundle from Element and simply exports that? I suppose that works and is low maintenance, but is does mean the export format will change occasionally and not deliberately.
Operating system
Arch Linux
Application version
Element Nightly version: 2021100901, Olm version: 3.2.3
How did you install the app?
The AUR
Homeserver
No response
Will you send logs?
No