Ferdi: Add Universal Dark Mode

[vantezzen]

As suggested in https://www.reddit.com/r/opensource/comments/d6r8ma/franz_messenger_has_been_hardforked_by_the/f183uw0?utm_source=share&utm_medium=web2x.

Ferdi currently relies on recipe creators to create a custom darkmode.css file for each service to provide a dark mode.

We could add the functionality behind the "dark reader" extension to services that don't have a darkmode.css.

[Gaboris]

That or if full automation isn't possible or glitchy just add a method to manage the darkmode.css within Ferdi.

Basically if it's missing allow users to create one and if there is one then display its content in an editor so that we wouldn't have to navigate the Ferdi folders and try to figure out if we messed up or if Ferdi just doesn't find it by default.

[vantezzen]

I have now implemented darkreader into Ferdi via 1eb148d. Looks good to me but needs testing via the next beta build.

[Gaboris]

Wow, that was crazy fast. :D
Was it just some kinda "plug and play" type module?

[vantezzen]

Yes, DarkReader fortunately has an npm package that can simply be imported in the services webview to enable Darkmode.

[AGCaesar]

I just tried it out and the new dark mode messes with the discord service. The server icons are... darker than they should be, like an additional gray overlay. See here:https://i.imgur.com/HpAZ1AP.png
Top: Ferdi Dark mode
Bottom: Normal ferdi with discord dark mode
Should be the same
Whatsapp FB and telegram look fine on first glance

[vantezzen]

@AGCaesar Thank you for your feedback. I have now created a list of websites that it should not add DarkReader to and added Discord (b3a9cf4).

[AGCaesar]

Worked perfectly! Thanks!

[kytwb]

Shipped in v5.3.4-beta.2

[JordyScript]

DarkReader doesn't seem to be working on Google Calendar on my installation, neither does adding content to the darkmode.css for Google Calendar help.

Ferdi 5.4.0-beta.2
Windows 10

Should i open an issue, or is there a simple explanation?

EDIT: Same goes for Github btw.