[Feature] Javascript injection in same manner as css injection

[plans-coding]

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request.

• Yes

The feature

In the settings for Immich it is possible to inject Custom CSS. Would it be possible to add support for injection of Custom Javascript too? It would be very helpful in many situations for different integrations.

Platform

• Server
• Web
• Mobile

[1661410107114145152525]

Would be really great, I currently play around with browsers that allow custom JS but it is quite annoying on mobile and needs userscript managers to be installed on every device.