Extend Theme via Interface #38883
Description
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Is your feature request related to a problem? Please describe.
With Nextcloud >25, theming was changed drastically, documentation is not present and based on my tests (and some comment in some nextcloud issue) I notice that actually there isn't any interface to extend theme capabilities.
We can create custom app and import/extend javascript or set app configuration (like color or other option as example in Breeze Theme or Pride theme) but if I want, for example, set a new Logo via theme and regenerate logo image, this is not possible becasue functions are not available.
Or, for example, if i want to change the foother section, like adding date or custom links and so on, via custom app actually is not possible (is still possible via /theme/<custom_theme>/defaults.php , that should be deprecated).
Describe the solution you'd like
Create a theme Interface or some extend solution, that can help us to extend theme functions or overwrite them
Describe alternatives you've considered
The alternative that we have are :
- create new app - force CSS for section like logo or background + usage of
occcommand to regerate logo and so on - create new app - force gobal css variable
Additional context
Add any other context or screenshots about the feature request here.