Custom Library-like item through plugin?

[Donut]

Hello everyone,

i searched for an additional functionality for jellyfin and was not able to find a plugin that does what I need. So i planned to write my own plugin. I am having a hard time finding Information (docs/sample code) for plugin development. I read the entire plugin template readme, but didn't find the right starting point. I also had a look into the API.
What I want to achieve: 
I want to show additional cards on my dashboard which are linked to external websites. So pretty much the thing modifying the config.json from jellyfin-web does, but not as a link in the menu but as a card (with an assignable image etc.). In the plugin config you would then be adding cards with a Name and a (external) hyperlink.

Following this thread: https://forum.jellyfin.org/t-adding-to-t...light=link
this seems to impossible - is this correct?
What is not clear to me: a plugin like TVheadend does actually create a library-like card when it is installed. So it must be possible that a plugin creates something that leads to an entry on the dashboard.

My question is: Is this possible and if yes, what Interface has to be used?

Note: At the moment I have a solution where I create dummy libraries with no content and modify the hyperlink with tampermonkey javascript on the client side. I only need this functionality on the web interface.

[niels]

This is not possible. While plugins have _some_ functionality to provide semi-custom items they cannot change client behavior / UI like adding external links.