Extend manifest to also include /call/ url

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Is your feature request related to a problem? Please describe.
I like to use Talk as a standalone web app. Therefore, in Brave I'm using the feature to create a shortcut which opens Talk in it's own window without the location bar, buttons etc..
But when I switch into a chat, the URL changes from /apps/spreed/ to /call/, which in turn shows the annoying stripped down location indicator, that wants to tell me that I left my "app".

Describe the solution you'd like
Please extend the manifest to also include the /call/ URL or move it /apps/spreed/call/. I do not want to waste screen estate for that annoying bar.

Describe alternatives you've considered
If I had the time and expertise in this area, I would try to extend the manifest by myself.

Additional context

Start by locating the manifest that covers /apps/spreed/ and the routing entry for /call/. Check how the manifest's URL scope is applied when Talk switches into a call, then verify that opening both paths in the standalone window no longer shows the unwanted location indicator.