I noticed that if I enlarge the chat window, I cannot switch channels or close the window directly because those elements are missing. We are forced to shrink the window to see these options. For your information, I have the discussion button in the sidebar.
it is noted that when I enlarge the window, I cannot change the discussion channel or close the window. It is mandatory to reduce the window to perform these actions.
When using fullscreen, you are no longer in a “drawer” type window, but on a dedicated page. The same way as you would be on a regular topic. So the close button is indeed gone.
To switch back to forum mode, you can use the icon in the header: