[BUG] two vertical scrollbars in Chat

[Veraellyunjie]

No such issue in Android app.
On desktop (FireFox 123 and 119) the layout of Chat is:

<- Name       {Photo} A
--------------------- H
            message A H
message             H H
            message H H
message             V H
--------------------- H
Write a message...  > V

where <- Name {Photo}
and Write a message... >
parts aren't visible simultaneously, so you either see

<- Name       {Photo} A
--------------------- H
            message A H
message             H H
            message H H
message             V V

or by using the right scrollbar

            message A A
message             H H
            message H H
message             V H
--------------------- H
Write a message...  > V

Please make top and bottom parts always visible and remove the right scrollbar:

<- Name       {Photo}
---------------------
            message A
message             H
            message H
message             V
---------------------
Write a message...  >