This is really annoying.
There’s no reason to be truncating filenames like this.
Chat context tabs should resize as needed to fit the available space (at least as an option.)
Also, the tooltip should better utilize the available space, and always show the full filename. The @ dropdown has the same size problem.
Bonus:
Zoom / font size for the chat window should really be independent. It’s usually too small, and hard to read at the preferred zoom level for viewing for editor windows.