Yeah, we are getting to the point where you having a 4K monitor for your editor becomes a requirement rather than a "nice to have". Until now you have the agent, the editor and files/git/whatever, if you add a fourth panel to that, it becomes pretty cramped at lower resolutions. Fortunately, I do have a 4K monitor, but until now I used to have the editor on one half of it and another window (a browser most of the time) on the other half. So having to use the editor full screen is still slightly annoying.

Of course, that's only the default layout. I'm not familiar enough with Zed, but there's probably a way to change it? In JetBrains IDEs, you can configure panels to sit at the top left/bottom left/left bottom/right bottom/bottom right/top right side and show/hide them with one click (if only one panel on the respective side is shown, it will take up the full space). So you could have files at the top left and the agent panel at the bottom left. And the code editor is of course still the "centerpiece" in the middle.