phw/peek ? reverse-engineered prompt

Build me a simple Linux screen recorder app that makes short animated GIFs from a selected area of the screen. I want a small, easy to use window that I can place over the part of the screen I want to capture, then hit Record and Stop. It should feel lightweight and focused, not like a full video editor.

The main output should be GIF, with an option to record to WebM too. It should work well for quick demos, bug reports, and showing small UI changes. Keep the interface clean and obvious, with sensible defaults and an easy way to adjust the capture area before recording. If it helps, look up current docs online for the recording and export parts so the app works smoothly on modern Linux desktops, including GNOME and Wayland through XWayland where possible.