I've been using AI to write more code, which has also meant writing more tests—including screenshot tests to catch unexpected UI changes. That leaves me reviewing two things: the code in GitHub and the visual diff in a Playwright report. I kept switching between them to answer a small question: did that button move, or did its padding change by a couple of pixels? GitHub's side-by-side, swipe, and opacity views help compare images. What I wanted was explicit pixel highlighting, especially ...