Use case: precise-object-edit. Edit target: the supplied new original pixel-art reading-room background. Change ONLY the nearest front-left wheel assembly on the prominent book cart: make it unmistakably a small repair problem, with the same intact black wheel visibly crooked and dangling at an unsafe30-degree lean because its fastening is loose, a clear small gap at the spindle and one tiny round silver washer lying immediately below it on the floor. The cart remains upright on its other three normal sturdy wheels. Preserve EVERYTHING else exactly: room, windows, books, chairs, plants, lighting, framing, pixel-cluster and dither style, palette, texture, no people and no writing. Do not add any tool, hand, human or UI. Preserve panoramic aspect and full scene.
