Renders the Mandelbrot, Julia, Burning Ship and Tricorn sets inside the Worker with escape-time iteration, smooth (continuous) colouring, six palettes with an adjustable colour cycle, optional 2×/3× supersampling and a zoom up to 10¹³ (double precision). The image is encoded as a PNG with the in-house encoder and shown in the preview; the output lists the complex-plane viewport, inside ratio and a share string you can paste back to restore the exact view. A work budget (pixels × iterations × samples ≤ 120 M) keeps every render inside the 5-second limit. Everything runs locally.