diff --git a/docker/frontend/shared/utils/skiaImage.ts b/docker/frontend/shared/utils/skiaImage.ts
index 03a69ab..2883e18 100644
--- a/docker/frontend/shared/utils/skiaImage.ts
+++ b/docker/frontend/shared/utils/skiaImage.ts
@@ -56,7 +56,20 @@ export function rotateSkImageBy(image: SkImage | null, degrees: number): SkImage
     canvas.translate(w / 2, h / 2);
     canvas.rotate(degrees, 0, 0);
     canvas.scale(k, k);
-    canvas.drawImage(image, -w / 2, -h / 2);
+    // A plain drawImage through a rotation is nearest-neighbour on CanvasKit: the
+    // edge lands on the same pixel in every row and the result staircases
+    // (measured: residual std of the edge position 0.289 vs 0.048 filtered, see
+    // straighten-sampling-probe.cjs). Only the *Options/*Cubic call shapes take a
+    // sampling option, and `drawImageRectOptions` exists in RN Skia too, so the
+    // shared renderer stays portable.
+    canvas.drawImageRectOptions(
+      image,
+      Skia.XYWHRect(0, 0, w, h),
+      Skia.XYWHRect(-w / 2, -h / 2, w, h),
+      Skia.FilterMode.Linear,
+      Skia.MipmapMode.None,
+      null
+    );
     return surface.makeImageSnapshot() ?? image;
   } finally {
     surface.dispose(); // see rotateSkImage90