Fix screenshot offset after pixel-exact crop change

The new CGImage.cropping path expects a top-left pixel rect; the previous
CGContext redraw had implicitly flipped Y. Keep the existing SCDisplay-space
conversion so the crop matches the selected region.

💘 Generated with Crush

Assisted-by: Crush:deepseek-v4-flash-0731

Sources/Kapture/CaptureController.swift

@@ -124,6 +124,9 @@ final class ScreenCapture {
         let scaleX = CGFloat(image.width) / display.frame.width
         let scaleY = CGFloat(image.height) / display.frame.height
         guard scaleX > 0, scaleY > 0 else { return nil }
+        // pxRect is in image pixel space with a TOP-LEFT origin (SCDisplay space).
+        // CGImage.cropping(to:) expects the same top-left rect, so no Y flip
+        // is needed here — this preserves the previous CGContext behavior.
         let pxRect = CGRect(
             x: (cgRect.minX - display.frame.minX) * scaleX,
             y: (cgRect.minY - display.frame.minY) * scaleY,