Scale Saturn's screens by their GUI scale setting

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/main/java/org/saturnclient/impl/ui/SaturnScreenFabric.java

@@ -86,8 +86,10 @@ public class SaturnScreenFabric extends Screen implements ScreenProvider {
         }
         long elapsed = Duration.between(screen.start, Instant.now()).toMillis();
 
-        mouseX *= 2;
-        mouseY *= 2;
+        screen.updateScale();
+
+        mouseX = (int) (mouseX / screen.scale);
+        mouseY = (int) (mouseY / screen.scale);
 
         // From 1.21.6 the background, blur included, is drawn in renderBackground.
         //? if <1.21.6 {
@@ -245,11 +247,11 @@ public class SaturnScreenFabric extends Screen implements ScreenProvider {
 
     @Override
     public int getWidth() {
-        return width * 2;
+        return width;
     }
 
     @Override
     public int getHeight() {
-        return height * 2;
+        return height;
     }
 }