Fix vertical offset in ScreenCaptureKit crops

The captured CGImage has a top-left origin, while the crop rect was
computed in SCDisplay space (bottom-left). Flip Y within the display's
bounds when converting to pixel coordinates so the crop lands exactly
where the user selected.

💘 Generated with Crush

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

build-app.sh

@@ -108,9 +108,9 @@ cat > "$APP/Contents/Info.plist" <<'PLIST'
     <key>CFBundleIconFile</key>
     <string>Icon</string>
     <key>CFBundleShortVersionString</key>
-    <string>1.3.1</string>
+    <string>1.3.2</string>
     <key>CFBundleVersion</key>
-    <string>31</string>
+    <string>32</string>
     <key>LSUIElement</key>
     <true/>
     <key>NSHighResolutionCapable</key>