Fix captures on displays below the main screen

ScreenCaptureKit uses a flipped Y axis relative to AppKit NSScreen frames,
so selections on a display below the main screen produced out-of-bounds
crop rects and "Capture failed". Convert the selection into SCDisplay space
using the matching NSScreen's top edge before cropping.

💘 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>1.1.6</string>
+    <string>1.1.7</string>
     <key>CFBundleVersion</key>
-    <string>16</string>
+    <string>17</string>
     <key>LSUIElement</key>
     <true/>
     <key>NSHighResolutionCapable</key>