Fix secondary display captures after retina scaling change

The 1.1.2 retina fix overrode the stream width from the display's pixel
dimensions, which made captures on secondary monitors come out at the
wrong scale or offset. Restore requesting the display's native pixel
resolution and keep the crop scale derived from the actual returned image,
plus guard against out-of-bounds crop rects.

💘 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>1.1.3</string>
+    <string>1.1.4</string>
     <key>CFBundleVersion</key>
-    <string>13</string>
+    <string>14</string>
     <key>LSUIElement</key>
     <true/>
     <key>NSHighResolutionCapable</key>