Add Copy Diagnostics menu item for multi-display debugging

Prints each NSScreen's frame/backing scale/CG display ID and each
SCDisplay's frame/point size, and copies it to the clipboard, so
secondary-display capture failures can be debugged from the menu bar.

💘 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>1.1.5</string>
+    <string>1.1.6</string>
     <key>CFBundleVersion</key>
-    <string>15</string>
+    <string>16</string>
     <key>LSUIElement</key>
     <true/>
     <key>NSHighResolutionCapable</key>