Modernize the result window UI

Restyles the window with a cleaner layout: icon-based toolbar buttons
(Copy/Save/Get All Text, highlighted OCR Selection action), a bottom status
bar with progress indicator and contextual hints, monospaced text tab, and
a divider separating chrome from content.

💘 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>1.2.0</string>
+    <string>1.2.1</string>
     <key>CFBundleVersion</key>
-    <string>20</string>
+    <string>21</string>
     <key>LSUIElement</key>
     <true/>
     <key>NSHighResolutionCapable</key>