fix: ensure app gains focus when restoring main window (#6984)

Add app.focus({ steal: true }) before restoring the window to ensure
the application properly gains focus when activated.

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

packages/bruno-electron/src/index.js

@@ -93,6 +93,7 @@ let appProtocolUrl;
 // Helper function to focus and restore the main window
 const focusMainWindow = () => {
   if (mainWindow) {
+    app.focus({ steal: true });
     if (mainWindow.isMinimized()) {
       mainWindow.restore();
     }