Fix notification button overflow on tablets and bump version to 2.2.0

- Fix notification button text overflow on tablet devices
- Add tablet-specific media queries for button sizing and layout
- Shorten button text from "Enable Notifications" to "Enable Alerts"
- Add responsive button constraints with min/max width and text overflow handling
- Stack queue action buttons vertically on tablets for better fit
- Bump plugin version from 2.1.0 to 2.2.0 to include all recent enhancements

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

assets/js/browser-phone-frontend.js

@@ -1193,7 +1193,7 @@
                 const $notificationBtn = $('<button>')
                     .attr('id', 'twp-enable-notifications')
                     .addClass('twp-btn twp-btn-info')
-                    .html('🔔 Enable Notifications')
+                    .html('🔔 Enable Alerts')
                     .on('click', requestNotificationPermission);
                 
                 $('#twp-queue-global-actions .global-queue-actions').append($notificationBtn);