Add Sticky “Book Now” Button to Product Pages

Feature: Add a sticky “Book Now” button that remains visible as users scroll down the product page — similar to the default Shopify “sticky add to cart” functionality.

Purpose:

• Improve visibility and accessibility of the booking call-to-action
• Encourage conversions, especially on mobile devices
• Provide a better user experience by reducing the need to scroll back up

Preferred Behaviour:

• Button should appear once the user scrolls past the top section
• It should link directly to the booking app widget (Appointo) or scroll to the booking section**
• Clean and non-intrusive design, aligned with our current theme