💄 Update button text across multiple pages

Change button labels to enhance clarity and user engagement. :lipstick: Update background styles for comparison pages Refactor background gradient styles for improved visual consistency across the comparison and scheduling pages. :lipstick: Update user avatar display method Replace img tag with image_tag helper for better integration with Rails. :arrow_up: Upgrade Ruby setup and dependencies Update Ruby setup actions to version 1.279.0 and upgrade sqlite3, action_text-trix, httparty, nokogiri, public_suffix, and rubocop-ast to their latest versions for improved performance and security.