This commit introduces a new AJAX-based feature to display transaction details in the registration management interface. A button labeled "Afficher la transaction" is added, allowing users to toggle the visibility of transaction summaries independently from refunds. The transaction details are fetched dynamically, enhancing user experience by providing immediate access to relevant information. Additionally, corresponding labels for the button are defined in both French and English to support internationalization. The changes improve the overall usability and functionality of the management interface.