Create a system that functions on smart TVs and connects to https://mercure.rocks/ to display a list of people to be attended to, play a sound when it's someone's turn, and show the assigned box number.

Platform: The application should be developed for smart TVs, compatible with major brands and models. Integration with Mercure: Utilize the Mercure protocol ([login to view URL]) for real-time updates and communication. Implement secure HTTPS connections for data transmission. User Interface: Display a clear and user-friendly interface on the smart TV screen. The main screen should show the list of people in the queue, including their names or identifiers. Queue Management: Fetch and update the queue information from the Mercure server in real-time. Highlight the person currently being served or about to be served. Notification Sound: Play a distinct notification sound when it's a person's turn to be attended. Allow for customization of the notification sound. Box Assignment: Display the assigned box number for the person currently being served. Ensure that the box number is clearly visible on the screen. User Interaction: Include settings to input Mercure server details (endpoint, API key, etc.). Error Handling: Implement error handling for scenarios like network issues or Mercure server unavailability. Display relevant error messages on the screen. Security: Implement secure coding practices to protect user data. Ensure that sensitive information, such as Mercure server credentials, is securely stored. Deliverables: Source code of the Smart TV application. Documentation on how to set up and configure the application. Any necessary dependencies or libraries used. Testing: Include test cases to ensure the proper functioning of the application under various scenarios.