During November 2025, Thushii developed a date-driven Advent Lights Header UI for the hc-backend repository, enhancing the navigation bar with dynamic candle displays that respond to the Advent calendar. Using HTML and JavaScript, Thushii implemented responsive styling to ensure the feature adapts seamlessly across devices while maintaining accessibility standards. The work included refining the candle rendering logic for visual stability and verifying that Advent Sundays initialization remained accurate, supporting a correct seasonal display. By focusing on a single feature branch, Thushii maintained code quality and minimized risk, demonstrating solid front end development skills and attention to user experience and maintainability.