During June 2025, contributed to the yabukilab/yabuki-b repository by delivering two core front-end features focused on user authentication and profile management. Developed a form-based login page for the Reading Record Exchange App, implementing email and password input handling with CSS and JavaScript to support a streamlined authentication flow. Additionally, overhauled the user profile and My Page UI, introducing an editable username, card-based comments, and work item ratings, all enhanced with improved visual styling. The work emphasized UI/UX design principles and PHP integration, laying a foundation for robust user onboarding and engagement while preparing the product for future enhancements.