Worked on the ssu-student-union/homepage-frontend repository to enhance front-end reliability by addressing type safety issues in localStorage handling. Focused on improving maintainability and data consistency, the developer replaced the use of 'any' with a concrete TypeScript type and refactored the categoryName property to category across multiple components and React hooks. This approach reduced potential runtime errors and streamlined data flow throughout the application. Utilizing JavaScript, TypeScript, and React Hooks, the changes improved overall code quality and enabled safer future refactoring. The work centered on bug fixing rather than feature development, emphasizing robust type safety and maintainable frontend architecture.