Worked on improving document navigation reliability in the Hypertopic/HyperGlosae repository by addressing a specific bug related to missing or invalid document URIs. Developed and integrated a DocumentNotFound component using React and React Router, ensuring users receive clear, user-friendly messaging and appropriate redirection when a document cannot be found. This targeted UI/UX enhancement was implemented in JSX and JavaScript, focusing on reducing user confusion and lowering support overhead. The solution was incorporated directly into the Lectern route, strengthening navigation robustness and addressing issue #115. The work demonstrates attention to user experience and careful integration within an existing frontend codebase.