Worked on the JupyterLab repository to deliver an accessibility enhancement for the document search user interface, focusing on improving keyboard focus management for replace controls. Used React and TypeScript to remove unnecessary tabIndex attributes, streamlining DOM structure and reducing friction for keyboard users. Updated Playwright UI test snapshots to accurately reflect these accessibility changes and stabilized automated tests by addressing flaky snapshot behavior. Collaborated with other contributors to ensure thorough review and traceability of the updates. The work contributed to a more accessible and reliable front end, supporting inclusive user experiences and maintainable code in a complex, widely used project.