Yassine Safraoui worked on enhancing the user interface of the lichess-org/lila repository by focusing on the visual prominence of carousel control buttons. Using CSS and SCSS within a front-end development context, Yassine increased the font size of these controls to improve usability and design consistency, without introducing new functionality or altering existing behavior. The work addressed a specific aspect of UI polish, aiming to make navigation elements more accessible and visually clear for users. Over the course of the month, Yassine concentrated on this targeted feature, with no major bug fixes, reflecting a focused and incremental approach to front-end improvement.