Worked on modernizing the frontend user interface for the 3liz/lizmap-web-client repository by updating the Progress Bar component to align with Bootstrap 5 styling. Focused on enhancing visual consistency and user experience, the work involved refactoring both map_edition.tpl and dataviz.js to utilize the latest Bootstrap 5 progress bar classes. This update consolidated progress bar styling into a single, maintainable UI component, simplifying future updates and theme changes. The implementation relied on strong skills in Bootstrap, HTML, and JavaScript, and was delivered through a collaborative pull request process, reflecting a methodical approach to scalable frontend development and UI standardization.