During April 2026, Terminal Chai addressed a UI consistency issue in the plotly/dash repository by fixing the misalignment of dcc.Slider marks when labels are empty strings. They applied a targeted CSS height adjustment to ensure that empty and labeled marks render at equal heights, directly improving the user interface’s reliability. To prevent future regressions, Terminal Chai implemented automated tests verifying consistent mark heights and updated the project documentation and changelog to reflect these changes. This work demonstrated practical application of front end development, UI design, and testing skills, with a focused Python and CSS-based solution that enhanced user experience.