Uladzislau Yakauleu developed a cohesive UI theming capability for the zed-industries/extensions repository, introducing the Aizen UI Theme with both dark and light variants. Focusing on UI/UX design and front end development, Uladzislau implemented the theme using TOML, emphasizing a warm peach glow and soft purple haze to enhance readability and reduce cognitive load for developers. The work, delivered as a single, well-structured commit co-authored with Finn Evers, aligned with the existing design system and enabled faster UI iteration. This contribution improved the coding environment and facilitated smoother onboarding for new contributors, demonstrating thoughtful design and technical execution.