Worked on the hanxi/xiaomusic repository to deliver the SoundSpace Theme, ensuring consistent theming and user experience across both desktop and mobile platforms. Focused on mobile compatibility by refactoring build processes and animations, which improved cross-device branding and maintainability. Utilized CSS, HTML, and JavaScript to implement these changes, while introducing Vite-based path aliases and base URL configuration to streamline development and enhance build performance. Addressed and resolved a bug affecting the SoundSpace random play mode, restoring reliable playback and stability. The work enabled faster feature delivery, improved mobile user experience, and reduced runtime issues through thoughtful front end and mobile development.