Worked on the ModelEngine-Group/nexent repository to deliver core user experience enhancements and address critical bugs in the Knowledge Base management and Model Configuration interfaces. Focused on responsive design and inline validation using React, TypeScript, and Ant Design, the updates improved usability across devices and reduced user errors during knowledge base creation. Refactored UI components to streamline workflows, including removing redundant sections and implementing flexible layouts with CSS Flexbox and Tailwind CSS. Addressed issues such as agent version dropdown initialization and document chunk scrolling, while also synchronizing language support for skill creation, resulting in more stable workflows and accelerated onboarding for developers.