Worked on the protyagov/martspec repository over two months, focusing on front-end enhancements and user experience improvements. Developed a unified, flexbox-based centered page layout and introduced a reusable PageWrapper decorator to ensure consistent presentation across both application pages and Storybook components. Delivered a dynamic main page Reviews feature that selects and displays localized review content, improving engagement and layout responsiveness. Addressed a critical bug by implementing robust bounds checking for appId selection, which stabilized content rendering and reduced runtime errors. Utilized React, JavaScript, and CSS throughout, maintaining clear commit traceability and prioritizing maintainability and reliability in all changes.