In June 2025, Tamara Kovtun focused on enhancing the Calculator module for the ZeroWaste repository, prioritizing dependency stability and user interface improvements. She implemented Tailwind CSS enhancements to refine the appearance of reusable item buttons, introducing a success background and a matte lime hover effect for better user experience. Using JavaScript, Ruby, and SCSS, Tamara also locked platform-specific dependencies in the Gemfile to ensure consistent builds across environments. Additionally, she introduced a scalable maxWidth configuration for Tailwind CSS, supporting future responsive design needs. Her work emphasized maintainability and scalability, though it did not involve direct bug fixes this period.