Qinrui Zhou contributed to the ucsb-cs156/proj-courses repository by delivering targeted improvements to both user interface and data visualization features. Zhou overhauled the Personal Schedules Details Page, integrating a new weekly schedule component and updating related tests to enhance usability. In addition, Zhou refactored the Grade History Graph, improving data encapsulation and tooltip formatting for clearer insights. Addressing reliability, Zhou resolved a case-insensitive text-matching issue in the CourseOverTimeSearchForm tests. The work included migrating the codebase to the React 18 root API, reintroducing ESLint rules, and refining UI components, leveraging JavaScript, React, and front end testing best practices.