During January 2025, Waitwait0301 focused on improving documentation quality in the toss/frontend-fundamentals repository by addressing a navigation issue affecting Japanese users. Using JavaScript and frontend development skills, they identified and fixed a broken sidebar link in the Japanese documentation, updating it to correctly route users to the /ja/code/community section. This targeted bug fix enhanced accessibility for Japanese-speaking users, streamlining onboarding and reducing potential support requests. The work was delivered through a precise, traceable commit that adhered to localization and documentation standards. While no new features were released, the contribution demonstrated attention to user experience and documentation maintainability.