Worked on improving documentation quality for the tisfeng/lobe-chat repository, focusing on enhancing deployment clarity and maintainability. Addressed a documentation bug by correcting a typo in the APP_URL environment variable guidance, ensuring that the instructions accurately reflected the current environment expectations. This change reduced ambiguity for users during deployment and minimized potential misconfigurations, thereby lowering support overhead. The work was carried out using Markdown and emphasized technical writing skills to deliver precise, traceable updates. No new features were developed during this period, as the primary objective was to maintain repository quality through targeted documentation improvements and careful changelog management.