During December 2025, work focused on the 1Panel-dev/appstore repository, delivering a new feature that introduced a configurable file upload size limit for Roundcube. This addition allowed administrators to set maximum upload sizes, directly addressing performance and database load issues caused by large file uploads. The technical approach involved backend development and YAML configuration to integrate the new input, as well as database management to ensure stability. A critical Roundcube database issue was also resolved through targeted repair, improving reliability and user experience. The work demonstrated proficiency in YAML, backend integration, and collaborative version control using git within a production environment.