RefreshOS 3.1 builds on RefreshOS 3.0 'Colorful Cosmos', incorporating updated Debian packages, RefreshOS repository integration, improved package management, and system configuration fixes. Debian 13 updates: updated the underlying Debian 13 'Trixie' system from the original Debian 13.4 build to include updates available through Debian 13.7; installed current Debian package updates and removed obsolete packages and older kernel files as part of the release preparation; updated the system to use Linux kernel 6.12.113for the final ISO build. RefreshOS repository and package management: introduced integration with the official RefreshOS APT repository; established the Stable, Testing and Experimental repository channels for distributing and testing RefreshOS-specific packages; added the refreshos-release package to the RefreshOS 3.1 installation, enabling future updates to RefreshOS branding and system configuration through the package manager....