Fedora Cinnamon Live 44 chosen as the concrete base (interchangeable with Workstation Live for this purpose), tuxflotte.mode kernel cmdline flag name, 10s countdown with auto as default entry, and the xorriso-based build.sh/extract.sh that no longer needs root. Checks off 'Boot from local disk' in the installer roadmap, now verified end-to-end in QEMU/KVM.