The fork's colour/wallpaper/kvantum scripts still hard-code QUICKSHELL_CONFIG_NAME="ii", so they read and write ~/.config/quickshell/ii instead of end4-pC - rewrite them to end4-pC at build time (verified against the current fork HEAD: 5 scripts match the anchored pattern, re-runs are no-ops). Also replace the fork's assets/images/default_wallpaper.png - fed to switchwall.sh by FirstRunExperience.qml on first login - with the wallpaper now shipped in skel's ~/Pictures/Wallpapers, so the first login lands on the japan-street wallpaper instead of the fork's default.