mkarchiso validation: bios.syslinux.mbr/eltorito and uefi-x64.* bootmodes are deprecated -> use bios.syslinux + uefi.systemd-boot. syslinux must be in the package list for the BIOS bootmode; add memtest86+/edk2-shell too.
Implements all four components from the BOS spec: - dotfiles/: default Hyprland, bread, breadbox, breadcrumbs configs - iso/: archiso profiledef, package list, Calamares YAML modules, post-install.sh - bos-settings/: Cargo workspace with GTK4 settings app (8 views: snapshots, packages, bread, breadbar, breadbox, breadcrumbs, breadpad, hyprland) https://claude.ai/code/session_01WszGHvCmxgcyTwNSkfLF9P
