- Fix XFCE display manager: replace lightdm-gtk-greeter with sddm for consistency
- Add SDDM numlock initialization for KDE, XFCE, and Hyprland
- Configure X11 keyboard layout from kickstart or locale via langtable to ensure correct SDDM login keyboard
- Enable wheel group sudo access and add all human users to wheel group
- Apply FWS branding to os-release, lsb-release, and GRUB configuration
- Remove inappropriate live system motd file
- Fix DNS resolution: configure systemd-resolved stub resolver with NetworkManager integration to prevent "Limited Connectivity" on first boot
- Reformat case statement for better readability
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