Fix two bugs in the anaconda post-installation script:
1. Hostname handling: Anaconda writes an empty /etc/hostname to the target system. Now we preserve the hostname set during installation from the live environment, falling back to 'fws' if using default values.
2. Keyboard mapping: Anaconda derives keyboard layout from language only, ignoring territory. For locales with territory variants (e.g., fr_CH for Switzerland), we now apply territory-specific keyboard maps to both console (vconsole.conf) and X11 (xorg.conf.d) using langtable for proper mapping.
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