Make the first screen a language choice; Chinese gets the CJK console and zh_CN

The CJK console unpacks Noto Sans Mono CJK from the offline mirror instead
of shipping fonts in the live image, lists only US-keymap keyboards and
preselects Pinyin. The target's LANG comes through locale_config.

builder/build-iso.sh

@@ -124,8 +124,8 @@ cp "/tmp/$NODE_FILENAME" "$build_cache_dir/airootfs/opt/packages/"
 # The selected omarchy-settings package is needed here so its post_install hook
 # drops Omarchy's plymouthd.conf into /etc/plymouth before mkarchiso builds the
 # live initramfs.
-# cage, foot and the two fonts give China installs a console that draws Chinese.
-arch_packages=(linux-t2 git gum jq openssl plymouth ttfx tzupdate omarchy-keyring "$OMARCHY_SETTINGS_PACKAGE" lvm2 cryptsetup parted cage foot ttf-jetbrains-mono wqy-microhei)
+# cage and foot give Chinese installs a console that draws Chinese.
+arch_packages=(linux-t2 git gum jq openssl plymouth ttfx tzupdate omarchy-keyring "$OMARCHY_SETTINGS_PACKAGE" lvm2 cryptsetup parted cage foot)
 printf '%s\n' "${arch_packages[@]}" >> "$build_cache_dir/packages.x86_64"
 
 # The live ISO boots linux-t2 (see airootfs/etc/mkinitcpio.d/linux-t2.preset), so