fix(setup): port KEYMAPS+vconsole support to auto-installer and answerfile generator

arch-autoinstall.sh was missing the keymap handling added to the guided
installer in the previous two commits, so booting the ISO in auto mode
(answerfile embedded) never called loadkeys and left the installed system
with no /etc/vconsole.conf.

- Add the same KEYMAPS array + selection logic to arch-autoinstall.sh
  (AF mode reads .keymap, interactive mode prompts)
- Call loadkeys and export KEYMAP into the chroot
- Write /etc/vconsole.conf inside the chroot
- Add keymap dialog to generate-answerfile.sh so the field is populated
- Document .keymap in the arch-autoinstall.sh answerfile field list

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

setup/arch-autoinstall.sh

@@ -4,7 +4,7 @@
 # If /answerfile.json exists (e.g. embedded in the ISO via build.sh --preconf),
 # all prompts are answered from it. Missing fields fall back to interactive prompts.
 #
-# Answerfile fields: drive, kernel, hostname, username, encrypt, fido2_root,
+# Answerfile fields: drive, kernel, keymap, hostname, username, encrypt, fido2_root,
 #                    fido2_user, run_tui  (password always prompted interactively)
 
 set -euo pipefail
@@ -55,6 +55,35 @@ if $AF_MODE; then
     command -v jq &>/dev/null || pacman -Sy --noconfirm jq
 fi
 
+############################################
+# KEYMAP
+# To add more layouts: append "code|Display Name" to KEYMAPS
+############################################
+KEYMAPS=(
+    "us|English US"
+    "de|German"
+)
+
+if $AF_MODE; then
+    LIVE_KEYMAP=$(af_get '.keymap' 'us')
+else
+    echo "Select keyboard layout:"
+    for i in "${!KEYMAPS[@]}"; do
+        _km_code="${KEYMAPS[$i]%%|*}"
+        _km_name="${KEYMAPS[$i]##*|}"
+        printf "  %d) %-14s (%s)\n" $((i+1)) "$_km_name" "$_km_code"
+    done
+    read -rp "Choice [1]: " _KM_IDX
+    _KM_IDX=$(( ${_KM_IDX:-1} - 1 ))
+    if (( _KM_IDX >= 0 && _KM_IDX < ${#KEYMAPS[@]} )); then
+        LIVE_KEYMAP="${KEYMAPS[$_KM_IDX]%%|*}"
+    else
+        LIVE_KEYMAP="${KEYMAPS[0]%%|*}"
+    fi
+fi
+loadkeys "$LIVE_KEYMAP"
+KEYMAP="$LIVE_KEYMAP"
+
 ############################################
 # SAFETY WARNING
 ############################################
@@ -263,7 +292,7 @@ fi
 ############################################
 # PASS VARIABLES INTO CHROOT
 ############################################
-export HOSTNAME USERNAME USERPASS ROOT_PART KERNEL FIDO_ROOT FIDO_USER ENCRYPT_DISK
+export HOSTNAME USERNAME USERPASS ROOT_PART KERNEL FIDO_ROOT FIDO_USER ENCRYPT_DISK KEYMAP
 
 ############################################
 # CHROOT CONFIGURATION
@@ -275,6 +304,7 @@ set -euo pipefail
 echo "en_US.UTF-8 UTF-8" > /etc/locale.gen
 locale-gen
 echo "LANG=en_US.UTF-8" > /etc/locale.conf
+echo "KEYMAP=${KEYMAP}" > /etc/vconsole.conf
 
 # Time / hostname
 ln -sf /usr/share/zoneinfo/Europe/Vienna /etc/localtime

setup/generate-answerfile.sh

@@ -118,6 +118,14 @@ AF_KERNEL=$(dialog --backtitle "$BACKTITLE" \
     "linux-zen" "Zen performance kernel" \
     3>&1 1>&2 2>&3) || AF_KERNEL="linux"
 
+# ── Keymap ────────────────────────────────────────────────────────────────────
+AF_KEYMAP=$(dialog --backtitle "$BACKTITLE" \
+    --title " Keyboard Layout " \
+    --menu "Select keyboard layout (live environment + installed system):" 10 60 2 \
+    "us" "English US" \
+    "de" "German" \
+    3>&1 1>&2 2>&3) || AF_KEYMAP="us"
+
 # ── Hostname ──────────────────────────────────────────────────────────────────
 AF_HOSTNAME=$(dialog --backtitle "$BACKTITLE" \
     --title " Hostname " \
@@ -315,6 +323,7 @@ fi
 SUMMARY=""
 [[ -n "$AF_DRIVE"    ]] && SUMMARY+="  Drive:      $AF_DRIVE\n"
 [[ -n "$AF_KERNEL"   ]] && SUMMARY+="  Kernel:     $AF_KERNEL\n"
+[[ -n "$AF_KEYMAP"   ]] && SUMMARY+="  Keymap:     $AF_KEYMAP\n"
 [[ -n "$AF_HOSTNAME" ]] && SUMMARY+="  Hostname:   $AF_HOSTNAME (+ MAC suffix at deploy)\n"
 [[ -n "$AF_USERNAME" ]] && SUMMARY+="  Username:   $AF_USERNAME\n"
 SUMMARY+="  Encrypt:    $AF_ENCRYPT\n"
@@ -349,6 +358,7 @@ mkdir -p "$(dirname "$OUTPUT")"
     printf '  "_generated": "%s",\n' "$(date -Iseconds)"
     printf '  "drive": %s,\n'        "$(json_str "$AF_DRIVE")"
     printf '  "kernel": %s,\n'       "$(json_str "$AF_KERNEL")"
+    printf '  "keymap": %s,\n'       "$(json_str "$AF_KEYMAP")"
     printf '  "hostname": %s,\n'     "$(json_str "$AF_HOSTNAME")"
     printf '  "username": %s,\n'     "$(json_str "$AF_USERNAME")"
     printf '  "encrypt": %s,\n'      "$AF_ENCRYPT"