fix: reboot/shutdown commands work without sudo prefix

polkit denies reboot/shutdown for non-root users without a local seat
(e.g. SSH sessions). Since archipelago has NOPASSWD sudo, add shell
aliases so reboot/shutdown/halt/poweroff transparently use sudo.

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

image-recipe/build-auto-installer-iso.sh

@@ -2236,6 +2236,15 @@ rm -f /mnt/target/etc/motd.d/* 2>/dev/null || true
 if ! grep -q '/sbin' /mnt/target/home/archipelago/.bashrc 2>/dev/null; then
     echo 'export PATH="$PATH:/sbin:/usr/sbin"' >> /mnt/target/home/archipelago/.bashrc
 fi
+# Power commands need sudo on SSH sessions (polkit denies without local seat)
+if ! grep -q 'alias reboot' /mnt/target/home/archipelago/.bashrc 2>/dev/null; then
+    cat >> /mnt/target/home/archipelago/.bashrc <<'ALIASES'
+alias reboot='sudo systemctl reboot'
+alias shutdown='sudo shutdown'
+alias halt='sudo systemctl halt'
+alias poweroff='sudo systemctl poweroff'
+ALIASES
+fi
 
 # Systemd service: use the production version from rootfs (configs/archipelago.service)
 # Do NOT overwrite — the rootfs already has the correct User=archipelago, no DEV_MODE version