Answer the region screen in the ISO acceptance harness

bin/omarchy-iso-test

@@ -14,6 +14,7 @@
 # Usage: omarchy-iso-test [release/omarchy.iso] [options]
 #
 #   --encrypt          Drive the encrypted install flow (default: unencrypted)
+#   --region REGION    Pick global (default) or china on the first screen
 #   --provision              Drive the deferred-provisioning install flow: no user during install, the
 #                      first boot runs omarchy-provision-owner and creates it there
 #   --reuse-base       Skip the install phase if a base image already exists
@@ -39,6 +40,7 @@ MEMORY=8192
 INSTALL_TIMEOUT=2400
 BOOT_TIMEOUT=600
 ENCRYPT=false
+REGION=global
 PROVISION=false
 REUSE_BASE=false
 INSTALL_ONLY=false
@@ -54,6 +56,7 @@ GUEST_HOSTNAME="omarchy-test"
 while (($#)); do
   case "$1" in
     --encrypt) ENCRYPT=true ;;
+    --region) REGION="$2"; shift ;;
     --provision) PROVISION=true ;;
     --reuse-base) REUSE_BASE=true ;;
     --install-only) INSTALL_ONLY=true ;;
@@ -84,6 +87,11 @@ if [[ ! -f ${ISO:-} ]]; then
   exit 1
 fi
 
+if [[ $REGION != "global" && $REGION != "china" ]]; then
+  echo "--region must be global or china, not $REGION" >&2
+  exit 1
+fi
+
 omarchy-pkg-add qemu-full edk2-ovmf socat imagemagick tesseract tesseract-data-eng
 
 OVMF_CODE="/usr/share/edk2/x64/OVMF_CODE.4m.fd"
@@ -91,6 +99,7 @@ OVMF_VARS_TEMPLATE="/usr/share/edk2/x64/OVMF_VARS.4m.fd"
 
 BASE_NAME="$(basename "$ISO" .iso)"
 $ENCRYPT && BASE_NAME+="-encrypted"
+[[ $REGION == "china" ]] && BASE_NAME+="-china"
 $PROVISION && BASE_NAME+="-provision"
 BASE_DIR="$REPO_DIR/test-runs/$BASE_NAME"
 RUN_DIR="$BASE_DIR/runs/$(date +%Y%m%d-%H%M%S)"
@@ -618,7 +627,13 @@ drive_configurator() {
   capture_console "success-installer-00-greeter"
   press ret
 
-  # Keyboard is the first screen. Ctrl+C there is the hidden entry into deferred provisioning
+  # Region comes first, Global preselected and China one row below.
+  wait_for_screen "Select region" 300
+  capture_console "success-installer-01-region"
+  [[ $REGION == "china" ]] && press down
+  press ret
+
+  # Keyboard follows. Ctrl+C there is the hidden entry into deferred provisioning
   # mode; a normal install just selects the layout.
   wait_for_screen "keyboard layout" 300
   capture_console "success-installer-01-keyboard-layout"