Ask for the region on the first screen and hand it to target setup

configs/airootfs/usr/share/omarchy-iso/orchestrator/context.py

@@ -65,6 +65,12 @@ class InstallContext:
         defer_provisioning = bool(omarchy_install.get("defer_provisioning")) or defer_provisioning_marker is not None
         omarchy_install["defer_provisioning"] = defer_provisioning
 
+        # Autoinstall configs written before regions existed install Global.
+        region = omarchy_install.get("region", "global")
+        if region not in ("global", "china"):
+            raise RuntimeError(f"omarchy_install.region must be global or china, not {region!r}")
+        omarchy_install["region"] = region
+
         if creds_path.exists():
             user_credentials = json.loads(creds_path.read_text())
         elif defer_provisioning:

configs/airootfs/usr/share/omarchy-iso/orchestrator/phases_impl.py

@@ -1098,6 +1098,7 @@ def _run_target_setup_command(ctx: InstallContext, cmd: list[str], *, user: str
         f"OMARCHY_USER_NAME={ctx.full_name}",
         f"OMARCHY_USER_EMAIL={ctx.email}",
         f"OMARCHY_MIRROR={mirror_channel}",
+        f"OMARCHY_REGION={ctx.omarchy_install['region']}",
         f"OMARCHY_ISO_REF={_iso_ref()}",
         f"OMARCHY_RUNTIME_PACKAGE={_omarchy_runtime_package()}",
         f"OMARCHY_SETTINGS_PACKAGE={_omarchy_settings_package()}",