Merge cn-region-switch (with omarchy #13690)

# Conflicts:
#	AGENTS.md
#	bin/omarchy-refresh-pacman
#	default/omarchy/omarchy-menu.jsonc
#	install/post-install/pacman.sh
#	shell/plugins/menu/MenuModel.js
#	test/shell.d/menu-test.sh

install/config/all.sh

@@ -1,3 +1,4 @@
+run_logged "$OMARCHY_INSTALL/config/region.sh"
 run_logged "$OMARCHY_INSTALL/config/theme-system.sh"
 run_logged "$OMARCHY_INSTALL/config/browser-policy.sh"
 run_logged "$OMARCHY_INSTALL/config/increase-lockout-limit.sh"

install/config/region.sh

@@ -0,0 +1,44 @@
+cn_links=(
+  "environment.conf /etc/environment.d/90-omarchy-china.conf"
+  "cargo.toml /.cargo/config.toml"
+  "gemrc /etc/gemrc"
+)
+
+# The installer writes the marker from the timezone; omarchy-region passes the region it switches to.
+region=global
+if [[ -e /etc/omarchy/region ]]; then
+  region=$(</etc/omarchy/region)
+fi
+region=${OMARCHY_REGION:-$region}
+
+case $region in
+global)
+  rm -f /etc/omarchy/region
+  for link in "${cn_links[@]}"; do
+    read -r _ target <<<"$link"
+    if [[ -L $target && $(readlink "$target") == */default/regions/cn/* ]]; then
+      rm "$target"
+    fi
+  done
+  ;;
+cn)
+  for link in "${cn_links[@]}"; do
+    read -r _ target <<<"$link"
+    if [[ -e $target && ! -L $target ]]; then
+      echo "Refusing to replace $target, which Omarchy did not create" >&2
+      exit 1
+    fi
+  done
+  mkdir -p /etc/omarchy
+  echo cn >/etc/omarchy/region
+  for link in "${cn_links[@]}"; do
+    read -r source target <<<"$link"
+    mkdir -p "${target%/*}"
+    ln -sfn "$OMARCHY_PATH/default/regions/cn/$source" "$target"
+  done
+  ;;
+*)
+  echo "Unknown region: $region" >&2
+  exit 1
+  ;;
+esac

install/post-install/pacman.sh

@@ -21,8 +21,13 @@ fi
 # rc on aarch64) gets the platform's default channel instead.
 channel=${OMARCHY_MIRROR:-}
 [[ -n $channel && -f $templates/pacman-$channel.conf ]] || channel=$(omarchy_pacman_default_channel "$platform")
-cp -f "$templates/pacman-$channel.conf" /etc/pacman.conf
-cp -f "$templates/mirrorlist-$channel" /etc/pacman.d/mirrorlist
+# Regions render x86 pacman only (omarchy #13690).
+if [[ $platform == x86 ]]; then
+  "$OMARCHY_PATH/bin/omarchy-apply-pacman" "$channel"
+else
+  cp -f "$templates/pacman-$channel.conf" /etc/pacman.conf
+  cp -f "$templates/mirrorlist-$channel" /etc/pacman.d/mirrorlist
+fi
 
 # An image build leaves the keyring to each machine's first boot, so no two
 # share a master key (install/helpers/image-target.sh).