Render x86 pacman through #13690 on refresh, and on install only with a region

Integration only, until omarchy #13690 rebases onto the ARM pacman
templates. pacman-templates-test still expects x86 refresh to copy
the templates directly.

bin/omarchy-refresh-pacman

@@ -42,31 +42,29 @@ if [[ ! -f $templates/pacman-$channel.conf || ! -f $templates/mirrorlist-$channe
   exit 1
 fi
 
-# Render the channel templates plus this machine's regional additions as the
-# caller, so root only copies finished files. The scratch directory goes on
-# every exit, including a failed render, a refused sudo prompt, or a signal;
-# revoking the sudo timestamp stays the last thing the exit path does.
-rendered=$(mktemp -d)
-cleanup_refresh() {
-  local status=$?
-  rm -rf "$rendered"
-  omarchy_security_exit_with_revoked_sudo "$status"
-}
-trap cleanup_refresh EXIT
-# Regions render x86 pacman only (omarchy #13690); other platforms copy their templates.
+conf=$templates/pacman-$channel.conf mirrorlist=$templates/mirrorlist-$channel
+# Regions render x86 pacman only (omarchy #13690).
 if [[ $platform == x86 ]]; then
+  # Render the channel templates plus this machine's regional additions as the
+  # caller, so root only copies finished files. The scratch directory goes on
+  # every exit, including a failed render, a refused sudo prompt, or a signal;
+  # revoking the sudo timestamp stays the last thing the exit path does.
+  rendered=$(mktemp -d)
+  cleanup_refresh() {
+    local status=$?
+    rm -rf "$rendered"
+    omarchy_security_exit_with_revoked_sudo "$status"
+  }
+  trap cleanup_refresh EXIT
   "$OMARCHY_PATH/bin/omarchy-apply-pacman" --render "$channel" "$rendered"
-else
-  cp "$templates/pacman-$channel.conf" "$rendered/pacman.conf"
-  cp "$templates/mirrorlist-$channel" "$rendered/mirrorlist"
+  conf=$rendered/pacman.conf mirrorlist=$rendered/mirrorlist
 fi
 
 sudo cp -f /etc/pacman.conf /etc/pacman.conf.bak
 sudo cp -f /etc/pacman.d/mirrorlist /etc/pacman.d/mirrorlist.bak
 echo "Setting channel to $channel"
-sudo cp -f "$rendered/pacman.conf" /etc/pacman.conf
-sudo cp -f "$rendered/mirrorlist" /etc/pacman.d/mirrorlist
-rm -rf "$rendered"
+sudo cp -f "$conf" /etc/pacman.conf
+sudo cp -f "$mirrorlist" /etc/pacman.d/mirrorlist
 
 # Allow user customization of /etc/pacman.conf before the upgrade runs, so
 # custom repositories and IgnorePkg entries shape the downgrade-capable