Enable storefront provision from Add Domain via optional git URL.

Persist deploy_slug on domains, call the websites agent /provision endpoint, and drop the hard-coded host map so Deploy appears from the UI.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/websites-agent/deploy.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SLUG="${1:-}"
+if [[ -z "$SLUG" ]]; then
+  echo "usage: deploy.sh <slug>" >&2
+  exit 1
+fi
+
+ROOT="/var/www/sites/$SLUG"
+LOG="/var/log/websites/deploy-$SLUG.log"
+exec >>"$LOG" 2>&1
+
+echo "==== $(date -u +%Y-%m-%dT%H:%M:%SZ) deploy start: $SLUG ===="
+
+if [[ ! -d "$ROOT/.git" ]]; then
+  echo "missing site: $ROOT"
+  exit 1
+fi
+
+cd "$ROOT"
+git fetch origin
+git reset --hard origin/main
+npm ci
+npm run build
+pm2 restart "$SLUG" --update-env || pm2 start /var/www/sites/ecosystem.config.cjs --only "$SLUG"
+echo "==== $(date -u +%Y-%m-%dT%H:%M:%SZ) deploy ok: $SLUG ===="