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>

src/website-deploy/website-deploy.util.ts

@@ -0,0 +1,26 @@
+/** Derive storefront slug from apex host: oaktasty.com → oaktasty, ali-mohammadi.ir → ali-mohammadi */
+export function deploySlugFromHost(host: string): string {
+  const h = host.trim().toLowerCase();
+  const parts = h.split('.').filter(Boolean);
+  const base = parts.length >= 2 ? parts.slice(0, -1).join('-') : parts[0] ?? h;
+  return base
+    .replace(/[^a-z0-9-]+/g, '-')
+    .replace(/-+/g, '-')
+    .replace(/^-|-$/g, '');
+}
+
+const GIT_SSH_RE =
+  /^(?:git@[\w.-]+:[\w./-]+\.git|ssh:\/\/git@[\w.-]+(?::\d+)?\/[\w./-]+\.git)$/i;
+
+export function isValidGitRepoUrl(url: string): boolean {
+  return GIT_SSH_RE.test(url.trim());
+}
+
+/** Turn .../deploy into .../provision (or append /provision if bare). */
+export function provisionUrlFromDeployUrl(deployUrl: string): string {
+  const trimmed = deployUrl.trim().replace(/\/+$/, '');
+  if (/\/deploy$/i.test(trimmed)) {
+    return trimmed.replace(/\/deploy$/i, '/provision');
+  }
+  return `${trimmed}/provision`;
+}