Create Community stage implemented

lib/create/isValidCreateFlowSaveEmail.ts

@@ -0,0 +1,9 @@
+const EMAIL_MAX_LEN = 254;
+
+/** Pragmatic check for the create-flow “save progress” email field (draft + footer enablement). */
+export function isValidCreateFlowSaveEmail(value: unknown): boolean {
+  if (typeof value !== "string") return false;
+  const t = value.trim();
+  if (t.length === 0 || t.length > EMAIL_MAX_LEN) return false;
+  return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(t);
+}