Give builder fields persistent labels, treat description as optional, and validate save-progress email with a real form.

Name stays required; description is a labelled optional textarea. Email uses native validity and form submit. Drop the dead workshop link and fix a few copy errors.

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

lib/create/isValidCreateFlowSaveEmail.ts

@@ -1,10 +1,31 @@
 /** RFC 5321 max mailbox length (no angle brackets). */
 export const EMAIL_MAX_LEN = 254;
 
-/** Pragmatic check for the create-flow “save progress” email field (draft + footer enablement). */
+/**
+ * Fallback when `HTMLInputElement.checkValidity()` is unavailable (SSR).
+ * Matches the HTML living standard’s type=email pattern closely enough
+ * for the save-progress field; the live input is the source of truth in
+ * the browser.
+ */
+const EMAIL_FALLBACK_PATTERN =
+  /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;
+
+/**
+ * Whether a create-flow save-progress email would pass a required
+ * `type="email"` input’s `checkValidity()`. Does not trim: native
+ * validity rejects leading or trailing spaces.
+ */
 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);
+  if (value.length === 0 || value.length > EMAIL_MAX_LEN) return false;
+  // Native type=email rejects whitespace; jsdom’s checkValidity does not.
+  if (/\s/.test(value)) return false;
+  if (typeof document === "undefined") {
+    return EMAIL_FALLBACK_PATTERN.test(value);
+  }
+  const input = document.createElement("input");
+  input.type = "email";
+  input.required = true;
+  input.value = value;
+  return input.checkValidity();
 }