Stop treating login/save-progress as a 48-character email limit.

The overlay was failing Zod on preset method-card support text attached with the draft; raise that cap, allow RFC-length emails, and drop Back to home from the overlay.

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

lib/create/customMethodCardWizardConstants.ts

@@ -2,7 +2,7 @@
 export const CUSTOM_METHOD_CARD_WIZARD_MAX_FIELD_CHARS = 48;
 
 /**
- * Max length for the policy description. Wider than the title so Customize can
- * seed existing card support text without blocking Next.
+ * Max length for persisted method-card `supportText`. Wider than the title so
+ * Customize can seed existing card copy and catalog blurbs without blocking Next.
  */
 export const CUSTOM_METHOD_CARD_WIZARD_MAX_DESCRIPTION_CHARS = 200;