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/server/validation/createFlowSchemas.ts

@@ -1,6 +1,11 @@
 import { z } from "zod";
 import { FLOW_STEP_ORDER } from "../../../app/(app)/create/utils/flowSteps";
 import { customMethodCardFieldBlocksByIdSchema } from "../../../lib/create/customMethodCardFieldBlocks";
+import {
+  CUSTOM_METHOD_CARD_WIZARD_MAX_DESCRIPTION_CHARS,
+  CUSTOM_METHOD_CARD_WIZARD_MAX_FIELD_CHARS,
+} from "../../../lib/create/customMethodCardWizardConstants";
+import { EMAIL_MAX_LEN } from "../../../lib/create/isValidCreateFlowSaveEmail";
 import { MAX_STAKEHOLDER_EMAILS } from "../../../lib/create/stakeholderLimits";
 import { assertPlainJsonValue, DEFAULT_PLAIN_JSON_LIMITS } from "./plainJson";
 
@@ -62,8 +67,8 @@ const conflictManagementDetailEntrySchema = z.object({
 });
 
 const customMethodCardMetaEntrySchema = z.object({
-  label: z.string().max(48),
-  supportText: z.string().max(48),
+  label: z.string().max(CUSTOM_METHOD_CARD_WIZARD_MAX_FIELD_CHARS),
+  supportText: z.string().max(CUSTOM_METHOD_CARD_WIZARD_MAX_DESCRIPTION_CHARS),
 });
 
 /** Normalized (trim + lowercase) stakeholder email for drafts + publish. */
@@ -226,7 +231,7 @@ export const putDraftBodySchema = z.object({
 export type CreateFlowStateValidated = z.infer<typeof createFlowStateSchema>;
 
 export const magicLinkRequestBodySchema = z.object({
-  email: z.string(),
+  email: z.string().max(EMAIL_MAX_LEN),
   next: z.string().optional(),
   draft: createFlowStateSchema.optional(),
 });