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>

app/components/modals/Login/LoginForm.tsx

@@ -9,6 +9,7 @@ import TextInput from "../../controls/TextInput";
 import ContentLockup from "../../type/ContentLockup";
 import Alert from "../Alert";
 import { requestMagicLink } from "../../../../lib/create/api";
+import { EMAIL_MAX_LEN } from "../../../../lib/create/isValidCreateFlowSaveEmail";
 import { buildCreateFlowDraftPayload } from "../../../../lib/create/buildCreateFlowDraftPayload";
 import { safeInternalPath } from "../../../../lib/safeInternalPath";
 import {
@@ -232,6 +233,7 @@ export default function LoginForm({
             disabled={submitting}
             error={Boolean(emailError)}
             showHelpIcon
+            maxLength={EMAIL_MAX_LEN}
           />
           {emailError ? (
             <p