fix(auth): preserve MFA continuation through field hydration

packages/auth/components/TwoFactorChallenge.wrn

@@ -13,6 +13,7 @@ component TwoFactorChallenge {
     description = "Choose a verification method and enter the code."
     submitLabel = "Verify"
     recoveryHref = "/recover"
+    signInHref = "/login"
     color = "primary"
     size = "md"
     class = ""
@@ -47,6 +48,7 @@ component TwoFactorChallenge {
         <p data-error="_form" role="alert" class="m-0 hidden rounded-[var(--wrn-radius-sm)] bg-[color-mix(in_srgb,var(--wrn-color-danger)_10%,transparent)] p-3 text-sm text-[var(--wrn-color-danger)]"></p>
         <Button type="submit" label="{submitLabel}" variant="solid" color="{color}" size="{size}" fullWidth="true" />
       </form>
+      <a href='{signInHref}' data-auth-mfa-restart hidden class="mt-4 text-sm text-[var(--wrn-color-primary)] underline">Sign-in verification expired. Back to sign in</a>
       <a href='{recoveryHref}' class="mt-4 inline-flex text-sm text-[var(--wrn-color-primary)] hover:underline">Account recovery options</a>
     </section>
   }