Harden server draft sync (Save & Exit + post-login transfer)

tests/components/Login.test.tsx

@@ -1,4 +1,3 @@
-import React from "react";
 import { describe, it, expect, vi, beforeEach } from "vitest";
 import { screen, fireEvent, waitFor } from "@testing-library/react";
 import "@testing-library/jest-dom/vitest";