first commit

tests/setup.ts

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+import { expect, afterEach } from 'vitest';
+import { cleanup } from '@testing-library/react';
+import * as matchers from '@testing-library/jest-dom/matchers';
+
+// Extend Vitest's expect with jest-dom matchers
+expect.extend(matchers);
+
+// Cleanup after each test
+afterEach(() => {
+  cleanup();
+});