feat(admin): scaffold Vite+React admin workspace

apps/admin/src/App.test.tsx

@@ -0,0 +1,20 @@
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it } from 'vitest';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import App from './App';
+
+function renderApp() {
+  const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } });
+  return render(
+    <QueryClientProvider client={queryClient}>
+      <App />
+    </QueryClientProvider>
+  );
+}
+
+describe('App', () => {
+  it('renders the admin app name', () => {
+    renderApp();
+    expect(screen.getByText('SoleLog Admin')).toBeInTheDocument();
+  });
+});