Add FolderTrustDialog that shows on launch and enables folderTrust setting (#5815)

packages/cli/src/ui/components/FolderTrustDialog.test.tsx

@@ -0,0 +1,29 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { render } from 'ink-testing-library';
+import { vi } from 'vitest';
+import { FolderTrustDialog, FolderTrustChoice } from './FolderTrustDialog.js';
+
+describe('FolderTrustDialog', () => {
+  it('should render the dialog with title and description', () => {
+    const { lastFrame } = render(<FolderTrustDialog onSelect={vi.fn()} />);
+
+    expect(lastFrame()).toContain('Do you trust this folder?');
+    expect(lastFrame()).toContain(
+      'Trusting a folder allows Gemini to execute commands it suggests.',
+    );
+  });
+
+  it('should call onSelect with DO_NOT_TRUST when escape is pressed', () => {
+    const onSelect = vi.fn();
+    const { stdin } = render(<FolderTrustDialog onSelect={onSelect} />);
+
+    stdin.write('\u001B'); // Simulate escape key
+
+    expect(onSelect).toHaveBeenCalledWith(FolderTrustChoice.DO_NOT_TRUST);
+  });
+});