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

packages/cli/src/ui/hooks/useFolderTrust.ts

@@ -0,0 +1,31 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { useState, useCallback } from 'react';
+import { LoadedSettings, SettingScope } from '../../config/settings.js';
+import { FolderTrustChoice } from '../components/FolderTrustDialog.js';
+
+export const useFolderTrust = (settings: LoadedSettings) => {
+  const [isFolderTrustDialogOpen, setIsFolderTrustDialogOpen] = useState(
+    !!settings.merged.folderTrustFeature &&
+      // TODO: Update to avoid showing dialog for folders that are trusted.
+      settings.merged.folderTrust === undefined,
+  );
+
+  const handleFolderTrustSelect = useCallback(
+    (_choice: FolderTrustChoice) => {
+      // TODO: Store folderPath in the trusted folders config file based on the choice.
+      settings.setValue(SettingScope.User, 'folderTrust', true);
+      setIsFolderTrustDialogOpen(false);
+    },
+    [settings],
+  );
+
+  return {
+    isFolderTrustDialogOpen,
+    handleFolderTrustSelect,
+  };
+};