update /editor to new slash command arch (#4153)

Co-authored-by: Abhi <abhipatel@google.com>

packages/cli/src/ui/commands/editorCommand.test.ts

@@ -0,0 +1,30 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect } from 'vitest';
+import { editorCommand } from './editorCommand.js';
+// 1. Import the mock context utility
+import { createMockCommandContext } from '../../test-utils/mockCommandContext.js';
+
+describe('editorCommand', () => {
+  it('should return a dialog action to open the editor dialog', () => {
+    if (!editorCommand.action) {
+      throw new Error('The editor command must have an action.');
+    }
+    const mockContext = createMockCommandContext();
+    const result = editorCommand.action(mockContext, '');
+
+    expect(result).toEqual({
+      type: 'dialog',
+      dialog: 'editor',
+    });
+  });
+
+  it('should have the correct name and description', () => {
+    expect(editorCommand.name).toBe('editor');
+    expect(editorCommand.description).toBe('set external editor preference');
+  });
+});

packages/cli/src/ui/commands/editorCommand.ts

@@ -0,0 +1,16 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { type OpenDialogActionReturn, type SlashCommand } from './types.js';
+
+export const editorCommand: SlashCommand = {
+  name: 'editor',
+  description: 'set external editor preference',
+  action: (): OpenDialogActionReturn => ({
+    type: 'dialog',
+    dialog: 'editor',
+  }),
+};

packages/cli/src/ui/commands/types.ts

@@ -71,8 +71,7 @@ export interface MessageActionReturn {
  */
 export interface OpenDialogActionReturn {
   type: 'dialog';
-  // TODO: Add 'theme' | 'auth' | 'editor' | 'privacy' as migration happens.
-  dialog: 'help' | 'auth' | 'theme' | 'privacy';
+  dialog: 'help' | 'auth' | 'theme' | 'editor' | 'privacy';
 }
 
 /**