fix(ui): handle headless execution in credits and upgrade dialogs (#21850)

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

@@ -7,6 +7,7 @@
 import {
   AuthType,
   openBrowserSecurely,
+  shouldLaunchBrowser,
   UPGRADE_URL_PAGE,
 } from '@google/gemini-cli-core';
 import type { SlashCommand } from './types.js';
@@ -35,6 +36,14 @@ export const upgradeCommand: SlashCommand = {
       };
     }
 
+    if (!shouldLaunchBrowser()) {
+      return {
+        type: 'message',
+        messageType: 'info',
+        content: `Please open this URL in a browser: ${UPGRADE_URL_PAGE}`,
+      };
+    }
+
     try {
       await openBrowserSecurely(UPGRADE_URL_PAGE);
     } catch (error) {