feat(cli): disable folder trust in headless mode (#18407)

packages/core/src/utils/authConsent.ts

@@ -8,6 +8,7 @@ import readline from 'node:readline';
 import { CoreEvent, coreEvents } from './events.js';
 import { FatalAuthenticationError } from './errors.js';
 import { createWorkingStdio, writeToStdout } from './stdio.js';
+import { isHeadlessMode } from './headless.js';
 
 /**
  * Requests consent from the user for OAuth login.
@@ -17,7 +18,7 @@ export async function getConsentForOauth(prompt: string): Promise<boolean> {
   const finalPrompt = prompt + ' Opening authentication page in your browser. ';
 
   if (coreEvents.listenerCount(CoreEvent.ConsentRequest) === 0) {
-    if (!process.stdin.isTTY) {
+    if (isHeadlessMode()) {
       throw new FatalAuthenticationError(
         'Interactive consent could not be obtained.\n' +
           'Please run Gemini CLI in an interactive terminal to authenticate, or use NO_BROWSER=true for manual authentication.',