fix(core): clear 5-minute timeouts in oauth flow to prevent memory leaks (#24968)

packages/core/src/code_assist/oauth2.ts

@@ -424,6 +424,7 @@ async function authWithUserCode(client: OAuth2Client): Promise<boolean> {
         '\n\n',
     );
 
+    let authTimeoutId: NodeJS.Timeout | undefined;
     const code = await new Promise<string>((resolve, reject) => {
       const rl = readline.createInterface({
         input: process.stdin,
@@ -431,20 +432,29 @@ async function authWithUserCode(client: OAuth2Client): Promise<boolean> {
         terminal: true,
       });
 
-      const timeout = setTimeout(() => {
-        rl.close();
-        reject(
+      const abortController = new AbortController();
+      authTimeoutId = setTimeout(() => {
+        abortController.abort(
           new FatalAuthenticationError(
             'Authorization timed out after 5 minutes.',
           ),
         );
       }, 300000); // 5 minute timeout
+      authTimeoutId.unref();
+
+      const onAbort = () => {
+        rl.close();
+        reject(abortController.signal.reason);
+      };
+      abortController.signal.addEventListener('abort', onAbort, { once: true });
 
       rl.question('Enter the authorization code: ', (code) => {
-        clearTimeout(timeout);
+        abortController.signal.removeEventListener('abort', onAbort);
         rl.close();
         resolve(code.trim());
       });
+    }).finally(() => {
+      if (authTimeoutId) clearTimeout(authTimeoutId);
     });
 
     if (!code) {