Fix/web fetch ctrl c abort (#24320)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/core/src/utils/fetch.ts

@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import { getErrorMessage, isNodeError } from './errors.js';
+import { getErrorMessage, isAbortError } from './errors.js';
 import { URL } from 'node:url';
 import { Agent, ProxyAgent, setGlobalDispatcher } from 'undici';
 import ipaddr from 'ipaddr.js';
@@ -202,7 +202,15 @@ export async function fetchWithTimeout(
     });
     return response;
   } catch (error) {
-    if (isNodeError(error) && error.code === 'ABORT_ERR') {
+    if (isAbortError(error)) {
+      // If the caller's own signal was already aborted, this is a user-initiated
+      // cancellation (e.g. Ctrl+C), not an internal timeout. Re-throw as a plain
+      // AbortError so the retry layer does NOT treat it as a retryable ETIMEDOUT.
+      if (options?.signal?.aborted) {
+        // Rethrow the original abort reason or the caught error to preserve
+        // the stack trace and any custom abort reason (e.g. from Ctrl+C).
+        throw options.signal.reason ?? error;
+      }
       throw new FetchError(`Request timed out after ${timeout}ms`, 'ETIMEDOUT');
     }
     throw new FetchError(getErrorMessage(error), undefined, { cause: error });