feat: Abort AI builder requests on chat stop (#17854)

packages/frontend/@n8n/rest-api-client/src/utils.ts

@@ -219,6 +219,7 @@ export async function streamRequest<T extends object>(
 	onDone?: () => void,
 	onError?: (e: Error) => void,
 	separator = STREAM_SEPERATOR,
+	abortSignal?: AbortSignal,
 ): Promise<void> {
 	const headers: Record<string, string> = {
 		'browser-id': getBrowserId(),
@@ -229,6 +230,7 @@ export async function streamRequest<T extends object>(
 		method: 'POST',
 		credentials: 'include',
 		body: JSON.stringify(payload),
+		signal: abortSignal,
 	};
 	try {
 		const response = await fetch(`${context.baseUrl}${apiEndpoint}`, assistantRequest);