refactor: split feishu helpers and tests

extensions/feishu/src/async.ts

@@ -60,3 +60,27 @@ export async function raceWithTimeoutAndAbort<T>(
     }
   }
 }
+
+export function waitForAbortableDelay(
+  delayMs: number,
+  abortSignal?: AbortSignal,
+): Promise<boolean> {
+  if (abortSignal?.aborted) {
+    return Promise.resolve(false);
+  }
+
+  return new Promise((resolve) => {
+    const handleAbort = () => {
+      clearTimeout(timer);
+      resolve(false);
+    };
+
+    const timer = setTimeout(() => {
+      abortSignal?.removeEventListener("abort", handleAbort);
+      resolve(true);
+    }, delayMs);
+    timer.unref?.();
+
+    abortSignal?.addEventListener("abort", handleAbort, { once: true });
+  });
+}