收紧生成任务轮询与资产读取路径

空生成任务列表不再保持四秒轮询

读取资源字节优先通过read-url直连OSS

保留read-bytes作为OSS读取失败兜底

更新资产导出与项目记忆文档口径

src/components/platform-entry/platformExternalGenerationQueueStatusModel.ts

@@ -55,6 +55,48 @@ export function buildExternalGenerationQueueStatus(
   };
 }
 
+function isActiveExternalGenerationStatus(
+  status: ExternalGenerationQueueStatus['currentStatus'],
+) {
+  return status === 'queued' || status === 'running';
+}
+
+function isUnacknowledgedExternalGenerationTerminalTask(
+  task: ExternalGenerationTaskRecord,
+) {
+  return (
+    (task.status === 'completed' || task.status === 'failed') &&
+    !task.notificationAcknowledgedAt
+  );
+}
+
+export function shouldUseFastExternalGenerationTaskPolling(
+  status: ExternalGenerationQueueStatus | null | undefined,
+) {
+  const pendingCount = normalizeExternalGenerationQueueCount(
+    status?.pendingCount,
+  );
+  const runningCount = normalizeExternalGenerationQueueCount(
+    status?.runningCount,
+  );
+  const unacknowledgedTerminalCount = normalizeExternalGenerationQueueCount(
+    status?.unacknowledgedTerminalCount,
+  );
+
+  return Boolean(
+    isActiveExternalGenerationStatus(status?.currentStatus ?? null) ||
+      pendingCount > 0 ||
+      runningCount > 0 ||
+      unacknowledgedTerminalCount > 0 ||
+      (status?.tasks ?? []).some(
+        (task) =>
+          task.status === 'queued' ||
+          task.status === 'running' ||
+          isUnacknowledgedExternalGenerationTerminalTask(task),
+      ),
+  );
+}
+
 export function resolveExternalGenerationQueueStatusLabel(
   status: ExternalGenerationQueueStatus['currentStatus'],
 ) {