修复 affiliate-dash 提交成功(delivered)后结果页数秒后才显示成功

- syncAffiliateDashTaskStatus 新增 snapshotOnly:submit 拿到 delivered 后直接用本地快照收敛任务为 REDEEMED,不等平台回调(此前要等 delivered notify 落地,约 9 秒)
- 新增终态保护:已 REDEEMED/MANUAL_REVIEW/CLOSED/FAILED 的任务,非 delivered 状态不再降级(轮询时平台详情短暂返回 paid/delivering 会把成功任务打回 REDEEMING)
- submitAffiliateDashClaim:result.status=delivered 时重新读任务并 snapshotOnly 收敛

apps/backend/src/services/claim/kuaishou-cloud-claim-service.ts

@@ -1,5 +1,5 @@
 import { createTaskEvent } from '../../repositories/task-event-repo.js'
-import { updateTask } from '../../repositories/task-repo.js'
+import { getTaskById, updateTask } from '../../repositories/task-repo.js'
 import { createHttpError } from '../../utils/http.js'
 import { parseTaskContext as parseTaskContextValue } from '../../utils/task-json.js'
 import { nowIso } from '../../utils/time.js'
@@ -456,6 +456,15 @@ export async function submitAffiliateDashClaim(
     now,
   )
 
+  // 平台已返回 delivered：立即用本地快照收敛任务为成功，不等平台回调（避免结果页等数秒）。
+  // delivered 回调到达时 sync 幂等短路（已 REDEEMED 且 delivered 仍会刷新，无副作用）。
+  if (result.status === 'delivered') {
+    const refreshedTask = await getTaskById(task.id)
+    if (refreshedTask) {
+      await syncAffiliateDashTaskStatus(refreshedTask, { snapshotOnly: true })
+    }
+  }
+
   return getKuaishouCloudClaimDetail(token)
 }