修复 lewan 发货后 claim 轮询换号污染绑定与 UID 展示

发货成功时写入 shipped 身份快照，并冻结绑定资源变更；后台 UID 匹配优先使用发货快照，避免误报不一致。

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

@@ -2,13 +2,21 @@ import {
   prepareFulfillmentBinding,
   refreshFulfillmentRole,
 } from '../fulfillment/executors/registry.js'
-import { normalizeKuaishouCloudFlow } from '../fulfillment/kuaishou-cloud/index.js'
+import {
+  isKuaishouCloudBindingMutationFrozen,
+  normalizeKuaishouCloudFlow,
+} from '../fulfillment/kuaishou-cloud/index.js'
 import type { TaskRow } from '../../types/repository/rows.js'
 import { parseTaskContext as parseTaskContextValue } from '../../utils/task-json.js'
 
 export async function syncKuaishouCloudRoleInfo(task: TaskRow) {
   const flow = normalizeKuaishouCloudFlow(parseTaskContext(task).kuaishouCloudFulfillment)
 
+  // 已发货/兑换中：禁止 claim 轮询换号或覆盖角色（脏单 status 可能已回退 waiting_binding）
+  if (isKuaishouCloudBindingMutationFrozen(task, flow)) {
+    return task
+  }
+
   if (!flow.binding.vnId || !flow.binding.vnKey || !flow.binding.vnPhone) {
     // ticket verified 或绑定尚未 ready：补 prepare（覆盖提前核销后未取号场景）
     if (