修复 lewan 虚拟号配额被占满：过期绑定自动回收、退号失败不再追加取号、取号占满增加冷却

apps/backend/src/services/fulfillment/kuaishou-cloud/binding-resources.ts

@@ -10,6 +10,10 @@ import {
 } from "../../platforms/cloudtentacles/virtual-number-service.js";
 import { KUAISHOU_CLOUD_FIXED_VN_KEY, type JsonObject } from "./domain.js";
 
+/** 账号号码配额占满后冷却：避免领取页轮询 / open-91 交付每轮都狂打上游 */
+const APPOINT_QUOTA_COOLDOWN_MS = 60_000;
+const appointQuotaCooldowns = new Map<string, number>();
+
 export function resolveKuaishouCloudBindingResources(
   flow: JsonObject,
   { skuItems = [], knapsackItems = [] }: { skuItems?: unknown[], knapsackItems?: unknown[] } = {}
@@ -77,11 +81,24 @@ export function resolveKuaishouCloudVnKeyCandidates(_input: JsonObject = {}) {
 export async function prepareKuaishouCloudBindResourceWithFallback(input: JsonObject = {}) {
   const { cloudContext = {}, vnKeyCandidates = [] } = input;
   const candidates = Array.isArray(vnKeyCandidates) ? vnKeyCandidates : [];
+  const sourceKey = String(cloudContext.resolvedSourceKey || "").trim();
   let lastError = null;
 
   for (const vnKey of candidates) {
     let vnId = 0;
     let vnPhone = "";
+    const cooldownKey = `${sourceKey}|${vnKey}`;
+
+    const cooldownUntil = appointQuotaCooldowns.get(cooldownKey) || 0;
+    if (cooldownUntil > Date.now()) {
+      throw createHttpError(
+        "账号虚拟号配额已满，请先退回已占用号码或稍后重试",
+        {
+          statusCode: 409,
+          errorCode: "cloudtentacles_vn_quota_cooldown",
+        }
+      );
+    }
 
     try {
       const appointed = await appointCloudtentaclesVirtualNumber({
@@ -132,6 +149,10 @@ export async function prepareKuaishouCloudBindResourceWithFallback(input: JsonOb
     } catch (error) {
       lastError = error;
 
+      if (isAppointQuotaExhaustedError(error)) {
+        appointQuotaCooldowns.set(cooldownKey, Date.now() + APPOINT_QUOTA_COOLDOWN_MS);
+      }
+
       if (vnId > 0) {
         try {
           await backCloudtentaclesVirtualNumber({
@@ -229,6 +250,15 @@ function isCloudSkuLikeItem(item: unknown): item is JsonObject {
   return Number(current.id || 0) > 0;
 }
 
+function isAppointQuotaExhaustedError(error: unknown) {
+  const current = error && typeof error === "object" ? error as JsonObject : {};
+  return (
+    String(current.errorCode || current.code || "").trim() ===
+      "cloudtentacles_vn_appoint_failed" &&
+    String(current.message || "").trim().includes("最多同时占用")
+  );
+}
+
 function isRecoverableKuaishouCloudVnKeyError(error: unknown) {
   const current = error && typeof error === "object" ? error as JsonObject : {};
   const errorCode = String(current.errorCode || current.code || "").trim();

apps/backend/src/services/fulfillment/kuaishou-cloud/prepare-fulfillment.ts

@@ -381,7 +381,8 @@ export async function refreshKuaishouCloudTaskBindUrl(task: TaskRow, options: Js
   const taskContext = parseTaskContext(task)
   const flow = normalizeKuaishouCloudFlow(taskContext.kuaishouCloudFulfillment)
   const source = String(options.source || 'system').trim() || 'system'
-  const allowSkipBack = options.allowSkipBack !== false
+  // 默认退号失败即中止：避免旧号没退掉又占新号，导致账号号码配额被净泄漏
+  const allowSkipBack = options.allowSkipBack === true
   const preferReuseVn = options.preferReuseVn !== false
 
   if (isKuaishouCloudBindingMutationFrozen(task, flow)) {