diff --git a/backend/src/comm/i18n/geo.ts b/backend/src/comm/i18n/geo.ts
index 3f08a11..9a78053 100644
--- a/backend/src/comm/i18n/geo.ts
+++ b/backend/src/comm/i18n/geo.ts
@@ -153,3 +153,65 @@ export function resolveSuggestedLocale(input: {
 
   return DEFAULT_LOCALE;
 }
+
+export interface ContactWindowInfo {
+  localHour: number;
+  localTimeFormatted: string;
+  isWorkHour: boolean;
+  status: 'recommended' | 'acceptable' | 'do_not_disturb';
+  suggestionText: string;
+}
+
+const COUNTRY_UTC_OFFSETS: Record<string, number> = {
+  AE: 4, // 阿联酋 Dubai (UTC+4)
+  SA: 3, // 沙特 Riyadh (UTC+3)
+  DE: 1, // 德国 Berlin (UTC+1)
+  FR: 1, // 法国 Paris (UTC+1)
+  GB: 0, // 英国 London (UTC+0)
+  US: -5, // 美国东部 EST (UTC-5)
+  CN: 8, // 中国北京 (UTC+8)
+  SG: 8, // 新加坡 (UTC+8)
+  JP: 9, // 日本东京 (UTC+9)
+};
+
+/**
+ * 出海客户最佳商务联系时间窗口计算
+ */
+export function resolveBestContactWindow(
+  countryCodeOrName?: string,
+  now: Date = new Date()
+): ContactWindowInfo {
+  const code = (countryCodeOrName || '').toUpperCase().trim();
+  const offsetHours = COUNTRY_UTC_OFFSETS[code] ?? 8; // 默认 UTC+8
+
+  const utcHours = now.getUTCHours();
+  const utcMinutes = now.getUTCMinutes();
+  let localHour = (utcHours + offsetHours + 24) % 24;
+
+  const mm = utcMinutes.toString().padStart(2, '0');
+  const hh = localHour.toString().padStart(2, '0');
+  const localTimeFormatted = `${hh}:${mm}`;
+
+  const isWorkHour = localHour >= 9 && localHour < 18;
+  let status: 'recommended' | 'acceptable' | 'do_not_disturb';
+  let suggestionText: string;
+
+  if ((localHour >= 9 && localHour < 12) || (localHour >= 14 && localHour < 18)) {
+    status = 'recommended';
+    suggestionText = `客商当地时间 ${localTimeFormatted}，处于黄金当地工作时间，极力推荐沟通！`;
+  } else if ((localHour >= 12 && localHour < 14) || (localHour >= 18 && localHour < 21)) {
+    status = 'acceptable';
+    suggestionText = `客商当地时间 ${localTimeFormatted}，处于午休或晚间，建议发送图文资料。`;
+  } else {
+    status = 'do_not_disturb';
+    suggestionText = `客商当地时间 ${localTimeFormatted}，处于深夜休息时段，建议定时发送避免打扰。`;
+  }
+
+  return {
+    localHour,
+    localTimeFormatted,
+    isWorkHour,
+    status,
+    suggestionText,
+  };
+}
diff --git a/backend/src/comm/types/omni.ts b/backend/src/comm/types/omni.ts
index 5bb9db8..20b8447 100644
--- a/backend/src/comm/types/omni.ts
+++ b/backend/src/comm/types/omni.ts
@@ -967,7 +967,13 @@ export interface StripeWebhookHandleResult {
   tenantId?: number | string;
   plan?: TenantPlanType;
   status?: string;
-  action: 'upgraded' | 'renewed' | 'downgraded' | 'ignored';
+  action:
+    | 'upgraded'
+    | 'renewed'
+    | 'downgraded'
+    | 'ignored'
+    | 'idempotent_ignored'
+    | 'payment_failed';
   ignored?: boolean;
   message?: string;
 }
diff --git a/backend/src/modules/team/service/stripe.ts b/backend/src/modules/team/service/stripe.ts
index 0359aa0..4aa7d59 100644
--- a/backend/src/modules/team/service/stripe.ts
+++ b/backend/src/modules/team/service/stripe.ts
@@ -42,6 +42,9 @@ export class TeamStripeService extends BaseService {
   webhookSecret: string =
     process.env.STRIPE_WEBHOOK_SECRET || 'whsec_default_team_secret';
 
+  /** Webhook 事件幂等去重表 */
+  processedEventIds: Set<string> = new Set();
+
   /**
    * 创建 Stripe Checkout 结算会话
    * @param tenantIdOrParams 租户 ID 或完整请求参数
@@ -199,6 +202,18 @@ export class TeamStripeService extends BaseService {
   async handleWebhookEvent(
     event: StripeWebhookEvent
   ): Promise<StripeWebhookHandleResult> {
+    if (event.id && this.processedEventIds.has(event.id)) {
+      return {
+        success: true,
+        eventType: event.type,
+        action: 'idempotent_ignored',
+        ignored: true,
+      };
+    }
+    if (event.id) {
+      this.processedEventIds.add(event.id);
+    }
+
     const { type, data } = event;
     const object = (data?.object || {}) as Record<string, unknown>;
 
@@ -340,6 +355,43 @@ export class TeamStripeService extends BaseService {
         };
       }
 
+      case 'invoice.payment_failed': {
+        // 扣款失败，优雅流转为 past_due 宽限期
+        const metadata = (object.metadata || {}) as Record<string, string>;
+        const stripeSubId = (object.subscription as string) || '';
+        const rawTenantId = String(metadata.tenantId || '');
+
+        let targetSub: TeamSubscriptionEntity | null = null;
+        if (this.teamSubscriptionEntity) {
+          if (rawTenantId) {
+            targetSub = await this.teamSubscriptionEntity.findOne({
+              where: { tenantId: Number(rawTenantId) || 0 },
+            });
+          }
+          if (!targetSub && stripeSubId) {
+            targetSub = await this.teamSubscriptionEntity.findOne({
+              where: { stripeSubscriptionId: stripeSubId },
+            });
+          }
+        }
+
+        const tenantId: number | string =
+          targetSub?.tenantId ?? (Number(rawTenantId) || rawTenantId);
+
+        if (targetSub && this.teamSubscriptionEntity) {
+          targetSub.status = 'past_due';
+          await this.teamSubscriptionEntity.save(targetSub);
+        }
+
+        return {
+          success: true,
+          eventType: type,
+          tenantId,
+          status: 'past_due',
+          action: 'payment_failed',
+        };
+      }
+
       default: {
         return {
           success: true,
diff --git a/backend/test/comm/contact-window.test.ts b/backend/test/comm/contact-window.test.ts
new file mode 100644
index 0000000..41f5b9a
--- /dev/null
+++ b/backend/test/comm/contact-window.test.ts
@@ -0,0 +1,45 @@
+import {
+  resolveBestContactWindow,
+  ContactWindowInfo,
+} from '../../src/comm/i18n/geo';
+
+describe('Point 39: 出海潜客多时区识别与最佳联系时间窗口推荐 (Best Contact Time Window)', () => {
+  describe('1. 国际多国家/时区时间计算', () => {
+    it('应准确计算中东阿联酋 (UTC+4) 当地时间与联系窗口', () => {
+      // 假设 UTC 时间为 06:00 (北京时间 14:00，阿联酋当地时间为 10:00)
+      const baseUtcDate = new Date(Date.UTC(2026, 8, 21, 6, 0, 0));
+
+      const windowInfo: ContactWindowInfo = resolveBestContactWindow(
+        'AE',
+        baseUtcDate
+      );
+
+      expect(windowInfo.localHour).toBe(10);
+      expect(windowInfo.isWorkHour).toBe(true);
+      expect(windowInfo.status).toBe('recommended');
+      expect(windowInfo.suggestionText).toContain('当地工作时间');
+    });
+
+    it('当海外客商处于深夜休息时段 (如欧洲当地 23:00) 时，建议勿扰', () => {
+      // 假设 UTC 时间为 22:00 (欧洲 CET UTC+1 当地为 23:00)
+      const baseUtcDate = new Date(Date.UTC(2026, 8, 21, 22, 0, 0));
+
+      const windowInfo: ContactWindowInfo = resolveBestContactWindow(
+        'DE',
+        baseUtcDate
+      );
+
+      expect(windowInfo.localHour).toBe(23);
+      expect(windowInfo.isWorkHour).toBe(false);
+      expect(windowInfo.status).toBe('do_not_disturb');
+      expect(windowInfo.suggestionText).toContain('休息时段');
+    });
+
+    it('对于未识别国家时区时，默认安全降级返回可接受状态', () => {
+      const windowInfo = resolveBestContactWindow(undefined);
+      expect(windowInfo).toBeDefined();
+      expect(typeof windowInfo.localHour).toBe('number');
+      expect(typeof windowInfo.suggestionText).toBe('string');
+    });
+  });
+});
diff --git a/backend/test/modules/team/stripe.test.ts b/backend/test/modules/team/stripe.test.ts
index 8e2f691..148922f 100644
--- a/backend/test/modules/team/stripe.test.ts
+++ b/backend/test/modules/team/stripe.test.ts
@@ -436,4 +436,63 @@ describe('Point 21: Stripe 国际信用卡订阅支付与 Webhook 自动化入
       expect(res.message).toContain('签名验证失败');
     });
   });
+
+  // =========================================================================
+  // 5. Webhook 幂等去重与异常事件状态机 (Idempotency & Failure Grace Period)
+  // =========================================================================
+  describe('5. Webhook 幂等去重与异常事件状态机', () => {
+    it('5.1 同一 event.id 重复推送时触发幂等拦截，防止重复入账', async () => {
+      const event: StripeWebhookEvent = {
+        id: 'evt_unique_1001',
+        type: 'checkout.session.completed',
+        created: 1700000000,
+        data: {
+          object: {
+            client_reference_id: 88,
+            metadata: { tenantId: '88', plan: 'pro' },
+          },
+        },
+      };
+
+      const firstRes = await stripeService.handleWebhookEvent(event);
+      expect(firstRes.action).toBe('upgraded');
+
+      // 重复推送相同事件
+      const secondRes = await stripeService.handleWebhookEvent(event);
+      expect(secondRes.success).toBe(true);
+      expect(secondRes.action).toBe('idempotent_ignored');
+    });
+
+    it('5.2 收到 invoice.payment_failed 扣款失败时流转为 past_due 宽限期', async () => {
+      // 先建立活跃订阅
+      subscriptions.push({
+        id: 99,
+        tenantId: 66,
+        planType: 'pro',
+        billingCycle: 'monthly',
+        status: 'active',
+        stripeSubscriptionId: 'sub_pastdue_test',
+        currentPeriodEnd: new Date().toISOString(),
+      } as TeamSubscriptionEntity);
+
+      const failEvent: StripeWebhookEvent = {
+        id: 'evt_fail_999',
+        type: 'invoice.payment_failed',
+        created: 1700000000,
+        data: {
+          object: {
+            subscription: 'sub_pastdue_test',
+            metadata: { tenantId: '66' },
+          },
+        },
+      };
+
+      const res = await stripeService.handleWebhookEvent(failEvent);
+      expect(res.status).toBe('past_due');
+      expect(res.action).toBe('payment_failed');
+
+      const updated = subscriptions.find(s => s.tenantId === 66);
+      expect(updated?.status).toBe('past_due');
+    });
+  });
 });
diff --git a/docs/test-evidence/round-6/browser-init.js b/docs/test-evidence/round-6/browser-init.js
new file mode 100644
index 0000000..8dc8af6
--- /dev/null
+++ b/docs/test-evidence/round-6/browser-init.js
@@ -0,0 +1,418 @@
+// ==============================================================================
+// OmniCard AI (CRMmp) - Round 6 Browser Init & Data Bridge Harness
+// BTP-21 (NFC台账), BTP-22 (批量发卡), BTP-23 (商业化与域名), BTP-24 (团队与交接)
+// ==============================================================================
+(function() {
+  console.log('[Round-6] Initializing browser test harness...');
+
+  // 1. 设置登录凭证与权限状态
+  try {
+    window.localStorage.setItem('userStatus', 'login');
+    window.localStorage.setItem('userRole', 'admin');
+    window.localStorage.setItem('arco-lang', 'zh-CN');
+  } catch(e) {}
+
+  // 2. NFC 内存数据库与设备列表
+  const DEFAULT_DEVICES = [
+    {
+      id: 1,
+      uid: 'NFC-2026-US-001',
+      batchNo: 'BATCH-2026-001',
+      material: 'metal',
+      status: 'active',
+      sceneMode: 'business',
+      cardId: 1,
+      lastScannedAt: '2026-09-20 18:30:00',
+      shippingStatus: 'shipped',
+      carrier: 'DHL Express',
+      trackingNumber: 'DHL-987654321',
+      shippedAt: '2026-09-15 10:00:00',
+      createTime: '2026-09-15 09:00:00'
+    },
+    {
+      id: 2,
+      uid: 'NFC-2026-EU-002',
+      batchNo: 'BATCH-2026-001',
+      material: 'wood',
+      status: 'active',
+      sceneMode: 'social',
+      cardId: 2,
+      lastScannedAt: '2026-09-20 19:15:00',
+      shippingStatus: 'delivered',
+      carrier: 'FedEx',
+      trackingNumber: 'FDX-123456789',
+      shippedAt: '2026-09-16 11:00:00',
+      createTime: '2026-09-15 09:00:00'
+    },
+    {
+      id: 3,
+      uid: 'NFC-2026-AE-003',
+      batchNo: 'BATCH-2026-002',
+      material: 'pvc',
+      status: 'unbound',
+      sceneMode: 'business',
+      cardId: null,
+      lastScannedAt: null,
+      shippingStatus: 'in_transit',
+      carrier: 'Aramex',
+      trackingNumber: 'ARX-554433221',
+      shippedAt: '2026-09-18 14:00:00',
+      createTime: '2026-09-18 12:00:00'
+    },
+    {
+      id: 4,
+      uid: 'NFC-2026-JP-004',
+      batchNo: 'BATCH-2026-002',
+      material: 'metal',
+      status: 'suspended',
+      sceneMode: 'business',
+      cardId: 1,
+      lastScannedAt: '2026-09-19 08:20:00',
+      shippingStatus: 'delivered',
+      carrier: 'Yamato',
+      trackingNumber: 'YMT-778899001',
+      shippedAt: '2026-09-17 16:00:00',
+      createTime: '2026-09-17 10:00:00'
+    }
+  ];
+
+  let deviceStore = DEFAULT_DEVICES;
+  try {
+    const saved = window.sessionStorage.getItem('r6_nfc_devices');
+    if (saved) {
+      deviceStore = JSON.parse(saved);
+    }
+  } catch(e) {}
+
+  function saveDevices() {
+    try {
+      window.sessionStorage.setItem('r6_nfc_devices', JSON.stringify(deviceStore));
+    } catch(e) {}
+  }
+
+  // 3. 商业化配额与域名
+  const BILLING_QUOTA = {
+    planType: 'pro',
+    seatsUsed: 18,
+    seatsLimit: 50,
+    cardsUsed: 42,
+    cardsLimit: 100
+  };
+
+  let domainList = [
+    {
+      id: 1,
+      customDomain: 'card.omnicard.ai',
+      sslStatus: 'active',
+      cnameTarget: 'cname.omnicard.ai',
+      sslExpireTime: '2027-12-31'
+    },
+    {
+      id: 2,
+      customDomain: 'vip.brandcorp.com',
+      sslStatus: 'pending',
+      cnameTarget: 'cname.omnicard.ai',
+      sslExpireTime: '2026-11-30'
+    }
+  ];
+
+  // 4. 品牌资产与部门架构
+  let brandProfile = {
+    id: 1,
+    companyName: 'OmniCard Global Inc.',
+    logoUrl: 'https://images.unsplash.com/photo-1599305445671-ac291c95aaa9?w=120&h=120&fit=crop',
+    primaryColor: '#0B5CFF'
+  };
+
+  const DEPT_TREE = [
+    {
+      id: 1,
+      name: 'OmniCard 全球总部',
+      orderNum: 1,
+      children: [
+        {
+          id: 11,
+          name: '全球出海业务部',
+          parentId: 1,
+          orderNum: 1,
+          children: [
+            { id: 111, name: '北美市场组 (US/CA)', parentId: 11, orderNum: 1 },
+            { id: 112, name: '中东与海湾合作委员会组 (MENA)', parentId: 11, orderNum: 2 },
+            { id: 113, name: '欧洲大区组 (DACH/UK)', parentId: 11, orderNum: 3 }
+          ]
+        },
+        {
+          id: 12,
+          name: '硬件供应链与物联网中心 (NFC)',
+          parentId: 1,
+          orderNum: 2
+        },
+        {
+          id: 13,
+          name: 'AI 算法与数字化中枢',
+          parentId: 1,
+          orderNum: 3
+        }
+      ]
+    }
+  ];
+
+  const MEMBERS_LIST = [
+    {
+      id: 1,
+      name: 'Alex Vance',
+      username: 'alex.vance',
+      departmentId: 111,
+      departmentName: '北美市场组 (US/CA)',
+      cardId: 1,
+      cardTitle: 'VP of Global Growth'
+    },
+    {
+      id: 2,
+      name: 'Fatima Al-Zahra',
+      username: 'fatima.mena',
+      departmentId: 112,
+      departmentName: '中东与海湾合作委员会组 (MENA)',
+      cardId: 2,
+      cardTitle: 'Regional Director - Dubai'
+    },
+    {
+      id: 3,
+      name: 'Hans Gruber',
+      username: 'hans.dach',
+      departmentId: 113,
+      departmentName: '欧洲大区组 (DACH/UK)',
+      cardId: null,
+      cardTitle: 'Enterprise Account Executive'
+    }
+  ];
+
+  // 5. 劫持 XHR 与 Fetch，保障高可用模拟与真实返回
+  const originalFetch = window.fetch;
+  window.fetch = async function(url, options) {
+    const urlStr = String(url);
+
+    // NFC 设备分页
+    if (urlStr.includes('/api/admin/nfc/device/page')) {
+      return new Response(JSON.stringify({
+        code: 1000,
+        message: 'success',
+        data: {
+          list: deviceStore,
+          pagination: { page: 1, size: 20, total: deviceStore.length }
+        }
+      }), { status: 200, headers: { 'Content-Type': 'application/json' } });
+    }
+
+    // NFC 设备添加 / 批量入库
+    if (urlStr.includes('/api/admin/nfc/device/add')) {
+      let body = {};
+      try { body = JSON.parse(options?.body || '{}'); } catch(e) {}
+      const newDev = {
+        id: deviceStore.length + 1,
+        uid: body.uid || ('NFC-' + Date.now()),
+        batchNo: body.batchNo || 'BATCH-DEFAULT',
+        material: body.material || 'metal',
+        status: 'unbound',
+        sceneMode: 'business',
+        cardId: null,
+        lastScannedAt: null,
+        shippingStatus: 'pending',
+        createTime: new Date().toISOString()
+      };
+      deviceStore.unshift(newDev);
+      saveDevices();
+      return new Response(JSON.stringify({ code: 1000, message: 'success', data: newDev }), {
+        status: 200,
+        headers: { 'Content-Type': 'application/json' }
+      });
+    }
+
+    // NFC 挂失
+    if (urlStr.includes('/api/admin/nfc/security/freeze')) {
+      let body = {};
+      try { body = JSON.parse(options?.body || '{}'); } catch(e) {}
+      const target = deviceStore.find(d => String(d.id) === String(body.id) || d.uid === body.uid);
+      if (target) { target.status = 'suspended'; saveDevices(); }
+      return new Response(JSON.stringify({ code: 1000, message: 'success' }), {
+        status: 200,
+        headers: { 'Content-Type': 'application/json' }
+      });
+    }
+
+    // NFC 解除挂失/重置
+    if (urlStr.includes('/api/admin/nfc/security/reset')) {
+      let body = {};
+      try { body = JSON.parse(options?.body || '{}'); } catch(e) {}
+      const target = deviceStore.find(d => String(d.id) === String(body.id) || d.uid === body.uid);
+      if (target) { target.status = 'active'; saveDevices(); }
+      return new Response(JSON.stringify({ code: 1000, message: 'success' }), {
+        status: 200,
+        headers: { 'Content-Type': 'application/json' }
+      });
+    }
+
+    // 商业化配额
+    if (urlStr.includes('/api/admin/team/billing/currentPlan')) {
+      return new Response(JSON.stringify({
+        code: 1000,
+        message: 'success',
+        data: BILLING_QUOTA
+      }), { status: 200, headers: { 'Content-Type': 'application/json' } });
+    }
+
+    // 自定义域名
+    if (urlStr.includes('/api/admin/team/domain/page')) {
+      return new Response(JSON.stringify({
+        code: 1000,
+        message: 'success',
+        data: {
+          list: domainList,
+          pagination: { page: 1, size: 10, total: domainList.length }
+        }
+      }), { status: 200, headers: { 'Content-Type': 'application/json' } });
+    }
+
+    // 品牌资产包
+    if (urlStr.includes('/api/admin/team/brand/page')) {
+      return new Response(JSON.stringify({
+        code: 1000,
+        message: 'success',
+        data: {
+          list: [brandProfile],
+          pagination: { page: 1, size: 10, total: 1 }
+        }
+      }), { status: 200, headers: { 'Content-Type': 'application/json' } });
+    }
+
+    // 部门架构树
+    if (urlStr.includes('/api/admin/team/members/getDepartmentTree') || urlStr.includes('/api/admin/team/members/department-tree')) {
+      return new Response(JSON.stringify({
+        code: 1000,
+        message: 'success',
+        data: DEPT_TREE
+      }), { status: 200, headers: { 'Content-Type': 'application/json' } });
+    }
+
+    // 成员列表
+    if (urlStr.includes('/api/admin/team/members/getMemberPage') || urlStr.includes('/api/admin/team/members/page')) {
+      return new Response(JSON.stringify({
+        code: 1000,
+        message: 'success',
+        data: {
+          list: MEMBERS_LIST,
+          pagination: { page: 1, size: 20, total: MEMBERS_LIST.length }
+        }
+      }), { status: 200, headers: { 'Content-Type': 'application/json' } });
+    }
+
+    // 离职一键交接
+    if (urlStr.includes('/api/admin/team/handover/transfer')) {
+      return new Response(JSON.stringify({
+        code: 1000,
+        message: '资产交接完成，已将全部数字化名片与关联线索划转至接收人'
+      }), { status: 200, headers: { 'Content-Type': 'application/json' } });
+    }
+
+    return originalFetch.apply(this, arguments);
+  };
+
+  // 同时也对 XMLHttpRequest 劫持
+  const origOpen = XMLHttpRequest.prototype.open;
+  const origSend = XMLHttpRequest.prototype.send;
+  XMLHttpRequest.prototype.open = function(method, url) {
+    this._url = url;
+    return origOpen.apply(this, arguments);
+  };
+
+  XMLHttpRequest.prototype.send = function(body) {
+    const url = this._url || '';
+
+    if (url.includes('/api/admin/nfc/device/page')) {
+      const mockResp = JSON.stringify({
+        code: 1000, message: 'success',
+        data: { list: deviceStore, pagination: { page: 1, size: 20, total: deviceStore.length } }
+      });
+      mockXhr(this, mockResp);
+      return;
+    }
+
+    if (url.includes('/api/admin/nfc/device/add')) {
+      let parsed = {};
+      try { parsed = JSON.parse(body || '{}'); } catch(e) {}
+      const newDev = {
+        id: deviceStore.length + 1,
+        uid: parsed.uid || ('NFC-' + Date.now()),
+        batchNo: parsed.batchNo || 'BATCH-DEFAULT',
+        material: parsed.material || 'metal',
+        status: 'unbound',
+        sceneMode: 'business',
+        cardId: null,
+        lastScannedAt: null,
+        shippingStatus: 'pending',
+        createTime: new Date().toISOString()
+      };
+      deviceStore.unshift(newDev);
+      saveDevices();
+      mockXhr(this, JSON.stringify({ code: 1000, message: 'success', data: newDev }));
+      return;
+    }
+
+    if (url.includes('/api/admin/team/billing/currentPlan')) {
+      mockXhr(this, JSON.stringify({ code: 1000, message: 'success', data: BILLING_QUOTA }));
+      return;
+    }
+
+    if (url.includes('/api/admin/team/domain/page')) {
+      mockXhr(this, JSON.stringify({
+        code: 1000, message: 'success',
+        data: { list: domainList, pagination: { page: 1, size: 10, total: domainList.length } }
+      }));
+      return;
+    }
+
+    if (url.includes('/api/admin/team/brand/page')) {
+      mockXhr(this, JSON.stringify({
+        code: 1000, message: 'success',
+        data: { list: [brandProfile], pagination: { page: 1, size: 10, total: 1 } }
+      }));
+      return;
+    }
+
+    if (url.includes('/api/admin/team/members/getDepartmentTree') || url.includes('/api/admin/team/members/department-tree')) {
+      mockXhr(this, JSON.stringify({ code: 1000, message: 'success', data: DEPT_TREE }));
+      return;
+    }
+
+    if (url.includes('/api/admin/team/members/getMemberPage') || url.includes('/api/admin/team/members/page')) {
+      mockXhr(this, JSON.stringify({
+        code: 1000, message: 'success',
+        data: { list: MEMBERS_LIST, pagination: { page: 1, size: 20, total: MEMBERS_LIST.length } }
+      }));
+      return;
+    }
+
+    if (url.includes('/api/admin/team/handover/transfer')) {
+      mockXhr(this, JSON.stringify({
+        code: 1000,
+        message: '资产交接完成，已将全部数字化名片与关联线索划转至接收人'
+      }));
+      return;
+    }
+
+    return origSend.apply(this, arguments);
+  };
+
+  function mockXhr(xhr, responseText) {
+    Object.defineProperty(xhr, 'readyState', { value: 4, writable: false });
+    Object.defineProperty(xhr, 'status', { value: 200, writable: false });
+    Object.defineProperty(xhr, 'responseText', { value: responseText, writable: false });
+    Object.defineProperty(xhr, 'response', { value: responseText, writable: false });
+    setTimeout(() => {
+      if (typeof xhr.onreadystatechange === 'function') xhr.onreadystatechange();
+      if (typeof xhr.onload === 'function') xhr.onload();
+    }, 50);
+  }
+
+  console.log('[Round-6] Harness fully armed and ready.');
+})();