feat(round-10): 新增出海潜客多时区最佳联系窗口算法与Stripe回调幂等性防重处理 (79套件957测试全绿)

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');
+    });
+  });
+});

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');
+    });
+  });
 });