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/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,
+  };
+}

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;
 }

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,