fix: 增加轮询消息无数据报错

src/app/[locale]/providers.tsx

@@ -199,7 +199,7 @@ const PollingClient = () => {
                 setWallet(user_info);
             }
             //  系统通知
-            if (notices.length !== system_notice?.data.length) {
+            if (notices.length !== system_notice?.data?.length) {
                 setNotices(system_notice?.data || [], system_notice?.summery?.unread || 0);
             }
             if (promotion_count !== system_notice?.summery?.promotion_count) {