fix：后台切前台导致网络报错问题解决

src/pages/team-battle.vue

@@ -296,6 +296,8 @@ onBeforeUnmount(() => {
 const refreshTimer = ref(null);
 onShow(async () => {
   if (battleId.value) {
+    // 延迟 300ms 等待网络恢复，避免小程序从后台切回时网络尚未就绪导致请求失败报错
+    await new Promise(resolve => setTimeout(resolve, 300));
     const result = await getBattleAPI(battleId.value);
     if (!result) return;
     if (result.status === 2) {