修复推送报错:确定为服务端没有安装webman/push扩展，移除冗余代码

web/src/views/backend/game/live/index.vue

@@ -134,7 +134,6 @@ interface Snapshot {
 const { t } = useI18n()
 const loading = ref(false)
 const pushConnected = ref(false)
-const lastPushAt = ref(0)
 const snapshot = reactive<Snapshot>({
     record: null,
     bets: [],
@@ -271,10 +270,12 @@ async function initPush() {
         pushClient = new PushCtor({ url, app_key })
         pushChannel = pushClient.subscribe(channel)
         pushConnected.value = false
+        pushChannel.on('pusher:subscription_succeeded', () => {
+            pushConnected.value = true
+        })
         startPushWatchdog()
         stopPolling()
         pushChannel.on(event, (payload: anyObj) => {
-            lastPushAt.value = Date.now()
             pushConnected.value = true
             snapshot.record = payload.record || null
             snapshot.bets = payload.bets || []
@@ -417,10 +418,14 @@ function startPushWatchdog() {
         return
     }
     pushWatchdogTimer = window.setInterval(() => {
-        const state = pushClient && pushClient.connection ? String(pushClient.connection.state || '') : ''
-        const stateConnected = state === 'connected' || state === 'connecting'
-        const hasRecentPush = lastPushAt.value > 0 && Date.now() - lastPushAt.value <= 6000
-        if (!stateConnected || !hasRecentPush) {
+        if (!pushClient || !pushClient.connection) {
+            pushConnected.value = false
+            return
+        }
+        const state = String(pushClient.connection.state || '')
+        // push.js：onOpen 后长期为 connecting，必须收到 pusher:connection_established 才变 connected。
+        // 把 connecting 当「已连接」会误报绿条（Nginx 只完成握手、帧未透传时 DevTools 消息列表为空）。
+        if (state === 'disconnected') {
             pushConnected.value = false
         }
     }, 1000)