perf(web): optimize API polling frequency and respect page visibility

web/src/components/NodeSwitcher.vue

@@ -37,8 +37,9 @@ function handleNodeChange(val: any) {
 
 function startPolling() {
   stopPolling()
+  if (document.visibilityState === 'hidden') return
   loadNodes()
-  timer = setInterval(loadNodes, 30000)
+  timer = setInterval(loadNodes, 120000) // 放宽至 2 分钟一次
 }
 
 function stopPolling() {
@@ -48,6 +49,16 @@ function stopPolling() {
   }
 }
 
+function handleVisibilityChange() {
+  if (document.visibilityState === 'visible') {
+    if (isMaster.value) {
+      startPolling()
+    }
+  } else {
+    stopPolling()
+  }
+}
+
 async function checkRoleAndInit() {
   try {
     const role = await api.settings.get('interconnect', 'interconnect_role')
@@ -86,10 +97,12 @@ roleBus.on((newRole) => {
 
 onMounted(async () => {
   await checkRoleAndInit()
+  document.addEventListener('visibilitychange', handleVisibilityChange)
 })
 
 onUnmounted(() => {
   stopPolling()
+  document.removeEventListener('visibilitychange', handleVisibilityChange)
 })
 </script>
 

web/src/components/SystemNotice.vue

@@ -9,6 +9,9 @@ import { api, type AppLog, LOG_CATEGORY, LOG_STATUS } from '@/api'
 import { toast } from 'vue-sonner'
 import { format } from 'date-fns'
 
+import { eventBus } from '@/utils/event-bus'
+import { LOG_EVENTS } from '@/constants'
+
 const notices = ref<AppLog[]>([])
 const unreadCount = ref(0)
 const loading = ref(false)
@@ -56,12 +59,27 @@ async function markAllAsRead() {
 }
 
 let timer: number
+let unsubscribe: () => void
+
 onMounted(() => {
   fetchNotices()
-  timer = window.setInterval(fetchNotices, 60000) // 每分钟拉取一次
+  
+  // 订阅 WebSocket 实时事件，在收到新系统日志通知时主动刷新
+  unsubscribe = eventBus.subscribe((msg) => {
+    if (msg.type === LOG_EVENTS.ADDED) {
+      const log = msg.payload
+      if (log && log.category === LOG_CATEGORY.SYSTEM_NOTICE) {
+        fetchNotices()
+      }
+    }
+  })
+
+  // 10 分钟一次的长轮询作为断连兜底
+  timer = window.setInterval(fetchNotices, 10 * 60 * 1000)
 })
 
 onUnmounted(() => {
+  if (unsubscribe) unsubscribe()
   if (timer) clearInterval(timer)
 })
 

web/src/views/agents/Agents.vue

@@ -64,6 +64,16 @@ async function loadAgents() {
   }
 }
 
+async function refreshAgentsOnly() {
+  if (document.visibilityState === 'hidden') return
+  try {
+    const agentList = await api.agents.list()
+    agents.value = agentList
+  } catch (e) {
+    console.error('Failed to poll agent status', e)
+  }
+}
+
 // Handler functions for Agent
 function viewDetail(agent: Agent) {
   agentDetailDialogRef.value?.openDialog(agent)
@@ -103,13 +113,37 @@ function openEditToken(token: AgentToken) {
   editTokenDialogRef.value?.openEdit(token)
 }
 
+function startPolling() {
+  stopPolling()
+  if (document.visibilityState === 'hidden') return
+  refreshTimer = setInterval(refreshAgentsOnly, 30000) // 仅轮询 Agent 在线状态，频率放宽至 30s
+}
+
+function stopPolling() {
+  if (refreshTimer) {
+    clearInterval(refreshTimer)
+    refreshTimer = null
+  }
+}
+
+function handleVisibilityChange() {
+  if (document.visibilityState === 'visible') {
+    refreshAgentsOnly()
+    startPolling()
+  } else {
+    stopPolling()
+  }
+}
+
 onMounted(() => {
   loadAgents()
-  refreshTimer = setInterval(loadAgents, 10000)
+  startPolling()
+  document.addEventListener('visibilitychange', handleVisibilityChange)
 })
 
 onUnmounted(() => {
-  if (refreshTimer) clearInterval(refreshTimer)
+  stopPolling()
+  document.removeEventListener('visibilitychange', handleVisibilityChange)
 })
 </script>