diff --git a/src/pages/global-ai/components/GlobalEntityPicker.vue b/src/pages/global-ai/components/GlobalEntityPicker.vue
index 75720cda..7952cb97 100644
--- a/src/pages/global-ai/components/GlobalEntityPicker.vue
+++ b/src/pages/global-ai/components/GlobalEntityPicker.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, ref, watch } from 'vue'
+import { computed, onUnmounted, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import type { AIEntityRef, ContactListItem, ContactsResponse } from '@openchatlab/shared-types'
 import { useDataService } from '@/services'
@@ -25,7 +25,9 @@ const contactResponses = ref<ContactsResponse[]>([])
 const loadingContacts = ref(false)
 const contactError = ref('')
 let searchTimer: ReturnType<typeof setTimeout> | null = null
+let pollTimer: ReturnType<typeof setTimeout> | null = null
 let requestId = 0
+const CONTACTS_POLL_INTERVAL_MS = 1500
 
 const normalizedQuery = computed(() => query.value.trim().toLocaleLowerCase())
 const groups = computed(() => {
@@ -70,12 +72,39 @@ function remove(entity: AIEntityRef): void {
   )
 }
 
-async function loadContacts(): Promise<void> {
+function stopContactsPolling(): void {
+  if (!pollTimer) return
+  clearTimeout(pollTimer)
+  pollTimer = null
+}
+
+function scheduleContactsPolling(responses: ContactsResponse[]): void {
+  stopContactsPolling()
+  if (!open.value || activeType.value !== 'contacts') return
+  if (!responses.some((response) => response.task?.status === 'running')) return
+
+  pollTimer = setTimeout(() => {
+    pollTimer = null
+    void loadContacts({ silent: true })
+  }, CONTACTS_POLL_INTERVAL_MS)
+}
+
+function stopPendingContactWork(): void {
+  requestId++
+  loadingContacts.value = false
+  if (searchTimer) {
+    clearTimeout(searchTimer)
+    searchTimer = null
+  }
+  stopContactsPolling()
+}
+
+async function loadContacts(loadOptions?: { silent?: boolean }): Promise<void> {
   const currentRequest = ++requestId
-  loadingContacts.value = true
+  if (!loadOptions?.silent) loadingContacts.value = true
   contactError.value = ''
   try {
-    const options = {
+    const requestOptions = {
       acceptStale: true,
       timeRangePreset: 'all',
       page: 1,
@@ -83,8 +112,8 @@ async function loadContacts(): Promise<void> {
       query: query.value.trim() || undefined,
     } as const
     const responses = await Promise.all([
-      dataService.getContacts({ ...options, pool: 'friend' }),
-      dataService.getContacts({ ...options, pool: 'non_friend' }),
+      dataService.getContacts({ ...requestOptions, pool: 'friend' }),
+      dataService.getContacts({ ...requestOptions, pool: 'non_friend' }),
     ])
     if (currentRequest !== requestId) return
 
@@ -92,24 +121,45 @@ async function loadContacts(): Promise<void> {
     responses.flatMap((response) => response.contacts).forEach((contact) => byKey.set(contact.key, contact))
     contacts.value = [...byKey.values()]
     contactResponses.value = responses
+    scheduleContactsPolling(responses)
   } catch (error) {
     if (currentRequest !== requestId) return
+    stopContactsPolling()
     contactError.value = error instanceof Error ? error.message : String(error)
     contacts.value = []
     contactResponses.value = []
   } finally {
-    if (currentRequest === requestId) loadingContacts.value = false
+    if (currentRequest === requestId && !loadOptions?.silent) loadingContacts.value = false
   }
 }
 
 watch(open, (isOpen) => {
-  if (isOpen) void loadContacts()
+  if (isOpen) {
+    void loadContacts()
+  } else {
+    stopPendingContactWork()
+  }
+})
+
+watch(activeType, (type) => {
+  if (!open.value) return
+  stopPendingContactWork()
+  if (type === 'contacts') void loadContacts()
 })
 
 watch(query, () => {
   if (!open.value || activeType.value !== 'contacts') return
+  requestId++
   if (searchTimer) clearTimeout(searchTimer)
-  searchTimer = setTimeout(() => void loadContacts(), 250)
+  stopContactsPolling()
+  searchTimer = setTimeout(() => {
+    searchTimer = null
+    void loadContacts()
+  }, 250)
+})
+
+onUnmounted(() => {
+  stopPendingContactWork()
 })
 </script>
 
@@ -160,7 +210,7 @@ watch(query, () => {
               </div>
               <div v-else-if="contactError" class="px-3 py-8 text-center text-xs text-red-500">
                 <p>{{ t('ai.global.entityPicker.loadFailed') }}</p>
-                <UButton size="xs" variant="link" class="mt-1" @click="loadContacts">
+                <UButton size="xs" variant="link" class="mt-1" @click="loadContacts()">
                   {{ t('common.retry') }}
                 </UButton>
               </div>
diff --git a/src/pages/global-ai/index.vue b/src/pages/global-ai/index.vue
index d701b812..0c626906 100644
--- a/src/pages/global-ai/index.vue
+++ b/src/pages/global-ai/index.vue
@@ -38,6 +38,7 @@ const input = ref('')
 const selectedEntities = ref<AIEntityRef[]>([])
 const isComposing = ref(false)
 let isUnmounted = false
+let conversationSelectionRequestId = 0
 
 function isGlobalPageActive(): boolean {
   return !isUnmounted && route.name === 'global-ai'
@@ -80,18 +81,26 @@ async function loadConversations(): Promise<void> {
 }
 
 async function selectConversation(aiChatId: string): Promise<void> {
-  if (!(await aiChatStore.loadAIChat(chatKey, aiChatId))) {
+  const currentRequest = ++conversationSelectionRequestId
+  const loaded = await aiChatStore.loadAIChat(chatKey, aiChatId)
+  if (currentRequest !== conversationSelectionRequestId || !isGlobalPageActive()) return
+
+  if (!loaded) {
     toast.fail(t('ai.global.toast.loadFailed'))
     return
   }
+  initializing.value = false
   selectedEntities.value = []
   await syncAIChatIdToRoute(aiChatId)
+  if (currentRequest !== conversationSelectionRequestId || !isGlobalPageActive()) return
   await nextTick()
   scrollToBottom(true)
 }
 
 function startNewConversation(): void {
+  conversationSelectionRequestId++
   if (!aiChatStore.startNewAIChat(chatKey)) return
+  initializing.value = false
   selectedEntities.value = []
   input.value = ''
   void syncAIChatIdToRoute(null)
@@ -175,9 +184,10 @@ onMounted(async () => {
   await loadConversations()
   if (!isGlobalPageActive()) return
 
+  const currentSelectionRequest = ++conversationSelectionRequestId
   const preferredAIChatId = typeof route.query.aiChatId === 'string' ? route.query.aiChatId : null
   const restoredPreferredChat = preferredAIChatId ? await aiChatStore.loadAIChat(chatKey, preferredAIChatId) : false
-  if (!isGlobalPageActive()) return
+  if (currentSelectionRequest !== conversationSelectionRequestId || !isGlobalPageActive()) return
 
   if (!restoredPreferredChat) {
     aiChatStore.startNewAIChat(chatKey)
@@ -196,6 +206,7 @@ onMounted(async () => {
 
 onUnmounted(() => {
   isUnmounted = true
+  conversationSelectionRequestId++
 })
 </script>
 
diff --git a/src/stores/aiChat.ts b/src/stores/aiChat.ts
index e523ac38..2b97436f 100644
--- a/src/stores/aiChat.ts
+++ b/src/stores/aiChat.ts
@@ -334,6 +334,17 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
   const { aiGlobalSettings } = storeToRefs(promptStore)
 
   let pendingFocusReturnChatKey: string | null = null
+  const aiChatSelectionGenerations = new Map<string, number>()
+
+  function advanceAIChatSelection(chatKey: string): number {
+    const generation = (aiChatSelectionGenerations.get(chatKey) ?? 0) + 1
+    aiChatSelectionGenerations.set(chatKey, generation)
+    return generation
+  }
+
+  function isLatestAIChatSelection(chatKey: string, generation: number): boolean {
+    return aiChatSelectionGenerations.get(chatKey) === generation
+  }
 
   function generateId(prefix: string): string {
     return `${prefix}_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`
@@ -550,9 +561,12 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
   async function loadAIChat(chatKey: string, aiChatId: string): Promise<boolean> {
     const state = getSessionState(chatKey)
     if (!state) return false
+    const selectionGeneration = advanceAIChatSelection(chatKey)
 
     try {
       const conversation = await useAIService().getAIChat(aiChatId)
+      if (!isLatestAIChatSelection(chatKey, selectionGeneration)) return false
+
       const belongsToState =
         conversation?.kind === state.kind && (state.kind === 'global' || conversation.sessionId === state.sessionId)
       if (!conversation || !belongsToState) return false
@@ -564,6 +578,8 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
           useAIService().getMessages(aiChatId),
           useAIService().getAIChatTokenUsage(aiChatId),
         ])
+        if (!isLatestAIChatSelection(chatKey, selectionGeneration)) return false
+
         buffer.messages.splice(0, buffer.messages.length, ...history.map((msg) => toRuntimeMessage(msg)))
         buffer.sourceMessages.splice(0, buffer.sourceMessages.length)
         buffer.currentKeywords.splice(0, buffer.currentKeywords.length)
@@ -571,11 +587,13 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
         buffer.loaded = true
       }
 
+      if (!isLatestAIChatSelection(chatKey, selectionGeneration)) return false
       buffer.assistantId = conversation.assistantId
       bindDisplayedBuffer(state, aiChatId)
       applySessionAssistantSelection(chatKey)
       return true
     } catch (error) {
+      if (!isLatestAIChatSelection(chatKey, selectionGeneration)) return false
       console.error('[AI] 加载对话历史失败：', error)
       return false
     }
@@ -590,6 +608,7 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
       return false
     }
 
+    advanceAIChatSelection(chatKey)
     bindDisplayedBuffer(state, bufferKey)
     applySessionAssistantSelection(chatKey)
     return true
@@ -637,6 +656,7 @@ export const useAIChatStore = defineStore('aiChatRuntime', () => {
     const state = getSessionState(chatKey)
     if (!state || state.isAIThinking) return false
 
+    advanceAIChatSelection(chatKey)
     const draftBuffer = createAIChatBuffer(state.selectedAssistantId)
     state.aiChatBuffers[DRAFT_AI_CHAT_KEY] = draftBuffer
     bindDisplayedBuffer(state, DRAFT_AI_CHAT_KEY)
diff --git a/src/stores/aiChatNavigation.test.ts b/src/stores/aiChatNavigation.test.ts
index 7c5aa928..8b50e10a 100644
--- a/src/stores/aiChatNavigation.test.ts
+++ b/src/stores/aiChatNavigation.test.ts
@@ -3,26 +3,31 @@ import test from 'node:test'
 import { createPinia, setActivePinia } from 'pinia'
 import { ref } from 'vue'
 
-test('restores requested AI chats without leaking global task navigation state', async (t) => {
+test('restores only the latest requested AI chat without leaking navigation state', async (t) => {
+  const makeConversation = (id: string) => ({
+    id,
+    sessionId: 'session-one',
+    kind: 'session' as const,
+    title: 'Saved chat',
+    assistantId: 'assistant-one',
+    createdAt: 1,
+    updatedAt: 1,
+  })
+  let resolveSlowConversation!: (conversation: ReturnType<typeof makeConversation>) => void
+  const slowConversation = new Promise<ReturnType<typeof makeConversation>>((resolve) => {
+    resolveSlowConversation = resolve
+  })
   const aiService = {
-    getAIChat: async (id: string) =>
-      id === 'chat-one'
-        ? {
-            id,
-            sessionId: 'session-one',
-            kind: 'session' as const,
-            title: 'Saved chat',
-            assistantId: 'assistant-one',
-            createdAt: 1,
-            updatedAt: 1,
-          }
-        : null,
-    getMessages: async () => [
+    getAIChat: async (id: string) => {
+      if (id === 'chat-slow') return slowConversation
+      return id === 'chat-one' || id === 'chat-latest' ? makeConversation(id) : null
+    },
+    getMessages: async (aiChatId: string) => [
       {
-        id: 'message-one',
-        aiChatId: 'chat-one',
+        id: `message-${aiChatId}`,
+        aiChatId,
         role: 'assistant' as const,
-        content: 'Saved answer',
+        content: `Saved answer for ${aiChatId}`,
         timestamp: 1,
       },
     ],
@@ -80,7 +85,7 @@ test('restores requested AI chats without leaking global task navigation state',
   await store.resetToSelectorOnEnter(first.chatKey, 'chat-one')
 
   assert.equal(first.state.currentAIChatId, 'chat-one')
-  assert.equal(first.state.messages[0]?.content, 'Saved answer')
+  assert.equal(first.state.messages[0]?.content, 'Saved answer for chat-one')
 
   const second = store.ensureSessionState({
     sessionId: 'session-two',
@@ -93,6 +98,14 @@ test('restores requested AI chats without leaking global task navigation state',
   assert.equal(second.state.currentAIChatId, null)
   assert.equal(second.state.messages.length, 0)
 
+  const staleLoad = store.loadAIChat(first.chatKey, 'chat-slow')
+  assert.equal(await store.loadAIChat(first.chatKey, 'chat-latest'), true)
+  resolveSlowConversation(makeConversation('chat-slow'))
+
+  assert.equal(await staleLoad, false)
+  assert.equal(first.state.currentAIChatId, 'chat-latest')
+  assert.equal(first.state.messages[0]?.content, 'Saved answer for chat-latest')
+
   const global = store.ensureGlobalState('zh-CN')
   store.activeTask = {
     requestId: 'global-request',
@@ -111,5 +124,5 @@ test('restores requested AI chats without leaking global task navigation state',
   await store.resetToSelectorOnEnter(first.chatKey, 'chat-one')
 
   assert.equal(first.state.currentAIChatId, 'chat-one')
-  assert.equal(first.state.messages[0]?.content, 'Saved answer')
+  assert.equal(first.state.messages[0]?.content, 'Saved answer for chat-one')
 })