diff --git a/packages/node-runtime/src/services/analytics.test.ts b/packages/node-runtime/src/services/analytics.test.ts
index fb4450e2..dfb0b694 100644
--- a/packages/node-runtime/src/services/analytics.test.ts
+++ b/packages/node-runtime/src/services/analytics.test.ts
@@ -144,6 +144,44 @@ test('track normalizes the shared locale instead of accepting arbitrary event da
   }
 })
 
+test('insight telemetry accepts only public tab categories and never forwards chat identifiers', async (t) => {
+  const systemDir = createTempSystemDir()
+  t.after(() => rmSync(systemDir, { recursive: true, force: true }))
+  const bodies: Array<{ payload: { name: string; url: string; data: Record<string, unknown> } }> = []
+  t.mock.method(globalThis, 'fetch', async (_input: unknown, init?: RequestInit) => {
+    bodies.push(JSON.parse(String(init?.body)))
+    return new Response(null, { status: 204 })
+  })
+  const service = new AnalyticsService(systemDir, createOptions())
+  assert.equal(await service.track('insight_viewed', { chat_type: 'group' }), true)
+  assert.equal(
+    await service.track('insight_tab_used', {
+      chat_type: 'private',
+      tab_id: 'journey',
+      session_id: 'secret-chat',
+      name: 'Alice',
+      text: 'private message',
+    }),
+    true
+  )
+  assert.equal(bodies[0].payload.url, '/insights/group')
+  assert.equal(bodies[1].payload.url, '/insights/private/journey')
+  assert.equal(bodies[1].payload.data.chat_type, 'private')
+  assert.equal(bodies[1].payload.data.tab_id, 'journey')
+  assert.equal(JSON.stringify(bodies).includes('secret-chat'), false)
+  assert.equal('name' in bodies[1].payload.data, false)
+  assert.equal('text' in bodies[1].payload.data, false)
+  for (const props of [
+    { chat_type: 'group', tab_id: 'journey' },
+    { chat_type: 'group', tab_id: '/private/path' },
+    { chat_type: 'secret-chat', tab_id: 'overview' },
+    { chat_type: 'private' },
+  ])
+    assert.equal(await service.track('insight_tab_used', props), false)
+  assert.equal(await service.track('insight_viewed', { chat_type: 'secret-chat' }), false)
+  assert.equal(bodies.length, 2)
+})
+
 test('anonymous id persists across AnalyticsService instances', async () => {
   const systemDir = createTempSystemDir()
   const originalFetch = globalThis.fetch
diff --git a/packages/node-runtime/src/services/analytics.ts b/packages/node-runtime/src/services/analytics.ts
index fe7314f1..68baf6ff 100644
--- a/packages/node-runtime/src/services/analytics.ts
+++ b/packages/node-runtime/src/services/analytics.ts
@@ -52,6 +52,8 @@ const EVENT_NAMES = new Set<AnalyticsEventName>([
   'chat_import_failed',
   'incremental_import_used',
   'feature_used',
+  'insight_viewed',
+  'insight_tab_used',
   'ai_setup_completed',
   'ai_request_started',
   'ai_request_completed',
@@ -79,6 +81,19 @@ const FAILURE_REASONS = new Set([
   'unknown',
 ])
 
+const INSIGHT_TABS = {
+  group: new Set(['overview', 'type-analysis', 'time-analysis', 'topic', 'relationship']),
+  private: new Set([
+    'overview',
+    'type-analysis',
+    'time-analysis',
+    'topic',
+    'relationship',
+    'journey',
+    'language-preference',
+  ]),
+}
+
 const APP_LOCALES = new Set(['zh-CN', 'zh-TW', 'en-US', 'ja-JP'])
 
 function getUmamiConfigFromEnv(): AnalyticsServiceOptions['umami'] | undefined {
@@ -135,6 +150,15 @@ function normalizeEvent(eventName: string, props: Record<string, unknown> = {}):
     properties.feature_id = props.feature_id
   }
 
+  if (name === 'insight_viewed' || name === 'insight_tab_used') {
+    if (props.chat_type !== 'group' && props.chat_type !== 'private') return null
+    properties.chat_type = props.chat_type
+    if (name === 'insight_tab_used') {
+      if (typeof props.tab_id !== 'string' || !INSIGHT_TABS[props.chat_type].has(props.tab_id)) return null
+      properties.tab_id = props.tab_id
+    }
+  }
+
   if (name === 'ai_request_completed') {
     if (typeof props.success !== 'boolean') return null
     properties.success = props.success
@@ -149,6 +173,8 @@ function normalizeEvent(eventName: string, props: Record<string, unknown> = {}):
 }
 
 function eventPath(event: NormalizedEvent): string {
+  if (event.name === 'insight_viewed') return `/insights/${event.properties.chat_type}`
+  if (event.name === 'insight_tab_used') return `/insights/${event.properties.chat_type}/${event.properties.tab_id}`
   if (event.name === 'incremental_import_used') return '/import/incremental'
   if (event.name.startsWith('chat_import_')) return '/import'
   if (event.name.startsWith('ai_')) return '/ai'
diff --git a/packages/shared-types/index.ts b/packages/shared-types/index.ts
index 278e4741..c6a6118c 100644
--- a/packages/shared-types/index.ts
+++ b/packages/shared-types/index.ts
@@ -1440,6 +1440,8 @@ export type AnalyticsEventName =
   | 'chat_import_failed'
   | 'incremental_import_used'
   | 'feature_used'
+  | 'insight_viewed'
+  | 'insight_tab_used'
   | 'ai_setup_completed'
   | 'ai_request_started'
   | 'ai_request_completed'
diff --git a/src/components/navigation/NavigationTabsBase.vue b/src/components/navigation/NavigationTabsBase.vue
index d597a517..4dbaef41 100644
--- a/src/components/navigation/NavigationTabsBase.vue
+++ b/src/components/navigation/NavigationTabsBase.vue
@@ -17,6 +17,7 @@ interface Props {
 interface Emits {
   (e: 'update:modelValue', value: string): void
   (e: 'change', value: string): void
+  (e: 'select', value: string): void
 }
 
 const props = withDefaults(defineProps<Props>(), {
@@ -40,6 +41,13 @@ const activeTab = computed({
   },
 })
 
+function selectTab(value: string) {
+  const changed = value !== activeTab.value
+  activeTab.value = value
+  // Restore/model changes are not user selections; reselecting the active tab is not a visit.
+  if (changed) emit('select', value)
+}
+
 function updateIndicator() {
   const activeButton = tabRefs.value[activeTab.value]
   if (!activeButton || !containerRef.value) return
@@ -128,7 +136,7 @@ watch(
             ? 'text-primary-600 dark:text-primary-400'
             : 'text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-300',
         ]"
-        @click="activeTab = tab.id"
+        @click="selectTab(tab.id)"
       >
         <UiIcon v-if="tab.icon" :name="tab.icon" :size="size === 'sm' ? 'sm' : 'md'" />
         {{ tab.label }}
diff --git a/src/components/navigation/SectionTabs.vue b/src/components/navigation/SectionTabs.vue
index b2195f04..d2183aed 100644
--- a/src/components/navigation/SectionTabs.vue
+++ b/src/components/navigation/SectionTabs.vue
@@ -10,6 +10,7 @@ defineProps<{
 const model = defineModel<string>({ required: true })
 const emit = defineEmits<{
   change: [value: string]
+  select: [value: string]
 }>()
 </script>
 
@@ -22,6 +23,7 @@ const emit = defineEmits<{
     size="sm"
     :bordered="false"
     @change="emit('change', $event)"
+    @select="emit('select', $event)"
   >
     <template v-if="$slots.right" #right>
       <slot name="right" />
diff --git a/src/composables/useInsightTabAnalytics.test.ts b/src/composables/useInsightTabAnalytics.test.ts
new file mode 100644
index 00000000..77c31835
--- /dev/null
+++ b/src/composables/useInsightTabAnalytics.test.ts
@@ -0,0 +1,91 @@
+import assert from 'node:assert/strict'
+import test from 'node:test'
+import { effectScope, ref } from 'vue'
+
+test('only uninterrupted foreground selections count; initial views and cancellations do not', async (t) => {
+  const events: Array<{ name: string; props: Record<string, unknown> }> = []
+  await t.mock.module('@/services/product-analytics', {
+    namedExports: { trackProductEvent: (name: string, props: Record<string, unknown>) => events.push({ name, props }) },
+  })
+  const { useInsightTabAnalytics } = await import('./useInsightTabAnalytics')
+  const browserWindow = new EventTarget()
+  const browserDocument = Object.assign(new EventTarget(), { visibilityState: 'visible', hasFocus: () => true })
+  const originalWindow = Object.getOwnPropertyDescriptor(globalThis, 'window')
+  const originalDocument = Object.getOwnPropertyDescriptor(globalThis, 'document')
+  Object.defineProperty(globalThis, 'window', { configurable: true, value: browserWindow })
+  Object.defineProperty(globalThis, 'document', { configurable: true, value: browserDocument })
+  const scope = effectScope()
+  t.after(() => {
+    scope.stop()
+    for (const [key, descriptor] of [
+      ['window', originalWindow],
+      ['document', originalDocument],
+    ] as const) {
+      if (descriptor) Object.defineProperty(globalThis, key, descriptor)
+      else Reflect.deleteProperty(globalThis, key)
+    }
+  })
+  t.mock.timers.enable({ apis: ['setTimeout'] })
+  const active = ref(true)
+  const sessionId = ref<string | null>('local-only-session')
+  const routePath = ref('/private-chat/local-only-session')
+  const select = scope.run(() =>
+    useInsightTabAnalytics({
+      chatType: 'private',
+      isActive: () => active.value,
+      sessionId,
+      routePath: () => routePath.value,
+    })
+  )!
+  const visits = () => events.filter(({ name }) => name === 'insight_tab_used')
+
+  t.mock.timers.tick(5000)
+  assert.deepEqual(events, [{ name: 'insight_viewed', props: { chat_type: 'private' } }])
+  select('topic')
+  t.mock.timers.tick(2000)
+  select('relationship')
+  t.mock.timers.tick(2999)
+  assert.equal(visits().length, 0)
+  t.mock.timers.tick(1)
+  assert.deepEqual(visits(), [{ name: 'insight_tab_used', props: { chat_type: 'private', tab_id: 'relationship' } }])
+  assert.equal(events.filter(({ name }) => name === 'insight_viewed').length, 2)
+  t.mock.timers.tick(5000)
+  assert.equal(visits().length, 1)
+
+  const interruptions = [
+    () => {
+      active.value = false
+    },
+    () => {
+      sessionId.value = 'another-local-session'
+    },
+    () => {
+      browserWindow.dispatchEvent(new Event('blur'))
+    },
+    () => {
+      browserDocument.visibilityState = 'hidden'
+      browserDocument.dispatchEvent(new Event('visibilitychange'))
+    },
+    () => {
+      routePath.value = '/home'
+    },
+  ]
+  for (const interrupt of interruptions) {
+    select('time-analysis')
+    t.mock.timers.tick(2999)
+    interrupt()
+    active.value = true
+    browserDocument.visibilityState = 'visible'
+    t.mock.timers.tick(5000)
+    assert.equal(visits().length, 1)
+  }
+  // A later deliberate visit qualifies again, including a return to overview.
+  select('overview')
+  t.mock.timers.tick(3000)
+  assert.equal(visits().length, 2)
+  select('topic')
+  scope.stop()
+  t.mock.timers.tick(3000)
+  assert.equal(visits().length, 2)
+  assert.ok(events.every(({ props }) => !('session_id' in props)))
+})
diff --git a/src/composables/useInsightTabAnalytics.ts b/src/composables/useInsightTabAnalytics.ts
new file mode 100644
index 00000000..4543897f
--- /dev/null
+++ b/src/composables/useInsightTabAnalytics.ts
@@ -0,0 +1,57 @@
+import { onScopeDispose, watch, type Ref } from 'vue'
+import { trackProductEvent } from '@/services/product-analytics'
+
+/** Counts deliberate tab visits, not default/restored selection or time in the background. */
+export function useInsightTabAnalytics(options: {
+  chatType: 'group' | 'private'
+  isActive: () => boolean
+  sessionId: Ref<string | null>
+  routePath: () => string
+}) {
+  let timer: ReturnType<typeof setTimeout> | undefined
+
+  function cancel() {
+    clearTimeout(timer)
+    timer = undefined
+  }
+
+  const isForeground = () => document.visibilityState === 'visible' && document.hasFocus()
+
+  function selectTab(tabId: string) {
+    cancel()
+    if (!options.isActive() || !isForeground()) return
+    timer = setTimeout(() => {
+      timer = undefined
+      if (options.isActive() && isForeground()) {
+        // A window may stay open across days; qualify this period's denominator as well.
+        trackProductEvent('insight_viewed', { chat_type: options.chatType })
+        trackProductEvent('insight_tab_used', { chat_type: options.chatType, tab_id: tabId })
+      }
+    }, 3000)
+  }
+
+  watch(
+    [options.isActive, options.sessionId],
+    ([active, sessionId]) => {
+      cancel()
+      // Separate denominator: old clients without sub-tab tracking must not dilute its adoption rate.
+      if (active && sessionId) trackProductEvent('insight_viewed', { chat_type: options.chatType })
+    },
+    { immediate: true, flush: 'sync' }
+  )
+
+  function onVisibilityChange() {
+    if (document.visibilityState !== 'visible') cancel()
+  }
+  window.addEventListener('blur', cancel)
+  // Cancel as soon as navigation commits, before an outgoing page transition finishes.
+  watch(options.routePath, cancel, { flush: 'sync' })
+  document.addEventListener('visibilitychange', onVisibilityChange)
+  onScopeDispose(() => {
+    cancel()
+    window.removeEventListener('blur', cancel)
+    document.removeEventListener('visibilitychange', onVisibilityChange)
+  })
+
+  return selectTab
+}
diff --git a/src/pages/group-chat/components/insights/GroupChatInsights.vue b/src/pages/group-chat/components/insights/GroupChatInsights.vue
index 83f2c819..67c104fc 100644
--- a/src/pages/group-chat/components/insights/GroupChatInsights.vue
+++ b/src/pages/group-chat/components/insights/GroupChatInsights.vue
@@ -42,6 +42,7 @@ const subTabs = computed(() => {
 })
 
 const activeSubTab = ref('overview')
+const emit = defineEmits<{ selectTab: [value: string] }>()
 
 const selectedMemberId = ref<number | null>(null)
 
@@ -53,7 +54,12 @@ const viewTimeFilter = computed(() => ({
 
 <template>
   <div class="flex h-full flex-col">
-    <SectionTabs v-model="activeSubTab" :items="subTabs" persist-key="groupInsightsTab">
+    <SectionTabs
+      v-model="activeSubTab"
+      :items="subTabs"
+      persist-key="groupInsightsTab"
+      @select="emit('selectTab', $event)"
+    >
       <template #right>
         <UserSelect
           v-if="activeSubTab === 'type-analysis' || activeSubTab === 'time-analysis'"
diff --git a/src/pages/group-chat/index.vue b/src/pages/group-chat/index.vue
index 211c8f18..ca8b25fd 100644
--- a/src/pages/group-chat/index.vue
+++ b/src/pages/group-chat/index.vue
@@ -21,6 +21,7 @@ import { useSessionStore } from '@/stores/session'
 import { useLayoutStore } from '@/stores/layout'
 import { useSettingsStore } from '@/stores/settings'
 import { useSessionAnalysisPageBase } from '@/composables'
+import { useInsightTabAnalytics } from '@/composables/useInsightTabAnalytics'
 
 const { t } = useI18n()
 
@@ -88,6 +89,13 @@ const {
 
 provide('session-switch-loading', isSessionSwitching)
 
+const trackInsightTab = useInsightTabAnalytics({
+  chatType: 'group',
+  isActive: () => activeTab.value === 'insights' && !isSessionSwitching.value,
+  sessionId: currentSessionId,
+  routePath: () => route.path,
+})
+
 // 当前筛选后的消息总数
 const filteredMessageCount = computed(() => {
   return memberActivity.value.reduce((sum, m) => sum + m.messageCount, 0)
@@ -153,6 +161,7 @@ const filteredMemberCount = computed(() => {
               :filtered-message-count="filteredMessageCount"
               :filtered-member-count="filteredMemberCount"
               :time-filter="timeFilter"
+              @select-tab="trackInsightTab"
             />
             <RankingView
               v-else-if="activeTab === 'ranking'"
diff --git a/src/pages/private-chat/components/insights/PrivateChatInsights.vue b/src/pages/private-chat/components/insights/PrivateChatInsights.vue
index e7a1be4d..30202e73 100644
--- a/src/pages/private-chat/components/insights/PrivateChatInsights.vue
+++ b/src/pages/private-chat/components/insights/PrivateChatInsights.vue
@@ -44,6 +44,7 @@ const subTabs = computed(() => [
 ])
 
 const activeSubTab = ref('overview')
+const emit = defineEmits<{ selectTab: [value: string] }>()
 
 // 成员筛选（用于类型/时间分析）
 const selectedMemberId = ref<number | null>(null)
@@ -56,7 +57,12 @@ const viewTimeFilter = computed(() => ({
 
 <template>
   <div class="flex h-full flex-col">
-    <SectionTabs v-model="activeSubTab" :items="subTabs" persist-key="privateInsightsTab">
+    <SectionTabs
+      v-model="activeSubTab"
+      :items="subTabs"
+      persist-key="privateInsightsTab"
+      @select="emit('selectTab', $event)"
+    >
       <template #right>
         <UserSelect
           v-if="activeSubTab === 'type-analysis' || activeSubTab === 'time-analysis'"
diff --git a/src/pages/private-chat/index.vue b/src/pages/private-chat/index.vue
index cabe2e07..dbd39094 100644
--- a/src/pages/private-chat/index.vue
+++ b/src/pages/private-chat/index.vue
@@ -19,6 +19,7 @@ import { useSessionStore } from '@/stores/session'
 import { useLayoutStore } from '@/stores/layout'
 import { useSettingsStore } from '@/stores/settings'
 import { useSessionAnalysisPageBase } from '@/composables'
+import { useInsightTabAnalytics } from '@/composables/useInsightTabAnalytics'
 
 const { t } = useI18n()
 
@@ -83,6 +84,13 @@ const {
 
 provide('session-switch-loading', isSessionSwitching)
 
+const trackInsightTab = useInsightTabAnalytics({
+  chatType: 'private',
+  isActive: () => activeTab.value === 'insights' && !isSessionSwitching.value,
+  sessionId: currentSessionId,
+  routePath: () => route.path,
+})
+
 // 当前筛选后的消息总数
 const filteredMessageCount = computed(() => {
   return memberActivity.value.reduce((sum, m) => sum + m.messageCount, 0)
@@ -173,6 +181,7 @@ const otherMemberAvatar = computed(() => {
               :filtered-message-count="filteredMessageCount"
               :filtered-member-count="filteredMemberCount"
               :time-filter="timeFilter"
+              @select-tab="trackInsightTab"
             />
             <ChatExplorer
               v-else-if="activeTab === 'ai-chat'"