diff --git a/src/components/common/SettingModal.vue b/src/components/common/SettingModal.vue
index 16993ce8..bbbc8738 100644
--- a/src/components/common/SettingModal.vue
+++ b/src/components/common/SettingModal.vue
@@ -95,7 +95,7 @@ watch(
           </div>
 
           <!-- 存储管理 -->
-          <div v-show="activeTab === 'storage'">
+          <div v-show="activeTab === 'storage'" class="h-full">
             <StorageTab ref="storageTabRef" />
           </div>
 
diff --git a/src/components/common/settings/AISettingsTab.vue b/src/components/common/settings/AISettingsTab.vue
index 80336f78..fd76692b 100644
--- a/src/components/common/settings/AISettingsTab.vue
+++ b/src/components/common/settings/AISettingsTab.vue
@@ -1,10 +1,11 @@
 <script setup lang="ts">
-import { ref, computed, onMounted, onUnmounted } from 'vue'
+import { ref, computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 import AIModelConfigTab from './AI/AIModelConfigTab.vue'
 import AIPromptConfigTab from './AI/AIPromptConfigTab.vue'
 import AIPromptPresetTab from './AI/AIPromptPresetTab.vue'
 import SubTabs from '@/components/UI/SubTabs.vue'
+import { useSubTabsScroll } from '@/composables/useSubTabsScroll'
 
 const { t } = useI18n()
 
@@ -20,86 +21,18 @@ const navItems = computed(() => [
   { id: 'preset', label: t('settings.tabs.aiPreset') },
 ])
 
-// 当前激活的导航项
-const activeNav = ref('model')
-
-// 是否由用户点击触发（用于区分点击滚动和手动滚动）
-const isUserClick = ref(false)
-
-// 滚动容器引用
-const scrollContainerRef = ref<HTMLElement | null>(null)
-
-// Section 引用
-const sectionRefs = ref<Record<string, HTMLElement | null>>({
-  model: null,
-  chat: null,
-  preset: null,
-})
+// 使用二级导航滚动联动 composable
+const { activeNav, scrollContainerRef, setSectionRef, handleNavChange } = useSubTabsScroll(navItems)
+void scrollContainerRef // 在模板中通过 ref="scrollContainerRef" 使用
 
 // AI 配置变更回调
 function handleAIConfigChanged() {
   emit('config-changed')
 }
 
-// 处理导航点击（通过 @change 事件）
-function handleNavChange(id: string) {
-  const section = sectionRefs.value[id]
-  if (section && scrollContainerRef.value) {
-    // 标记为用户点击触发
-    isUserClick.value = true
-    section.scrollIntoView({ behavior: 'smooth', block: 'start' })
-    // 滚动动画结束后恢复
-    setTimeout(() => {
-      isUserClick.value = false
-    }, 500)
-  }
-}
-
-// 监听滚动更新当前激活项
-function handleScroll() {
-  // 如果是用户点击触发的滚动，不更新 activeNav（避免冲突）
-  if (isUserClick.value || !scrollContainerRef.value) return
-
-  const container = scrollContainerRef.value
-  const containerRect = container.getBoundingClientRect()
-  const offset = 50 // 偏移量，提前触发
-
-  // 检查是否滚动到底部（误差范围 5px）
-  const isAtBottom = container.scrollHeight - container.scrollTop - container.clientHeight < 5
-  if (isAtBottom) {
-    // 滚动到底部时，激活最后一个导航项
-    const lastItem = navItems.value[navItems.value.length - 1]
-    if (lastItem) {
-      activeNav.value = lastItem.id
-    }
-    return
-  }
-
-  // 检查每个 section 的位置
-  for (const item of navItems.value) {
-    const section = sectionRefs.value[item.id]
-    if (section) {
-      const rect = section.getBoundingClientRect()
-      // 如果 section 顶部在容器可视区域内
-      if (rect.top <= containerRect.top + offset && rect.bottom > containerRect.top + offset) {
-        activeNav.value = item.id
-        break
-      }
-    }
-  }
-}
-
 // Template refs
 const aiModelConfigRef = ref<InstanceType<typeof AIModelConfigTab> | null>(null)
 void aiModelConfigRef
-
-onMounted(() => {
-  scrollContainerRef.value?.addEventListener('scroll', handleScroll)
-})
-
-onUnmounted(() => {
-  scrollContainerRef.value?.removeEventListener('scroll', handleScroll)
-})
 </script>
 
 <template>
@@ -113,7 +46,7 @@ onUnmounted(() => {
     <div ref="scrollContainerRef" class="min-w-0 flex-1 overflow-y-auto">
       <div class="space-y-8">
         <!-- 模型配置 -->
-        <div :ref="(el) => (sectionRefs.model = el as HTMLElement)">
+        <div :ref="(el) => setSectionRef('model', el as HTMLElement)">
           <AIModelConfigTab ref="aiModelConfigRef" @config-changed="handleAIConfigChanged" />
         </div>
 
@@ -121,7 +54,7 @@ onUnmounted(() => {
         <div class="border-t border-gray-200 dark:border-gray-700" />
 
         <!-- 对话配置 -->
-        <div :ref="(el) => (sectionRefs.chat = el as HTMLElement)">
+        <div :ref="(el) => setSectionRef('chat', el as HTMLElement)">
           <AIPromptConfigTab @config-changed="handleAIConfigChanged" />
         </div>
 
@@ -129,7 +62,7 @@ onUnmounted(() => {
         <div class="border-t border-gray-200 dark:border-gray-700" />
 
         <!-- 提示词配置 -->
-        <div :ref="(el) => (sectionRefs.preset = el as HTMLElement)">
+        <div :ref="(el) => setSectionRef('preset', el as HTMLElement)">
           <AIPromptPresetTab @config-changed="handleAIConfigChanged" />
         </div>
       </div>
diff --git a/src/components/common/settings/DataStorage/SessionIndexSection.vue b/src/components/common/settings/DataStorage/SessionIndexSection.vue
new file mode 100644
index 00000000..c636cbf1
--- /dev/null
+++ b/src/components/common/settings/DataStorage/SessionIndexSection.vue
@@ -0,0 +1,290 @@
+<script setup lang="ts">
+/**
+ * 会话索引管理区块
+ * 配置会话索引阈值和批量生成功能
+ */
+import { ref, onMounted, computed } from 'vue'
+import { useI18n } from 'vue-i18n'
+
+const { t } = useI18n()
+
+// 会话索引状态
+interface SessionIndexStatus {
+  id: string
+  name: string
+  hasIndex: boolean
+  sessionCount: number
+}
+
+// 会话索引配置
+const DEFAULT_GAP_MINUTES = 30 // 默认30分钟
+const sessionGapMinutes = ref(DEFAULT_GAP_MINUTES)
+
+// 批量生成相关状态
+const allSessionsStatus = ref<SessionIndexStatus[]>([])
+const isLoadingSessionStatus = ref(false)
+const isBatchGenerating = ref(false)
+const batchProgress = ref({ current: 0, total: 0, currentName: '' })
+
+// 计算统计信息
+const sessionIndexStats = computed(() => {
+  const total = allSessionsStatus.value.length
+  const generated = allSessionsStatus.value.filter((s) => s.hasIndex).length
+  const notGenerated = total - generated
+  return { total, generated, notGenerated }
+})
+
+// 进度百分比
+const batchProgressPercent = computed(() => {
+  if (batchProgress.value.total === 0) return 0
+  return Math.round((batchProgress.value.current / batchProgress.value.total) * 100)
+})
+
+// 保存会话阈值（这里只是保存到本地存储，实际每个 session 的阈值在生成时传入）
+function saveSessionThreshold() {
+  if (sessionGapMinutes.value < 1) sessionGapMinutes.value = 1
+  if (sessionGapMinutes.value > 1440) sessionGapMinutes.value = 1440
+  // 保存到 localStorage 作为全局默认值
+  localStorage.setItem('sessionGapThreshold', String(sessionGapMinutes.value * 60))
+}
+
+// 加载会话阈值
+function loadSessionThreshold() {
+  const saved = localStorage.getItem('sessionGapThreshold')
+  if (saved) {
+    sessionGapMinutes.value = Math.round(parseInt(saved, 10) / 60)
+  }
+}
+
+// 加载所有会话的索引状态
+async function loadSessionIndexStatus() {
+  isLoadingSessionStatus.value = true
+  try {
+    // 获取所有会话
+    const sessions = await window.chatApi.getSessions()
+
+    // 获取每个会话的索引状态
+    const statusList: SessionIndexStatus[] = []
+    for (const session of sessions) {
+      try {
+        const stats = await window.sessionApi.getStats(session.id)
+        statusList.push({
+          id: session.id,
+          name: session.name,
+          hasIndex: stats.hasIndex,
+          sessionCount: stats.sessionCount,
+        })
+      } catch {
+        statusList.push({
+          id: session.id,
+          name: session.name,
+          hasIndex: false,
+          sessionCount: 0,
+        })
+      }
+    }
+
+    allSessionsStatus.value = statusList
+  } catch (error) {
+    console.error('加载会话索引状态失败:', error)
+  } finally {
+    isLoadingSessionStatus.value = false
+  }
+}
+
+// 批量生成所有未生成索引的会话
+async function batchGenerateIndex() {
+  const notGeneratedSessions = allSessionsStatus.value.filter((s) => !s.hasIndex)
+  if (notGeneratedSessions.length === 0) return
+
+  isBatchGenerating.value = true
+  batchProgress.value = { current: 0, total: notGeneratedSessions.length, currentName: '' }
+
+  // 获取阈值
+  const gapThreshold = sessionGapMinutes.value * 60
+
+  for (let i = 0; i < notGeneratedSessions.length; i++) {
+    const session = notGeneratedSessions[i]
+    batchProgress.value = {
+      current: i,
+      total: notGeneratedSessions.length,
+      currentName: session.name,
+    }
+
+    try {
+      const count = await window.sessionApi.generate(session.id, gapThreshold)
+      // 更新状态
+      const statusItem = allSessionsStatus.value.find((s) => s.id === session.id)
+      if (statusItem) {
+        statusItem.hasIndex = true
+        statusItem.sessionCount = count
+      }
+    } catch (error) {
+      console.error(`生成会话 ${session.name} 索引失败:`, error)
+    }
+  }
+
+  batchProgress.value = {
+    current: notGeneratedSessions.length,
+    total: notGeneratedSessions.length,
+    currentName: '',
+  }
+  isBatchGenerating.value = false
+}
+
+// 批量重新生成所有会话的索引
+async function batchRegenerateAll() {
+  if (allSessionsStatus.value.length === 0) return
+
+  isBatchGenerating.value = true
+  batchProgress.value = { current: 0, total: allSessionsStatus.value.length, currentName: '' }
+
+  // 获取阈值
+  const gapThreshold = sessionGapMinutes.value * 60
+
+  for (let i = 0; i < allSessionsStatus.value.length; i++) {
+    const session = allSessionsStatus.value[i]
+    batchProgress.value = {
+      current: i,
+      total: allSessionsStatus.value.length,
+      currentName: session.name,
+    }
+
+    try {
+      const count = await window.sessionApi.generate(session.id, gapThreshold)
+      // 更新状态
+      session.hasIndex = true
+      session.sessionCount = count
+    } catch (error) {
+      console.error(`生成会话 ${session.name} 索引失败:`, error)
+    }
+  }
+
+  batchProgress.value = {
+    current: allSessionsStatus.value.length,
+    total: allSessionsStatus.value.length,
+    currentName: '',
+  }
+  isBatchGenerating.value = false
+}
+
+// 组件挂载时加载数据
+onMounted(() => {
+  loadSessionThreshold()
+  loadSessionIndexStatus()
+})
+</script>
+
+<template>
+  <div class="space-y-6">
+    <!-- 会话索引配置 -->
+    <div class="space-y-3">
+      <div class="flex items-center justify-between">
+        <div>
+          <h3 class="flex items-center gap-2 text-sm font-semibold text-gray-900 dark:text-white">
+            <UIcon name="i-heroicons-clock" class="h-4 w-4 text-blue-500" />
+            {{ t('settings.storage.session.title') }}
+          </h3>
+          <p class="mt-0.5 text-xs text-gray-500 dark:text-gray-400">
+            {{ t('settings.storage.session.description') }}
+          </p>
+        </div>
+        <!-- 刷新按钮 -->
+        <UButton
+          icon="i-heroicons-arrow-path"
+          variant="ghost"
+          size="xs"
+          :loading="isLoadingSessionStatus"
+          @click="loadSessionIndexStatus"
+        />
+      </div>
+
+      <!-- 默认阈值设置 -->
+      <div class="flex items-center justify-between rounded-lg border border-gray-200 bg-gray-50 px-4 py-3 dark:border-gray-700 dark:bg-gray-800/50">
+        <div>
+          <span class="text-sm text-gray-700 dark:text-gray-300">
+            {{ t('settings.storage.session.defaultThreshold') }}
+          </span>
+          <p class="text-xs text-gray-400">
+            {{ t('settings.storage.session.thresholdHelp') }}
+          </p>
+        </div>
+        <div class="flex items-center gap-2">
+          <UInput
+            v-model.number="sessionGapMinutes"
+            type="number"
+            :min="1"
+            :max="1440"
+            size="xs"
+            class="w-20"
+            @blur="saveSessionThreshold"
+          />
+          <span class="text-xs text-gray-500">{{ t('settings.storage.session.thresholdUnit') }}</span>
+        </div>
+      </div>
+
+      <!-- 会话索引统计 -->
+      <div class="rounded-lg border border-gray-200 bg-gray-50 px-4 py-3 dark:border-gray-700 dark:bg-gray-800/50">
+        <div class="flex items-center justify-between">
+          <div>
+            <span class="text-sm text-gray-700 dark:text-gray-300">
+              {{ t('settings.storage.session.batchTitle') }}
+            </span>
+            <div v-if="!isLoadingSessionStatus" class="mt-1 flex items-center gap-3 text-xs">
+              <span class="text-gray-500">
+                {{ t('settings.storage.session.totalSessions', { count: sessionIndexStats.total }) }}
+              </span>
+              <span class="text-green-600 dark:text-green-400">
+                {{ t('settings.storage.session.generatedCount', { count: sessionIndexStats.generated }) }}
+              </span>
+              <span v-if="sessionIndexStats.notGenerated > 0" class="text-amber-600 dark:text-amber-400">
+                {{ t('settings.storage.session.notGeneratedCount', { count: sessionIndexStats.notGenerated }) }}
+              </span>
+            </div>
+            <div v-else class="mt-1 flex items-center gap-1 text-xs text-gray-400">
+              <UIcon name="i-heroicons-arrow-path" class="h-3 w-3 animate-spin" />
+              {{ t('settings.storage.session.loadingStatus') }}
+            </div>
+          </div>
+          <div class="flex items-center gap-2">
+            <UButton
+              v-if="sessionIndexStats.notGenerated > 0"
+              size="xs"
+              color="primary"
+              :loading="isBatchGenerating"
+              :disabled="isLoadingSessionStatus"
+              @click="batchGenerateIndex"
+            >
+              <UIcon v-if="!isBatchGenerating" name="i-heroicons-sparkles" class="mr-1 h-3 w-3" />
+              {{ t('settings.storage.session.batchGenerate') }}
+            </UButton>
+            <UButton
+              size="xs"
+              variant="soft"
+              :loading="isBatchGenerating"
+              :disabled="isLoadingSessionStatus || sessionIndexStats.total === 0"
+              @click="batchRegenerateAll"
+            >
+              <UIcon v-if="!isBatchGenerating" name="i-heroicons-arrow-path" class="mr-1 h-3 w-3" />
+              {{ t('settings.storage.session.batchRegenerate') }}
+            </UButton>
+          </div>
+        </div>
+
+        <!-- 批量生成进度 -->
+        <div v-if="isBatchGenerating" class="mt-3 space-y-2">
+          <div class="flex items-center justify-between text-xs">
+            <span class="text-gray-500">
+              {{ t('settings.storage.session.generating') }} {{ batchProgress.currentName }}
+            </span>
+            <span class="font-medium text-gray-700 dark:text-gray-300">
+              {{ batchProgress.current }}/{{ batchProgress.total }} ({{ batchProgressPercent }}%)
+            </span>
+          </div>
+          <UProgress :value="batchProgressPercent" size="sm" />
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
diff --git a/src/components/common/settings/DataStorage/StorageManageSection.vue b/src/components/common/settings/DataStorage/StorageManageSection.vue
new file mode 100644
index 00000000..b4e6cdfd
--- /dev/null
+++ b/src/components/common/settings/DataStorage/StorageManageSection.vue
@@ -0,0 +1,214 @@
+<script setup lang="ts">
+/**
+ * 存储管理区块
+ * 显示本地缓存目录信息及清理功能
+ */
+import { ref, onMounted, computed } from 'vue'
+import { useI18n } from 'vue-i18n'
+
+const { t } = useI18n()
+
+// 缓存目录信息类型
+interface CacheDirectoryInfo {
+  id: string
+  name: string
+  description: string
+  path: string
+  icon: string
+  canClear: boolean
+  size: number
+  fileCount: number
+  exists: boolean
+}
+
+interface CacheInfo {
+  baseDir: string
+  directories: CacheDirectoryInfo[]
+  totalSize: number
+}
+
+// 状态
+const cacheInfo = ref<CacheInfo | null>(null)
+const isLoading = ref(false)
+const clearingId = ref<string | null>(null)
+
+// 格式化文件大小
+function formatSize(bytes: number): string {
+  if (bytes === 0) return '0 B'
+  const units = ['B', 'KB', 'MB', 'GB']
+  const i = Math.floor(Math.log(bytes) / Math.log(1024))
+  const size = (bytes / Math.pow(1024, i)).toFixed(i > 0 ? 1 : 0)
+  return `${size} ${units[i]}`
+}
+
+// 计算总大小
+const totalSizeFormatted = computed(() => {
+  if (!cacheInfo.value) return '0 B'
+  return formatSize(cacheInfo.value.totalSize)
+})
+
+// 加载缓存信息
+async function loadCacheInfo() {
+  isLoading.value = true
+  try {
+    cacheInfo.value = await window.cacheApi.getInfo()
+  } catch (error) {
+    console.error('获取缓存信息失败:', error)
+  } finally {
+    isLoading.value = false
+  }
+}
+
+// 清理缓存
+async function clearCache(cacheId: string) {
+  clearingId.value = cacheId
+  try {
+    const result = await window.cacheApi.clear(cacheId)
+    if (result.success) {
+      // 刷新缓存信息
+      await loadCacheInfo()
+    } else {
+      console.error('清理缓存失败:', result.error)
+    }
+  } catch (error) {
+    console.error('清理缓存失败:', error)
+  } finally {
+    clearingId.value = null
+  }
+}
+
+// 打开目录
+async function openDirectory(cacheId: string) {
+  try {
+    await window.cacheApi.openDir(cacheId)
+  } catch (error) {
+    console.error('打开目录失败:', error)
+  }
+}
+
+// 组件挂载时加载数据
+onMounted(() => {
+  loadCacheInfo()
+})
+
+// 暴露刷新方法
+defineExpose({
+  refresh: loadCacheInfo,
+})
+</script>
+
+<template>
+  <div class="space-y-6">
+    <!-- 标题和总览 -->
+    <div class="flex items-center justify-between">
+      <div>
+        <h3 class="flex items-center gap-2 text-sm font-semibold text-gray-900 dark:text-white">
+          <UIcon name="i-heroicons-folder-open" class="h-4 w-4 text-amber-500" />
+          {{ t('settings.storage.title') }}
+        </h3>
+        <p class="mt-1 text-xs text-gray-500 dark:text-gray-400">{{ t('settings.storage.description') }}</p>
+      </div>
+      <div class="flex items-center gap-2">
+        <!-- 总大小 -->
+        <div class="rounded-lg bg-gray-100 px-3 py-1.5 dark:bg-gray-800">
+          <span class="text-xs text-gray-500 dark:text-gray-400">{{ t('settings.storage.totalUsage') }}</span>
+          <span class="text-sm font-semibold text-gray-900 dark:text-white">{{ totalSizeFormatted }}</span>
+        </div>
+        <!-- 刷新按钮 -->
+        <UButton icon="i-heroicons-arrow-path" variant="ghost" size="sm" :loading="isLoading" @click="loadCacheInfo" />
+      </div>
+    </div>
+
+    <!-- 加载状态 -->
+    <div v-if="isLoading && !cacheInfo" class="flex items-center justify-center py-8">
+      <UIcon name="i-heroicons-arrow-path" class="h-5 w-5 animate-spin text-gray-400" />
+      <span class="ml-2 text-sm text-gray-500">{{ t('settings.storage.loading') }}</span>
+    </div>
+
+    <!-- 缓存目录列表 -->
+    <div v-else-if="cacheInfo" class="space-y-2">
+      <div
+        v-for="dir in cacheInfo.directories"
+        :key="dir.id"
+        class="rounded-lg border border-gray-200 bg-gray-50 px-3 py-2.5 transition-colors hover:bg-gray-100 dark:border-gray-700 dark:bg-gray-800/50 dark:hover:bg-gray-800"
+      >
+        <div class="flex items-center justify-between">
+          <!-- 左侧信息 -->
+          <div class="flex items-center gap-3">
+            <div
+              class="flex h-8 w-8 shrink-0 items-center justify-center rounded-lg"
+              :class="{
+                'bg-green-100 dark:bg-green-900/30': dir.id === 'databases',
+                'bg-violet-100 dark:bg-violet-900/30': dir.id === 'ai',
+                'bg-amber-100 dark:bg-amber-900/30': dir.id === 'downloads',
+                'bg-blue-100 dark:bg-blue-900/30': dir.id === 'logs',
+              }"
+            >
+              <UIcon
+                :name="dir.icon"
+                class="h-4 w-4"
+                :class="{
+                  'text-green-600 dark:text-green-400': dir.id === 'databases',
+                  'text-violet-600 dark:text-violet-400': dir.id === 'ai',
+                  'text-amber-600 dark:text-amber-400': dir.id === 'downloads',
+                  'text-blue-600 dark:text-blue-400': dir.id === 'logs',
+                }"
+              />
+            </div>
+            <div>
+              <div class="flex items-center gap-2">
+                <h4 class="text-sm font-medium text-gray-900 dark:text-white">{{ t(dir.name) }}</h4>
+                <UBadge v-if="!dir.exists" variant="soft" color="gray" size="xs">
+                  {{ t('settings.storage.notExist') }}
+                </UBadge>
+              </div>
+              <p class="text-xs text-gray-500 dark:text-gray-400">{{ t(dir.description) }}</p>
+            </div>
+          </div>
+
+          <!-- 右侧信息和操作按钮 -->
+          <div class="flex items-center">
+            <!-- 文件数和大小（固定宽度对齐） -->
+            <div class="flex items-center gap-2 text-xs text-gray-400">
+              <span class="w-14 text-right">{{ dir.fileCount }} {{ t('settings.storage.files') }}</span>
+              <span class="w-16 text-right">{{ formatSize(dir.size) }}</span>
+            </div>
+            <!-- 操作按钮（固定宽度） -->
+            <div class="ml-4 flex w-36 shrink-0 items-center justify-end gap-1">
+              <UButton
+                v-if="dir.canClear && dir.size > 0"
+                icon="i-heroicons-trash"
+                variant="soft"
+                color="red"
+                size="xs"
+                :loading="clearingId === dir.id"
+                :disabled="clearingId !== null"
+                @click="clearCache(dir.id)"
+              >
+                {{ t('settings.storage.clear') }}
+              </UButton>
+              <UButton icon="i-heroicons-folder-open" variant="ghost" size="xs" @click="openDirectory(dir.id)">
+                {{ t('settings.storage.open') }}
+              </UButton>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <!-- 提示信息 -->
+    <div class="rounded-lg border border-amber-200 bg-amber-50 p-3 dark:border-amber-800/50 dark:bg-amber-900/20">
+      <div class="flex items-start gap-2">
+        <UIcon name="i-heroicons-exclamation-triangle" class="h-4 w-4 shrink-0 text-amber-500" />
+        <div class="text-xs text-amber-700 dark:text-amber-400">
+          <p class="font-medium">{{ t('settings.storage.notes.title') }}</p>
+          <ul class="mt-1 list-inside list-disc space-y-0.5 text-amber-600 dark:text-amber-500">
+            <li>{{ t('settings.storage.notes.logSafe') }}</li>
+            <li>{{ t('settings.storage.notes.noRecover') }}</li>
+          </ul>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
diff --git a/src/components/common/settings/StorageTab.vue b/src/components/common/settings/StorageTab.vue
index b4a69c2d..71a5ceb5 100644
--- a/src/components/common/settings/StorageTab.vue
+++ b/src/components/common/settings/StorageTab.vue
@@ -1,207 +1,57 @@
 <script setup lang="ts">
-import { ref, onMounted, computed } from 'vue'
+/**
+ * 数据和存储设置 Tab
+ * 包含存储管理和会话管理两个子 Tab
+ */
+import { ref, computed } from 'vue'
 import { useI18n } from 'vue-i18n'
+import StorageManageSection from './DataStorage/StorageManageSection.vue'
+import SessionIndexSection from './DataStorage/SessionIndexSection.vue'
+import SubTabs from '@/components/UI/SubTabs.vue'
+import { useSubTabsScroll } from '@/composables/useSubTabsScroll'
 
 const { t } = useI18n()
 
-// 缓存目录信息类型
-interface CacheDirectoryInfo {
-  id: string
-  name: string
-  description: string
-  path: string
-  icon: string
-  canClear: boolean
-  size: number
-  fileCount: number
-  exists: boolean
-}
+// 导航配置
+const navItems = computed(() => [
+  { id: 'storage', label: t('settings.tabs.storageManage') },
+  { id: 'session', label: t('settings.tabs.sessionManage') },
+])
 
-interface CacheInfo {
-  baseDir: string
-  directories: CacheDirectoryInfo[]
-  totalSize: number
-}
+// 使用二级导航滚动联动 composable
+const { activeNav, scrollContainerRef, setSectionRef, handleNavChange } = useSubTabsScroll(navItems)
+void scrollContainerRef // 在模板中通过 ref="scrollContainerRef" 使用
 
-// 状态
-const cacheInfo = ref<CacheInfo | null>(null)
-const isLoading = ref(false)
-const clearingId = ref<string | null>(null)
-
-// 格式化文件大小
-function formatSize(bytes: number): string {
-  if (bytes === 0) return '0 B'
-  const units = ['B', 'KB', 'MB', 'GB']
-  const i = Math.floor(Math.log(bytes) / Math.log(1024))
-  const size = (bytes / Math.pow(1024, i)).toFixed(i > 0 ? 1 : 0)
-  return `${size} ${units[i]}`
-}
-
-// 计算总大小
-const totalSizeFormatted = computed(() => {
-  if (!cacheInfo.value) return '0 B'
-  return formatSize(cacheInfo.value.totalSize)
-})
-
-// 加载缓存信息
-async function loadCacheInfo() {
-  isLoading.value = true
-  try {
-    cacheInfo.value = await window.cacheApi.getInfo()
-  } catch (error) {
-    console.error('获取缓存信息失败:', error)
-  } finally {
-    isLoading.value = false
-  }
-}
-
-// 清理缓存
-async function clearCache(cacheId: string) {
-  clearingId.value = cacheId
-  try {
-    const result = await window.cacheApi.clear(cacheId)
-    if (result.success) {
-      // 刷新缓存信息
-      await loadCacheInfo()
-    } else {
-      console.error('清理缓存失败:', result.error)
-    }
-  } catch (error) {
-    console.error('清理缓存失败:', error)
-  } finally {
-    clearingId.value = null
-  }
-}
-
-// 打开目录
-async function openDirectory(cacheId: string) {
-  try {
-    await window.cacheApi.openDir(cacheId)
-  } catch (error) {
-    console.error('打开目录失败:', error)
-  }
-}
-
-// 组件挂载时加载数据
-onMounted(() => {
-  loadCacheInfo()
-})
+// Template refs
+const storageManageRef = ref<InstanceType<typeof StorageManageSection> | null>(null)
 
 // 暴露刷新方法
 defineExpose({
-  refresh: loadCacheInfo,
+  refresh: () => storageManageRef.value?.refresh(),
 })
 </script>
 
 <template>
-  <div class="space-y-6">
-    <!-- 标题和总览 -->
-    <div class="flex items-center justify-between">
-      <div>
-        <h3 class="flex items-center gap-2 text-sm font-semibold text-gray-900 dark:text-white">
-          <UIcon name="i-heroicons-folder-open" class="h-4 w-4 text-amber-500" />
-          {{ t('settings.storage.title') }}
-        </h3>
-        <p class="mt-1 text-xs text-gray-500 dark:text-gray-400">{{ t('settings.storage.description') }}</p>
-      </div>
-      <div class="flex items-center gap-2">
-        <!-- 总大小 -->
-        <div class="rounded-lg bg-gray-100 px-3 py-1.5 dark:bg-gray-800">
-          <span class="text-xs text-gray-500 dark:text-gray-400">{{ t('settings.storage.totalUsage') }}</span>
-          <span class="text-sm font-semibold text-gray-900 dark:text-white">{{ totalSizeFormatted }}</span>
+  <div class="flex h-full gap-6">
+    <!-- 左侧锚点导航 -->
+    <div class="w-28 shrink-0">
+      <SubTabs v-model="activeNav" :items="navItems" orientation="vertical" @change="handleNavChange" />
+    </div>
+
+    <!-- 右侧内容区域 -->
+    <div ref="scrollContainerRef" class="min-w-0 flex-1 overflow-y-auto">
+      <div class="space-y-8">
+        <!-- 存储管理 -->
+        <div :ref="(el) => setSectionRef('storage', el as HTMLElement)">
+          <StorageManageSection ref="storageManageRef" />
         </div>
-        <!-- 刷新按钮 -->
-        <UButton icon="i-heroicons-arrow-path" variant="ghost" size="sm" :loading="isLoading" @click="loadCacheInfo" />
-      </div>
-    </div>
 
-    <!-- 加载状态 -->
-    <div v-if="isLoading && !cacheInfo" class="flex items-center justify-center py-8">
-      <UIcon name="i-heroicons-arrow-path" class="h-5 w-5 animate-spin text-gray-400" />
-      <span class="ml-2 text-sm text-gray-500">{{ t('settings.storage.loading') }}</span>
-    </div>
+        <!-- 分隔线 -->
+        <div class="border-t border-gray-200 dark:border-gray-700" />
 
-    <!-- 缓存目录列表 -->
-    <div v-else-if="cacheInfo" class="space-y-2">
-      <div
-        v-for="dir in cacheInfo.directories"
-        :key="dir.id"
-        class="rounded-lg border border-gray-200 bg-gray-50 px-3 py-2.5 transition-colors hover:bg-gray-100 dark:border-gray-700 dark:bg-gray-800/50 dark:hover:bg-gray-800"
-      >
-        <div class="flex items-center justify-between">
-          <!-- 左侧信息 -->
-          <div class="flex items-center gap-3">
-            <div
-              class="flex h-8 w-8 shrink-0 items-center justify-center rounded-lg"
-              :class="{
-                'bg-green-100 dark:bg-green-900/30': dir.id === 'databases',
-                'bg-violet-100 dark:bg-violet-900/30': dir.id === 'ai',
-                'bg-amber-100 dark:bg-amber-900/30': dir.id === 'downloads',
-                'bg-blue-100 dark:bg-blue-900/30': dir.id === 'logs',
-              }"
-            >
-              <UIcon
-                :name="dir.icon"
-                class="h-4 w-4"
-                :class="{
-                  'text-green-600 dark:text-green-400': dir.id === 'databases',
-                  'text-violet-600 dark:text-violet-400': dir.id === 'ai',
-                  'text-amber-600 dark:text-amber-400': dir.id === 'downloads',
-                  'text-blue-600 dark:text-blue-400': dir.id === 'logs',
-                }"
-              />
-            </div>
-            <div>
-              <div class="flex items-center gap-2">
-                <h4 class="text-sm font-medium text-gray-900 dark:text-white">{{ t(dir.name) }}</h4>
-                <UBadge v-if="!dir.exists" variant="soft" color="gray" size="xs">
-                  {{ t('settings.storage.notExist') }}
-                </UBadge>
-              </div>
-              <p class="text-xs text-gray-500 dark:text-gray-400">{{ t(dir.description) }}</p>
-            </div>
-          </div>
-
-          <!-- 右侧信息和操作按钮 -->
-          <div class="flex items-center">
-            <!-- 文件数和大小（固定宽度对齐） -->
-            <div class="flex items-center gap-2 text-xs text-gray-400">
-              <span class="w-14 text-right">{{ dir.fileCount }} {{ t('settings.storage.files') }}</span>
-              <span class="w-16 text-right">{{ formatSize(dir.size) }}</span>
-            </div>
-            <!-- 操作按钮（固定宽度） -->
-            <div class="ml-4 flex w-36 shrink-0 items-center justify-end gap-1">
-              <UButton
-                v-if="dir.canClear && dir.size > 0"
-                icon="i-heroicons-trash"
-                variant="soft"
-                color="red"
-                size="xs"
-                :loading="clearingId === dir.id"
-                :disabled="clearingId !== null"
-                @click="clearCache(dir.id)"
-              >
-                {{ t('settings.storage.clear') }}
-              </UButton>
-              <UButton icon="i-heroicons-folder-open" variant="ghost" size="xs" @click="openDirectory(dir.id)">
-                {{ t('settings.storage.open') }}
-              </UButton>
-            </div>
-          </div>
-        </div>
-      </div>
-    </div>
-
-    <!-- 提示信息 -->
-    <div class="rounded-lg border border-amber-200 bg-amber-50 p-3 dark:border-amber-800/50 dark:bg-amber-900/20">
-      <div class="flex items-start gap-2">
-        <UIcon name="i-heroicons-exclamation-triangle" class="h-4 w-4 shrink-0 text-amber-500" />
-        <div class="text-xs text-amber-700 dark:text-amber-400">
-          <p class="font-medium">{{ t('settings.storage.notes.title') }}</p>
-          <ul class="mt-1 list-inside list-disc space-y-0.5 text-amber-600 dark:text-amber-500">
-            <li>{{ t('settings.storage.notes.logSafe') }}</li>
-            <li>{{ t('settings.storage.notes.noRecover') }}</li>
-          </ul>
+        <!-- 会话管理 -->
+        <div :ref="(el) => setSectionRef('session', el as HTMLElement)">
+          <SessionIndexSection />
         </div>
       </div>
     </div>
diff --git a/src/composables/useSubTabsScroll.ts b/src/composables/useSubTabsScroll.ts
new file mode 100644
index 00000000..d1dbc03d
--- /dev/null
+++ b/src/composables/useSubTabsScroll.ts
@@ -0,0 +1,105 @@
+import { ref, computed, onMounted, onUnmounted, type Ref, type ComputedRef } from 'vue'
+
+/**
+ * 导航项配置
+ */
+export interface SubTabNavItem {
+  id: string
+  label: string
+  icon?: string
+}
+
+/**
+ * 二级导航滚动联动 composable
+ * 实现左侧锚点导航与右侧内容区域的滚动联动
+ */
+export function useSubTabsScroll(navItems: ComputedRef<SubTabNavItem[]> | Ref<SubTabNavItem[]>) {
+  // 当前激活的导航项
+  const activeNav = ref(navItems.value[0]?.id || '')
+
+  // 是否由用户点击触发（用于区分点击滚动和手动滚动）
+  const isUserClick = ref(false)
+
+  // 滚动容器引用
+  const scrollContainerRef = ref<HTMLElement | null>(null)
+
+  // Section 引用
+  const sectionRefs = ref<Record<string, HTMLElement | null>>({})
+
+  /**
+   * 设置 section 引用
+   */
+  function setSectionRef(id: string, el: HTMLElement | null) {
+    sectionRefs.value[id] = el
+  }
+
+  /**
+   * 处理导航点击（通过 @change 事件）
+   */
+  function handleNavChange(id: string) {
+    const section = sectionRefs.value[id]
+    if (section && scrollContainerRef.value) {
+      // 标记为用户点击触发
+      isUserClick.value = true
+      section.scrollIntoView({ behavior: 'smooth', block: 'start' })
+      // 滚动动画结束后恢复
+      setTimeout(() => {
+        isUserClick.value = false
+      }, 500)
+    }
+  }
+
+  /**
+   * 监听滚动更新当前激活项
+   */
+  function handleScroll() {
+    // 如果是用户点击触发的滚动，不更新 activeNav（避免冲突）
+    if (isUserClick.value || !scrollContainerRef.value) return
+
+    const container = scrollContainerRef.value
+    const containerRect = container.getBoundingClientRect()
+    const offset = 50 // 偏移量，提前触发
+
+    // 检查是否滚动到底部（误差范围 5px）
+    const isAtBottom = container.scrollHeight - container.scrollTop - container.clientHeight < 5
+    if (isAtBottom) {
+      // 滚动到底部时，激活最后一个导航项
+      const lastItem = navItems.value[navItems.value.length - 1]
+      if (lastItem) {
+        activeNav.value = lastItem.id
+      }
+      return
+    }
+
+    // 检查每个 section 的位置
+    for (const item of navItems.value) {
+      const section = sectionRefs.value[item.id]
+      if (section) {
+        const rect = section.getBoundingClientRect()
+        // 如果 section 顶部在容器可视区域内
+        if (rect.top <= containerRect.top + offset && rect.bottom > containerRect.top + offset) {
+          activeNav.value = item.id
+          break
+        }
+      }
+    }
+  }
+
+  // 生命周期钩子
+  onMounted(() => {
+    scrollContainerRef.value?.addEventListener('scroll', handleScroll)
+  })
+
+  onUnmounted(() => {
+    scrollContainerRef.value?.removeEventListener('scroll', handleScroll)
+  })
+
+  return {
+    activeNav,
+    scrollContainerRef,
+    sectionRefs,
+    setSectionRef,
+    handleNavChange,
+  }
+}
+
diff --git a/src/i18n/locales/en-US/settings.json b/src/i18n/locales/en-US/settings.json
index 5728add5..c50ffd7b 100644
--- a/src/i18n/locales/en-US/settings.json
+++ b/src/i18n/locales/en-US/settings.json
@@ -6,7 +6,9 @@
     "aiConfig": "AI Models",
     "aiPrompt": "Chat Config",
     "aiPreset": "Prompts",
-    "storage": "Storage",
+    "storage": "Data & Storage",
+    "storageManage": "Storage",
+    "sessionManage": "Sessions",
     "about": "About"
   },
   "basic": {
@@ -129,6 +131,29 @@
         "name": "Log Files",
         "description": "App logs including import, AI, error logs"
       }
+    },
+    "session": {
+      "title": "Session Index Settings",
+      "description": "Session index splits chat history into conversation segments by time gaps for better AI analysis",
+      "defaultThreshold": "Default Gap Threshold",
+      "thresholdUnit": "minutes",
+      "thresholdHelp": "Messages exceeding this time gap will be split into a new session",
+      "notGenerated": "Session index not generated",
+      "generateHint": "Generate index to help AI better understand conversation context",
+      "generate": "Generate Index",
+      "regenerate": "Regenerate",
+      "generating": "Generating",
+      "sessionCount": "{count} sessions",
+      "generated": "Session index generated",
+      "generateSuccess": "Session index generated successfully, {count} sessions created",
+      "generateError": "Generation failed",
+      "batchTitle": "Batch Generate Index",
+      "totalSessions": "{count} chats total",
+      "generatedCount": "{count} generated",
+      "notGeneratedCount": "{count} not generated",
+      "loadingStatus": "Loading...",
+      "batchGenerate": "Generate Missing",
+      "batchRegenerate": "Regenerate All"
     }
   },
   "aiPrompt": {
diff --git a/src/i18n/locales/zh-CN/settings.json b/src/i18n/locales/zh-CN/settings.json
index d9b0c89a..cc7e4c6d 100644
--- a/src/i18n/locales/zh-CN/settings.json
+++ b/src/i18n/locales/zh-CN/settings.json
@@ -6,7 +6,9 @@
     "aiConfig": "模型配置",
     "aiPrompt": "对话配置",
     "aiPreset": "提示词配置",
-    "storage": "存储管理",
+    "storage": "数据和存储",
+    "storageManage": "存储管理",
+    "sessionManage": "会话管理",
     "about": "关于"
   },
   "basic": {
@@ -129,6 +131,29 @@
         "name": "日志文件",
         "description": "软件的运行日志，包含导入、AI、错误等日志"
       }
+    },
+    "session": {
+      "title": "会话索引设置",
+      "description": "会话索引将聊天记录按时间间隔自动分割为对话段落，便于AI分析和浏览",
+      "defaultThreshold": "默认分割间隔",
+      "thresholdUnit": "分钟",
+      "thresholdHelp": "超过该时间间隔的消息将被分到新的会话段落",
+      "notGenerated": "尚未生成会话索引",
+      "generateHint": "生成索引后可让 AI 更精准地理解对话上下文",
+      "generate": "生成索引",
+      "regenerate": "重新生成",
+      "generating": "正在生成",
+      "sessionCount": "{count} 个会话",
+      "generated": "已生成会话索引",
+      "generateSuccess": "会话索引生成成功，共 {count} 个会话",
+      "generateError": "生成失败",
+      "batchTitle": "批量生成索引",
+      "totalSessions": "共 {count} 个聊天",
+      "generatedCount": "已生成 {count} 个",
+      "notGeneratedCount": "未生成 {count} 个",
+      "loadingStatus": "加载中...",
+      "batchGenerate": "生成未索引",
+      "batchRegenerate": "全部重新生成"
     }
   },
   "aiPrompt": {