diff --git a/src/components/analysis/ai/ChatExplorer.vue b/src/components/analysis/ai/ChatExplorer.vue
index a134423..156c97d 100644
--- a/src/components/analysis/ai/ChatExplorer.vue
+++ b/src/components/analysis/ai/ChatExplorer.vue
@@ -325,7 +325,7 @@ watch(
         </div>
 
         <!-- 输入框区域 -->
-        <div class="p-4 pt-0">
+        <div class="px-4 pb-2">
           <div class="mx-auto max-w-3xl">
             <ChatInput
               :disabled="isAIThinking"
@@ -335,7 +335,7 @@ watch(
             />
 
             <!-- 底部状态栏 -->
-            <div class="mt-2 flex items-center justify-between px-1">
+            <div class="flex items-center justify-between px-1">
               <!-- 左侧：预设选择器 -->
               <UPopover v-model:open="isPresetPopoverOpen" :ui="{ content: 'p-0' }">
                 <button
@@ -384,7 +384,7 @@ watch(
                   :class="[hasLLMConfig ? 'text-gray-400' : 'text-amber-500 font-medium']"
                 >
                   <span class="h-1.5 w-1.5 rounded-full" :class="[hasLLMConfig ? 'bg-green-500' : 'bg-amber-500']" />
-                  {{ hasLLMConfig ? '服务已连接' : '请在全局设置中配置 AI 服务' }}
+                  {{ hasLLMConfig ? 'AI 已连接' : '请在全局设置中配置 AI 服务' }}
                 </div>
               </div>
             </div>
diff --git a/src/components/analysis/ai/ChatInput.vue b/src/components/analysis/ai/ChatInput.vue
index 0f2139e..ec2ab48 100644
--- a/src/components/analysis/ai/ChatInput.vue
+++ b/src/components/analysis/ai/ChatInput.vue
@@ -40,7 +40,7 @@ function handleStop() {
 </script>
 
 <template>
-  <div class="shrink-0 border-t border-gray-200 py-4 dark:border-gray-800">
+  <div class="shrink-0 border-t border-gray-200 pt-4 pb-2 dark:border-gray-800">
     <div class="w-full">
       <UChatPrompt
         v-model="inputValue"
diff --git a/src/components/common/Sidebar.vue b/src/components/common/Sidebar.vue
index 2c8b02d..3942590 100644
--- a/src/components/common/Sidebar.vue
+++ b/src/components/common/Sidebar.vue
@@ -176,7 +176,7 @@ function isPrivateChat(session: AnalysisSession): boolean {
           variant="ghost"
           @click="router.push({ name: 'tools' })"
         >
-          <UIcon name="i-heroicons-squares-2x2" class="h-5 w-5 shrink-0" :class="[isCollapsed ? '' : 'mr-2']" />
+          <UIcon name="i-heroicons-wrench-screwdriver" class="h-4 w-4 shrink-0" :class="[isCollapsed ? '' : 'mr-2']" />
           <span v-if="!isCollapsed" class="truncate">实用工具</span>
         </UButton>
       </UTooltip>
@@ -231,9 +231,8 @@ function isPrivateChat(session: AnalysisSession): boolean {
                     isCollapsed ? '' : 'mr-3',
                   ]"
                 >
-                  <!-- 私聊显示用户图标，群聊显示首字母 -->
-                  <UIcon v-if="isPrivateChat(session)" name="i-heroicons-user" class="h-4 w-4" />
-                  <template v-else>{{ session.name ? session.name.charAt(0) : '?' }}</template>
+                  <!-- 私聊和群聊都显示名字首字母 -->
+                  {{ session.name ? session.name.charAt(0) : '?' }}
                 </div>
 
                 <!-- Session Info -->
diff --git a/src/components/layout/PageHeader.vue b/src/components/layout/PageHeader.vue
new file mode 100644
index 0000000..96a7f64
--- /dev/null
+++ b/src/components/layout/PageHeader.vue
@@ -0,0 +1,40 @@
+<script setup lang="ts">
+/**
+ * 页面 Header 通用组件
+ * 包含标题、描述、可选图标，以及默认 slot 用于额外内容
+ */
+
+defineProps<{
+  title: string
+  description?: string
+  icon?: string
+}>()
+</script>
+
+<template>
+  <div class="border-b border-gray-200 bg-white px-6 py-4 dark:border-gray-800 dark:bg-gray-900">
+    <!-- 标题区域 -->
+    <div class="flex items-center justify-between">
+      <div class="flex items-center gap-3">
+        <!-- 可选图标 -->
+        <div
+          v-if="icon"
+          class="flex h-10 w-10 items-center justify-center rounded-xl bg-linear-to-br from-pink-400 to-pink-600"
+        >
+          <UIcon :name="icon" class="h-5 w-5 text-white" />
+        </div>
+        <div>
+          <h1 class="text-lg font-semibold text-gray-900 dark:text-white">
+            {{ title }}
+          </h1>
+          <p v-if="description" class="text-xs text-gray-500 dark:text-gray-400">
+            {{ description }}
+          </p>
+        </div>
+      </div>
+    </div>
+
+    <!-- 额外内容 slot（如 Tabs） -->
+    <slot />
+  </div>
+</template>
diff --git a/src/pages/group-chat/index.vue b/src/pages/group-chat/index.vue
index d58a99b..8ad1503 100644
--- a/src/pages/group-chat/index.vue
+++ b/src/pages/group-chat/index.vue
@@ -12,6 +12,7 @@ import RankingTab from './components/RankingTab.vue'
 import QuotesTab from './components/QuotesTab.vue'
 import RelationshipsTab from './components/RelationshipsTab.vue'
 import MemberTab from './components/MemberTab.vue'
+import PageHeader from '@/components/layout/PageHeader.vue'
 
 const route = useRoute()
 const router = useRouter()
@@ -239,30 +240,14 @@ onMounted(() => {
     <!-- Content -->
     <template v-else-if="session">
       <!-- Header -->
-      <div class="border-b border-gray-200 bg-white px-6 py-4 dark:border-gray-800 dark:bg-gray-900">
-        <div class="flex items-center justify-between">
-          <!-- Session Info -->
-          <div class="flex items-center gap-3">
-            <div
-              class="flex h-10 w-10 items-center justify-center rounded-xl bg-gradient-to-br from-pink-400 to-pink-600"
-            >
-              <UIcon name="i-heroicons-chat-bubble-left-right" class="h-5 w-5 text-white" />
-            </div>
-            <div>
-              <h1 class="text-lg font-semibold text-gray-900 dark:text-white">
-                {{ session.name }}
-              </h1>
-              <p class="text-xs text-gray-500 dark:text-gray-400">
-                {{ dateRangeText }}，{{ selectedYear ? filteredMemberCount : session.memberCount }} 位成员共聊了
-                {{ selectedYear ? filteredMessageCount : session.messageCount }} 条消息
-              </p>
-            </div>
-          </div>
-        </div>
-
+      <PageHeader
+        :title="session.name"
+        :description="`${dateRangeText}，${selectedYear ? filteredMemberCount : session.memberCount} 位成员共聊了 ${selectedYear ? filteredMessageCount : session.messageCount} 条消息`"
+        icon="i-heroicons-chat-bubble-left-right"
+      >
         <!-- Tabs -->
         <div class="mt-4 flex items-center justify-between gap-4">
-          <div class="flex flex-shrink-0 items-center gap-1 overflow-x-auto scrollbar-hide">
+          <div class="flex shrink-0 items-center gap-1 overflow-x-auto scrollbar-hide">
             <button
               v-for="tab in tabs"
               :key="tab.id"
@@ -284,10 +269,10 @@ onMounted(() => {
             v-model="selectedYear"
             :items="yearOptions"
             size="sm"
-            class="min-w-0 flex-shrink"
+            class="min-w-0 shrink"
           />
         </div>
-      </div>
+      </PageHeader>
 
       <!-- Tab Content -->
       <div class="relative flex-1 overflow-y-auto">
diff --git a/src/pages/private-chat/index.vue b/src/pages/private-chat/index.vue
index 3cb8a38..889d52e 100644
--- a/src/pages/private-chat/index.vue
+++ b/src/pages/private-chat/index.vue
@@ -10,6 +10,7 @@ import AITab from '@/components/analysis/AITab.vue'
 import OverviewTab from './components/OverviewTab.vue'
 import QuotesTab from './components/QuotesTab.vue'
 import MemberTab from './components/MemberTab.vue'
+import PageHeader from '@/components/layout/PageHeader.vue'
 
 const route = useRoute()
 const router = useRouter()
@@ -217,29 +218,14 @@ onMounted(() => {
     <!-- Content -->
     <template v-else-if="session">
       <!-- Header -->
-      <div class="border-b border-gray-200 bg-white px-6 py-4 dark:border-gray-800 dark:bg-gray-900">
-        <div class="flex items-center justify-between">
-          <!-- Session Info -->
-          <div class="flex items-center gap-3">
-            <div
-              class="flex h-10 w-10 items-center justify-center rounded-xl bg-gradient-to-br from-pink-400 to-pink-600"
-            >
-              <UIcon name="i-heroicons-user" class="h-5 w-5 text-white" />
-            </div>
-            <div>
-              <h1 class="text-lg font-semibold text-gray-900 dark:text-white">
-                {{ session.name }}
-              </h1>
-              <p class="text-xs text-gray-500 dark:text-gray-400">
-                {{ dateRangeText }}，共 {{ selectedYear ? filteredMessageCount : session.messageCount }} 条消息
-              </p>
-            </div>
-          </div>
-        </div>
-
+      <PageHeader
+        :title="session.name"
+        :description="`${dateRangeText}，共 ${selectedYear ? filteredMessageCount : session.messageCount} 条消息`"
+        icon="i-heroicons-user"
+      >
         <!-- Tabs -->
         <div class="mt-4 flex items-center justify-between gap-4">
-          <div class="flex flex-shrink-0 items-center gap-1 overflow-x-auto scrollbar-hide">
+          <div class="flex shrink-0 items-center gap-1 overflow-x-auto scrollbar-hide">
             <button
               v-for="tab in tabs"
               :key="tab.id"
@@ -261,10 +247,10 @@ onMounted(() => {
             v-model="selectedYear"
             :items="yearOptions"
             size="sm"
-            class="min-w-0 flex-shrink"
+            class="min-w-0 shrink"
           />
         </div>
-      </div>
+      </PageHeader>
 
       <!-- Tab Content -->
       <div class="relative flex-1 overflow-y-auto">
diff --git a/src/pages/tools.vue b/src/pages/tools.vue
index d846cc7..6e32e7b 100644
--- a/src/pages/tools.vue
+++ b/src/pages/tools.vue
@@ -2,6 +2,7 @@
 import { ref } from 'vue'
 import { SubTabs } from '@/components/UI'
 import MergeTab from '@/components/tools/MergeTab.vue'
+import PageHeader from '@/components/layout/PageHeader.vue'
 
 // Tab 配置
 const tabs = [{ id: 'merge', label: '合并聊天记录', icon: 'i-heroicons-document-duplicate' }]
@@ -12,10 +13,7 @@ const activeTab = ref('merge')
 <template>
   <div class="flex h-full flex-col bg-gray-50 dark:bg-gray-950">
     <!-- Header -->
-    <div class="border-b border-gray-200 bg-white px-6 py-4 dark:border-gray-800 dark:bg-gray-900">
-      <h1 class="text-xl font-semibold text-gray-900 dark:text-white">实用工具</h1>
-      <p class="mt-1 text-sm text-gray-500 dark:text-gray-400">提供聊天记录处理的实用工具</p>
-    </div>
+    <PageHeader title="实用工具" description="提供聊天记录处理的实用工具" icon="i-heroicons-wrench-screwdriver" />
 
     <!-- Tabs -->
     <SubTabs v-model="activeTab" :items="tabs" />