diff --git a/src/components/chat/HistoryButton.vue b/src/components/chat/HistoryButton.vue
deleted file mode 100644
index 56bb10b..0000000
--- a/src/components/chat/HistoryButton.vue
+++ /dev/null
@@ -1,196 +0,0 @@
-<template>
-  <el-dropdown trigger="hover" @command="handleHistorySelect">
-    <el-button 
-      :class="['history-btn', { 'icon-only': iconOnly }]" 
-      :icon="Clock" 
-      text 
-      bg
-    >
-      <span v-if="!iconOnly">历史会话</span>
-    </el-button>
-    <template #dropdown>
-      <el-dropdown-menu>
-        <template v-if="currentModeHistory.length">
-          <el-dropdown-item 
-            v-for="chat in currentModeHistory" 
-            :key="chat.conversationId"
-            :command="chat.conversationId"
-            class="history-item"
-          >
-            <div class="history-content">
-              <span class="history-title">{{ formatChatTitle(chat) }}</span>
-              <el-button
-                class="delete-btn"
-                :icon="Delete"
-                link
-                @click.stop="handleDelete(chat.conversationId)"
-              />
-            </div>
-          </el-dropdown-item>
-        </template>
-        <el-dropdown-item v-else disabled>暂无历史会话</el-dropdown-item>
-      </el-dropdown-menu>
-    </template>
-  </el-dropdown>
-</template>
-
-<script setup>
-import { computed } from 'vue'
-import { useChatStore } from '@/store/chat'
-import { Clock, Delete } from '@element-plus/icons-vue'
-import { ElMessageBox } from 'element-plus'
-
-const props = defineProps({
-  iconOnly: {
-    type: Boolean,
-    default: false
-  }
-})
-
-const chatStore = useChatStore()
-
-const currentModeHistory = computed(() => {
-  return chatStore.conversations.filter(chat => chat.mode === chatStore.currentMode)
-})
-
-const formatChatTitle = (chat) => {
-  if (chat.messages && chat.messages.length > 0) {
-    const firstMessage = chat.messages[0].question
-    return firstMessage.length > 20 ? firstMessage.substring(0, 20) + '...' : firstMessage
-  }
-  return `会话 ${chat.conversationId.substring(0, 8)}`
-}
-
-const handleHistorySelect = (conversationId) => {
-  chatStore.switchConversation(conversationId)
-}
-
-const handleDelete = async (conversationId) => {
-  try {
-    await ElMessageBox.confirm(
-      '确定要删除这个会话吗？删除后无法恢复。',
-      '删除确认',
-      {
-        confirmButtonText: '确定',
-        cancelButtonText: '取消',
-        type: 'warning',
-        confirmButtonClass: 'el-button--danger'
-      }
-    )
-    chatStore.deleteConversation(conversationId)
-  } catch {
-    // 用户取消删除
-  }
-}
-</script>
-
-<style lang="scss" scoped>
-.history-btn {
-  height: 32px;
-  padding: 4px 12px;
-  color: inherit;
-  transition: all 0.3s ease;
-  display: flex;
-  align-items: center;
-  gap: 4px;
-  border: none !important;
-  background: transparent !important;
-  box-shadow: none !important;
-  outline: none !important;
-
-  &.icon-only {
-    width: 32px;
-    padding: 0;
-  }
-
-  &:hover,
-  &:focus {
-    color: var(--el-color-primary) !important;
-    background: transparent !important;
-    border: none !important;
-    box-shadow: none !important;
-    outline: none !important;
-  }
-
-  :deep(.el-icon) {
-    font-size: 16px;
-  }
-}
-
-:deep(.el-dropdown__trigger) {
-  .el-button {
-    border: none !important;
-    background: transparent !important;
-    box-shadow: none !important;
-    outline: none !important;
-
-    &:hover,
-    &:focus {
-      border: none !important;
-      background: transparent !important;
-      box-shadow: none !important;
-      outline: none !important;
-      color: var(--el-color-primary) !important;
-    }
-  }
-}
-
-:deep(.el-dropdown-menu__item) {
-  font-size: 13px;
-  padding: 8px 16px;
-  line-height: 1.4;
-  max-width: 300px;
-  overflow-x: hidden;
-
-  &:hover .delete-btn {
-    opacity: 1;
-    transform: translateX(0);
-  }
-}
-
-:deep(.el-dropdown-menu) {
-  min-width: 200px;
-  max-width: 300px;
-}
-
-.history-content {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  gap: 8px;
-  width: 100%;
-  position: relative;
-  min-width: 0;
-}
-
-.history-title {
-  flex: 1;
-  white-space: nowrap;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  margin-right: 24px;
-  min-width: 0;
-}
-
-.delete-btn {
-  position: absolute;
-  right: -8px;
-  opacity: 0;
-  transform: translateX(10px);
-  transition: all 0.3s ease;
-  height: 24px;
-  width: 24px;
-  padding: 0;
-  color: #f56c6c;
-  flex-shrink: 0;
-  
-  &:hover {
-    color: #f56c6c;
-    background-color: rgba(245, 108, 108, 0.1);
-  }
-  
-  :deep(.el-icon) {
-    font-size: 14px;
-  }
-}
-</style> 
\ No newline at end of file
diff --git a/src/components/chat/HistoryList.vue b/src/components/chat/HistoryList.vue
new file mode 100644
index 0000000..5859bad
--- /dev/null
+++ b/src/components/chat/HistoryList.vue
@@ -0,0 +1,197 @@
+<template>
+  <el-menu-item-group class="history-item-group" v-show="!isCollapsed">
+    <template #title>
+      <el-icon><Clock /></el-icon>
+      <span>历史会话</span>
+    </template>
+    <template v-if="currentModeHistory.length">
+      <el-menu-item 
+        v-for="chat in currentModeHistory" 
+        :key="chat.conversationId"
+        :index="chat.conversationId"
+        class="history-item"
+      >
+        <div class="history-content">
+          <span class="history-title">{{ formatChatTitle(chat) }}</span>
+          <el-button
+            class="delete-btn"
+            :icon="Delete"
+            link
+            @click.stop="handleDelete(chat.conversationId)"
+          />
+        </div>
+      </el-menu-item>
+    </template>
+    <el-menu-item v-else disabled class="history-empty">
+      <span class="mode-name">暂无历史会话</span>
+    </el-menu-item>
+  </el-menu-item-group>
+</template>
+
+<script setup>
+import { computed } from 'vue'
+import { useChatStore } from '@/store/chat'
+import { useSettingsStore } from '@/store/settings'
+import { Clock, Delete } from '@element-plus/icons-vue'
+import { ElMessageBox } from 'element-plus'
+
+const chatStore = useChatStore()
+const settingsStore = useSettingsStore()
+
+const isCollapsed = computed(() => settingsStore.sidebarCollapsed)
+
+const currentModeHistory = computed(() => {
+  return chatStore.conversations.filter(chat => chat.mode === chatStore.currentMode)
+})
+
+const formatChatTitle = (chat) => {
+  if (chat.messages && chat.messages.length > 0) {
+    const firstMessage = chat.messages[0].question
+    return firstMessage.length > 20 ? firstMessage.substring(0, 20) + '...' : firstMessage
+  }
+  return `会话 ${chat.conversationId.substring(0, 8)}`
+}
+
+const handleDelete = async (conversationId) => {
+  try {
+    await ElMessageBox.confirm(
+      '确定要删除这个会话吗？删除后无法恢复。',
+      '删除确认',
+      {
+        confirmButtonText: '确定',
+        cancelButtonText: '取消',
+        type: 'warning',
+        confirmButtonClass: 'el-button--danger'
+      }
+    )
+    chatStore.deleteConversation(conversationId)
+  } catch {
+    // 用户取消删除
+  }
+}
+</script>
+
+<style lang="scss" scoped>
+.history-item-group {
+  margin-top: 16px;
+  
+  :deep(.el-menu-item-group__title) {
+    padding: 8px 12px !important;
+    font-size: 14px;
+    font-weight: bold;
+    color: var(--el-text-color-regular);
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    line-height: 20px;
+    
+    .el-icon {
+      font-size: 16px;
+      margin-right: 2px;
+    }
+  }
+
+  :deep(.el-menu-item-group__content) {
+    padding-left: 12px;
+  }
+}
+
+.history-item {
+  height: 44px !important;
+  line-height: 44px !important;
+  color: var(--el-text-color-regular);
+  border-radius: 8px;
+  margin-bottom: 4px;
+  margin-left: 24px;
+  padding: 0 12px !important;
+  overflow: hidden;
+  transition: all 0.3s ease;
+
+  &:hover {
+    background-color: var(--el-fill-color-light);
+  }
+
+  &.is-active {
+    background-image: linear-gradient(135deg, var(--el-color-primary) 0%, var(--el-color-primary-light-3) 100%);
+    color: var(--el-color-white);
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
+  }
+}
+
+.history-content {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  width: 100%;
+  position: relative;
+  min-width: 0;
+}
+
+.history-title {
+  flex: 1;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  margin-right: 24px;
+  min-width: 0;
+  font-size: 14px;
+}
+
+.delete-btn {
+  position: absolute;
+  right: -8px;
+  opacity: 0;
+  transform: translateX(10px);
+  transition: all 0.3s ease;
+  height: 24px;
+  width: 24px;
+  padding: 0;
+  color: var(--el-text-color-secondary);
+  flex-shrink: 0;
+  border-radius: 4px;
+  
+  &:hover {
+    color: var(--el-color-danger);
+    background-color: var(--el-color-danger-light-9);
+  }
+  
+  :deep(.el-icon) {
+    font-size: 14px;
+  }
+}
+
+.history-item:hover .delete-btn {
+  opacity: 1;
+  transform: translateX(0);
+}
+
+.history-empty {
+  opacity: 0.6;
+  cursor: not-allowed;
+  color: var(--el-text-color-secondary);
+  font-size: 14px;
+  padding: 0 12px !important;
+  margin-right: 12px;
+  height: 44px !important;
+  line-height: 44px !important;
+}
+
+// 暗黑模式适配
+:deep(html.dark) {
+  .history-item {
+    &:hover {
+      background-color: var(--el-fill-color-darker);
+    }
+    
+    &.is-active {
+      background-color: var(--el-color-primary-dark-2);
+      color: var(--el-color-white);
+    }
+  }
+  
+  .delete-btn:hover {
+    background-color: rgba(var(--el-color-danger-rgb), 0.2);
+  }
+}
+</style> 
\ No newline at end of file
diff --git a/src/views/chat/ChatHeader.vue b/src/views/chat/ChatHeader.vue
index b84feb5..beceffa 100644
--- a/src/views/chat/ChatHeader.vue
+++ b/src/views/chat/ChatHeader.vue
@@ -19,7 +19,6 @@
         </el-tag>
       </div>
       <div class="actions">
-        <HistoryButton :icon-only="false" class="title-history-btn" />
         <el-tooltip content="删除会话" placement="bottom" v-if="chatStore.conversationId">
           <el-button 
             class="action-btn delete-btn" 
@@ -60,7 +59,6 @@ import { useChatStore } from '@/store/chat'
 import { useSettingsStore } from '@/store/settings'
 import { Delete, Setting, User, Expand } from '@element-plus/icons-vue'
 import { ElMessageBox } from 'element-plus'
-import HistoryButton from '@/components/chat/HistoryButton.vue'
 import CustomerBackground from '@/components/chat/CustomerBackground.vue'
 
 const chatStore = useChatStore()
@@ -218,26 +216,6 @@ onUnmounted(() => {
       font-weight: normal;
       flex-shrink: 0;
     }
-
-    .title-history-btn {
-      :deep(.history-btn) {
-        height: 32px;
-        padding: 0 12px;
-        color: var(--el-text-color-secondary);
-        transition: all 0.3s ease;
-        font-size: 14px;
-        
-        &:hover {
-          color: var(--el-color-primary);
-          background-color: var(--el-color-primary-light-9);
-        }
-
-        :deep(.el-icon) {
-          font-size: 16px;
-          margin-right: 4px;
-        }
-      }
-    }
   }
 
   .actions {
diff --git a/src/views/chat/ChatModeSelector.vue b/src/views/chat/ChatModeSelector.vue
index 5688b53..cd6ba02 100644
--- a/src/views/chat/ChatModeSelector.vue
+++ b/src/views/chat/ChatModeSelector.vue
@@ -27,6 +27,8 @@
           <el-icon><component :is="mode.icon" /></el-icon>
           <span class="mode-name">{{ mode.name }}</span>
         </el-menu-item>
+
+        <HistoryList />
       </el-menu>
 
       <!-- Settings Button Popover -->
@@ -55,9 +57,10 @@
 import { useChatStore } from '@/store/chat'
 import { useSettingsStore } from '@/store/settings'
 import { computed, ref, onMounted, onUnmounted } from 'vue'
-import { ChatDotRound, ChatLineRound, ChatRound, Service, Setting } from '@element-plus/icons-vue'
-import { ElMenu, ElMenuItem, ElIcon, ElPopover } from 'element-plus'
+import { ChatDotRound, ChatLineRound, ChatRound, Service, Setting, Clock, Delete } from '@element-plus/icons-vue'
+import { ElMenu, ElMenuItem, ElIcon, ElPopover, ElMessageBox } from 'element-plus'
 import SettingsPanel from '@/components/settings/SettingsPanel.vue'
+import HistoryList from '@/components/chat/HistoryList.vue'
 
 const chatStore = useChatStore()
 const settingsStore = useSettingsStore()
@@ -77,8 +80,40 @@ const currentModeHistory = computed(() => {
   return chatStore.conversations.filter(chat => chat.mode === chatStore.currentMode)
 })
 
-const selectMode = (modeId) => {
-  chatStore.setCurrentMode(modeId)
+const formatChatTitle = (chat) => {
+  if (chat.messages && chat.messages.length > 0) {
+    const firstMessage = chat.messages[0].question
+    return firstMessage.length > 20 ? firstMessage.substring(0, 20) + '...' : firstMessage
+  }
+  return `会话 ${chat.conversationId.substring(0, 8)}`
+}
+
+const handleDelete = async (conversationId) => {
+  try {
+    await ElMessageBox.confirm(
+      '确定要删除这个会话吗？删除后无法恢复。',
+      '删除确认',
+      {
+        confirmButtonText: '确定',
+        cancelButtonText: '取消',
+        type: 'warning',
+        confirmButtonClass: 'el-button--danger'
+      }
+    )
+    chatStore.deleteConversation(conversationId)
+  } catch {
+    // 用户取消删除
+  }
+}
+
+const selectMode = (id) => {
+  // 检查是否是会话ID
+  const isConversationId = chatStore.conversations.some(chat => chat.conversationId === id)
+  if (isConversationId) {
+    chatStore.switchConversation(id)
+  } else {
+    chatStore.setCurrentMode(id)
+  }
 }
 
 const isMobile = ref(false)
@@ -153,310 +188,46 @@ onUnmounted(() => {
   padding: 8px;
   flex-grow: 1;
   overflow-y: auto;
-  
-  :deep(.el-menu-item) {
-    height: 44px;
-    line-height: 44px;
-    color: var(--el-text-color-regular);
-    border-radius: 8px;
-    margin-bottom: 4px;
-    padding: 0 12px !important;
-    overflow: hidden;
-
-    .el-icon {
-      margin-right: 12px;
-      font-size: 18px;
-      width: 18px;
-    }
-    
-    &.is-active {
-      background-image: linear-gradient(135deg, var(--el-color-primary) 0%, var(--el-color-primary-light-3) 100%);
-      color: var(--el-color-white);
-      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
-
-      .el-icon {
-        color: var(--el-color-white);
-      }
-    }
-    
-    &:not(.is-active):hover {
-      background-color: var(--el-color-primary-light-9);
-      color: var(--el-color-primary);
-    }
-    
-    .mode-name {
-      font-size: 14px;
-      margin-left: 12px;
-      white-space: nowrap;
-      opacity: 1;
-      transform: translateX(0);
-      
-      body:not(.no-animations) & {
-         transition: opacity 0.3s ease-in-out;
-      }
-    }
-  }
 }
 
-.mode-setting-btn {
-  position: absolute;
-  right: 8px;
-  top: 50%;
-  transform: translateY(-50%);
-  color: var(--el-text-color-secondary);
-  
-  &:hover {
-    color: var(--el-color-primary);
-  }
-}
-
-/* 移动端样式 */
-@media screen and (max-width: 768px) {
-  .mode-selector-backdrop {
-    position: fixed;
-    top: 0;
-    left: 0;
-    right: 0;
-    bottom: 0;
-    background-color: var(--el-overlay-color-lighter);
-    z-index: 9;
-    display: none;
-    
-    &.visible {
-      display: block;
-    }
-  }
-  
-  .mode-selector {
-    position: fixed;
-    left: 0;
-    top: 0;
-    
-    &.collapsed {
-      transform: translateX(-100%);
-    }
-  }
-}
-
-.mode-selector.collapsed {
-  .mode-header {
-    padding: 0;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    height: 60px;
-    
-    .mode-header-collapsed-logo {
-      display: flex;
-      align-items: center;
-      height: 100%;
-    }
-
-    .mode-header-icon.collapsed {
-        height: 32px;
-        filter: drop-shadow(0 0 0.75em rgba(var(--el-color-primary-rgb), 0.6));
-        vertical-align: middle;
-    }
-  }
-  
-  .mode-menu {
-    padding: 8px 12px;
-  }
-
-  :deep(.el-menu-item) {
-    width: 40px;
-    height: 40px;
-    padding: 0 !important;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    margin: 0 auto 4px auto;
-
-    .el-icon {
-      margin-right: 0;
-    }
-
-    .mode-name {
-      display: none;
-    }
-  }
-
-  .settings-button {
-    width: 40px;
-    height: 40px;
-    .mode-name,
-    .button-text {
-      opacity: 0;
-    }
-  }
-}
-
-.sidebar-footer {
-  height: 48px;
-  padding: 0 12px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-}
-
-.settings-button {
-  display: flex;
-  align-items: center;
-  height: 40px;
-  width: 100%;
-  padding: 0 12px;
+:deep(.mode-item) {
+  height: 44px;
+  line-height: 44px;
   color: var(--el-text-color-regular);
   border-radius: 8px;
-  cursor: pointer;
-  transition: background-color 0.2s ease-in-out, color 0.2s ease-in-out;
+  margin-bottom: 4px;
+  padding: 0 12px !important;
+  overflow: hidden;
 
   .el-icon {
     margin-right: 12px;
     font-size: 18px;
     width: 18px;
   }
+  
+  &.is-active {
+    background-image: linear-gradient(135deg, var(--el-color-primary) 0%, var(--el-color-primary-light-3) 100%);
+    color: var(--el-color-white);
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
 
-  &:hover {
-    background-color: var(--el-fill-color-light);
+    .el-icon {
+      color: var(--el-color-white);
+    }
+  }
+  
+  &:not(.is-active):hover {
+    background-color: var(--el-color-primary-light-9);
     color: var(--el-color-primary);
   }
-
-  .button-text {
+  
+  .mode-name {
     font-size: 14px;
     white-space: nowrap;
     opacity: 1;
-    transition: opacity 0.3s ease-in-out;
-  }
-}
-
-.mode-selector.collapsed {
-  .sidebar-footer {
-    padding: 0;
-  }
-
-  .settings-button {
-    justify-content: center;
-    width: 40px;
-    padding: 0;
-
-    .el-icon {
-      margin-right: 0;
-    }
-
-    .button-text {
-      opacity: 0;
-      pointer-events: none;
-    }
+    transform: translateX(0);
     
-    &:hover {
-      background-color: var(--el-fill-color-light);
-    }
-  }
-}
-</style>
-
-<style lang="scss">
-.settings-popover-popper {
-  min-width: 350px !important;
-  padding: 0 !important;
-  border: none !important;
-  box-shadow: var(--el-box-shadow-light);
-  border-radius: 8px;
-}
-</style>
-
-<style lang="scss" scoped>
-.mode-selector {
-  width: 240px;
-  height: 100%;
-  background-color: var(--el-color-primary-light-7);
-  border-right: 1px solid var(--el-border-color-light);
-  position: relative;
-  z-index: 10;
-  display: flex;
-  flex-direction: column;
-
-  body:not(.no-animations) & {
-    transition: width 0.3s ease-in-out;
-  }
-  
-  &.collapsed {
-    width: 64px;
-  }
-}
-
-.mode-header {
-  height: 60px;
-  padding: 0 16px;
-  display: flex;
-  align-items: center;
-  
-  &-title {
-    display: flex;
-    align-items: center;
-    
-    .mode-header-icon {
-      height: 32px;
-      will-change: filter;
-      
-      body:not(.no-animations) & {
-        transition: filter 300ms;
-      }
-      
-      &:hover {
-        filter: drop-shadow(0 0 0.75em rgba(var(--el-color-primary-rgb), 0.6)); 
-      }
-    }
-  }
-}
-
-.mode-menu {
-  background-color: transparent;
-  border: none;
-  padding: 8px;
-  flex-grow: 1;
-  overflow-y: auto;
-  
-  :deep(.el-menu-item) {
-    height: 44px;
-    line-height: 44px;
-    color: var(--el-text-color-regular);
-    border-radius: 8px;
-    margin-bottom: 4px;
-    padding: 0 12px !important;
-    overflow: hidden;
-
-    .el-icon {
-      margin-right: 12px;
-      font-size: 18px;
-      width: 18px;
-    }
-    
-    &.is-active {
-      background-image: linear-gradient(135deg, var(--el-color-primary) 0%, var(--el-color-primary-light-3) 100%);
-      color: var(--el-color-white);
-      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
-
-      .el-icon {
-        color: var(--el-color-white);
-      }
-    }
-    
-    &:not(.is-active):hover {
-      background-color: var(--el-color-primary-light-9);
-      color: var(--el-color-primary);
-    }
-    
-    .mode-name {
-      font-size: 14px;
-      margin-left: 12px;
-      white-space: nowrap;
-      opacity: 1;
-      transform: translateX(0);
-      
-      body:not(.no-animations) & {
-         transition: opacity 0.3s ease-in-out;
-      }
+    body:not(.no-animations) & {
+       transition: opacity 0.3s ease-in-out;
     }
   }
 }
@@ -640,4 +411,59 @@ html.dark .mode-selector {
       color: var(--el-color-primary);
   }
 }
+</style>
+
+<style lang="scss" scoped>
+.history-content {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  width: 100%;
+  position: relative;
+  min-width: 0;
+}
+
+.history-title {
+  flex: 1;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  margin-right: 24px;
+  min-width: 0;
+}
+
+.delete-btn {
+  position: absolute;
+  right: -8px;
+  opacity: 0;
+  transform: translateX(10px);
+  transition: all 0.3s ease;
+  height: 24px;
+  width: 24px;
+  padding: 0;
+  color: #f56c6c;
+  flex-shrink: 0;
+  
+  &:hover {
+    color: #f56c6c;
+    background-color: rgba(245, 108, 108, 0.1);
+  }
+  
+  :deep(.el-icon) {
+    font-size: 14px;
+  }
+}
+
+.history-item {
+  &:hover .delete-btn {
+    opacity: 1;
+    transform: translateX(0);
+  }
+}
+
+.history-empty {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
 </style> 
\ No newline at end of file