diff --git a/web/src/components/AgentChatComponent.vue b/web/src/components/AgentChatComponent.vue
index 947892a5..1c4b3396 100644
--- a/web/src/components/AgentChatComponent.vue
+++ b/web/src/components/AgentChatComponent.vue
@@ -381,6 +381,14 @@ const hasAgentStateContent = computed(() => {
   return todoCount > 0 || fileCount > 0
 })
 
+// 监听 hasAgentStateContent 从 false → true 时，自动展开面板
+watch(hasAgentStateContent, (newVal, oldVal) => {
+  if (newVal && !oldVal) {
+    // 从无状态变为有状态时，自动展开面板
+    isAgentPanelOpen.value = true
+  }
+})
+
 const mentionConfig = computed(() => {
   const rawFiles = currentAgentState.value?.files || {}
   const files = []
@@ -1273,20 +1281,25 @@ const sendMessage = async ({
 // 检查第一个对话是否为空
 const isFirstChatEmpty = () => {
   if (threads.value.length === 0) return false
-  const firstThread = threads.value[0]
-  const firstThreadMessages = threadMessages.value[firstThread.id] || []
-  return firstThreadMessages.length === 0
+  const chatToReuse = getFirstNonPinnedChat(threads.value)
+  const messages = threadMessages.value[chatToReuse.id]
+  // 只有当消息已加载且为空时才返回 true
+  return messages !== undefined && messages.length === 0
 }
 
 // 获取第一个非置顶的对话
 const getFirstNonPinnedChat = (chatList) => {
+  if (!chatList || chatList.length === 0) return null
   return chatList.find((chat) => !chat.is_pinned) || chatList[0]
 }
 
 // 如果第一个对话为空，直接切换到第一个非置顶对话
 const switchToFirstChatIfEmpty = async () => {
   if (threads.value.length > 0 && isFirstChatEmpty()) {
-    await selectChat(getFirstNonPinnedChat(threads.value).id)
+    const chatToReuse = getFirstNonPinnedChat(threads.value)
+    if (chatState.currentThreadId !== chatToReuse.id) {
+      await selectChat(chatToReuse.id)
+    }
     return true
   }
   return false
diff --git a/web/src/components/AgentInputArea.vue b/web/src/components/AgentInputArea.vue
index 1f2ab9b3..c564c590 100644
--- a/web/src/components/AgentInputArea.vue
+++ b/web/src/components/AgentInputArea.vue
@@ -210,9 +210,6 @@ defineExpose({
     font-weight: 500;
   }
 
-  &:active {
-    transform: scale(0.95);
-  }
 
   &.disabled {
     opacity: 0.5;
diff --git a/web/src/components/AgentPanel.vue b/web/src/components/AgentPanel.vue
index 68b77903..786c6e02 100644
--- a/web/src/components/AgentPanel.vue
+++ b/web/src/components/AgentPanel.vue
@@ -137,7 +137,7 @@
 </template>
 
 <script setup>
-import { computed, ref, onMounted, onUpdated, nextTick } from 'vue'
+import { computed, ref, onMounted, onUpdated, nextTick, watch } from 'vue'
 import { Download, X, FolderCode, RefreshCw, Folder, FolderOpen } from 'lucide-vue-next'
 import {
   CheckCircleOutlined,
@@ -225,6 +225,7 @@ const checkOverflow = () => {
 
 onMounted(() => {
   nextTick(checkOverflow)
+  updateActiveTab()
 })
 
 onUpdated(() => {
@@ -262,6 +263,22 @@ const normalizedFiles = computed(() => {
   return result
 })
 
+// 自动切换 tab 逻辑：如果 files 为空且有 todos，自动切换到 todos tab
+const updateActiveTab = () => {
+  const fileList = normalizedFiles.value
+  const todoList = todos.value
+
+  // 如果当前是 files tab，但文件为空且有 todos，切换到 todos
+  if (activeTab.value === 'files' && fileList.length === 0 && todoList.length > 0) {
+    activeTab.value = 'todos'
+  }
+}
+
+// 监听 files 和 todos 变化，自动切换 tab
+watch([() => props.agentState?.files, () => props.agentState?.todos], () => {
+  updateActiveTab()
+}, { deep: true })
+
 const expandedKeys = ref([])
 
 const buildTreeData = (filesList) => {
diff --git a/web/src/components/AttachmentOptionsComponent.vue b/web/src/components/AttachmentOptionsComponent.vue
index 8c3b5bb1..41ec78fa 100644
--- a/web/src/components/AttachmentOptionsComponent.vue
+++ b/web/src/components/AttachmentOptionsComponent.vue
@@ -153,10 +153,6 @@ const processImageUpload = async (file) => {
   cursor: pointer;
   transition: all 0.2s ease;
 
-  &:active {
-    transform: scale(0.98);
-  }
-
   &.disabled {
     cursor: not-allowed;
     opacity: 0.5;
diff --git a/web/src/components/ChatSidebarComponent.vue b/web/src/components/ChatSidebarComponent.vue
index 78a66bba..b8cd77ab 100644
--- a/web/src/components/ChatSidebarComponent.vue
+++ b/web/src/components/ChatSidebarComponent.vue
@@ -39,7 +39,6 @@
             @click.middle="handleMiddleClickDelete(chat.id)"
           >
             <div class="conversation-title">
-              <Pin v-if="chat.is_pinned" :size="14" class="pin-icon" />
               <span>{{ chat.title || '新的对话' }}</span>
             </div>
             <div class="actions-mask"></div>
@@ -70,9 +69,12 @@
                     </a-menu-item>
                   </a-menu>
                 </template>
-                <a-button type="text" class="more-btn" @click.stop>
-                  <MoreVertical :size="16" />
-                </a-button>
+                <div class="action-btn-wrapper">
+                  <a-button type="text" class="more-btn" @click.stop>
+                    <MoreVertical :size="16" />
+                  </a-button>
+                  <Pin v-if="chat.is_pinned" :size="14" class="pinned-indicator" />
+                </div>
               </a-dropdown>
             </div>
           </div>
@@ -399,11 +401,6 @@ const togglePin = (chatId) => {
         display: flex;
         align-items: center;
         gap: 4px;
-
-        .pin-icon {
-          flex-shrink: 0;
-          color: var(--main-color);
-        }
       }
 
       .actions-mask {
@@ -428,30 +425,70 @@ const togglePin = (chatId) => {
         opacity: 0;
         transition: opacity 0.3s ease;
 
+        .action-btn-wrapper {
+          display: flex;
+          align-items: center;
+          justify-content: center;
+          width: 24px;
+          height: 24px;
+          position: relative;
+        }
+
+        .pinned-indicator {
+          color: var(--main-color);
+          opacity: 0.8;
+          pointer-events: none;
+        }
+
         .more-btn {
+          position: absolute;
+          top: 0;
+          left: 0;
+          width: 100%;
+          height: 100%;
           color: var(--gray-600);
           background-color: transparent !important;
-          display: flex;
+          display: none;
           justify-content: center;
           align-items: center;
           padding: 0;
+          z-index: 1;
+
           &:hover {
             color: var(--main-500);
-            background-color: transparent !important;
           }
         }
       }
 
+      // 默认显示置顶图标
+      &:has(.pinned-indicator) {
+        .conversation-actions,
+        .actions-mask {
+          opacity: 1;
+        }
+        .actions-mask {
+          background: linear-gradient(to right, transparent, var(--bg-sider) 30px);
+        }
+      }
+
       &:hover {
         background-color: var(--gray-25);
 
         .actions-mask {
           background: linear-gradient(to right, transparent, var(--gray-25) 20px);
+          opacity: 1;
         }
 
-        .actions-mask,
         .conversation-actions {
           opacity: 1;
+
+          .more-btn {
+            display: flex;
+          }
+
+          .pinned-indicator {
+            display: none;
+          }
         }
       }
 
@@ -462,8 +499,16 @@ const togglePin = (chatId) => {
           color: var(--main-600);
           font-weight: 500;
         }
+
         .actions-mask {
           background: linear-gradient(to right, transparent, var(--gray-50) 20px);
+          opacity: 1;
+        }
+
+        &:has(.pinned-indicator) {
+          .actions-mask {
+            background: linear-gradient(to right, transparent, var(--gray-50) 30px);
+          }
         }
       }
     }
diff --git a/web/src/components/MessageInputComponent.vue b/web/src/components/MessageInputComponent.vue
index b81eec15..5b5ebb32 100644
--- a/web/src/components/MessageInputComponent.vue
+++ b/web/src/components/MessageInputComponent.vue
@@ -769,7 +769,7 @@ defineExpose({
 
   &:active {
     color: var(--main-color);
-    transform: scale(0.95);
+    // 移除点击缩小效果
   }
 
   .anticon {
@@ -840,8 +840,8 @@ defineExpose({
   }
 
   &:active {
-    transform: translateY(0);
     box-shadow: 0 2px 4px var(--shadow-2);
+    // 移除点击动画效果
   }
 
   &:disabled {
diff --git a/web/src/components/ToolCallingResult/BaseToolCall.vue b/web/src/components/ToolCallingResult/BaseToolCall.vue
index a0db2e66..d397b1df 100644
--- a/web/src/components/ToolCallingResult/BaseToolCall.vue
+++ b/web/src/components/ToolCallingResult/BaseToolCall.vue
@@ -111,7 +111,8 @@ import {
   Calculator,
   CheckSquare,
   Wrench,
-  XCircle
+  XCircle,
+  HelpCircle
 } from 'lucide-vue-next'
 import { useAgentStore } from '@/stores/agent'
 import { storeToRefs } from 'pinia'
@@ -169,6 +170,8 @@ const toolIcon = computed(() => {
   if (name.includes('calc') || name.includes('math')) return Calculator
   // 任务
   if (name.includes('task') || name.includes('todo')) return CheckSquare
+  // 向用户提问
+  if (name.includes('ask_user_question') || name.includes('question')) return HelpCircle
   // 默认
   return Wrench
 })
diff --git a/web/src/components/ToolCallingResult/ToolCallRenderer.vue b/web/src/components/ToolCallingResult/ToolCallRenderer.vue
index f3e3d32d..40f18303 100644
--- a/web/src/components/ToolCallingResult/ToolCallRenderer.vue
+++ b/web/src/components/ToolCallingResult/ToolCallRenderer.vue
@@ -62,6 +62,9 @@
   <!-- MySQL 列出表 -->
   <MysqlListTablesTool v-else-if="toolName === 'mysql_list_tables'" :tool-call="toolCall" />
 
+  <!-- 向用户提问 -->
+  <AskUserQuestionTool v-else-if="toolName === 'ask_user_question'" :tool-call="toolCall" />
+
   <!-- 默认展示 -->
   <BaseToolCall v-else :tool-call="toolCall" />
 </template>
@@ -89,6 +92,7 @@ import EditFileTool from './tools/EditFileTool.vue'
 import MysqlQueryTool from './tools/MysqlQueryTool.vue'
 import MysqlDescribeTableTool from './tools/MysqlDescribeTableTool.vue'
 import MysqlListTablesTool from './tools/MysqlListTablesTool.vue'
+import AskUserQuestionTool from './tools/AskUserQuestionTool.vue'
 
 const props = defineProps({
   toolCall: {
diff --git a/web/src/components/ToolCallingResult/tools/AskUserQuestionTool.vue b/web/src/components/ToolCallingResult/tools/AskUserQuestionTool.vue
new file mode 100644
index 00000000..4c519efb
--- /dev/null
+++ b/web/src/components/ToolCallingResult/tools/AskUserQuestionTool.vue
@@ -0,0 +1,86 @@
+<template>
+  <BaseToolCall :tool-call="toolCall" hide-params>
+    <template #header>
+      <div class="sep-header">
+        <span class="note">提问</span>
+        <span class="separator">|</span>
+        <span class="description">{{ shortQuestion }}</span>
+        <span v-if="userAnswer" class="tag tag-answered">
+          已回答: {{ displayAnswer }}
+        </span>
+      </div>
+    </template>
+  </BaseToolCall>
+</template>
+
+<script setup>
+import { computed } from 'vue'
+import BaseToolCall from '../BaseToolCall.vue'
+
+const props = defineProps({
+  toolCall: {
+    type: Object,
+    required: true
+  }
+})
+
+// 解析参数
+const parsedArgs = computed(() => {
+  const args = props.toolCall.args || props.toolCall.function?.arguments
+  if (!args) return {}
+  if (typeof args === 'object') return args
+  try {
+    return JSON.parse(args)
+  } catch {
+    return {}
+  }
+})
+
+// 解析结果
+const parsedResult = computed(() => {
+  const content = props.toolCall.tool_call_result?.content
+  if (!content) return null
+  if (typeof content === 'object') return content
+  try {
+    return JSON.parse(content)
+  } catch {
+    return null
+  }
+})
+
+const question = computed(() => parsedArgs.value.question || '')
+const shortQuestion = computed(() => {
+  const q = question.value
+  return q.length > 50 ? q.slice(0, 50) + '...' : q
+})
+
+// 用户答案
+const userAnswer = computed(() => {
+  const result = parsedResult.value
+  if (!result) return null
+  return result.user_answer || result.answer || null
+})
+
+// 显示答案
+const displayAnswer = computed(() => {
+  const answer = userAnswer.value
+  if (!answer) return ''
+  if (Array.isArray(answer)) {
+    return answer.join(', ')
+  }
+  return String(answer)
+})
+</script>
+
+<style lang="less" scoped>
+.sep-header {
+  .tag-answered {
+    margin-left: 8px;
+    color: var(--green-600);
+    background: var(--green-50);
+    padding: 2px 8px;
+    border-radius: 4px;
+    font-size: 12px;
+  }
+}
+</style>