diff --git a/web/src/components/chat/ChatAgentSelector.vue b/web/src/components/chat/ChatAgentSelector.vue
index 0631042..882adfb 100644
--- a/web/src/components/chat/ChatAgentSelector.vue
+++ b/web/src/components/chat/ChatAgentSelector.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { ElMessageBox } from 'element-plus'
 import type { Agent } from '@/views/chat/chat'
 
 const props = defineProps<{
@@ -14,12 +15,32 @@ const emit = defineEmits<{
   (e: 'toggleSelect', agent: Agent): void
   (e: 'confirm'): void
   (e: 'update:groupChatName', value: string): void
+  (e: 'delete', agent: Agent): void
 }>()
 
 // 点击智能体 - 只是选择，不直接确认
 const handleAgentClick = (agent: Agent) => {
   emit('toggleSelect', agent)
 }
+
+// 删除智能体
+const handleDeleteAgent = async (agent: Agent, event: Event) => {
+  event.stopPropagation()
+  try {
+    await ElMessageBox.confirm(
+      `确定要删除智能体 "${agent.name}" 吗？删除后无法恢复。`,
+      '删除确认',
+      {
+        confirmButtonText: '确定删除',
+        cancelButtonText: '取消',
+        type: 'warning',
+      }
+    )
+    emit('delete', agent)
+  } catch {
+    // 用户取消删除
+  }
+}
 </script>
 
 <template>
@@ -29,10 +50,10 @@ const handleAgentClick = (agent: Agent) => {
         <div class="bg-dark-800 rounded-xl w-full max-w-md border border-dark-600 shadow-2xl" @click.stop>
           <div class="p-4 border-b border-dark-600">
             <h3 class="text-lg font-semibold text-white">
-              {{ selectMode === 'single' ? '选择智能体' : '选择群聊成员' }}
+              {{ selectMode === 'single' ? '选择会话' : '选择群聊成员' }}
             </h3>
             <p class="text-sm text-gray-400 mt-1">
-              {{ selectMode === 'single' ? '选择一个智能体开始对话' : '选择多个智能体创建群聊' }}
+              {{ selectMode === 'single' ? '选择一个智能体开始新对话' : '选择多个智能体创建群聊' }}
             </p>
           </div>
 
@@ -53,7 +74,7 @@ const handleAgentClick = (agent: Agent) => {
                 v-for="agent in chatAgents"
                 :key="agent.id"
                 @click="handleAgentClick(agent)"
-                class="w-full flex items-center gap-3 px-3 py-2.5 rounded-lg transition-all duration-200"
+                class="w-full flex items-center gap-3 px-3 py-2.5 rounded-lg transition-all duration-200 group"
                 :class="selectedAgents.some(a => a.id === agent.id)
                   ? 'bg-orange-500/20 border border-orange-500/50'
                   : 'bg-dark-700 hover:bg-dark-600 border border-transparent'"
diff --git a/web/src/components/chat/ChatMessage.vue b/web/src/components/chat/ChatMessage.vue
index a8d44b3..3f4355a 100644
--- a/web/src/components/chat/ChatMessage.vue
+++ b/web/src/components/chat/ChatMessage.vue
@@ -63,7 +63,12 @@ const copyMessage = async () => {
           : 'bg-[#1e1e28] text-gray-100 rounded-bl-sm'"
       >
         <span v-html="getMessageContent(message.content, message.role === 'user')"></span>
-        <span v-if="message.isStreaming" class="inline-block w-0.5 h-4 ml-0.5 bg-orange-300 cursor-blink align-middle"></span>
+        <!-- 等待提示 - 三个点动画 -->
+        <span v-if="message.isStreaming" class="inline-flex items-center ml-1 align-middle">
+          <span class="w-1.5 h-1.5 mx-0.5 bg-orange-400 rounded-full animate-bounce" style="animation-delay: 0ms;"></span>
+          <span class="w-1.5 h-1.5 mx-0.5 bg-orange-400 rounded-full animate-bounce" style="animation-delay: 150ms;"></span>
+          <span class="w-1.5 h-1.5 mx-0.5 bg-orange-400 rounded-full animate-bounce" style="animation-delay: 300ms;"></span>
+        </span>
 
         <!-- 复制按钮 -->
         <Transition name="fade">
diff --git a/web/src/components/chat/ChatSidebar.vue b/web/src/components/chat/ChatSidebar.vue
index fd2866f..bab05a2 100644
--- a/web/src/components/chat/ChatSidebar.vue
+++ b/web/src/components/chat/ChatSidebar.vue
@@ -1,12 +1,14 @@
 <script setup lang="ts">
+import { computed } from 'vue'
+import { ElMessageBox } from 'element-plus'
 import type { Agent, ChatSession, GroupChat } from '@/views/chat/chat'
 
-defineProps<{
+const props = defineProps<{
   collapsed: boolean
   chatAgents: Agent[]
   selectedAgent: Agent | null
   chatSessions: ChatSession[]
-  groupChats: GroupChat[]
+  groupChats?: GroupChat[]
 }>()
 
 const emit = defineEmits<{
@@ -14,8 +16,16 @@ const emit = defineEmits<{
   (e: 'selectAgent', agent: Agent): void
   (e: 'selectSession', session: ChatSession): void
   (e: 'selectGroup', group: GroupChat): void
+  (e: 'deleteSession', session: ChatSession): void
 }>()
 
+// 根据 agent_id 获取智能体名称
+const getAgentName = (agentId: number | string | undefined) => {
+  if (!agentId) return '未知智能体'
+  const agent = props.chatAgents.find(a => a.id === agentId)
+  return agent?.name || '未知智能体'
+}
+
 const formatRelativeTime = (date: Date) => {
   const now = new Date()
   const diff = now.getTime() - date.getTime()
@@ -27,6 +37,25 @@ const formatRelativeTime = (date: Date) => {
   if (days < 7) return `${days}天前`
   return date.toLocaleDateString('zh-CN')
 }
+
+// 删除会话
+const handleDeleteSession = async (session: ChatSession, event: Event) => {
+  event.stopPropagation()
+  try {
+    await ElMessageBox.confirm(
+      `确定要删除与 "${session.title}" 的对话吗？`,
+      '删除确认',
+      {
+        confirmButtonText: '确定删除',
+        cancelButtonText: '取消',
+        type: 'warning',
+      }
+    )
+    emit('deleteSession', session)
+  } catch {
+    // 用户取消删除
+  }
+}
 </script>
 
 <template>
@@ -69,47 +98,40 @@ const formatRelativeTime = (date: Date) => {
         </div>
       </div>
 
-      <!-- AI 助手选择 -->
-      <div class="px-3 pb-3">
-        <div class="text-xs text-white/40 uppercase tracking-wider mb-2 px-1">选择 AI 助手</div>
-        <div class="space-y-1">
-          <button
-            v-for="agent in chatAgents"
-            :key="agent.id"
-            @click="emit('selectAgent', agent)"
-            class="w-full flex items-center gap-2 px-3 py-2 rounded-lg transition-all duration-200"
-            :class="selectedAgent?.id === agent.id
-              ? 'bg-orange-500/15 text-orange-400'
-              : 'text-white/60 hover:bg-white/5 hover:text-white'"
-          >
-            <span class="text-base">{{ agent.avatar }}</span>
-            <span class="text-sm truncate">{{ agent.name }}</span>
-            <span
-              v-if="agent.status === 'online'"
-              class="w-1.5 h-1.5 rounded-full bg-emerald-400 ml-auto"
-            ></span>
-          </button>
-        </div>
-      </div>
-
-      <!-- 群聊列表 -->
+      <!-- 会话列表 -->
       <div class="flex-1 overflow-y-auto px-3 pb-3">
-        <div class="text-xs text-white/40 uppercase tracking-wider mb-2 px-1">群聊</div>
+        <div class="text-xs text-white/40 uppercase tracking-wider mb-2 px-1">会话</div>
         <div class="space-y-1">
           <button
-            v-for="group in groupChats"
-            :key="group.id"
-            @click="emit('selectGroup', group)"
+            v-for="session in chatSessions"
+            :key="session.id"
+            @click="emit('selectSession', session)"
             class="w-full text-left px-3 py-2.5 rounded-lg hover:bg-white/5 transition-all duration-200 group"
           >
             <div class="flex items-center gap-2">
               <svg class="w-4 h-4 text-white/30 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M17 20h5v-2a3 3 0 00-5.356-1.857M17 20H7m10 0v-2c0-.656-.126-1.283-.356-1.857M7 20H2v-2a3 3 0 015.356-1.857M7 20v-2c0-.656.126-1.283.356-1.857m0 0a5.002 5.002 0 019.288 0M15 7a3 3 0 11-6 0 3 3 0 016 0zm6 3a2 2 0 11-4 0 2 2 0 014 0zM7 10a2 2 0 11-4 0 2 2 0 014 0z"></path>
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M8 12h.01M12 12h.01M16 12h.01M21 12c0 4.418-4.03 8-9 8a9.863 9.863 0 01-4.255-.949L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8z"></path>
               </svg>
-              <span class="text-sm text-white/70 group-hover:text-white truncate">{{ group.name }}</span>
+              <span class="text-sm text-white/70 group-hover:text-white truncate flex-1">{{ session.title || '新会话' }}</span>
+              <!-- 删除按钮 -->
+              <span
+                @click="handleDeleteSession(session, $event)"
+                class="hidden group-hover:flex w-6 h-6 items-center justify-center rounded-md text-white/30 hover:text-red-400 hover:bg-red-500/20 transition-colors"
+                title="删除会话"
+              >
+                <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                  <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"></path>
+                </svg>
+              </span>
+            </div>
+            <div class="flex items-center gap-2 mt-1 pl-6">
+              <span class="text-xs text-orange-500/70">{{ getAgentName(session.agent_id) }}</span>
+              <span class="text-xs text-white/30">{{ formatRelativeTime(session.timestamp) }}</span>
             </div>
-            <div class="text-xs text-white/30 mt-1 pl-6">{{ group.members.length }} members</div>
           </button>
+          <div v-if="!chatSessions || chatSessions.length === 0" class="text-xs text-white/30 text-center py-4">
+            暂无会话记录
+          </div>
         </div>
       </div>
     </div>
diff --git a/web/src/views/Agents.vue b/web/src/views/Agents.vue
index af13a41..82d6d0c 100644
--- a/web/src/views/Agents.vue
+++ b/web/src/views/Agents.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { onUnmounted } from 'vue'
 import { Play, Pause, Edit, Trash2 } from 'lucide-vue-next'
 import { useAgents } from './agents/useAgents'
 import './agents/agents.css'
@@ -57,8 +58,13 @@ const {
   getSkillsDisplayText,
   toggleSkillSelection,
   selectAllSkills,
-  statusClass
+  statusClass,
+  cleanup
 } = useAgents()
+
+onUnmounted(() => {
+  cleanup()
+})
 </script>
 
 <template>
@@ -162,18 +168,18 @@ const {
                   class="btn-icon"
                   :title="agent.status === 'active' ? 'Deactivate' : 'Activate'"
                 >
-                  <Pause v-if="agent.status === 'active'" class="w-4 h-4 text-gray-500 hover:text-yellow-400 transition-colors" />
-                  <Play v-else class="w-4 h-4 text-gray-500 hover:text-green-400 transition-colors" />
+                  <Pause v-if="agent.status === 'active'" class="w-4 h-4 text-gray-400 hover:text-yellow-400 transition-colors" />
+                  <Play v-else class="w-4 h-4 text-gray-400 hover:text-green-400 transition-colors" />
                 </button>
                 <button @click="openEdit(agent)" class="btn-icon" title="Edit">
-                  <Edit class="w-4 h-4 text-gray-500 hover:text-white transition-colors" />
+                  <Edit class="w-4 h-4 text-gray-400 hover:text-white transition-colors" />
                 </button>
                 <button
                   @click.stop="deleteAgent(agent.id)"
                   class="btn-icon"
                   title="Delete"
                 >
-                  <Trash2 class="w-4 h-4 text-gray-500 hover:text-red-400 transition-colors" />
+                  <Trash2 class="w-4 h-4 text-gray-400 hover:text-red-500 transition-colors" />
                 </button>
               </div>
             </td>
diff --git a/web/src/views/Chat.vue b/web/src/views/Chat.vue
index ea0073b..040b354 100644
--- a/web/src/views/Chat.vue
+++ b/web/src/views/Chat.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, nextTick, onMounted, onUnmounted } from 'vue'
+import { ref, nextTick, watch, onMounted, onUnmounted } from 'vue'
 import { useChat } from './chat/chat'
 import ChatHeader from '@/components/chat/ChatHeader.vue'
 import ChatMessage from '@/components/chat/ChatMessage.vue'
@@ -45,19 +45,126 @@ const {
 
 const messagesContainer = ref<HTMLElement | null>(null)
 
-// Mock 流式响应（用于测试前端流式效果）
-const mockStreamResponse = async (content: string, messageIndex: number) => {
-  const chars = content.split('')
-  for (let i = 0; i < chars.length; i++) {
-    messages.value[messageIndex].content += chars[i]
-    await nextTick()
-    scrollToBottom()
-    await new Promise(resolve => setTimeout(resolve, 15))
+// 构建 API 请求体
+const buildRequestBody = (userContent: string) => {
+  const requestBody: any = {
+    agent_id: String(selectedAgent.value?.id || 1),
+    message: userContent,
+  }
+
+  if (selectedModel.value) {
+    requestBody.model_id = selectedModel.value.id
+  }
+
+  if (currentSessionId.value) {
+    requestBody.session_id = currentSessionId.value
+  }
+
+  return requestBody
+}
+
+// 解析流式响应数据
+const parseStreamData = (rawData: string): string => {
+  if (!rawData || rawData === '[DONE]') return ''
+
+  try {
+    const parsed = JSON.parse(rawData)
+    if (typeof parsed === 'string') {
+      return parsed
+    }
+    return parsed.content || parsed.delta?.content || ''
+  } catch {
+    return ''
+  }
+}
+
+// 处理流式响应
+const handleStreamResponse = async (response: Response) => {
+  const reader = response.body.getReader()
+  const decoder = new TextDecoder('utf-8')
+  let buffer = ''
+  const aiMessageIndex = messages.value.length - 1
+
+  while (true) {
+    const { done, value } = await reader.read()
+    if (done) break
+
+    const decoded = decoder.decode(value, { stream: true })
+    buffer += decoded
+
+    const lines = buffer.split('\n')
+    buffer = lines.pop() || ''
+
+    for (const line of lines) {
+      if (line.startsWith('data: ')) {
+        const content = parseStreamData(line.slice(6).trim())
+        if (content) {
+          messages.value[aiMessageIndex].content += content
+          await nextTick()
+          scrollToBottom()
+        }
+      }
+    }
+  }
+
+  // 处理剩余buffer
+  if (buffer.startsWith('data: ')) {
+    const content = parseStreamData(buffer.slice(6).trim())
+    if (content) {
+      messages.value[aiMessageIndex].content += content
+    }
+  }
+
+  messages.value[aiMessageIndex].isStreaming = false
+  isLoading.value = false
+  scrollToBottom()
+
+  // 保存 AI 消息
+  await saveMessage('assistant', messages.value[aiMessageIndex].content)
+
+  // 第二轮对话结束后生成标题
+  if (messages.value.length === 5 && currentSessionId.value) {
+    generateSessionTitle()
+  }
+}
+
+// 处理消息发送错误
+const handleMessageError = (error: any) => {
+  const errorIndex = messages.value.findIndex(m => m.isStreaming)
+  if (errorIndex > -1) {
+    messages.value[errorIndex].content = `Error: ${error.message || 'Failed to send message'}`
+    messages.value[errorIndex].isStreaming = false
   }
-  messages.value[messageIndex].isStreaming = false
   isLoading.value = false
 }
 
+// 重置输入框
+const resetInputHeight = () => {
+  nextTick(() => {
+    const textarea = document.querySelector('.chat-input-textarea') as HTMLTextAreaElement
+    if (textarea) {
+      textarea.style.height = 'auto'
+    }
+  })
+}
+
+// 创建用户消息对象
+const createUserMessage = (content: string) => ({
+  id: Date.now(),
+  role: 'user' as const,
+  content,
+  timestamp: new Date()
+})
+
+// 创建 AI 消息对象
+const createAssistantMessage = () => ({
+  id: Date.now() + 1,
+  role: 'assistant' as const,
+  content: '',
+  timestamp: new Date(),
+  isStreaming: true
+})
+
 // 滚动到底部
 const scrollToBottom = () => {
   if (messagesContainer.value) {
@@ -65,6 +172,11 @@ const scrollToBottom = () => {
   }
 }
 
+// 监听消息变化，自动滚动到底部
+watch(messages, () => {
+  nextTick(() => scrollToBottom())
+}, { deep: true })
+
 // 切换模型下拉框
 const toggleModelDropdown = () => {
   showModelDropdown.value = !showModelDropdown.value
@@ -76,133 +188,91 @@ const handleSelectModel = (model: any) => {
   showModelDropdown.value = false
 }
 
+// 删除会话
+const handleDeleteSession = async (session: any) => {
+  try {
+    const response = await fetch(`/api/chat/sessions/${session.id}`, {
+      method: 'DELETE',
+    })
+    if (response.ok) {
+      const index = chatSessions.value.findIndex((s: any) => s.id === session.id)
+      if (index > -1) {
+        chatSessions.value.splice(index, 1)
+      }
+      if (currentSessionId.value === session.id) {
+        currentSessionId.value = null
+        messages.value = []
+      }
+    }
+  } catch {
+    // ignore
+  }
+}
+
+// 生成会话标题
+const generateSessionTitle = async () => {
+  if (!currentSessionId.value) return
+
+  try {
+    const response = await fetch('/api/chat/sessions/generate-title', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ session_id: currentSessionId.value })
+    })
+
+    if (response.ok) {
+      const data = await response.json()
+      const sessionIndex = chatSessions.value.findIndex((s: any) => s.id === currentSessionId.value)
+      if (sessionIndex > -1) {
+        chatSessions.value[sessionIndex].title = data.title
+      }
+    }
+  } catch {
+    // ignore
+  }
+}
+
 // 发送消息
 const sendMessage = async () => {
   if (!inputMessage.value.trim() || isLoading.value) return
 
   const userContent = inputMessage.value.trim()
   inputMessage.value = ''
+  resetInputHeight()
 
-  // 重置输入框高度
-  nextTick(() => {
-    const textarea = document.querySelector('.chat-input-textarea') as HTMLTextAreaElement
-    if (textarea) {
-      textarea.style.height = 'auto'
-    }
-  })
-
-  // 如果没有会话，创建一个新会话
   if (!currentSessionId.value) {
-    await createSession()
+    const session = await createSession()
+    if (!session) return
   }
 
-  const userMessage = {
-    id: Date.now(),
-    role: 'user' as const,
-    content: userContent,
-    timestamp: new Date()
-  }
+  const userMessage = createUserMessage(userContent)
   messages.value.push(userMessage)
-
-  // 保存用户消息到后端
   await saveMessage('user', userContent)
 
-  const aiMessage = {
-    id: Date.now() + 1,
-    role: 'assistant' as const,
-    content: '',
-    timestamp: new Date(),
-    isStreaming: true
-  }
+  const aiMessage = createAssistantMessage()
   messages.value.push(aiMessage)
-
   nextTick(() => scrollToBottom())
-
   isLoading.value = true
 
   try {
-    const requestBody: any = {
-      agent_id: String(selectedAgent.value?.id || 1),
-      message: userContent,
-    }
-
-    if (selectedModel.value) {
-      requestBody.model_id = selectedModel.value.id
-    }
-
-    // 传入 session_id
-    if (currentSessionId.value) {
-      requestBody.session_id = currentSessionId.value
-    }
-
-    const response = await fetch(`/api/agent/chat/stream`, {
+    const response = await fetch('/api/agent/chat/stream', {
       method: 'POST',
-      headers: {
-        'Content-Type': 'application/json',
-      },
-      body: JSON.stringify(requestBody),
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(buildRequestBody(userContent)),
     })
 
     if (!response.ok) {
       throw new Error(`Request failed: ${response.status}`)
     }
 
-    // 真正的流式处理：边读取边显示
-    const reader = response.body.getReader()
-    const decoder = new TextDecoder()
-    let buffer = ''
-    const aiMessageIndex = messages.value.length - 1
-
-    while (true) {
-      const { done, value } = await reader.read()
-      if (done) break
-
-      buffer += decoder.decode(value, { stream: true })
-
-      const lines = buffer.split('\n')
-      buffer = lines.pop() || ''
-
-      for (const line of lines) {
-        if (line.startsWith('data: ')) {
-          const data = line.slice(6).trim()
-          if (data && data !== '[DONE]') {
-            // 直接累加内容并显示（真正的流式）
-            messages.value[aiMessageIndex].content += data
-            await nextTick()
-            scrollToBottom()
-          }
-        }
-      }
-    }
-
-    // 处理剩余buffer中的数据
-    if (buffer.startsWith('data: ')) {
-      const data = buffer.slice(6).trim()
-      if (data && data !== '[DONE]') {
-        messages.value[aiMessageIndex].content += data
-      }
-    }
-
-    messages.value[aiMessageIndex].isStreaming = false
-    isLoading.value = false
-    scrollToBottom()
-
-    // 保存 AI 消息到后端
-    await saveMessage('assistant', messages.value[aiMessageIndex].content)
+    await handleStreamResponse(response)
   } catch (error: any) {
-    console.error('[Stream] 错误:', error)
-    const errorIndex = messages.value.findIndex(m => m.isStreaming)
-    if (errorIndex > -1) {
-      messages.value[errorIndex].content = `Error: ${error.message || 'Failed to send message'}`
-      messages.value[errorIndex].isStreaming = false
-    }
-    isLoading.value = false
+    handleMessageError(error)
   }
 }
 
 // 初始化
 onMounted(() => {
-  console.log('[Chat] Component mounted, calling init()')
   init()
 })
 
@@ -269,6 +339,7 @@ onUnmounted(() => {
       @select-agent="selectAgent"
       @select-session="selectSession"
       @select-group="selectGroup"
+      @delete-session="handleDeleteSession"
     />
 
     <!-- 智能体选择弹窗 -->
diff --git a/web/src/views/agents/useAgents.ts b/web/src/views/agents/useAgents.ts
index 9ed4cf5..f9d57ca 100644
--- a/web/src/views/agents/useAgents.ts
+++ b/web/src/views/agents/useAgents.ts
@@ -278,7 +278,7 @@ async function createAgent() {
     const skillsLabels = newAgent.value.selectedSkills.map(id => getSkillLabel(id)).join(', ')
 
     agents.value.unshift({
-      id: result.agent_id,
+      id: result.agent_id_str || result.agent_id,
       name: newAgent.value.name,
       avatar: newAgent.value.avatar,
       description: newAgent.value.description,
@@ -341,6 +341,7 @@ async function saveEdit() {
       body: JSON.stringify({
         name: editingAgent.value.name,
         description: editingAgent.value.description,
+        avatar: editingAgent.value.avatar,
         skills: skills,
         role_description: editingAgent.value.prompt,
         model_provider: selectedModel?.provider || '',
@@ -353,6 +354,7 @@ async function saveEdit() {
       if (agent) {
         agent.name = editingAgent.value.name
         agent.description = editingAgent.value.description
+        agent.avatar = editingAgent.value.avatar
         agent.skills = editingAgent.value.skillsMode === 'all' ? '*' : editingAgent.value.selectedSkills.join(', ')
         agent.model = selectedModel?.name || ''
       }
diff --git a/web/src/views/chat/chat.ts b/web/src/views/chat/chat.ts
index 6c8508c..a71656d 100644
--- a/web/src/views/chat/chat.ts
+++ b/web/src/views/chat/chat.ts
@@ -20,7 +20,7 @@ export interface ChatMessage {
 }
 
 export interface Agent {
-  id: number
+  id: string | number
   name: string
   avatar: string
   description: string
@@ -40,7 +40,7 @@ export interface ChatSession {
 }
 
 export interface GroupChat {
-  id: number
+  id: string | number
   name: string
   members: string[]
   lastMessage: string
@@ -82,7 +82,6 @@ export const renderMarkdown = (content: string): string => {
     const processed = preprocessContent(content)
     return marked.parse(processed) as string
   } catch (e) {
-    console.error('Markdown parse error:', e)
     return content
   }
 }
@@ -150,24 +149,21 @@ export function useChat() {
     try {
       const response = await fetch(`/model/list`)
       const data = await response.json()
-      console.log('[Chat] Raw models:', data.list)
 
       if (data.list) {
         // 只过滤出 active 的 chat 模型 (status: 1=active, 0=inactive)
         const activeChatModels = data.list.filter((m: ChatModel) =>
           m.model_type === 'chat' && m.status === 1
         )
-        console.log('[Chat] Filtered chat models:', activeChatModels)
         chatModels.value = activeChatModels
 
         // 默认选中第一个 active 的 chat 模型
         if (chatModels.value.length > 0) {
           selectedModel.value = chatModels.value[0]
-          console.log('[Chat] Selected model:', selectedModel.value)
         }
       }
-    } catch (error) {
-      console.error('Failed to fetch models:', error)
+    } catch {
+      // 静默处理
     } finally {
       modelsLoading.value = false
     }
@@ -178,7 +174,6 @@ export function useChat() {
     try {
       const response = await fetch('/api/agent/list')
       const data = await response.json()
-      console.log('[Chat] Agents:', data)
 
       if (data.agents) {
         chatAgents.value = data.agents.map((agent: any) => ({
@@ -186,9 +181,9 @@ export function useChat() {
           name: agent.name,
           avatar: agent.avatar || '🧠',
           description: agent.description || '',
-          accentColor: agent.accent_color || '#f97316',
+          accentColor: '#f97316',
           gradient: 'from-orange-500/20 to-amber-500/20',
-          status: agent.status === 'active' ? 'online' : 'offline'
+          status: agent.is_active ? 'online' : 'offline'
         }))
 
         // 默认选中第一个智能体
@@ -196,8 +191,8 @@ export function useChat() {
           selectedAgent.value = chatAgents.value[0]
         }
       }
-    } catch (error) {
-      console.error('Failed to fetch agents:', error)
+    } catch {
+      // 静默处理
     }
   }
 
@@ -207,7 +202,6 @@ export function useChat() {
       const userId = localStorage.getItem('user_id') || 'default-user'
       const response = await fetch(`/api/chat/sessions?user_id=${userId}&limit=50`)
       const data = await response.json()
-      console.log('[Chat] Sessions:', data)
 
       if (data.list) {
         chatSessions.value = data.list.map((s: any) => ({
@@ -219,9 +213,13 @@ export function useChat() {
           timestamp: new Date(s.created_at || Date.now()),
           status: s.status
         }))
+
+        // 自动选择最近的会话并加载消息
+        // 页面加载时不自动选择会话，显示空页面
+        // 用户点击"新建聊天"或选择智能体时才创建会话
       }
-    } catch (error) {
-      console.error('Failed to fetch sessions:', error)
+    } catch {
+      // 静默处理
     }
   }
 
@@ -231,7 +229,6 @@ export function useChat() {
       const userId = localStorage.getItem('user_id') || 'default-user'
       const response = await fetch(`/api/chat/groups?user_id=${userId}`)
       const data = await response.json()
-      console.log('[Chat] Groups:', data)
 
       if (data.list) {
         groupChats.value = data.list.map((g: any) => ({
@@ -242,13 +239,13 @@ export function useChat() {
           timestamp: new Date(g.created_at || Date.now())
         }))
       }
-    } catch (error) {
-      console.error('Failed to fetch groups:', error)
+    } catch {
+      // 静默处理
     }
   }
 
   // 创建群聊
-  const createGroup = async (name: string, agentIds: number[]) => {
+  const createGroup = async (name: string, agentIds: (string | number)[]) => {
     try {
       const userId = localStorage.getItem('user_id') || 'default-user'
       const response = await fetch('/api/chat/groups', {
@@ -260,8 +257,12 @@ export function useChat() {
           agent_ids: JSON.stringify(agentIds)
         })
       })
+
+      if (!response.ok) {
+        console.error('Create group failed:', response.status, await response.text())
+        return null
+      }
       const group = await response.json()
-      console.log('[Chat] Created group:', group)
 
       // 添加到群聊列表
       groupChats.value.unshift({
@@ -273,8 +274,7 @@ export function useChat() {
       })
 
       return group
-    } catch (error) {
-      console.error('Failed to create group:', error)
+    } catch {
       return null
     }
   }
@@ -293,8 +293,12 @@ export function useChat() {
           model_id: selectedModel.value?.id
         })
       })
+
+      if (!response.ok) {
+        return null
+      }
+
       const session = await response.json()
-      console.log('[Chat] Created session:', session)
 
       // 添加到会话列表
       chatSessions.value.unshift({
@@ -307,8 +311,7 @@ export function useChat() {
 
       currentSessionId.value = session.id
       return session
-    } catch (error) {
-      console.error('Failed to create session:', error)
+    } catch {
       return null
     }
   }
@@ -318,7 +321,6 @@ export function useChat() {
     try {
       const response = await fetch(`/api/chat/sessions/${sessionId}/messages?limit=100`)
       const data = await response.json()
-      console.log('[Chat] Messages:', data)
 
       if (data.list) {
         messages.value = data.list.map((m: any) => ({
@@ -328,27 +330,37 @@ export function useChat() {
           timestamp: new Date(m.created_at)
         }))
       }
-    } catch (error) {
-      console.error('Failed to fetch messages:', error)
+    } catch {
+      // 静默处理
     }
   }
 
   // 保存消息到后端
   const saveMessage = async (role: 'user' | 'assistant', content: string) => {
-    if (!currentSessionId.value) return
+    const sessionId = currentSessionId.value
+    if (!sessionId || typeof sessionId !== 'string' || sessionId.trim() === '') {
+      return
+    }
+
+    // 检查内容是否有效
+    if (!content || typeof content !== 'string' || content.trim() === '') {
+      return
+    }
+
+    const payload = {
+      session_id: sessionId,
+      role: role,
+      content: content
+    }
 
     try {
       await fetch('/api/chat/messages', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({
-          session_id: currentSessionId.value,
-          role: role,
-          content: content
-        })
+        body: JSON.stringify(payload)
       })
-    } catch (error) {
-      console.error('Failed to save message:', error)
+    } catch {
+      // 静默处理
     }
   }
 
@@ -360,8 +372,8 @@ export function useChat() {
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({ title })
       })
-    } catch (error) {
-      console.error('Failed to update session:', error)
+    } catch {
+      // 静默处理
     }
   }
 
@@ -376,8 +388,8 @@ export function useChat() {
         currentSessionId.value = null
         messages.value = []
       }
-    } catch (error) {
-      console.error('Failed to delete session:', error)
+    } catch {
+      // 静默处理
     }
   }
 
@@ -452,19 +464,47 @@ export function useChat() {
     showAgentSelector.value = false
   }
 
-  // 选择助手
-  const selectAgent = (agent: Agent) => {
+  // 选择助手 - 如果是同一智能体则不创建新会话
+  const selectAgent = async (agent: Agent) => {
+    // 如果选择的是同一智能体，不创建新会话，直接返回
+    if (selectedAgent.value?.id === agent.id) {
+      return
+    }
+
     selectedAgent.value = agent
+
+    // 创建新会话
+    const session = await createSession(`与 ${agent.name} 的对话`)
+    if (session) {
+      currentSessionId.value = session.id
+    }
+
     messages.value = [
-      { id: 1, role: 'assistant', content: `你好！我是 ${agent.name}。有什么我可以帮助你的吗？`, timestamp: new Date() }
+      { id: Date.now(), role: 'assistant', content: `你好！我是 ${agent.name}，你的 AI 助手。有什么我可以帮助你的吗？`, timestamp: new Date() }
     ]
+
+    // 保存助手欢迎消息
+    if (currentSessionId.value) {
+      await saveMessage('assistant', messages.value[0].content)
+    }
   }
 
   // 选择群聊
-  const selectGroup = (group: GroupChat) => {
+  const selectGroup = async (group: GroupChat) => {
+    // 创建新会话
+    const session = await createSession(group.name)
+    if (session) {
+      currentSessionId.value = session.id
+    }
+
     messages.value = [
-      { id: 1, role: 'assistant', content: `你好！欢迎进入群聊 "${group.name}"，${group.members.length} 位智能体已加入。`, timestamp: new Date() }
+      { id: Date.now(), role: 'assistant', content: `你好！欢迎进入群聊 "${group.name}"，${group.members.length} 位智能体已加入。`, timestamp: new Date() }
     ]
+
+    // 保存助手欢迎消息
+    if (currentSessionId.value) {
+      await saveMessage('assistant', messages.value[0].content)
+    }
   }
 
   // 选择历史对话