feat: 智能体对话标题自动更新+历史显示优化

www/app.js

@@ -792,7 +792,7 @@ function renderAgentsPage() {
                   <span class="recent-agent-name">${conv.title}</span>
                 </div>
                 <div class="recent-agent-right">
-                  <span class="recent-agent-agent-name">${conv.agent ? conv.agent.name : '未知智能体'}</span>
+                  <span class="recent-agent-category">${conv.agent ? getCategoryLabel(conv.agent.category) : '未知'}</span>
                   <span class="recent-agent-time">${formatTime(conv.updatedAt)}</span>
                 </div>
               </div>
@@ -3006,7 +3006,7 @@ function showAgentHistoryPage() {
                 <span class="agent-history-name">${conv.title}</span>
               </div>
               <div class="agent-history-right">
-                <span class="agent-history-agent">${conv.agent ? conv.agent.name : '未知智能体'}</span>
+                <span class="agent-history-category">${conv.agent ? getCategoryLabel(conv.agent.category) : '未知'}</span>
                 <span class="agent-history-time">${formatTime(conv.updatedAt)}</span>
               </div>
             </div>
@@ -3087,7 +3087,7 @@ async function openAgent(agentId) {
   // 创建新对话并设置智能体
   const newConv = {
     id: backendId || Date.now().toString(),
-    title: currentAgent.name,
+    title: '新对话',  // 和普通对话一样，初始标题为"新对话"，后续自动生成
     messages: [],
     agentId: agentId,
     createdAt: Date.now(),
@@ -4541,7 +4541,11 @@ function renderMessages() {
   
   messagesDiv.innerHTML = currentConversation.messages.map((msg, index) => {
     const isUser = msg.role === 'user';
-    const avatar = isUser ? '👤' : '🤖';
+    // 用户头像使用实际头像，AI头像使用智能体头像或默认
+    const avatar = isUser
+      ? (currentUser?.avatar || '👤')
+      : (currentAgent?.avatar || '🤖');
+    const avatarHtml = isUser ? renderAvatar(avatar) : avatar;
     
     // 处理消息内容（支持图片）
     let contentHtml = '';
@@ -4616,7 +4620,7 @@ function renderMessages() {
     
     return `
       <div class="message ${msg.role}" data-index="${index}">
-        <div class="message-avatar">${avatar}</div>
+        <div class="message-avatar">${avatarHtml}</div>
         <div class="message-body">
           ${searchHtml}
           ${thinkingHtml}

www/style.css

@@ -1730,7 +1730,7 @@ body {
   color: var(--primary);
 }
 
-.recent-agent-agent-name {
+.recent-agent-category {
   font-size: 12px;
   color: var(--primary);
   background: rgba(102, 126, 234, 0.1);
@@ -1807,7 +1807,7 @@ body {
   color: var(--primary);
 }
 
-.agent-history-agent {
+.agent-history-category {
   font-size: 12px;
   color: var(--primary);
   background: rgba(102, 126, 234, 0.1);