diff --git a/www/app.js b/www/app.js
index 42e311c..d674b4e 100644
--- a/www/app.js
+++ b/www/app.js
@@ -13,16 +13,19 @@ let conversations = [];  // 对话列表
 let currentConversation = null;  // 当前对话
 let isLoading = false;
 
-// DOM 元素
-const appContainer = document.getElementById('app');
-const messagesContainer = document.getElementById('messagesContainer');
-const messagesDiv = document.getElementById('messages');
-const userInput = document.getElementById('userInput');
-const sendBtn = document.getElementById('sendBtn');
-const welcome = document.getElementById('welcome');
+// DOM 元素（初始为 null，在 openConversation 时重新获取）
+let appContainer = null;
+let messagesContainer = null;
+let messagesDiv = null;
+let userInput = null;
+let sendBtn = null;
+let welcome = null;
 
 // 初始化
 document.addEventListener('DOMContentLoaded', () => {
+  // 初始化 appContainer
+  appContainer = document.getElementById('app');
+  
   // 从本地存储加载对话列表
   const saved = localStorage.getItem('conversations');
   if (saved) {
@@ -68,19 +71,19 @@ function showConversationList() {
       </header>
       
       <div class="list-content">
-        <button class="new-chat-btn" onclick="createNewConversation()">
+        <button class="new-chat-btn" id="newChatBtn">
           <svg viewBox="0 0 24 24" width="20" height="20"><path fill="currentColor" d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/></svg>
           新建对话
         </button>
         
-        <div class="conversation-list">
+        <div class="conversation-list" id="conversationList">
           ${conversations.length === 0 
             ? '<div class="empty-list">暂无对话记录</div>'
             : conversations.map(conv => `
-              <div class="conversation-item" onclick="openConversation('${conv.id}')">
+              <div class="conversation-item" data-id="${conv.id}">
                 <div class="conv-title">${escapeHtml(conv.title)}</div>
                 <div class="conv-meta">${conv.messages.length} 条消息 · ${formatTime(conv.updatedAt)}</div>
-                <button class="conv-delete-btn" onclick="event.stopPropagation(); deleteConversation('${conv.id}')" title="删除对话">
+                <button class="conv-delete-btn" data-id="${conv.id}" title="删除对话">
                   <svg viewBox="0 0 24 24" width="16" height="16"><path fill="currentColor" d="M6 19c0 1.1.9 2 2 2h8c1.1 0 2-.9 2-2V7H6v12zM19 4h-3.5l-1-1h-5l-1 1H5v2h14V4z"/></svg>
                 </button>
               </div>
@@ -92,6 +95,29 @@ function showConversationList() {
   `;
   
   appContainer.innerHTML = listHtml;
+  
+  // 绑定事件
+  const newChatBtn = document.getElementById('newChatBtn');
+  if (newChatBtn) {
+    newChatBtn.addEventListener('click', createNewConversation);
+  }
+  
+  const conversationList = document.getElementById('conversationList');
+  if (conversationList) {
+    conversationList.addEventListener('click', (e) => {
+      const item = e.target.closest('.conversation-item');
+      const deleteBtn = e.target.closest('.conv-delete-btn');
+      
+      if (deleteBtn) {
+        e.stopPropagation();
+        const id = deleteBtn.getAttribute('data-id');
+        deleteConversation(id);
+      } else if (item) {
+        const id = item.getAttribute('data-id');
+        openConversation(id);
+      }
+    });
+  }
 }
 
 // 创建新对话
@@ -121,14 +147,14 @@ function openConversation(id) {
   const chatHtml = `
     <div id="chatPage">
       <header class="header">
-        <button class="back-btn" onclick="showConversationList()">
+        <button class="back-btn" id="backBtn">
           <svg viewBox="0 0 24 24" width="24" height="24"><path fill="currentColor" d="M20 11H7.83l5.59-5.59L12 4l-8 8 8 8 1.41-1.41L7.83 13H20v-2z"/></svg>
         </button>
         <div class="header-title">
           <span class="logo">🤖</span>
           <h1>${escapeHtml(currentConversation.title)}</h1>
         </div>
-        <button class="clear-btn" onclick="clearCurrentChat()" title="清空对话">
+        <button class="clear-btn" id="clearBtn" title="清空对话">
           <svg viewBox="0 0 24 24" width="20" height="20"><path fill="currentColor" d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12 19 6.41z"/></svg>
         </button>
       </header>
@@ -152,10 +178,8 @@ function openConversation(id) {
           id="userInput" 
           placeholder="输入消息..." 
           rows="1"
-          onkeydown="handleKeyDown(event)"
-          oninput="autoResize(this)"
         ></textarea>
-        <button class="send-btn" onclick="sendMessage()" id="sendBtn">
+        <button class="send-btn" id="sendBtn">
           <svg viewBox="0 0 24 24" width="24" height="24"><path fill="currentColor" d="M2.01 21L23 12 2.01 3 2 10l15 2-15 2z"/></svg>
         </button>
       </div>
@@ -171,9 +195,17 @@ function openConversation(id) {
   sendBtn = document.getElementById('sendBtn');
   welcome = document.getElementById('welcome');
   
-  // 渲染消息
-  renderMessages();
-  userInput.focus();
+  // 绑定按钮事件
+  const backBtn = document.getElementById('backBtn');
+  if (backBtn) backBtn.addEventListener('click', showConversationList);
+  
+  const clearBtn = document.getElementById('clearBtn');
+  if (clearBtn) clearBtn.addEventListener('click', clearCurrentChat);
+  
+  // 绑定输入事件
+  userInput.addEventListener('keydown', handleKeyDown);
+  userInput.addEventListener('input', (e) => autoResize(e.target));
+  sendBtn.addEventListener('click', sendMessage);
   
   // 绑定快捷按钮事件
   document.querySelectorAll('.quick-btn').forEach(btn => {
@@ -183,6 +215,10 @@ function openConversation(id) {
       sendMessage();
     });
   });
+  
+  // 渲染消息
+  renderMessages();
+  userInput.focus();
 }
 
 // 删除对话
@@ -424,17 +460,17 @@ function renderMessages() {
     
     const actions = isUser 
       ? `<div class="message-actions">
-          <button class="action-btn copy-btn" onclick="copyMessage(${index})" title="复制">${copyIcon}</button>
-          <button class="action-btn delete-btn" onclick="deleteMessage(${index})" title="删除">
+          <button class="action-btn copy-btn" data-index="${index}" title="复制">${copyIcon}</button>
+          <button class="action-btn delete-btn" data-index="${index}" title="删除">
             <svg viewBox="0 0 24 24" width="16" height="16"><path fill="currentColor" d="M6 19c0 1.1.9 2 2 2h8c1.1 0 2-.9 2-2V7H6v12zM19 4h-3.5l-1-1h-5l-1 1H5v2h14V4z"/></svg>
           </button>
         </div>`
       : `<div class="message-actions">
-          <button class="action-btn copy-btn" onclick="copyMessage(${index})" title="复制">${copyIcon}</button>
-          <button class="action-btn regenerate-btn" onclick="regenerate(${index})" title="重新生成">
+          <button class="action-btn copy-btn" data-index="${index}" title="复制">${copyIcon}</button>
+          <button class="action-btn regenerate-btn" data-index="${index}" title="重新生成">
             <svg viewBox="0 0 24 24" width="16" height="16"><path fill="currentColor" d="M17.65 6.35C16.2 4.9 14.21 4 12 4c-4.42 0-7.99 3.58-7.99 8s3.57 8 7.99 8c3.73 0 6.84-2.55 7.73-6h-2.08c-.82 2.33-3.04 4-5.65 4-3.31 0-6-2.69-6-6s2.69-6 6-6c1.66 0 3.14.69 4.22 1.78L13 11h7V4l-2.35 2.35z"/></svg>
           </button>
-          <button class="action-btn delete-btn" onclick="deleteMessage(${index})" title="删除">
+          <button class="action-btn delete-btn" data-index="${index}" title="删除">
             <svg viewBox="0 0 24 24" width="16" height="16"><path fill="currentColor" d="M6 19c0 1.1.9 2 2 2h8c1.1 0 2-.9 2-2V7H6v12zM19 4h-3.5l-1-1h-5l-1 1H5v2h14V4z"/></svg>
           </button>
         </div>`;
@@ -450,6 +486,17 @@ function renderMessages() {
     `;
   }).join('');
 
+  // 绑定消息操作按钮事件（事件委托）
+  messagesDiv.querySelectorAll('.copy-btn').forEach(btn => {
+    btn.addEventListener('click', () => copyMessage(parseInt(btn.dataset.index)));
+  });
+  messagesDiv.querySelectorAll('.regenerate-btn').forEach(btn => {
+    btn.addEventListener('click', () => regenerate(parseInt(btn.dataset.index)));
+  });
+  messagesDiv.querySelectorAll('.delete-btn').forEach(btn => {
+    btn.addEventListener('click', () => deleteMessage(parseInt(btn.dataset.index)));
+  });
+
   scrollToBottom();
 }