feat: AI对话助手移动端应用

- 智谱 GLM-4.5-Air 大模型接口 - 移动端优化聊天界面 - Capacitor 支持 Android/iOS 打包 - PWA 配置，可添加到主屏幕 - 多对话管理 - 流式输出 - Markdown格式显示 - 复制、重新生成、删除功能 - 端口: 19021
2026-04-25 23:29:41 +08:00
commit 47a46bd5ea
8 changed files with 1295 additions and 0 deletions
--- a/www/app.js
+++ b/www/app.js
@@ -0,0 +1,515 @@
+// AI助手 - 前端应用
+// 使用智谱 GLM-4.5-Air 模型（流式输出 + 多对话管理）
+
+const CONFIG = {
+  apiUrl: 'https://open.bigmodel.cn/api/paas/v4/chat/completions',
+  apiKey: '2259e33a1357460abe17919aaf81e73d.K44a8LPQTmFM5PKm',
+  model: 'glm-4.5-air',
+  maxTokens: 2048
+};
+
+// 数据结构
+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');
+
+// 初始化
+document.addEventListener('DOMContentLoaded', () => {
+  // 从本地存储加载对话列表
+  const saved = localStorage.getItem('conversations');
+  if (saved) {
+    conversations = JSON.parse(saved);
+  }
+  
+  // 兼容旧数据格式（chat_history）
+  const oldHistory = localStorage.getItem('chat_history');
+  if (oldHistory && conversations.length === 0) {
+    const oldMessages = JSON.parse(oldHistory);
+    if (oldMessages.length > 0) {
+      // 转换旧数据为新格式
+      const convertedConv = {
+        id: Date.now().toString(),
+        title: oldMessages[0].content.slice(0, 30) + (oldMessages[0].content.length > 30 ? '...' : ''),
+        messages: oldMessages,
+        createdAt: Date.now(),
+        updatedAt: Date.now()
+      };
+      conversations.push(convertedConv);
+      saveConversations();
+      localStorage.removeItem('chat_history');  // 清理旧数据
+    }
+  }
+  
+  // 显示对话列表页面
+  showConversationList();
+});
+
+// ==================== 对话列表页面 ====================
+
+function showConversationList() {
+  currentConversation = null;
+  
+  // 渲染对话列表
+  const listHtml = `
+    <div class="conversation-list-page">
+      <header class="list-header">
+        <div class="header-title">
+          <span class="logo">🤖</span>
+          <h1>AI助手</h1>
+        </div>
+      </header>
+      
+      <div class="list-content">
+        <button class="new-chat-btn" onclick="createNewConversation()">
+          <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">
+          ${conversations.length === 0 
+            ? '<div class="empty-list">暂无对话记录</div>'
+            : conversations.map(conv => `
+              <div class="conversation-item" onclick="openConversation('${conv.id}')">
+                <div class="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">
+                  <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>
+            `).join('')
+          }
+        </div>
+      </div>
+    </div>
+  `;
+  
+  appContainer.innerHTML = listHtml;
+}
+
+// 创建新对话
+function createNewConversation() {
+  const newConv = {
+    id: Date.now().toString(),
+    title: '新对话',
+    messages: [],
+    createdAt: Date.now(),
+    updatedAt: Date.now()
+  };
+  
+  conversations.unshift(newConv);
+  saveConversations();
+  openConversation(newConv.id);
+}
+
+// 打开对话
+function openConversation(id) {
+  currentConversation = conversations.find(c => c.id === id);
+  if (!currentConversation) {
+    showConversationList();
+    return;
+  }
+  
+  // 渲染对话页面
+  const chatHtml = `
+    <div id="chatPage">
+      <header class="header">
+        <button class="back-btn" onclick="showConversationList()">
+          <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>${escapeHtml(currentConversation.title)}</h1>
+        </div>
+        <button class="clear-btn" onclick="clearCurrentChat()" title="清空对话">
+          <svg viewBox="0 0 24 24" width="20" height="20"><path fill="currentColor" d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12 19 6.41z"/></svg>
+        </button>
+      </header>
+
+      <div class="messages-container" id="messagesContainer">
+        <div class="welcome" id="welcome" style="${currentConversation.messages.length > 0 ? 'display:none' : ''}">
+          <div class="welcome-icon">👋</div>
+          <h2>你好！我是AI助手</h2>
+          <p>有什么可以帮助你的吗？</p>
+          <div class="quick-actions">
+            <button class="quick-btn" data-text="介绍一下你自己">介绍一下你自己</button>
+            <button class="quick-btn" data-text="帮我写一段代码">帮我写代码</button>
+            <button class="quick-btn" data-text="解释一个概念">解释概念</button>
+          </div>
+        </div>
+        <div class="messages" id="messages"></div>
+      </div>
+
+      <div class="input-area">
+        <textarea 
+          id="userInput" 
+          placeholder="输入消息..." 
+          rows="1"
+          onkeydown="handleKeyDown(event)"
+          oninput="autoResize(this)"
+        ></textarea>
+        <button class="send-btn" onclick="sendMessage()" 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>
+    </div>
+  `;
+  
+  appContainer.innerHTML = chatHtml;
+  
+  // 重新获取 DOM 元素
+  messagesContainer = document.getElementById('messagesContainer');
+  messagesDiv = document.getElementById('messages');
+  userInput = document.getElementById('userInput');
+  sendBtn = document.getElementById('sendBtn');
+  welcome = document.getElementById('welcome');
+  
+  // 渲染消息
+  renderMessages();
+  userInput.focus();
+  
+  // 绑定快捷按钮事件
+  document.querySelectorAll('.quick-btn').forEach(btn => {
+    btn.addEventListener('click', () => {
+      const text = btn.getAttribute('data-text');
+      userInput.value = text;
+      sendMessage();
+    });
+  });
+}
+
+// 删除对话
+function deleteConversation(id) {
+  if (!confirm('确定要删除这个对话吗？')) return;
+  
+  conversations = conversations.filter(c => c.id !== id);
+  saveConversations();
+  showConversationList();
+}
+
+// ==================== 对话页面 ====================
+
+// 自动调整输入框高度
+function autoResize(textarea) {
+  textarea.style.height = 'auto';
+  textarea.style.height = Math.min(textarea.scrollHeight, 120) + 'px';
+}
+
+// 处理键盘事件
+function handleKeyDown(event) {
+  if (event.key === 'Enter' && !event.shiftKey) {
+    event.preventDefault();
+    sendMessage();
+  }
+}
+
+// 发送快捷消息
+function sendQuickMessage(text) {
+  userInput.value = text;
+  sendMessage();
+}
+
+// 发送消息（流式输出）
+async function sendMessage() {
+  if (!currentConversation) return;
+  
+  const text = userInput.value.trim();
+  if (!text || isLoading) return;
+
+  // 隐藏欢迎界面
+  welcome.style.display = 'none';
+
+  // 添加用户消息
+  currentConversation.messages.push({ role: 'user', content: text });
+  
+  // 更新对话标题（第一条用户消息）
+  if (currentConversation.title === '新对话') {
+    currentConversation.title = text.slice(0, 30) + (text.length > 30 ? '...' : '');
+    // 更新标题显示
+    const titleEl = document.querySelector('.header h1');
+    if (titleEl) {
+      titleEl.textContent = currentConversation.title;
+    }
+  }
+  
+  currentConversation.updatedAt = Date.now();
+  saveConversations();
+  
+  renderMessages();
+  userInput.value = '';
+  autoResize(userInput);
+
+  // 调用流式生成
+  await streamGenerate(currentConversation.messages.length - 1);
+}
+
+// 流式生成 AI 回复
+async function streamGenerate(userMsgIndex) {
+  isLoading = true;
+  sendBtn.disabled = true;
+
+  const aiMessageIndex = currentConversation.messages.length;
+  currentConversation.messages.push({ role: 'assistant', content: '' });
+  renderMessages();
+  
+  const lastMessageEl = messagesDiv.lastElementChild;
+  const contentEl = lastMessageEl.querySelector('.message-content');
+  contentEl.innerHTML = '<span class="streaming-cursor">▌</span>';
+
+  try {
+    const response = await fetch(CONFIG.apiUrl, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+        'Authorization': `Bearer ${CONFIG.apiKey}`
+      },
+      body: JSON.stringify({
+        model: CONFIG.model,
+        messages: currentConversation.messages.slice(0, aiMessageIndex).map(m => ({
+          role: m.role,
+          content: m.content
+        })),
+        max_tokens: CONFIG.maxTokens,
+        stream: true
+      })
+    });
+
+    if (!response.ok) {
+      throw new Error(`API 错误: ${response.status}`);
+    }
+
+    const reader = response.body.getReader();
+    const decoder = new TextDecoder();
+    let buffer = '';
+
+    while (true) {
+      const { done, value } = await reader.read();
+      if (done) break;
+
+      buffer += decoder.decode(value, { stream: true });
+      const lines = buffer.split('\n');
+      buffer = lines.pop() || '';
+
+      for (const line of lines) {
+        if (line.startsWith('data: ')) {
+          const jsonStr = line.slice(6).trim();
+          if (jsonStr === '[DONE]') continue;
+          
+          try {
+            const data = JSON.parse(jsonStr);
+            if (data.choices && data.choices[0]?.delta?.content) {
+              currentConversation.messages[aiMessageIndex].content += data.choices[0].delta.content;
+              contentEl.innerHTML = renderMarkdown(currentConversation.messages[aiMessageIndex].content) + '<span class="streaming-cursor">▌</span>';
+              scrollToBottom();
+            }
+          } catch (e) {}
+        }
+      }
+    }
+
+    contentEl.innerHTML = renderMarkdown(currentConversation.messages[aiMessageIndex].content);
+
+  } catch (error) {
+    console.error('Error:', error);
+    currentConversation.messages[aiMessageIndex].content = `抱歉，出现了错误：${error.message}\n\n请检查网络连接后重试。`;
+    contentEl.innerHTML = renderMarkdown(currentConversation.messages[aiMessageIndex].content);
+  } finally {
+    isLoading = false;
+    sendBtn.disabled = false;
+    currentConversation.updatedAt = Date.now();
+    saveConversations();
+    renderMessages();
+  }
+}
+
+// 重新生成 AI 回复
+async function regenerate(index) {
+  if (!currentConversation || isLoading || index < 1) return;
+  
+  const userMsgIndex = index - 1;
+  if (currentConversation.messages[userMsgIndex].role !== 'user') return;
+  
+  currentConversation.messages.splice(index, 1);
+  currentConversation.updatedAt = Date.now();
+  saveConversations();
+  
+  await streamGenerate(userMsgIndex);
+}
+
+// 删除消息
+function deleteMessage(index) {
+  if (!currentConversation || isLoading) return;
+  
+  const msg = currentConversation.messages[index];
+  
+  if (msg.role === 'assistant') {
+    if (index > 0 && currentConversation.messages[index - 1].role === 'user') {
+      currentConversation.messages.splice(index - 1, 2);
+    } else {
+      currentConversation.messages.splice(index, 1);
+    }
+  } else {
+    if (index < currentConversation.messages.length - 1 && currentConversation.messages[index + 1].role === 'assistant') {
+      currentConversation.messages.splice(index, 2);
+    } else {
+      currentConversation.messages.splice(index, 1);
+    }
+  }
+  
+  currentConversation.updatedAt = Date.now();
+  saveConversations();
+  renderMessages();
+  
+  if (currentConversation.messages.length === 0) {
+    welcome.style.display = 'block';
+  }
+}
+
+// 复制消息（复制原文）
+function copyMessage(index) {
+  if (!currentConversation) return;
+  
+  const content = currentConversation.messages[index].content;
+  
+  navigator.clipboard.writeText(content).then(() => {
+    showToast('已复制到剪贴板');
+  }).catch(err => {
+    const textarea = document.createElement('textarea');
+    textarea.value = content;
+    textarea.style.position = 'fixed';
+    textarea.style.opacity = '0';
+    document.body.appendChild(textarea);
+    textarea.select();
+    document.execCommand('copy');
+    document.body.removeChild(textarea);
+    showToast('已复制到剪贴板');
+  });
+}
+
+// 清空当前对话
+function clearCurrentChat() {
+  if (!currentConversation) return;
+  
+  if (confirm('确定要清空当前对话吗？')) {
+    currentConversation.messages = [];
+    currentConversation.updatedAt = Date.now();
+    saveConversations();
+    renderMessages();
+    welcome.style.display = 'block';
+  }
+}
+
+// 渲染消息
+function renderMessages() {
+  if (!currentConversation) return;
+  
+  messagesDiv.innerHTML = currentConversation.messages.map((msg, index) => {
+    const isUser = msg.role === 'user';
+    const avatar = isUser ? '👤' : '🤖';
+    const content = renderMarkdown(msg.content);
+    
+    const copyIcon = `<svg viewBox="0 0 24 24" width="16" height="16"><path fill="currentColor" d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"/></svg>`;
+    
+    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(${index})" title="删除">
+            <svg viewBox="0 0 24 24" width="16" height="16"><path fill="currentColor" d="M6 19c0 1.1.9 2 2 2h8c1.1 0 2-.9 2-2V7H6v12zM19 4h-3.5l-1-1h-5l-1 1H5v2h14V4z"/></svg>
+          </button>
+        </div>`
+      : `<div class="message-actions">
+          <button class="action-btn copy-btn" onclick="copyMessage(${index})" title="复制">${copyIcon}</button>
+          <button class="action-btn regenerate-btn" onclick="regenerate(${index})" title="重新生成">
+            <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">
+            <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>`;
+    
+    return `
+      <div class="message ${msg.role}" data-index="${index}">
+        <div class="message-avatar">${avatar}</div>
+        <div class="message-body">
+          <div class="message-content">${content}</div>
+          ${actions}
+        </div>
+      </div>
+    `;
+  }).join('');
+
+  scrollToBottom();
+}
+
+// ==================== 工具函数 ====================
+
+// 渲染 Markdown
+function renderMarkdown(text) {
+  if (!text) return '';
+  
+  marked.setOptions({
+    breaks: true,
+    gfm: true
+  });
+  
+  return marked.parse(text);
+}
+
+// 滚动到底部
+function scrollToBottom() {
+  if (messagesContainer) {
+    messagesContainer.scrollTop = messagesContainer.scrollHeight;
+  }
+}
+
+// 保存对话列表
+function saveConversations() {
+  localStorage.setItem('conversations', JSON.stringify(conversations));
+}
+
+// 显示提示
+function showToast(message) {
+  const toast = document.createElement('div');
+  toast.className = 'toast';
+  toast.textContent = message;
+  document.body.appendChild(toast);
+  
+  setTimeout(() => toast.classList.add('show'), 10);
+  setTimeout(() => {
+    toast.classList.remove('show');
+    setTimeout(() => document.body.removeChild(toast), 300);
+  }, 2000);
+}
+
+// HTML转义
+function escapeHtml(text) {
+  const div = document.createElement('div');
+  div.textContent = text;
+  return div.innerHTML;
+}
+
+// 格式化时间
+function formatTime(timestamp) {
+  const date = new Date(timestamp);
+  const now = new Date();
+  const diff = now - date;
+  
+  if (diff < 60000) return '刚刚';
+  if (diff < 3600000) return Math.floor(diff / 60000) + '分钟前';
+  if (diff < 86400000) return Math.floor(diff / 3600000) + '小时前';
+  if (diff < 604800000) return Math.floor(diff / 86400000) + '天前';
+  
+  return date.toLocaleDateString('zh-CN');
+}
+
+// PWA 注册
+if ('serviceWorker' in navigator) {
+  navigator.serviceWorker.register('sw.js').catch(() => {});
+}
--- a/www/index.html
+++ b/www/index.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+  <meta name="theme-color" content="#667eea">
+  <title>AI助手</title>
+  <link rel="stylesheet" href="style.css">
+  <link rel="manifest" href="manifest.json">
+</head>
+<body>
+  <div id="app"></div>
+  <script src="marked.min.js"></script>
+  <script src="app.js"></script>
+</body>
+</html>
--- a/www/manifest.json
+++ b/www/manifest.json
@@ -0,0 +1,22 @@
+{
+  "name": "AI助手",
+  "short_name": "AI助手",
+  "description": "AI对话助手移动端应用",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#f7fafc",
+  "theme_color": "#667eea",
+  "orientation": "portrait",
+  "icons": [
+    {
+      "src": "icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ]
+}
--- a/www/marked.min.js
+++ b/www/marked.min.js
--- a/www/style.css
+++ b/www/style.css
@@ -0,0 +1,582 @@
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+:root {
+  --primary: #667eea;
+  --primary-dark: #5a67d8;
+  --bg-color: #f7fafc;
+  --card-bg: #ffffff;
+  --text-color: #2d3748;
+  --text-light: #718096;
+  --border-color: #e2e8f0;
+  --user-msg: #667eea;
+  --ai-msg: #f7fafc;
+  --shadow: 0 2px 8px rgba(0,0,0,0.1);
+}
+
+body {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+  background: var(--bg-color);
+  color: var(--text-color);
+  line-height: 1.6;
+}
+
+#app {
+  min-height: 100vh;
+  min-height: 100dvh;
+}
+
+/* ==================== 对话列表页面 ==================== */
+
+.conversation-list-page {
+  display: flex;
+  flex-direction: column;
+  min-height: 100vh;
+  min-height: 100dvh;
+  background: var(--card-bg);
+}
+
+.list-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 12px 16px;
+  background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
+  color: white;
+  position: sticky;
+  top: 0;
+  z-index: 100;
+}
+
+.list-header .header-title {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.list-header .logo {
+  font-size: 24px;
+}
+
+.list-header h1 {
+  font-size: 18px;
+  font-weight: 600;
+}
+
+.list-content {
+  flex: 1;
+  padding: 16px;
+  overflow-y: auto;
+}
+
+.new-chat-btn {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 12px 20px;
+  background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
+  color: white;
+  border: none;
+  border-radius: 12px;
+  font-size: 16px;
+  cursor: pointer;
+  margin-bottom: 16px;
+  transition: transform 0.2s;
+}
+
+.new-chat-btn:active {
+  transform: scale(0.98);
+}
+
+.conversation-list {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.empty-list {
+  text-align: center;
+  padding: 40px;
+  color: var(--text-light);
+}
+
+.conversation-item {
+  display: flex;
+  flex-direction: column;
+  padding: 12px 16px;
+  background: white;
+  border: 1px solid var(--border-color);
+  border-radius: 12px;
+  cursor: pointer;
+  transition: all 0.2s;
+  position: relative;
+}
+
+.conversation-item:hover {
+  border-color: var(--primary);
+  background: rgba(102, 126, 234, 0.05);
+}
+
+.conversation-item:active {
+  background: rgba(102, 126, 234, 0.1);
+}
+
+.conv-title {
+  font-size: 16px;
+  font-weight: 500;
+  color: var(--text-color);
+  margin-bottom: 4px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.conv-meta {
+  font-size: 12px;
+  color: var(--text-light);
+}
+
+.conv-delete-btn {
+  position: absolute;
+  right: 12px;
+  top: 50%;
+  transform: translateY(-50%);
+  background: transparent;
+  border: none;
+  color: var(--text-light);
+  padding: 6px;
+  cursor: pointer;
+  opacity: 0;
+  transition: all 0.2s;
+}
+
+.conversation-item:hover .conv-delete-btn {
+  opacity: 1;
+}
+
+.conv-delete-btn:hover {
+  color: #e53e3e;
+}
+
+/* ==================== 对话页面 ==================== */
+
+#chatPage {
+  display: flex;
+  flex-direction: column;
+  height: 100vh;
+  height: 100dvh;
+  max-width: 800px;
+  margin: 0 auto;
+  background: var(--card-bg);
+  box-shadow: var(--shadow);
+}
+
+.header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 12px 16px;
+  background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
+  color: white;
+  position: sticky;
+  top: 0;
+  z-index: 100;
+}
+
+.back-btn {
+  background: transparent;
+  border: none;
+  color: white;
+  padding: 8px;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+}
+
+.back-btn:active {
+  opacity: 0.8;
+}
+
+.header-title {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  flex: 1;
+  margin-left: 8px;
+}
+
+.header-title h1 {
+  font-size: 16px;
+  font-weight: 600;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.logo {
+  font-size: 20px;
+}
+
+.clear-btn {
+  background: rgba(255,255,255,0.2);
+  border: none;
+  border-radius: 8px;
+  padding: 8px;
+  color: white;
+  cursor: pointer;
+}
+
+.clear-btn:active {
+  background: rgba(255,255,255,0.3);
+}
+
+.messages-container {
+  flex: 1;
+  overflow-y: auto;
+  padding: 16px;
+  -webkit-overflow-scrolling: touch;
+}
+
+.welcome {
+  text-align: center;
+  padding: 40px 20px;
+}
+
+.welcome-icon {
+  font-size: 48px;
+  margin-bottom: 16px;
+}
+
+.welcome h2 {
+  font-size: 20px;
+  margin-bottom: 8px;
+}
+
+.welcome p {
+  color: var(--text-light);
+  margin-bottom: 24px;
+}
+
+.quick-actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  justify-content: center;
+}
+
+.quick-actions button {
+  padding: 8px 16px;
+  border: 1px solid var(--primary);
+  background: white;
+  color: var(--primary);
+  border-radius: 20px;
+  font-size: 14px;
+  cursor: pointer;
+}
+
+.quick-actions button:active {
+  background: var(--primary);
+  color: white;
+}
+
+.messages {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+
+.message {
+  display: flex;
+  gap: 12px;
+  animation: fadeIn 0.3s ease;
+}
+
+@keyframes fadeIn {
+  from { opacity: 0; transform: translateY(10px); }
+  to { opacity: 1; transform: translateY(0); }
+}
+
+.message.user {
+  flex-direction: row-reverse;
+}
+
+.message-avatar {
+  width: 36px;
+  height: 36px;
+  border-radius: 50%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 18px;
+  flex-shrink: 0;
+}
+
+.message.user .message-avatar {
+  background: var(--user-msg);
+  color: white;
+}
+
+.message.assistant .message-avatar {
+  background: var(--primary);
+  color: white;
+}
+
+.message-content {
+  padding: 12px 16px;
+  border-radius: 18px;
+  word-wrap: break-word;
+}
+
+.message.user .message-content {
+  background: var(--user-msg);
+  color: white;
+  border-bottom-right-radius: 4px;
+}
+
+.message.assistant .message-content {
+  background: var(--ai-msg);
+  color: var(--text-color);
+  border-bottom-left-radius: 4px;
+  border: 1px solid var(--border-color);
+}
+
+.message-content code {
+  background: rgba(0,0,0,0.1);
+  padding: 2px 6px;
+  border-radius: 4px;
+  font-family: 'Monaco', 'Menlo', monospace;
+  font-size: 0.9em;
+}
+
+.message-content pre {
+  background: #1a1a2e;
+  color: #eee;
+  padding: 12px;
+  border-radius: 8px;
+  overflow-x: auto;
+  margin: 8px 0;
+}
+
+.message-content pre code {
+  background: transparent;
+  padding: 0;
+}
+
+.message.user .message-content pre {
+  background: rgba(0,0,0,0.2);
+}
+
+/* 流式输出光标 */
+.streaming-cursor {
+  animation: blink 1s infinite;
+  color: var(--primary);
+  font-weight: bold;
+}
+
+@keyframes blink {
+  0%, 50% { opacity: 1; }
+  51%, 100% { opacity: 0; }
+}
+
+/* 消息结构 */
+.message-body {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.message.user .message-body {
+  max-width: 85%;
+}
+
+.message.assistant .message-body {
+  max-width: 80%;
+}
+
+/* 消息操作按钮 */
+.message-actions {
+  display: flex;
+  gap: 6px;
+  opacity: 0;
+  transition: opacity 0.2s;
+}
+
+.message:hover .message-actions {
+  opacity: 1;
+}
+
+.action-btn {
+  background: transparent;
+  border: 1px solid var(--border-color);
+  border-radius: 6px;
+  padding: 4px 6px;
+  color: var(--text-light);
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.action-btn:hover {
+  background: var(--border-color);
+  color: var(--text-color);
+}
+
+.action-btn.copy-btn:hover {
+  background: #dbeafe;
+  border-color: var(--primary);
+  color: var(--primary);
+}
+
+.action-btn.delete-btn:hover {
+  background: #fee2e2;
+  border-color: #e53e3e;
+  color: #e53e3e;
+}
+
+.action-btn.regenerate-btn:hover {
+  background: #dbeafe;
+  border-color: var(--primary);
+  color: var(--primary);
+}
+
+/* Markdown 内容样式 */
+.message-content h1, .message-content h2, .message-content h3 {
+  margin: 12px 0 8px;
+  font-weight: 600;
+}
+
+.message-content h1 { font-size: 1.3em; }
+.message-content h2 { font-size: 1.2em; }
+.message-content h3 { font-size: 1.1em; }
+
+.message-content ul, .message-content ol {
+  margin: 8px 0;
+  padding-left: 20px;
+}
+
+.message-content li {
+  margin: 4px 0;
+}
+
+.message-content strong {
+  font-weight: 600;
+}
+
+.message-content em {
+  font-style: italic;
+}
+
+.message-content a {
+  color: var(--primary);
+  text-decoration: underline;
+}
+
+.message-content blockquote {
+  margin: 8px 0;
+  padding: 8px 12px;
+  border-left: 3px solid var(--primary);
+  background: rgba(102, 126, 234, 0.1);
+  border-radius: 4px;
+}
+
+.message-content table {
+  margin: 8px 0;
+  border-collapse: collapse;
+  width: 100%;
+}
+
+.message-content th, .message-content td {
+  border: 1px solid var(--border-color);
+  padding: 6px 10px;
+  text-align: left;
+}
+
+.message-content th {
+  background: var(--bg-color);
+  font-weight: 600;
+}
+
+/* 输入区域 */
+.input-area {
+  display: flex;
+  gap: 10px;
+  padding: 12px 16px;
+  background: white;
+  border-top: 1px solid var(--border-color);
+  position: sticky;
+  bottom: 0;
+}
+
+#userInput {
+  flex: 1;
+  padding: 12px 16px;
+  border: 2px solid var(--border-color);
+  border-radius: 24px;
+  font-size: 16px;
+  resize: none;
+  outline: none;
+  font-family: inherit;
+  max-height: 120px;
+  transition: border-color 0.2s;
+}
+
+#userInput:focus {
+  border-color: var(--primary);
+}
+
+.send-btn {
+  width: 48px;
+  height: 48px;
+  border-radius: 50%;
+  background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
+  border: none;
+  color: white;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: transform 0.2s, opacity 0.2s;
+  flex-shrink: 0;
+}
+
+.send-btn:active {
+  transform: scale(0.95);
+}
+
+.send-btn:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+/* Toast 提示 */
+.toast {
+  position: fixed;
+  top: 80px;
+  left: 50%;
+  transform: translateX(-50%) translateY(-20px);
+  background: var(--text-color);
+  color: white;
+  padding: 12px 24px;
+  border-radius: 8px;
+  font-size: 14px;
+  opacity: 0;
+  transition: all 0.3s ease;
+  z-index: 1000;
+  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
+}
+
+.toast.show {
+  opacity: 1;
+  transform: translateX(-50%) translateY(0);
+}
+
+/* 安全区域适配（刘海屏） */
+@supports (padding: env(safe-area-inset-bottom)) {
+  .input-area {
+    padding-bottom: calc(12px + env(safe-area-inset-bottom));
+  }
+}