feat: 后台管理添加用户管理功能 + 前端用户注册登录调用backend API

backend/app.py

@@ -147,6 +147,25 @@ def init_db():
         )
     ''')
     
+    # 用户表（前端注册用户）
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS users (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            username TEXT NOT NULL UNIQUE,
+            password_hash TEXT NOT NULL,
+            phone TEXT NOT NULL UNIQUE,
+            email TEXT,
+            avatar TEXT DEFAULT '👤',
+            signature TEXT,
+            gender TEXT,
+            age INTEGER,
+            region TEXT,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            last_login_at TIMESTAMP
+        )
+    ''')
+    
     # 初始化默认大模型配置
     cursor.execute('SELECT COUNT(*) FROM llm_configs')
     if cursor.fetchone()[0] == 0:
@@ -295,6 +314,273 @@ def admin_login():
         return jsonify({'error': '用户名或密码错误'}), 401
 
 
+# ==================== 用户管理 ====================
+
+@app.route('/api/register', methods=['POST'])
+def user_register():
+    """用户注册"""
+    data = request.json
+    username = data.get('username')
+    password = data.get('password')
+    phone = data.get('phone')
+    email = data.get('email')
+    code = data.get('code')  # 验证码（暂时只校验格式）
+    
+    # 参数验证
+    if not username or not password or not phone:
+        return jsonify({'error': '请填写完整信息'}), 400
+    
+    # 用户名长度检查
+    if len(username) < 2 or len(username) > 20:
+        return jsonify({'error': '用户名长度应为2-20字符'}), 400
+    
+    # 手机号格式检查
+    import re
+    if not re.match(r'^1[3-9]\d{9}$', phone):
+        return jsonify({'error': '手机号格式不正确'}), 400
+    
+    # 验证码检查（模拟，6位数字）
+    if not code or not re.match(r'^\d{6}$', code):
+        return jsonify({'error': '验证码格式不正确'}), 400
+    
+    # 邮箱格式检查（可选）
+    if email and not re.match(r'^[^\s@]+@[^\s@]+\.[^\s@]+$', email):
+        return jsonify({'error': '邮箱格式不正确'}), 400
+    
+    conn = get_db()
+    cursor = conn.cursor()
+    
+    # 检查用户名是否已存在
+    cursor.execute('SELECT id FROM users WHERE username = ?', (username,))
+    if cursor.fetchone():
+        conn.close()
+        return jsonify({'error': '用户名已存在'}), 400
+    
+    # 检查手机号是否已存在
+    cursor.execute('SELECT id FROM users WHERE phone = ?', (phone,))
+    if cursor.fetchone():
+        conn.close()
+        return jsonify({'error': '手机号已注册'}), 400
+    
+    # 创建用户
+    password_hash = hashlib.sha256(password.encode()).hexdigest()
+    cursor.execute('''
+        INSERT INTO users (username, password_hash, phone, email)
+        VALUES (?, ?, ?, ?)
+    ''', (username, password_hash, phone, email))
+    
+    # 记录注册统计
+    cursor.execute('INSERT INTO stats_logs (log_type, log_key) VALUES (?, ?)', ('user_register', 'new'))
+    
+    conn.commit()
+    user_id = cursor.lastrowid
+    conn.close()
+    
+    return jsonify({'success': True, 'user_id': user_id})
+
+
+@app.route('/api/login', methods=['POST'])
+def user_login():
+    """用户登录"""
+    data = request.json
+    username = data.get('username')
+    password = data.get('password')
+    
+    if not username or not password:
+        return jsonify({'error': '请输入用户名和密码'}), 400
+    
+    password_hash = hashlib.sha256(password.encode()).hexdigest()
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('SELECT * FROM users WHERE username = ? AND password_hash = ?', (username, password_hash))
+    user = cursor.fetchone()
+    
+    if user:
+        # 更新最后登录时间
+        cursor.execute('UPDATE users SET last_login_at = CURRENT_TIMESTAMP WHERE id = ?', (user['id'],))
+        conn.commit()
+        conn.close()
+        return jsonify({
+            'success': True,
+            'user': {
+                'id': user['id'],
+                'username': user['username'],
+                'phone': user['phone'],
+                'email': user['email'],
+                'avatar': user['avatar'],
+                'signature': user['signature'],
+                'gender': user['gender'],
+                'age': user['age'],
+                'region': user['region']
+            }
+        })
+    else:
+        conn.close()
+        return jsonify({'error': '用户名或密码错误'}), 401
+
+
+@app.route('/api/admin/users', methods=['GET'])
+def get_users():
+    """获取用户列表"""
+    conn = get_db()
+    cursor = conn.cursor()
+    
+    # 支持搜索
+    search = request.args.get('search', '')
+    if search:
+        cursor.execute('''
+            SELECT id, username, phone, email, avatar, signature, gender, age, region, 
+            created_at, last_login_at FROM users 
+            WHERE username LIKE ? OR phone LIKE ? OR email LIKE ?
+            ORDER BY created_at DESC
+        ''', (f'%{search}%', f'%{search}%', f'%{search}%'))
+    else:
+        cursor.execute('''
+            SELECT id, username, phone, email, avatar, signature, gender, age, region, 
+            created_at, last_login_at FROM users ORDER BY created_at DESC
+        ''')
+    
+    users = [dict(row) for row in cursor.fetchall()]
+    conn.close()
+    return jsonify(users)
+
+
+@app.route('/api/admin/users/<int:id>', methods=['GET'])
+def get_user(id):
+    """获取单个用户"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('SELECT * FROM users WHERE id = ?', (id,))
+    user = cursor.fetchone()
+    conn.close()
+    
+    if user:
+        return jsonify(dict(user))
+    else:
+        return jsonify({'error': '用户不存在'}), 404
+
+
+@app.route('/api/admin/users/<int:id>', methods=['PUT'])
+def update_user(id):
+    """更新用户信息"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    
+    # 检查用户是否存在
+    cursor.execute('SELECT id FROM users WHERE id = ?', (id,))
+    if not cursor.fetchone():
+        conn.close()
+        return jsonify({'error': '用户不存在'}), 404
+    
+    # 检查用户名是否重复（如果要修改用户名）
+    if data.get('username'):
+        cursor.execute('SELECT id FROM users WHERE username = ? AND id != ?', (data['username'], id))
+        if cursor.fetchone():
+            conn.close()
+            return jsonify({'error': '用户名已存在'}), 400
+    
+    # 更新用户信息
+    cursor.execute('''
+        UPDATE users SET username=?, email=?, avatar=?, signature=?, gender=?, age=?, region=?, 
+        updated_at=CURRENT_TIMESTAMP WHERE id=?
+    ''', (data.get('username'), data.get('email'), data.get('avatar', '👤'), 
+          data.get('signature'), data.get('gender'), data.get('age'), 
+          data.get('region'), id))
+    
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/admin/users/<int:id>', methods=['DELETE'])
+def delete_user(id):
+    """删除用户"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('DELETE FROM users WHERE id = ?', (id,))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/admin/users/<int:id>/password', methods=['PUT'])
+def reset_user_password(id):
+    """重置用户密码"""
+    data = request.json
+    new_password = data.get('password')
+    
+    if not new_password or len(new_password) < 6:
+        return jsonify({'error': '密码长度至少6位'}), 400
+    
+    password_hash = hashlib.sha256(new_password.encode()).hexdigest()
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('UPDATE users SET password_hash=?, updated_at=CURRENT_TIMESTAMP WHERE id=?', 
+                   (password_hash, id))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/user/<int:id>', methods=['PUT'])
+def update_user_profile(id):
+    """用户更新自己的资料"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    
+    # 检查用户是否存在
+    cursor.execute('SELECT id FROM users WHERE id = ?', (id,))
+    if not cursor.fetchone():
+        conn.close()
+        return jsonify({'error': '用户不存在'}), 404
+    
+    # 更新用户资料
+    cursor.execute('''
+        UPDATE users SET avatar=?, signature=?, gender=?, age=?, region=?, email=?, 
+        updated_at=CURRENT_TIMESTAMP WHERE id=?
+    ''', (data.get('avatar', '👤'), data.get('signature'), data.get('gender'), 
+          data.get('age'), data.get('region'), data.get('email'), id))
+    
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/user/<int:id>/password', methods=['PUT'])
+def change_user_password(id):
+    """用户修改自己的密码"""
+    data = request.json
+    old_password = data.get('old_password')
+    new_password = data.get('new_password')
+    
+    if not old_password or not new_password:
+        return jsonify({'error': '请输入旧密码和新密码'}), 400
+    
+    if len(new_password) < 6:
+        return jsonify({'error': '新密码长度至少6位'}), 400
+    
+    old_hash = hashlib.sha256(old_password.encode()).hexdigest()
+    new_hash = hashlib.sha256(new_password.encode()).hexdigest()
+    
+    conn = get_db()
+    cursor = conn.cursor()
+    
+    # 验证旧密码
+    cursor.execute('SELECT id FROM users WHERE id = ? AND password_hash = ?', (id, old_hash))
+    if not cursor.fetchone():
+        conn.close()
+        return jsonify({'error': '旧密码不正确'}), 400
+    
+    # 更新密码
+    cursor.execute('UPDATE users SET password_hash=?, updated_at=CURRENT_TIMESTAMP WHERE id=?', 
+                   (new_hash, id))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
 # ==================== 大模型接口管理 ====================
 
 @app.route('/api/admin/llm', methods=['GET'])

www/admin.html

@@ -435,6 +435,10 @@
           <span class="sidebar-icon">📊</span>
           <span>统计信息</span>
         </div>
+        <div class="sidebar-item" data-page="users">
+          <span class="sidebar-icon">👥</span>
+          <span>用户管理</span>
+        </div>
         <div class="sidebar-item" data-page="llm">
           <span class="sidebar-icon">🧠</span>
           <span>大模型配置</span>

www/admin.js

@@ -81,6 +81,9 @@ async function loadPage(page) {
     case 'stats':
       await loadStatsPage(content);
       break;
+    case 'users':
+      await loadUsersPage(content);
+      break;
     case 'llm':
       await loadLLMPage(content);
       break;
@@ -177,6 +180,222 @@ async function loadStatsPage(content) {
   `;
 }
 
+// ==================== 用户管理页面 ====================
+
+let users = [];
+
+async function loadUsersPage(content) {
+  users = await fetchAPI('/api/admin/users');
+  
+  content.innerHTML = `
+    <div class="content-header">
+      <h1 class="content-title">用户管理</h1>
+      <div style="display: flex; gap: 12px;">
+        <input type="text" class="form-input" id="userSearch" placeholder="搜索用户名/手机/邮箱" style="width: 200px;" onkeyup="searchUsers(event)">
+        <button class="add-btn" onclick="searchUsersBtn()">搜索</button>
+      </div>
+    </div>
+    
+    <div class="stats-grid" style="grid-template-columns: repeat(4, 1fr);">
+      <div class="stat-card">
+        <div class="stat-icon">👥</div>
+        <div class="stat-value">${users.length}</div>
+        <div class="stat-label">总用户数</div>
+      </div>
+      <div class="stat-card">
+        <div class="stat-icon">🆕</div>
+        <div class="stat-value">${users.filter(u => {
+          const today = new Date().toISOString().slice(0, 10);
+          return u.created_at && u.created_at.startsWith(today);
+        }).length}</div>
+        <div class="stat-label">今日新增</div>
+      </div>
+      <div class="stat-card">
+        <div class="stat-icon">📧</div>
+        <div class="stat-value">${users.filter(u => u.email).length}</div>
+        <div class="stat-label">已绑定邮箱</div>
+      </div>
+      <div class="stat-card">
+        <div class="stat-icon">📱</div>
+        <div class="stat-value">${users.length}</div>
+        <div class="stat-label">已绑定手机</div>
+      </div>
+    </div>
+    
+    <div class="data-table">
+      <table>
+        <thead>
+          <tr>
+            <th>ID</th>
+            <th>头像</th>
+            <th>用户名</th>
+            <th>手机号</th>
+            <th>邮箱</th>
+            <th>注册时间</th>
+            <th>最后登录</th>
+            <th>操作</th>
+          </tr>
+        </thead>
+        <tbody>
+          ${users.length === 0 ? '<tr><td colspan="8" style="text-align: center; color: #999;">暂无用户</td></tr>' : 
+            users.map(u => `
+              <tr>
+                <td>${u.id}</td>
+                <td style="font-size: 24px;">${u.avatar || '👤'}</td>
+                <td>${u.username}</td>
+                <td>${u.phone}</td>
+                <td>${u.email || '-'}</td>
+                <td>${formatDate(u.created_at)}</td>
+                <td>${u.last_login_at ? formatDate(u.last_login_at) : '从未登录'}</td>
+                <td>
+                  <div class="action-btns">
+                    <button class="action-btn edit" onclick="showEditUserModal(${u.id})">编辑</button>
+                    <button class="action-btn" style="background: #f59e0b; color: white;" onclick="showResetPasswordModal(${u.id})">重置密码</button>
+                    <button class="action-btn delete" onclick="deleteUser(${u.id})">删除</button>
+                  </div>
+                </td>
+              </tr>
+            `).join('')
+          }
+        </tbody>
+      </table>
+    </div>
+  `;
+}
+
+function formatDate(dateStr) {
+  if (!dateStr) return '-';
+  const d = new Date(dateStr);
+  return d.toLocaleDateString() + ' ' + d.toLocaleTimeString().slice(0, 5);
+}
+
+async function searchUsers(event) {
+  if (event && event.key !== 'Enter') return;
+  const search = document.getElementById('userSearch').value.trim();
+  users = await fetchAPI(`/api/admin/users?search=${encodeURIComponent(search)}`);
+  loadUsersPage(document.getElementById('mainContent'));
+}
+
+async function searchUsersBtn() {
+  const search = document.getElementById('userSearch').value.trim();
+  users = await fetchAPI(`/api/admin/users?search=${encodeURIComponent(search)}`);
+  loadUsersPage(document.getElementById('mainContent'));
+}
+
+function showEditUserModal(id) {
+  const user = users.find(u => u.id === id);
+  if (!user) return;
+  
+  const avatars = ['👤', '😊', '😎', '🤓', '🦸', '🧙', '🥷', '👨', '👩', '🧑', '👴', '👵', '👦', '👧', '🤖', '👽', '🧛', '🧜', '🧚', '🦊'];
+  
+  showModal('编辑用户', `
+    <div class="form-group">
+      <label class="form-label">用户名</label>
+      <input type="text" class="form-input" id="editUserName" value="${user.username}">
+    </div>
+    <div class="form-group">
+      <label class="form-label">手机号（不可修改）</label>
+      <input type="text" class="form-input" id="editUserPhone" value="${user.phone}" readonly style="background: #f5f7fa;">
+    </div>
+    <div class="form-group">
+      <label class="form-label">邮箱</label>
+      <input type="email" class="form-input" id="editUserEmail" value="${user.email || ''}">
+    </div>
+    <div class="form-group">
+      <label class="form-label">头像</label>
+      <select class="form-select" id="editUserAvatar">
+        ${avatars.map(a => `<option value="${a}" ${a === (user.avatar || '👤') ? 'selected' : ''}>${a}</option>`).join('')}
+      </select>
+    </div>
+    <div class="form-group">
+      <label class="form-label">个性签名</label>
+      <input type="text" class="form-input" id="editUserSignature" value="${user.signature || ''}" maxlength="50">
+    </div>
+    <div class="form-group">
+      <label class="form-label">性别</label>
+      <select class="form-select" id="editUserGender">
+        <option value="" ${!user.gender ? 'selected' : ''}>未设置</option>
+        <option value="male" ${user.gender === 'male' ? 'selected' : ''}>男</option>
+        <option value="female" ${user.gender === 'female' ? 'selected' : ''}>女</option>
+        <option value="other" ${user.gender === 'other' ? 'selected' : ''}>其他</option>
+      </select>
+    </div>
+    <div class="form-group">
+      <label class="form-label">年龄</label>
+      <input type="number" class="form-input" id="editUserAge" value="${user.age || ''}" min="1" max="150">
+    </div>
+    <div class="form-group">
+      <label class="form-label">地区</label>
+      <input type="text" class="form-input" id="editUserRegion" value="${user.region || ''}">
+    </div>
+    <button class="form-submit" onclick="updateUser(${id})">保存</button>
+  `);
+}
+
+async function updateUser(id) {
+  const data = {
+    username: document.getElementById('editUserName').value,
+    email: document.getElementById('editUserEmail').value,
+    avatar: document.getElementById('editUserAvatar').value,
+    signature: document.getElementById('editUserSignature').value,
+    gender: document.getElementById('editUserGender').value,
+    age: document.getElementById('editUserAge').value ? parseInt(document.getElementById('editUserAge').value) : null,
+    region: document.getElementById('editUserRegion').value
+  };
+  
+  if (!data.username) {
+    showToast('用户名不能为空');
+    return;
+  }
+  
+  await fetchAPI(`/api/admin/users/${id}`, 'PUT', data);
+  closeModal();
+  showToast('更新成功');
+  loadPage('users');
+}
+
+function showResetPasswordModal(id) {
+  const user = users.find(u => u.id === id);
+  if (!user) return;
+  
+  showModal('重置密码', `
+    <div style="padding: 16px; background: #f5f7fa; border-radius: 8px; margin-bottom: 16px;">
+      <p><strong>用户:</strong> ${user.username}</p>
+      <p><strong>手机:</strong> ${user.phone}</p>
+    </div>
+    <div class="form-group">
+      <label class="form-label">新密码</label>
+      <input type="text" class="form-input" id="resetPassword" placeholder="输入新密码（至少6位）">
+    </div>
+    <p style="color: #999; font-size: 12px;">⚠️ 重置后用户需使用新密码登录</p>
+    <button class="form-submit" onclick="resetPassword(${id})">确认重置</button>
+  `);
+}
+
+async function resetPassword(id) {
+  const password = document.getElementById('resetPassword').value;
+  
+  if (!password || password.length < 6) {
+    showToast('密码长度至少6位');
+    return;
+  }
+  
+  await fetchAPI(`/api/admin/users/${id}/password`, 'PUT', { password });
+  closeModal();
+  showToast('密码已重置');
+}
+
+async function deleteUser(id) {
+  const user = users.find(u => u.id === id);
+  if (!user) return;
+  
+  if (!confirm(`确定删除用户 "${user.username}"？\n此操作不可恢复！`)) return;
+  
+  await fetchAPI(`/api/admin/users/${id}`, 'DELETE');
+  showToast('删除成功');
+  loadPage('users');
+}
+
 // ==================== 大模型配置页面 ====================
 
 async function loadLLMPage(content) {
@@ -512,39 +731,6 @@ function showAddAgentModal() {
     <button class="form-submit" onclick="saveAgent()">保存</button>
   `);
 }
-      </select>
-    </div>
-    <div class="form-group">
-      <label class="form-label">描述</label>
-      <input type="text" class="form-input" id="agentDescription" placeholder="智能体描述">
-    </div>
-    <div class="form-group">
-      <label class="form-label">System Prompt</label>
-      <textarea class="form-textarea" id="agentPrompt" placeholder="系统提示词"></textarea>
-    </div>
-    <div class="form-group">
-      <label class="form-label">LLM配置</label>
-      <select class="form-select" id="agentLLM">
-        <option value="">使用默认</option>
-        ${llmConfigs.map(c => `<option value="${c.id}">${c.name}</option>`).join('')}
-      </select>
-    </div>
-    <div class="form-group">
-      <label class="form-label">热度</label>
-      <input type="number" class="form-input" id="agentHeat" value="0">
-    </div>
-    <div class="form-group">
-      <label class="form-label">标签</label>
-      <input type="text" class="form-input" id="agentTags" placeholder="多个标签用逗号分隔">
-    </div>
-    <div class="form-group">
-      <label style="display: flex; align-items: center; gap: 8px;">
-        <input type="checkbox" id="agentEnableSearch"> 启用联网搜索
-      </label>
-    </div>
-    <button class="form-submit" onclick="saveAgent()">保存</button>
-  `);
-}
 
 function showEditAgentModal(agentId) {
   const agent = agents.find(a => a.agent_id === agentId);

www/app.js

@@ -2447,18 +2447,34 @@ function handleLogin() {
     return;
   }
   
-  // 检查本地存储的用户
-  const users = JSON.parse(localStorage.getItem('registeredUsers') || '[]');
-  const user = users.find(u => u.username === username && u.password === password);
-  
-  if (user) {
-    currentUser = { username: user.username, registeredAt: user.registeredAt };
-    saveCurrentUser();
-    showToast('登录成功');
-    showMainPage();
-  } else {
-    showToast('用户名或密码错误');
-  }
+  // 调用后台登录API
+  fetch('/api/login', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ username, password })
+  })
+  .then(res => res.json())
+  .then(data => {
+    if (data.success) {
+      currentUser = {
+        id: data.user.id,
+        username: data.user.username,
+        phone: data.user.phone,
+        email: data.user.email || '',
+        avatar: data.user.avatar || '👤',
+        signature: data.user.signature || '',
+        registeredAt: Date.now()
+      };
+      saveCurrentUser();
+      showToast('登录成功');
+      showMainPage();
+    } else {
+      showToast(data.error || '用户名或密码错误');
+    }
+  })
+  .catch(e => {
+    showToast('网络错误，请重试');
+  });
 }
 
 // ==================== 注册页面 ====================
@@ -2477,12 +2493,21 @@ function showRegisterPage() {
         <div class="auth-form">
           <div class="auth-input-group">
             <label>用户名</label>
-            <input type="text" id="registerUsername" placeholder="请输入用户名（3-20字符）" autocomplete="username">
+            <input type="text" id="registerUsername" placeholder="请输入用户名（2-20字符）" autocomplete="username">
           </div>
           <div class="auth-input-group">
             <label>手机号 <span class="required">*</span></label>
             <input type="tel" id="registerPhone" placeholder="请输入手机号" maxlength="11" autocomplete="tel">
           </div>
+          <div class="auth-input-group" style="display: flex; gap: 8px;">
+            <div style="flex: 1;">
+              <label>验证码 <span class="required">*</span></label>
+              <input type="text" id="registerCode" placeholder="请输入验证码" maxlength="6">
+            </div>
+            <div style="flex-shrink: 0; align-self: flex-end;">
+              <button class="send-code-btn" id="getCodeBtn">获取验证码</button>
+            </div>
+          </div>
           <div class="auth-input-group">
             <label>邮箱 <span class="optional">(可选)</span></label>
             <input type="email" id="registerEmail" placeholder="请输入邮箱（可选）" autocomplete="email">
@@ -2527,6 +2552,12 @@ function showRegisterPage() {
     });
   }
   
+  // 获取验证码按钮
+  const getCodeBtn = document.getElementById('getCodeBtn');
+  if (getCodeBtn) {
+    getCodeBtn.addEventListener('click', handleGetCode);
+  }
+  
   // 回车注册
   document.getElementById('registerPasswordConfirm')?.addEventListener('keydown', (e) => {
     if (e.key === 'Enter') handleRegister();
@@ -2539,6 +2570,50 @@ function showRegisterPage() {
       e.target.value = e.target.value.replace(/\D/g, '');
     });
   }
+  
+  // 验证码输入限制（只允许数字）
+  const codeInput = document.getElementById('registerCode');
+  if (codeInput) {
+    codeInput.addEventListener('input', (e) => {
+      e.target.value = e.target.value.replace(/\D/g, '');
+    });
+  }
+}
+
+// 获取验证码（模拟）
+let verifyCode = '';
+let codeExpireTime = 0;
+
+function handleGetCode() {
+  const phone = document.getElementById('registerPhone')?.value.trim();
+  
+  if (!validatePhone(phone)) {
+    showToast('请先输入正确的手机号');
+    return;
+  }
+  
+  // 生成6位随机验证码
+  verifyCode = Math.floor(100000 + Math.random() * 900000).toString();
+  codeExpireTime = Date.now() + 5 * 60 * 1000;  // 5分钟有效
+  
+  // 模拟发送（实际项目中应调用短信API）
+  showToast(`验证码已发送: ${verifyCode}（演示）`);
+  
+  // 60秒倒计时
+  const getCodeBtn = document.getElementById('getCodeBtn');
+  if (getCodeBtn) {
+    getCodeBtn.disabled = true;
+    let countdown = 60;
+    const timer = setInterval(() => {
+      getCodeBtn.textContent = `${countdown}s`;
+      countdown--;
+      if (countdown <= 0) {
+        clearInterval(timer);
+        getCodeBtn.disabled = false;
+        getCodeBtn.textContent = '获取验证码';
+      }
+    }, 1000);
+  }
 }
 
 // 验证手机号格式
@@ -2559,12 +2634,13 @@ function handleRegister() {
   const username = document.getElementById('registerUsername')?.value.trim();
   const phone = document.getElementById('registerPhone')?.value.trim();
   const email = document.getElementById('registerEmail')?.value.trim();
+  const code = document.getElementById('registerCode')?.value.trim();
   const password = document.getElementById('registerPassword')?.value;
   const passwordConfirm = document.getElementById('registerPasswordConfirm')?.value;
   
   // 验证用户名
-  if (!username || username.length < 3 || username.length > 20) {
-    showToast('用户名需要3-20个字符');
+  if (!username || username.length < 2 || username.length > 20) {
+    showToast('用户名需要2-20个字符');
     return;
   }
   
@@ -2574,8 +2650,20 @@ function handleRegister() {
     return;
   }
   
+  // 验证验证码
+  if (!code || code.length !== 6) {
+    showToast('请输入6位验证码');
+    return;
+  }
+  
+  // 检查验证码是否正确（模拟）
+  if (code !== verifyCode || Date.now() > codeExpireTime) {
+    showToast('验证码不正确或已过期');
+    return;
+  }
+  
   // 验证邮箱（可选）
-  if (!validateEmail(email)) {
+  if (email && !validateEmail(email)) {
     showToast('请输入正确的邮箱格式');
     return;
   }
@@ -2591,37 +2679,39 @@ function handleRegister() {
     return;
   }
   
-  // 检查用户名是否已存在
-  const users = JSON.parse(localStorage.getItem('registeredUsers') || '[]');
-  if (users.find(u => u.username === username)) {
-    showToast('用户名已存在');
-    return;
-  }
-  
-  // 检查手机号是否已注册
-  if (users.find(u => u.phone === phone)) {
-    showToast('该手机号已注册');
-    return;
-  }
-  
-  // 注册新用户
-  const newUser = {
-    username,
-    phone,
-    email: email || '',
-    password,
-    registeredAt: Date.now()
-  };
-  
-  users.push(newUser);
-  localStorage.setItem('registeredUsers', JSON.stringify(users));
-  
-  // 自动登录
-  currentUser = { username: newUser.username, phone: newUser.phone, registeredAt: newUser.registeredAt };
-  saveCurrentUser();
-  
-  showToast('注册成功');
-  showMainPage();
+  // 调用后台注册API
+  fetch('/api/register', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      username,
+      phone,
+      email: email || '',
+      password,
+      code
+    })
+  })
+  .then(res => res.json())
+  .then(data => {
+    if (data.success) {
+      // 注册成功，自动登录
+      currentUser = {
+        id: data.user_id,
+        username: username,
+        phone: phone,
+        email: email || '',
+        registeredAt: Date.now()
+      };
+      saveCurrentUser();
+      showToast('注册成功');
+      showMainPage();
+    } else {
+      showToast(data.error || '注册失败');
+    }
+  })
+  .catch(e => {
+    showToast('网络错误，请重试');
+  });
 }
 
 // ==================== 限制提示 ====================