diff --git a/src/DRS9.Dashboard.Application/DTOs/DeviceAuthDto.cs b/src/DRS9.Dashboard.Application/DTOs/DeviceAuthDto.cs
index ffed833..fad8495 100644
--- a/src/DRS9.Dashboard.Application/DTOs/DeviceAuthDto.cs
+++ b/src/DRS9.Dashboard.Application/DTOs/DeviceAuthDto.cs
@@ -7,9 +7,8 @@ public record DeviceRegisterRequest
     [Required]
     public string DeviceCode { get; set; } = string.Empty;
 
-    [Required]
     [MaxLength(200)]
-    public string DeviceName { get; set; } = string.Empty;
+    public string? DeviceName { get; set; }
 
     [MaxLength(50)]
     public string? DeviceType { get; set; }
@@ -27,6 +26,7 @@ public record DeviceRegisterResponse
     public string? Token { get; set; }
     public string? Message { get; set; }
     public int DeviceId { get; set; }
+    public string? DeviceName { get; set; }
 }
 
 public record DeviceRefreshTokenRequest
diff --git a/src/DRS9.Dashboard.Application/Services/DeviceService.cs b/src/DRS9.Dashboard.Application/Services/DeviceService.cs
index 381eb3d..2809e7d 100644
--- a/src/DRS9.Dashboard.Application/Services/DeviceService.cs
+++ b/src/DRS9.Dashboard.Application/Services/DeviceService.cs
@@ -40,11 +40,23 @@ public class DeviceService
             };
         }
 
-        // 更新设备信息
-        device.DeviceName = request.DeviceName;
-        device.DeviceType = request.DeviceType;
-        device.OsVersion = request.OsVersion;
-        device.AppVersion = request.AppVersion;
+        // 更新设备信息 (如果提供了则使用，否则保留原值)
+        if (!string.IsNullOrWhiteSpace(request.DeviceName))
+        {
+            device.DeviceName = request.DeviceName;
+        }
+        if (!string.IsNullOrWhiteSpace(request.DeviceType))
+        {
+            device.DeviceType = request.DeviceType;
+        }
+        if (!string.IsNullOrWhiteSpace(request.OsVersion))
+        {
+            device.OsVersion = request.OsVersion;
+        }
+        if (!string.IsNullOrWhiteSpace(request.AppVersion))
+        {
+            device.AppVersion = request.AppVersion;
+        }
         device.IsActive = true;
         device.ActivatedAt = device.ActivatedAt ?? DateTime.UtcNow;
         device.LastSeenAt = DateTime.UtcNow;
@@ -60,6 +72,7 @@ public class DeviceService
             Success = true,
             Token = token,
             DeviceId = device.Id,
+            DeviceName = device.DeviceName,
             Message = "注册成功"
         };
     }
diff --git a/src/DRS9.Dashboard.Server/Components/Pages/Devices.razor b/src/DRS9.Dashboard.Server/Components/Pages/Devices.razor
index ca61737..0689c93 100644
--- a/src/DRS9.Dashboard.Server/Components/Pages/Devices.razor
+++ b/src/DRS9.Dashboard.Server/Components/Pages/Devices.razor
@@ -63,7 +63,39 @@
                                                 <span class="badge bg-secondary">禁用</span>
                                             }
                                         </td>
-                                        <td>@device.LastSeenAt?.ToString("MM-dd HH:mm") ?? "从未"</td>
+                                        <td>
+                                            @if (!device.LastSeenAt.HasValue)
+                                            {
+                                                <span class="text-muted">等待首次连接</span>
+                                            }
+                                            else
+                                            {
+                                                var timeDiff = DateTime.UtcNow - device.LastSeenAt.Value;
+                                                @if (timeDiff.TotalMinutes < 1)
+                                                {
+                                                    <span class="text-success"><i class="bi bi-circle-fill"></i> 在线</span>
+                                                }
+                                                else if (timeDiff.TotalMinutes < 60)
+                                                {
+                                                    var mins = (int)timeDiff.TotalMinutes;
+                                                    <span class="text-warning">@mins 分钟前</span>
+                                                }
+                                                else if (timeDiff.TotalHours < 24)
+                                                {
+                                                    var hours = (int)timeDiff.TotalHours;
+                                                    <span class="text-info">@hours 小时前</span>
+                                                }
+                                                else if (timeDiff.TotalDays < 7)
+                                                {
+                                                    var days = (int)timeDiff.TotalDays;
+                                                    <span>@days 天前</span>
+                                                }
+                                                else
+                                                {
+                                                    <span class="text-muted">@device.LastSeenAt.Value:MM-dd HH:mm</span>
+                                                }
+                                            }
+                                        </td>
                                         <td>
                                             <button class="btn btn-sm btn-outline-primary" @onclick="@(() => EditDevice(device))">
                                                 <i class="bi bi-pencil"></i>
diff --git a/src/DRS9.Dashboard.Server/Program.cs b/src/DRS9.Dashboard.Server/Program.cs
index 56d5981..d740ed3 100644
--- a/src/DRS9.Dashboard.Server/Program.cs
+++ b/src/DRS9.Dashboard.Server/Program.cs
@@ -161,4 +161,4 @@ app.MapRazorComponents<DRS9.Dashboard.Server.Components.App>()
 // WebSocket endpoint
 app.Map("/ws", app => app.UseMiddleware<WebSocketMiddleware>());
 
-app.Run();
+app.Run("http://localhost:5000");
diff --git a/src/DRS9.Dashboard.Server/Properties/launchSettings.json b/src/DRS9.Dashboard.Server/Properties/launchSettings.json
index db22457..596fb6c 100644
--- a/src/DRS9.Dashboard.Server/Properties/launchSettings.json
+++ b/src/DRS9.Dashboard.Server/Properties/launchSettings.json
@@ -5,7 +5,7 @@
       "commandName": "Project",
       "dotnetRunMessages": true,
       "launchBrowser": false,
-      "applicationUrl": "http://localhost:5264",
+      "applicationUrl": "http://localhost:5000",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
       }
diff --git a/src/DRS9.Dashboard.Server/dashboard.db b/src/DRS9.Dashboard.Server/dashboard.db
index a116249..bfc3f91 100644
Binary files a/src/DRS9.Dashboard.Server/dashboard.db and b/src/DRS9.Dashboard.Server/dashboard.db differ
diff --git a/src/DRS9.Dashboard.Server/wwwroot/device-client.html b/src/DRS9.Dashboard.Server/wwwroot/device-client.html
new file mode 100644
index 0000000..ecc879c
--- /dev/null
+++ b/src/DRS9.Dashboard.Server/wwwroot/device-client.html
@@ -0,0 +1,563 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>DRS9 设备端测试客户端</title>
+    <style>
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+
+        html, body {
+            width: 100%;
+            height: 100%;
+            overflow: hidden;
+        }
+
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+            background: #1a1a2e;
+            color: #eee;
+        }
+
+        /* 注册界面 */
+        #register-screen {
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            min-height: 100vh;
+            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
+        }
+
+        .register-box {
+            background: rgba(255,255,255,0.1);
+            backdrop-filter: blur(10px);
+            padding: 40px;
+            border-radius: 20px;
+            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
+            text-align: center;
+            max-width: 400px;
+            width: 90%;
+        }
+
+        .register-box h1 {
+            margin-bottom: 30px;
+            font-size: 28px;
+        }
+
+        .register-box input {
+            width: 100%;
+            padding: 15px;
+            margin-bottom: 20px;
+            border: none;
+            border-radius: 10px;
+            background: rgba(255,255,255,0.1);
+            color: #fff;
+            font-size: 16px;
+        }
+
+        .register-box input::placeholder {
+            color: rgba(255,255,255,0.5);
+        }
+
+        .register-box button {
+            width: 100%;
+            padding: 15px;
+            border: none;
+            border-radius: 10px;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: #fff;
+            font-size: 16px;
+            font-weight: bold;
+            cursor: pointer;
+            transition: transform 0.2s;
+        }
+
+        .register-box button:hover {
+            transform: scale(1.02);
+        }
+
+        /* 内容显示区 */
+        #content-screen {
+            display: none;
+            width: 100%;
+            height: 100%;
+            position: fixed;
+            top: 0;
+            left: 0;
+            right: 0;
+            bottom: 0;
+        }
+
+        #content-container {
+            width: 100%;
+            height: 100%;
+        }
+
+        #content-frame {
+            width: 100%;
+            height: 100%;
+            border: none;
+            background: #000;
+            display: block;
+        }
+
+        /* 状态栏 */
+        #status-bar {
+            position: fixed;
+            top: 0;
+            left: 0;
+            right: 0;
+            background: rgba(0,0,0,0.8);
+            color: #0f0;
+            padding: 8px 15px;
+            font-size: 12px;
+            font-family: monospace;
+            z-index: 9999;
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+        }
+
+        #status-bar.connected {
+            background: rgba(0,100,0,0.8);
+        }
+
+        #status-bar.disconnected {
+            background: rgba(100,0,0,0.8);
+        }
+
+        /* 控制面板 */
+        #control-panel {
+            position: fixed;
+            bottom: 20px;
+            right: 20px;
+            background: rgba(0,0,0,0.8);
+            padding: 15px;
+            border-radius: 10px;
+            z-index: 9999;
+        }
+
+        #control-panel button {
+            padding: 8px 15px;
+            margin: 5px;
+            border: none;
+            border-radius: 5px;
+            background: #444;
+            color: #fff;
+            cursor: pointer;
+        }
+
+        #control-panel button:hover {
+            background: #666;
+        }
+
+        /* 加载动画 */
+        .loading {
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            min-height: 100vh;
+            font-size: 24px;
+        }
+
+        .loading::after {
+            content: '...';
+            animation: dots 1.5s steps(4, end) infinite;
+        }
+
+        @keyframes dots {
+            0%, 20% { content: '.'; }
+            40% { content: '..'; }
+            60%, 100% { content: '...'; }
+        }
+
+        /* 消息提示 */
+        .message {
+            position: fixed;
+            top: 50%;
+            left: 50%;
+            transform: translate(-50%, -50%);
+            background: rgba(0,0,0,0.9);
+            color: #fff;
+            padding: 30px 50px;
+            border-radius: 15px;
+            font-size: 18px;
+            z-index: 10000;
+        }
+
+        /* 图片/视频全屏 */
+        #media-container {
+            width: 100%;
+            height: 100%;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            background: #000;
+            position: fixed;
+            top: 0;
+            left: 0;
+        }
+
+        #media-container img,
+        #media-container video {
+            width: 100%;
+            height: 100%;
+            object-fit: contain;
+        }
+    </style>
+</head>
+<body>
+    <!-- 注册界面 -->
+    <div id="register-screen">
+        <div class="register-box">
+            <h1>🖥️ DRS9 设备端</h1>
+            <p style="margin-bottom: 20px; color: rgba(255,255,255,0.7);">
+                请输入设备码以注册此设备
+            </p>
+            <input
+                type="text"
+                id="deviceCode"
+                placeholder="设备码 (如: TEST-DEVICE-001)"
+                autofocus
+            >
+            <button onclick="registerDevice()">注册设备</button>
+            <p id="register-error" style="color: #ff6b6b; margin-top: 15px; display: none;"></p>
+        </div>
+    </div>
+
+    <!-- 内容显示区 -->
+    <div id="content-screen">
+        <div id="status-bar" class="disconnected">
+            <span id="status-text">未连接</span>
+            <span id="device-info"></span>
+        </div>
+        <div id="content-container"></div>
+
+        <div id="control-panel">
+            <button onclick="loadContent()">🔄 刷新内容</button>
+            <button onclick="showDeviceInfo()">ℹ️ 设备信息</button>
+            <button onclick="logout()">🚪 退出</button>
+        </div>
+    </div>
+
+    <script>
+        // 配置
+        const API_BASE = 'http://localhost:5000/api';
+        const WS_BASE = 'ws://localhost:5000/ws';
+
+        // 状态
+        let token = localStorage.getItem('drs9_deviceToken');
+        let deviceId = localStorage.getItem('drs9_deviceId');
+        let deviceName = localStorage.getItem('drs9_deviceName');
+        let ws = null;
+        let heartbeatInterval = null;
+
+        // 初始化
+        window.onload = function() {
+            if (token) {
+                showContentScreen();
+                loadContent();
+                connectWebSocket();
+                startHeartbeat();
+            } else {
+                showRegisterScreen();
+            }
+
+            // 支持回车键提交
+            document.getElementById('deviceCode').addEventListener('keypress', function(e) {
+                if (e.key === 'Enter') registerDevice();
+            });
+        };
+
+        // 显示注册界面
+        function showRegisterScreen() {
+            document.getElementById('register-screen').style.display = 'flex';
+            document.getElementById('content-screen').style.display = 'none';
+            document.getElementById('deviceCode').focus();
+        }
+
+        // 显示内容界面
+        function showContentScreen() {
+            document.getElementById('register-screen').style.display = 'none';
+            document.getElementById('content-screen').style.display = 'block';
+            updateDeviceInfo();
+        }
+
+        // 注册设备
+        async function registerDevice() {
+            const deviceCode = document.getElementById('deviceCode').value.trim();
+            const errorEl = document.getElementById('register-error');
+
+            if (!deviceCode) {
+                errorEl.textContent = '请输入设备码';
+                errorEl.style.display = 'block';
+                return;
+            }
+
+            errorEl.style.display = 'none';
+            console.log('开始注册设备:', deviceCode);
+
+            try {
+                const response = await fetch(`${API_BASE}/devices/register`, {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({
+                        deviceCode: deviceCode,
+                        deviceType: 'Web',
+                        osVersion: navigator.userAgent.substring(0, 50)  // 限制在50字符以内
+                    })
+                });
+
+                console.log('响应状态:', response.status, response.statusText);
+
+                const data = await response.json();
+                console.log('响应数据:', data);
+
+                if (data.success) {
+                    token = data.token;
+                    deviceId = data.deviceId;
+                    deviceName = data.deviceName;
+
+                    localStorage.setItem('drs9_deviceToken', token);
+                    localStorage.setItem('drs9_deviceId', deviceId);
+                    localStorage.setItem('drs9_deviceName', deviceName);
+
+                    console.log('注册成功:', { deviceId, deviceName });
+
+                    showContentScreen();
+                    loadContent();
+                    connectWebSocket();
+                    startHeartbeat();
+                } else {
+                    errorEl.textContent = data.message || '注册失败';
+                    errorEl.style.display = 'block';
+                }
+            } catch (error) {
+                console.error('注册错误:', error);
+                errorEl.textContent = '网络错误: ' + error.message;
+                errorEl.style.display = 'block';
+            }
+        }
+
+        // 获取并显示内容
+        async function loadContent() {
+            showLoading('正在加载内容...');
+
+            try {
+                const response = await fetch(`${API_BASE}/devices/content`, {
+                    headers: { 'Authorization': `Bearer ${token}` }
+                });
+
+                const data = await response.json();
+
+                if (data.success) {
+                    if (data.data && data.data.length > 0) {
+                        displayContent(data.data[0]);
+                    } else {
+                        showMessage('暂无分配内容<br><small>请在管理后台为设备分配内容</small>');
+                    }
+                } else {
+                    showMessage('获取内容失败: ' + (data.message || '未知错误'));
+                }
+            } catch (error) {
+                showMessage('网络错误: ' + error.message);
+            }
+        }
+
+        // 显示内容
+        function displayContent(item) {
+            const container = document.getElementById('content-container');
+
+            const type = item.applicationType;
+            const url = item.contentUrl;
+            const name = item.applicationName;
+
+            console.log('显示内容:', { type, url, name });
+
+            switch (type) {
+                case 'Dashboard':
+                case 'WebRotator':
+                    container.innerHTML = `<iframe id="content-frame" src="${url}" frameborder="0"></iframe>`;
+                    break;
+
+                case 'Image':
+                    container.innerHTML = `
+                        <div id="media-container">
+                            <img src="${url}" alt="${name}">
+                        </div>
+                    `;
+                    break;
+
+                case 'Video':
+                    container.innerHTML = `
+                        <div id="media-container">
+                            <video src="${url}" autoplay loop muted playsinline></video>
+                        </div>
+                    `;
+                    break;
+
+                default:
+                    container.innerHTML = `<iframe id="content-frame" src="${url}" frameborder="0"></iframe>`;
+            }
+        }
+
+        // WebSocket连接
+        function connectWebSocket() {
+            if (ws) {
+                ws.close();
+            }
+
+            ws = new WebSocket(`${WS_BASE}?token=${token}`);
+
+            ws.onopen = function() {
+                console.log('✅ WebSocket 已连接');
+                updateStatus('connected', '已连接');
+            };
+
+            ws.onmessage = function(event) {
+                try {
+                    const msg = JSON.parse(event.data);
+                    console.log('📨 收到消息:', msg);
+
+                    switch (msg.type) {
+                        case 'content_refresh':
+                            console.log('🔄 刷新内容');
+                            loadContent();
+                            showNotification('内容已刷新');
+                            break;
+                        case 'app_restart':
+                            console.log('🔃 重启应用');
+                            showNotification('正在重启...');
+                            setTimeout(() => location.reload(), 1000);
+                            break;
+                        default:
+                            console.log('❓ 未知消息类型:', msg.type);
+                    }
+                } catch (e) {
+                    console.error('解析消息失败:', e);
+                }
+            };
+
+            ws.onerror = function(error) {
+                console.error('❌ WebSocket 错误:', error);
+            };
+
+            ws.onclose = function() {
+                console.log('⚠️ WebSocket 断开，5秒后重连...');
+                updateStatus('disconnected', '连接断开 - 重连中...');
+                setTimeout(connectWebSocket, 5000);
+            };
+        }
+
+        // 心跳
+        function startHeartbeat() {
+            if (heartbeatInterval) {
+                clearInterval(heartbeatInterval);
+            }
+
+            heartbeatInterval = setInterval(async () => {
+                try {
+                    const response = await fetch(`${API_BASE}/devices/heartbeat`, {
+                        method: 'POST',
+                        headers: { 'Authorization': `Bearer ${token}` }
+                    });
+
+                    if (response.ok) {
+                        console.log('💓 心跳成功');
+                    }
+                } catch (error) {
+                    console.error('💔 心跳失败:', error);
+                }
+            }, 30000); // 30秒心跳
+        }
+
+        // 更新状态栏
+        function updateStatus(status, text) {
+            const statusBar = document.getElementById('status-bar');
+            const statusText = document.getElementById('status-text');
+
+            statusBar.className = status;
+            statusText.textContent = text;
+        }
+
+        // 更新设备信息
+        function updateDeviceInfo() {
+            document.getElementById('device-info').textContent =
+                `${deviceName || '未知设备'} (ID: ${deviceId || '?'})`;
+        }
+
+        // 显示加载
+        function showLoading(text) {
+            document.getElementById('content-container').innerHTML =
+                `<div class="loading">${text || '加载中'}</div>`;
+        }
+
+        // 显示消息
+        function showMessage(html) {
+            document.getElementById('content-container').innerHTML =
+                `<div class="message">${html}</div>`;
+        }
+
+        // 显示通知
+        function showNotification(text) {
+            const notification = document.createElement('div');
+            notification.style.cssText = `
+                position: fixed;
+                top: 60px;
+                right: 20px;
+                background: rgba(0,200,0,0.9);
+                color: #fff;
+                padding: 15px 25px;
+                border-radius: 10px;
+                z-index: 10001;
+                animation: slideIn 0.3s ease;
+            `;
+            notification.textContent = text;
+            document.body.appendChild(notification);
+
+            setTimeout(() => {
+                notification.style.opacity = '0';
+                notification.style.transition = 'opacity 0.3s';
+                setTimeout(() => notification.remove(), 300);
+            }, 2000);
+        }
+
+        // 显示设备信息
+        function showDeviceInfo() {
+            alert(`设备信息:\n名称: ${deviceName}\nID: ${deviceId}\n状态: ${ws?.connected ? '已连接' : '未连接'}`);
+        }
+
+        // 退出登录
+        function logout() {
+            if (confirm('确定要退出吗？')) {
+                if (ws) ws.close();
+                if (heartbeatInterval) clearInterval(heartbeatInterval);
+
+                localStorage.removeItem('drs9_deviceToken');
+                localStorage.removeItem('drs9_deviceId');
+                localStorage.removeItem('drs9_deviceName');
+
+                token = null;
+                deviceId = null;
+                deviceName = null;
+
+                showRegisterScreen();
+            }
+        }
+
+        // 添加CSS动画
+        const style = document.createElement('style');
+        style.textContent = `
+            @keyframes slideIn {
+                from { transform: translateX(100%); opacity: 0; }
+                to { transform: translateX(0); opacity: 1; }
+            }
+        `;
+        document.head.appendChild(style);
+    </script>
+</body>
+</html>