add: 添加自动对焦逻辑（还没写完）

server/src/Services/HttpVideoStreamService.cs

@@ -1030,4 +1030,98 @@ public class HttpVideoStreamService : BackgroundService
             (1280, 720, "1280x720 (HD)")
         };
     }
+
+    #region 自动对焦功能
+
+    /// <summary>
+    /// 检查摄像头是否已配置
+    /// </summary>
+    /// <returns>是否已配置</returns>
+    public bool IsCameraConfigured()
+    {
+        lock (_cameraLock)
+        {
+            return _camera != null && !string.IsNullOrEmpty(_cameraAddress);
+        }
+    }
+
+    /// <summary>
+    /// 初始化摄像头自动对焦功能
+    /// </summary>
+    /// <returns>初始化结果</returns>
+    public async Task<bool> InitAutoFocusAsync()
+    {
+        try
+        {
+            lock (_cameraLock)
+            {
+                if (_camera == null)
+                {
+                    logger.Error("摄像头未配置，无法初始化自动对焦");
+                    return false;
+                }
+            }
+
+            logger.Info("开始初始化摄像头自动对焦功能");
+            
+            var result = await _camera!.InitAutoFocus();
+            
+            if (result.IsSuccessful && result.Value)
+            {
+                logger.Info("摄像头自动对焦功能初始化成功");
+                return true;
+            }
+            else
+            {
+                logger.Error($"摄像头自动对焦功能初始化失败: {result.Error?.Message ?? "未知错误"}");
+                return false;
+            }
+        }
+        catch (Exception ex)
+        {
+            logger.Error(ex, "初始化摄像头自动对焦功能时发生异常");
+            return false;
+        }
+    }
+
+    /// <summary>
+    /// 执行摄像头自动对焦
+    /// </summary>
+    /// <returns>对焦结果</returns>
+    public async Task<bool> PerformAutoFocusAsync()
+    {
+        try
+        {
+            lock (_cameraLock)
+            {
+                if (_camera == null)
+                {
+                    logger.Error("摄像头未配置，无法执行自动对焦");
+                    return false;
+                }
+            }
+
+            logger.Info("开始执行摄像头自动对焦");
+            
+            var result = await _camera!.PerformAutoFocus();
+            
+            if (result.IsSuccessful && result.Value)
+            {
+                logger.Info("摄像头自动对焦执行成功");
+                return true;
+            }
+            else
+            {
+                logger.Error($"摄像头自动对焦执行失败: {result.Error?.Message ?? "未知错误"}");
+                return false;
+            }
+        }
+        catch (Exception ex)
+        {
+            logger.Error(ex, "执行摄像头自动对焦时发生异常");
+            return false;
+        }
+    }
+
+    #endregion
 }