新增 Mjpegplayer 用来播放 Web 流

SHH.Contracts.Grpc/Payloads/StatusEventPayload.cs

@@ -0,0 +1,23 @@
+namespace SHH.Contracts
+{
+    /// <summary>
+    /// [控制面] 设备状态变更通知包
+    /// </summary>
+    public class StatusEventPayload
+    {
+        /// <summary>摄像头ID</summary>
+        public string CameraId { get; set; } = string.Empty;
+
+        /// <summary>IP地址</summary>
+        public string IpAddress { get; set; } = string.Empty;
+
+        /// <summary>true: 上线/活跃, false: 离线/超时</summary>
+        public bool IsOnline { get; set; }
+
+        /// <summary>变更原因 (e.g. "Ping Success", "Frame Timeout")</summary>
+        public string Reason { get; set; } = string.Empty;
+
+        /// <summary>时间戳</summary>
+        public long Timestamp { get; set; }
+    }
+}