Update front and fix back

src/Managing.Api/Models/Responses/AgentSummaryViewModel.cs

@@ -50,95 +50,95 @@ namespace Managing.Api.Models.Responses
         /// <summary>
         /// Total number of agents on the platform
         /// </summary>
-        public int TotalAgents { get; set; }
+        public required int TotalAgents { get; set; }
         
         /// <summary>
         /// Total number of active strategies across all agents
         /// </summary>
-        public int TotalActiveStrategies { get; set; }
+        public required int TotalActiveStrategies { get; set; }
         
         /// <summary>
         /// Total platform-wide profit and loss in USD
         /// </summary>
-        public decimal TotalPlatformPnL { get; set; }
+        public required decimal TotalPlatformPnL { get; set; }
         
         /// <summary>
         /// Total volume traded across all agents in USD
         /// </summary>
-        public decimal TotalPlatformVolume { get; set; }
+        public required decimal TotalPlatformVolume { get; set; }
         
         /// <summary>
         /// Total volume traded across all agents in the last 24 hours in USD
         /// </summary>
-        public decimal TotalPlatformVolumeLast24h { get; set; }
+        public required decimal TotalPlatformVolumeLast24h { get; set; }
         
         /// <summary>
         /// Total open interest across all positions in USD
         /// </summary>
-        public decimal TotalOpenInterest { get; set; }
+        public required decimal TotalOpenInterest { get; set; }
         
         /// <summary>
         /// Total number of open positions across all strategies
         /// </summary>
-        public int TotalPositionCount { get; set; }
+        public required int TotalPositionCount { get; set; }
         
         // 24-hour changes
         /// <summary>
         /// Change in agent count over the last 24 hours
         /// </summary>
-        public int AgentsChange24h { get; set; }
+        public required int AgentsChange24h { get; set; }
         
         /// <summary>
         /// Change in strategy count over the last 24 hours
         /// </summary>
-        public int StrategiesChange24h { get; set; }
+        public required int StrategiesChange24h { get; set; }
         
         /// <summary>
         /// Change in PnL over the last 24 hours
         /// </summary>
-        public decimal PnLChange24h { get; set; }
+        public required decimal PnLChange24h { get; set; }
         
         /// <summary>
         /// Change in volume over the last 24 hours
         /// </summary>
-        public decimal VolumeChange24h { get; set; }
+        public required decimal VolumeChange24h { get; set; }
         
         /// <summary>
         /// Change in open interest over the last 24 hours
         /// </summary>
-        public decimal OpenInterestChange24h { get; set; }
+        public required decimal OpenInterestChange24h { get; set; }
         
         /// <summary>
         /// Change in position count over the last 24 hours
         /// </summary>
-        public int PositionCountChange24h { get; set; }
+        public required int PositionCountChange24h { get; set; }
         
         // Breakdowns
         /// <summary>
         /// Volume breakdown by asset/ticker
         /// </summary>
-        public Dictionary<string, decimal> VolumeByAsset { get; set; } = new();
+        public required Dictionary<string, decimal> VolumeByAsset { get; set; }
         
         /// <summary>
         /// Position count breakdown by asset/ticker
         /// </summary>
-        public Dictionary<string, int> PositionCountByAsset { get; set; } = new();
+        public required Dictionary<string, int> PositionCountByAsset { get; set; }
         
         /// <summary>
         /// Position count breakdown by direction (Long/Short)
         /// </summary>
-        public Dictionary<string, int> PositionCountByDirection { get; set; } = new();
+        public required Dictionary<string, int> PositionCountByDirection { get; set; }
         
         // Metadata
         /// <summary>
         /// When the data was last updated
         /// </summary>
-        public DateTime LastUpdated { get; set; }
+        public required DateTime LastUpdated { get; set; }
         
         /// <summary>
         /// When the last 24-hour snapshot was taken
         /// </summary>
-        public DateTime Last24HourSnapshot { get; set; }
+        public required DateTime Last24HourSnapshot { get; set; }
     }
     
     /// <summary>