Unity U3: Add SimStatusModel.cs + SimStartResponse (#48)

This file defines the SimStatusModel and SimStartResponse classes for mapping JSON responses from the API.

unity-client/Assets/Scripts/Models/SimStatusModel.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace CommanderAILab.Models
+{
+    /// <summary>Maps to StartResponse from /api/lab/start.</summary>
+    [Serializable]
+    public class SimStartResponse
+    {
+        [JsonProperty("batchId")] public string batchId;
+        [JsonProperty("status")] public string status;
+        [JsonProperty("message")] public string message;
+
+        public override string ToString() => $"Batch {batchId}: {status}";
+    }
+
+    /// <summary>Maps to StatusResponse from /api/lab/status/{id}.</summary>
+    [Serializable]
+    public class SimStatusModel
+    {
+        [JsonProperty("batchId")] public string batchId;
+        [JsonProperty("running")] public bool running;
+        [JsonProperty("completed")] public int completed;
+        [JsonProperty("total")] public int total;
+        [JsonProperty("threads")] public int threads;
+        [JsonProperty("elapsedMs")] public int elapsedMs;
+        [JsonProperty("error")] public string error;
+        [JsonProperty("simsPerSec")] public float simsPerSec;
+        [JsonProperty("run_id")] public string runId;
+        [JsonProperty("games_completed")] public int gamesCompleted;
+        [JsonProperty("total_games")] public int totalGames;
+        [JsonProperty("current_decks")] public List<string> currentDecks;
+
+        public override string ToString() => $"Batch {batchId}: {completed}/{total} ({(running ? "running" : "done")})";
+    }
+}