feat(battle-node): BattleResult enum for BattleFinish.result wire codes

SVSim.BattleNode/Lifecycle/ScriptedProfiles.cs

@@ -66,7 +66,4 @@ internal static class ScriptedProfiles
     // display state. v1 doesn't simulate the opponent — once this lands,
     // the client sits there indefinitely.
     public const int OpponentTurnStartSpin = 100;
-
-    // BattleFinish result code for v1 no-contest finishes (player wins).
-    public const int BattleResultPlayerWins = 1;
 }

SVSim.BattleNode/Protocol/BattleResult.cs

@@ -0,0 +1,19 @@
+namespace SVSim.BattleNode.Protocol;
+
+/// <summary>
+/// Wire value of <c>result</c> on a BattleFinish frame. The client's
+/// <c>BattleFinishResponsProcessing</c> switch maps these as:
+/// 0 → LOSE, 1 → WIN, 2 → CONSISTENCY (desync / action-list mismatch).
+/// </summary>
+/// <remarks>
+/// This is NOT the same as the client's in-memory <c>BATTLE_RESULT_TYPE</c> enum
+/// (NONE=0, WIN=1, LOSE=2, CONSISTENCY=3) — the wire codes shift LOSE down to 0.
+/// Always serialize as the int value, not the name; see the
+/// <c>JsonNumberEnumConverter</c> on <see cref="Bodies.BattleFinishBody.Result"/>.
+/// </remarks>
+public enum BattleResult
+{
+    Lose = 0,
+    Win = 1,
+    Consistency = 2,
+}

SVSim.BattleNode/Protocol/Bodies/BattleFinishBody.cs

@@ -3,5 +3,7 @@ using System.Text.Json.Serialization;
 namespace SVSim.BattleNode.Protocol.Bodies;
 
 public sealed record BattleFinishBody(
-    [property: JsonPropertyName("result")] int Result,
+    [property: JsonPropertyName("result")]
+    [property: JsonConverter(typeof(JsonNumberEnumConverter<BattleResult>))]
+    BattleResult Result,
     [property: JsonPropertyName("resultCode")] int ResultCode = 1) : IMsgBody;

SVSim.BattleNode/Sessions/BattleSession.cs

@@ -289,7 +289,7 @@ public sealed class BattleSession
         Cat: EmitCategory.Battle,
         PubSeq: null,
         PlaySeq: null,
-        Body: new BattleFinishBody(Result: ScriptedProfiles.BattleResultPlayerWins));
+        Body: new BattleFinishBody(Result: BattleResult.Win));
 
     private static IReadOnlyList<long> ExtractIdxList(MsgEnvelope env)
     {