feat(battle-node): PvP TurnEnd broadcast + flipped Retire/Kill result

Pvp TurnEnd/TurnEndFinal broadcasts TurnEnd+Judge to BOTH so each
client's JudgeOperation advances. Pvp Retire/Kill pushes BattleFinish
with flipped result (sender=Lose, other=Win). Scripted Retire keeps
Phase 1 behaviour (sender-only Win via BuildBattleFinishNoContest).

SVSim.BattleNode/Sessions/BattleSession.cs

@@ -130,16 +130,37 @@ public sealed class BattleSession
 
             case NetworkBattleUri.TurnEnd when phaseFrom?.Phase == BattleSessionPhase.AfterReady:
             case NetworkBattleUri.TurnEndFinal when phaseFrom?.Phase == BattleSessionPhase.AfterReady:
-                // Phase 1: forward the player's TurnEnd to the scripted bot. The bot's
+                if (Type == BattleType.Pvp && BothAfterReady())
-                // PushAsync fires its three-frame burst via FrameEmitted; each emitted
+                {
-                // frame loops back through HandleFrameAsync → ComputeFrames → routes to
+                    // Broadcast TurnEnd + Judge to BOTH. Each client's JudgeOperation ->
-                // the real participant. Net wire effect: same three pushes as v1.2.
+                    // ControlTurnStartPlayer advances the active-player state machine.
-                result.Add((other, env, false));
+                    var turnEndBroadcast = BuildTurnEndBroadcast();
+                    var judgeBroadcast = BuildJudgeBroadcast();
+                    result.Add((from, turnEndBroadcast, false));
+                    result.Add((other, turnEndBroadcast, false));
+                    result.Add((from, judgeBroadcast, false));
+                    result.Add((other, judgeBroadcast, false));
+                }
+                else if (Type == BattleType.Scripted)
+                {
+                    // Phase 1 Scripted: forward to bot; bot fires three-frame burst back.
+                    result.Add((other, env, false));
+                }
+                // For Bot type, no-op (NoOpBot swallows; client handles its own turn end).
                 break;
 
             case NetworkBattleUri.Retire:
             case NetworkBattleUri.Kill:
-                result.Add((from, BuildBattleFinishNoContest(), true));
+                if (Type == BattleType.Pvp)
+                {
+                    result.Add((from, BuildBattleFinish(BattleResult.Lose), true));
+                    result.Add((other, BuildBattleFinish(BattleResult.Win), true));
+                }
+                else
+                {
+                    // Scripted (and future Bot) — sender wins by default (no real opponent).
+                    result.Add((from, BuildBattleFinishNoContest(), true));
+                }
                 Phase = BattleSessionPhase.Terminal;
                 break;
 
@@ -220,6 +241,39 @@ public sealed class BattleSession
         PlaySeq: null,
         Body: new BattleFinishBody(Result: BattleResult.Win));
 
+    private MsgEnvelope BuildTurnEndBroadcast() => new(
+        NetworkBattleUri.TurnEnd,
+        ViewerId: ScriptedLifecycle.FakeOpponentViewerId,
+        Uuid: WireConstants.ServerUuid,
+        Bid: null,
+        Try: 0,
+        Cat: EmitCategory.Battle,
+        PubSeq: null,
+        PlaySeq: null,
+        Body: new TurnEndBody(TurnState: 0));
+
+    private MsgEnvelope BuildJudgeBroadcast() => new(
+        NetworkBattleUri.Judge,
+        ViewerId: ScriptedLifecycle.FakeOpponentViewerId,
+        Uuid: WireConstants.ServerUuid,
+        Bid: null,
+        Try: 0,
+        Cat: EmitCategory.Battle,
+        PubSeq: null,
+        PlaySeq: null,
+        Body: new JudgeBody(Spin: ScriptedProfiles.OpponentJudgeSpin));
+
+    private MsgEnvelope BuildBattleFinish(BattleResult result) => new(
+        NetworkBattleUri.BattleFinish,
+        ViewerId: ScriptedLifecycle.FakeOpponentViewerId,
+        Uuid: WireConstants.ServerUuid,
+        Bid: null,
+        Try: 0,
+        Cat: EmitCategory.Battle,
+        PubSeq: null,
+        PlaySeq: null,
+        Body: new BattleFinishBody(Result: result));
+
     private static IReadOnlyList<long> ExtractIdxList(MsgEnvelope env)
     {
         if (env.Body is not RawBody rawBody) return Array.Empty<long>();

SVSim.UnitTests/BattleNode/Sessions/BattleSessionDispatchTests.cs

@@ -340,6 +340,97 @@ public class BattleSessionDispatchTests
             "PvP gameplay forwarding must wait until BOTH sides reach AfterReady.");
     }
 
+    [Test]
+    public void Pvp_TurnEnd_from_A_in_BothAfterReady_broadcasts_TurnEnd_plus_Judge_to_both()
+    {
+        var (s, a, b) = NewPvpSession();
+        DriveToAfterReady(s, a);
+        DriveToAfterReady(s, b);
+
+        var routes = s.ComputeFrames(a, NewEnvelope(NetworkBattleUri.TurnEnd));
+
+        Assert.That(routes.Count, Is.EqualTo(4));
+        Assert.That(routes.Select(r => (r.Target, r.Frame.Uri)), Is.EquivalentTo(new[]
+        {
+            ((IBattleParticipant)a, NetworkBattleUri.TurnEnd),
+            ((IBattleParticipant)b, NetworkBattleUri.TurnEnd),
+            ((IBattleParticipant)a, NetworkBattleUri.Judge),
+            ((IBattleParticipant)b, NetworkBattleUri.Judge),
+        }));
+    }
+
+    [Test]
+    public void Pvp_TurnEndFinal_from_A_in_BothAfterReady_broadcasts_TurnEnd_plus_Judge_to_both()
+    {
+        var (s, a, b) = NewPvpSession();
+        DriveToAfterReady(s, a);
+        DriveToAfterReady(s, b);
+
+        var routes = s.ComputeFrames(a, NewEnvelope(NetworkBattleUri.TurnEndFinal));
+
+        Assert.That(routes.Count, Is.EqualTo(4));
+        Assert.That(routes.Select(r => r.Frame.Uri).Distinct(),
+            Is.EquivalentTo(new[] { NetworkBattleUri.TurnEnd, NetworkBattleUri.Judge }));
+    }
+
+    [Test]
+    public void Pvp_TurnEnd_when_B_still_AwaitingSwap_drops()
+    {
+        var (s, a, b) = NewPvpSession();
+        DriveToAfterReady(s, a);
+        // B not at AfterReady.
+
+        var routes = s.ComputeFrames(a, NewEnvelope(NetworkBattleUri.TurnEnd));
+
+        Assert.That(routes, Is.Empty);
+    }
+
+    [Test]
+    public void Pvp_Retire_from_A_pushes_BattleFinish_Lose_to_A_and_Win_to_B()
+    {
+        var (s, a, b) = NewPvpSession();
+        DriveToAfterReady(s, a);
+        DriveToAfterReady(s, b);
+
+        var routes = s.ComputeFrames(a, NewEnvelope(NetworkBattleUri.Retire));
+
+        Assert.That(routes.Count, Is.EqualTo(2));
+        var aRoute = routes.Single(r => ReferenceEquals(r.Target, a));
+        var bRoute = routes.Single(r => ReferenceEquals(r.Target, b));
+        Assert.That(aRoute.Frame.Uri, Is.EqualTo(NetworkBattleUri.BattleFinish));
+        Assert.That(((BattleFinishBody)aRoute.Frame.Body).Result, Is.EqualTo(BattleResult.Lose));
+        Assert.That(bRoute.Frame.Uri, Is.EqualTo(NetworkBattleUri.BattleFinish));
+        Assert.That(((BattleFinishBody)bRoute.Frame.Body).Result, Is.EqualTo(BattleResult.Win));
+        Assert.That(aRoute.NoStock, Is.True);
+        Assert.That(bRoute.NoStock, Is.True);
+        Assert.That(s.Phase, Is.EqualTo(BattleSessionPhase.Terminal));
+    }
+
+    [Test]
+    public void Pvp_Kill_from_A_same_as_Retire()
+    {
+        var (s, a, b) = NewPvpSession();
+        DriveToAfterReady(s, a);
+        DriveToAfterReady(s, b);
+
+        var routes = s.ComputeFrames(a, NewEnvelope(NetworkBattleUri.Kill));
+
+        Assert.That(routes.Count, Is.EqualTo(2));
+        Assert.That(s.Phase, Is.EqualTo(BattleSessionPhase.Terminal));
+    }
+
+    [Test]
+    public void Scripted_Retire_still_pushes_BattleFinish_Win_to_sender_only()
+    {
+        // Regression guard — Phase 1 behavior preserved for Scripted.
+        var (s, a, _) = NewSession();
+        var routes = s.ComputeFrames(a, NewEnvelope(NetworkBattleUri.Retire));
+
+        Assert.That(routes.Count, Is.EqualTo(1));
+        Assert.That(routes[0].Target, Is.SameAs(a));
+        Assert.That(((BattleFinishBody)routes[0].Frame.Body).Result, Is.EqualTo(BattleResult.Win));
+    }
+
     private static (BattleSession, FakeRealParticipant, FakeRealParticipant) NewPvpSession()
     {
         var a = new FakeRealParticipant(viewerId: 1001, PlayerACtx());