feat(battle-node): JudgeHandler emits {spin:0} to opponent in PvP

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

SVSim.BattleNode/Sessions/Dispatch/Handlers/JudgeHandler.cs

@@ -1,4 +1,5 @@
 using SVSim.BattleNode.Protocol;
+using SVSim.BattleNode.Protocol.Bodies;
 
 namespace SVSim.BattleNode.Sessions.Dispatch.Handlers;
 
@@ -6,9 +7,18 @@ internal sealed class JudgeHandler : IFrameHandler
 {
     public IReadOnlyList<DispatchRoute> Handle(FrameDispatchContext ctx)
     {
-        // Only a scripted-bot Judge is forwarded. A real player's Judge has no routing rule (drops).
+        // Scripted-bot Judge (test stub): forward verbatim (carries the {spin} shape already).
         if (ctx.IsScriptedBot(ctx.From))
             return new[] { new DispatchRoute(ctx.Other, ctx.Env, false) };
+
+        // PvP: active player's Judge{battleCode} -> opponent {spin} (RNG catch-up; spin=0 for the
+        // deterministic-turn slice). Receiving Judge starts the opponent's own turn.
+        if (ctx.Type == BattleType.Pvp && ctx.BothAfterReady())
+        {
+            var frame = ctx.Env with { Body = new JudgeBody(Spin: 0) };
+            return new[] { new DispatchRoute(ctx.Other, frame, false) };
+        }
+
         return Array.Empty<DispatchRoute>();
     }
 }