fix #208: keep combat bar hidden in peace mode

Treat combat-window visibility as gameplay-state owned so character layout restoration cannot replay a stale visible bit. Reset combat state to NonCombat at character-session entry, matching retail ClientCombatSystem::Begin.

Co-Authored-By: Codex <codex@openai.com>

src/AcDream.App/Rendering/GameWindow.cs

@@ -2486,6 +2486,7 @@ public sealed class GameWindow : IDisposable
             _worldState.MarkPersistent(chosen.Id);
             AcDream.App.Streaming.EntityVanishProbe.PlayerGuid = chosen.Id;  // TEMP #138-B probe
             Console.WriteLine($"live: entering world as 0x{chosen.Id:X8} {chosen.Name}");
+            Combat.Clear();
             _liveSession.EnterWorld(user, characterIndex: 0);
 
             _activeToonKey = chosen.Name;