refactor(runtime): close simulation ownership

Move remote-motion construction, CreateObject vector initialization, final simulation-component retirement, and the combined J5 ownership ledger into Runtime. Delete App compatibility views and moved-state reconstruction while preserving the existing graphical projection and retail update order.

src/AcDream.App/World/LiveEntityRuntimeViews.cs

@@ -133,36 +133,3 @@ public sealed class LiveEntityAnimationRuntimeView<TAnimation>
             throw new NotSupportedException();
     }
 }
-
-/// <summary>Storage-free typed view over remote-motion components.</summary>
-public sealed class LiveEntityRemoteMotionRuntimeView<TRemoteMotion>
-    where TRemoteMotion : class, ILiveEntityRemoteMotionRuntime
-{
-    private readonly ILiveEntityRuntimeSource _runtime;
-
-    internal LiveEntityRemoteMotionRuntimeView(ILiveEntityRuntimeSource runtime) =>
-        _runtime = runtime ?? throw new ArgumentNullException(nameof(runtime));
-
-    public TRemoteMotion this[uint serverGuid]
-    {
-        set => (_runtime.Current
-            ?? throw new InvalidOperationException("Live entity runtime is not initialized."))
-            .SetRemoteMotionRuntime(serverGuid, value);
-    }
-
-    public bool TryGetValue(uint serverGuid, out TRemoteMotion motion)
-    {
-        if (_runtime.Current?.TryGetRemoteMotionRuntime(serverGuid, out var found) == true
-            && found is TRemoteMotion typed)
-        {
-            motion = typed;
-            return true;
-        }
-
-        motion = null!;
-        return false;
-    }
-
-    public bool Remove(uint serverGuid) =>
-        _runtime.Current?.ClearRemoteMotionRuntime(serverGuid) == true;
-}