fix(animation): harden presentation phase handoffs

Own every borrowed PartArray frame across callbacks, version presentation state across appearance rebinding, reject recursive phase consumption, and preserve static MotionDone when only a stale visual pose is discarded.

src/AcDream.App/Rendering/LiveEntityAnimationState.cs

@@ -34,6 +34,8 @@ internal sealed class LiveEntityAnimationState : ILiveEntityAnimationRuntime
     public bool SequenceAdvancedBeforeAnimationPass;
     public readonly Frame RootMotionScratch = new();
     public readonly MotionDeltaFrame RootMotionDeltaScratch = new();
+    public readonly List<PartTransform> SequenceFramesScratch = new();
+    public readonly List<PartTransform> ScheduleFramesScratch = new();
 
     /// <summary>Reusable compact drawable channel, consumed before draw.</summary>
     public readonly List<MeshRef> MeshRefsScratch = new();
@@ -45,16 +47,40 @@ internal sealed class LiveEntityAnimationState : ILiveEntityAnimationRuntime
     /// </summary>
     public readonly List<Matrix4x4> VisualPartPosesScratch = new();
     public bool PresentationPosesInitialized;
+    public ulong PresentationRevision { get; private set; } = 1UL;
 
     public double LastSequenceDiagnosticTime;
     public double LastPartDiagnosticTime;
 
     public void InvalidatePresentationPoses()
     {
+        PresentationRevision++;
+        if (PresentationRevision == 0UL)
+            PresentationRevision++;
         PresentationPosesInitialized = false;
         VisualPartPosesScratch.Clear();
         EffectPartPosesScratch.Clear();
     }
+
+    public IReadOnlyList<PartTransform> CaptureSequenceFrames(
+        IReadOnlyList<PartTransform> source)
+    {
+        ArgumentNullException.ThrowIfNull(source);
+        SequenceFramesScratch.Clear();
+        for (int i = 0; i < source.Count; i++)
+            SequenceFramesScratch.Add(source[i]);
+        return SequenceFramesScratch;
+    }
+
+    public IReadOnlyList<PartTransform> CaptureScheduleFrames(
+        IReadOnlyList<PartTransform> source)
+    {
+        ArgumentNullException.ThrowIfNull(source);
+        ScheduleFramesScratch.Clear();
+        for (int i = 0; i < source.Count; i++)
+            ScheduleFramesScratch.Add(source[i]);
+        return ScheduleFramesScratch;
+    }
 }
 
 internal readonly record struct LiveAnimationPartTemplate(