fix(rendering): synchronize hidden live projections

Inbound state continues while portal reveal blocks ordinary world simulation. Synchronize only the derived render projection after those hidden-frame network and command phases so the first revealed draw cannot observe a stale live transform, without advancing effects, particles, attachments, or lights.

src/AcDream.App/Update/LiveObjectFrameController.cs

@@ -34,6 +34,17 @@ internal interface ILiveSpatialReconcilePhase
     void Reconcile();
 }
 
+/// <summary>
+/// Keeps the derived render projection synchronized after inbound mutation
+/// while normal world simulation/presentation is blocked by portal reveal.
+/// This is deliberately narrower than full spatial reconciliation: hidden
+/// frames must not advance particles, effects, attachments, or lights.
+/// </summary>
+internal interface IRenderProjectionSyncPhase
+{
+    void SynchronizeActiveSources();
+}
+
 internal interface IParticleRangeSource
 {
     float RangeMultiplier { get; }