feat(rendering): journal static scene projections

Append exact static and EnvCell-shell projection deltas only at committed spatial activation and detach receipts. Same-landblock rehydrate now reconciles retained, new, and omitted presentation identities without constructing or drawing the shadow scene in production.

Co-authored-by: Erik Nilsson <erikn@users.noreply.github.com>

tests/AcDream.App.Tests/Streaming/LandblockPresentationPipelineTests.cs

@@ -1,6 +1,7 @@
 using System.Collections.Immutable;
 using System.Numerics;
 using AcDream.App.Rendering;
+using AcDream.App.Rendering.Scene;
 using AcDream.App.Rendering.Wb;
 using AcDream.App.Streaming;
 using AcDream.App.World;
@@ -989,6 +990,40 @@ public sealed class LandblockPresentationPipelineTests
         Assert.Equal(2, meshes.PinAttempts);
     }
 
+    [Fact]
+    public void StaticRenderProjection_ReconcilesOnlyAfterSuccessfulSpatialActivation()
+    {
+        const uint landblockId = 0x6363FFFFu;
+        var meshes = new FailFirstPreparedPinAdapter();
+        var state = new GpuWorldState(new LandblockSpawnAdapter(meshes));
+        var journal = new RenderProjectionJournal(
+            RenderSceneGeneration.FromRaw(1));
+        var statics = new StaticRenderProjectionJournal(journal);
+        LandblockBuild build = BuildWithShell(landblockId, Entity(32));
+        var result = new LandblockStreamResult.Loaded(
+            landblockId,
+            LandblockStreamTier.Near,
+            build,
+            EmptyMesh());
+        var pipeline = new LandblockPresentationPipeline(
+            static (_, _) => { },
+            state,
+            staticProjectionSink: statics);
+
+        Assert.Throws<InvalidOperationException>(
+            () => pipeline.PublishLoaded(result));
+        Assert.Equal(0, journal.Count);
+        Assert.Equal(0, statics.ProjectionCount);
+
+        pipeline.PublishLoaded(result);
+
+        Assert.Equal(2, journal.Count);
+        Assert.Equal(2, statics.ProjectionCount);
+        Assert.Equal(2, meshes.PinAttempts);
+        pipeline.PublishLoaded(result);
+        Assert.Equal(2, journal.Count);
+    }
+
     [Fact]
     public void PriorityFailure_PreservesFailingResultAndUntouchedDrainedSuffix()
     {