fix(rendering): bound portal resource lifetime

Separate logical ownership, render publication, and GPU retirement across live entities, landblocks, particles, textures, mesh arenas, portal/UI teardown, and per-frame scratch storage. Add bounded DAT/texture caches, upload budgets, three-frame fence retirement, exact-incarnation appearance reconciliation, frame pacing, and extensive lifetime conformance coverage.\n\nThe seven-destination connected route now cuts peak working/private memory roughly in half, returns Caul to 125-153 FPS locally, and produces no WER or AMD reset.\n\nCo-authored-by: OpenAI Codex <codex@openai.com>

tests/AcDream.App.Tests/Rendering/ViewconeCullerReuseTests.cs

@@ -0,0 +1,60 @@
+using System.Numerics;
+using AcDream.App.Rendering;
+using Xunit;
+
+namespace AcDream.App.Tests.Rendering;
+
+public sealed class ViewconeCullerReuseTests
+{
+    [Fact]
+    public void ReusedCuller_ReplacesPriorCellAndOutsideState()
+    {
+        const uint firstCell = 0xA9B40100;
+        const uint secondCell = 0xA9B40101;
+        var clipFrame = ClipFrame.NoClip();
+        var assemblyScratch = new ClipFrameAssembly();
+        var culler = new ViewconeCuller();
+
+        var first = Frame(firstCell, includeOutside: true);
+        ClipFrameAssembly firstAssembly = ClipFrameAssembler.Assemble(
+            clipFrame,
+            first,
+            assemblyScratch);
+        Assert.Same(culler, ViewconeCuller.Build(firstAssembly, Matrix4x4.Identity, culler));
+        Assert.True(culler.SphereVisibleInCell(firstCell, Vector3.Zero, 0f));
+        Assert.True(culler.SphereVisibleOutside(Vector3.Zero, 0f));
+
+        var second = Frame(secondCell, includeOutside: false);
+        ClipFrameAssembly secondAssembly = ClipFrameAssembler.Assemble(
+            clipFrame,
+            second,
+            assemblyScratch);
+        Assert.Same(culler, ViewconeCuller.Build(secondAssembly, Matrix4x4.Identity, culler));
+
+        Assert.False(culler.SphereVisibleInCell(firstCell, Vector3.Zero, 0f));
+        Assert.True(culler.SphereVisibleInCell(secondCell, Vector3.Zero, 0f));
+        Assert.False(culler.SphereVisibleInCell(secondCell, new Vector3(2f, 0f, 0f), 0f));
+        Assert.False(culler.SphereVisibleOutside(Vector3.Zero, 0f));
+    }
+
+    private static PortalVisibilityFrame Frame(uint cellId, bool includeOutside)
+    {
+        var result = new PortalVisibilityFrame();
+        var cellView = new CellView();
+        cellView.Add(Square(0.5f));
+        result.CellViews.Add(cellId, cellView);
+        result.OrderedVisibleCells.Add(cellId);
+        if (includeOutside)
+            result.OutsideView.Add(Square(0.5f));
+        return result;
+    }
+
+    private static ViewPolygon Square(float half)
+        => new(new[]
+        {
+            new Vector2(-half, -half),
+            new Vector2(half, -half),
+            new Vector2(half, half),
+            new Vector2(-half, half),
+        });
+}