standalone: the owner's world outside Unreal -- bit-identical density, D3D11 fly-through viewer

Standalone/ (C++20, MSVC /O2 /arch:AVX2 /fp:precise, Build.ps1): copied density pipeline, op stack,
cave morphology, passages, strate manager/composer, noise, DetSinCos, mesher, clipmap selection,
with a UE compatibility layer (Compat/). Owner data exported once to Standalone/data/owner_world.json
by a default-off explore-commandlet exporter (the only plugin-source change). 25 cm voxels.
Parity: seed 0, 3,436 samples (strate edges, negative/far coords, rooms, tunnels, passages,
landings): bit-identical. Viewer: full 7-level clipmap, per-level toggles 1-7, T = round winding
tunnels (standalone option), N/P seed, F wireframe.
Timing NOT yet a baseline: 515 s for 12,054 tiles (L0 70 s, L6 296 s); the compat TMap/TSet are
vector-backed with linear lookup, which the plugin's caches do not expect.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MmSoF64BbRFmk9C3p1VsBJ

Standalone/Compat/StandaloneDataAssetGlue.cpp

@@ -0,0 +1,32 @@
+#include "VoxelSeasonAsset.h"
+#include "VoxelSeasonManifest.h"
+#include "VoxelStrateDefinition.h"
+#include "VoxelStartupTrace.h"
+
+// The owner's exported settings have no active Season reference. Engine deserialization already
+// ran the version migration before export, so the standalone data holder only reapplies the
+// current normalized compatibility field.
+void UVoxelStrateDefinition::PostLoad()
+{
+    GenerationParams.bTunnelFloorEnabled = true;
+}
+
+bool UVoxelSeasonAsset::LoadManifest(FVoxelSeasonManifest& OutManifest, FString& OutReport) const
+{
+    OutManifest = FVoxelSeasonManifest();
+    OutReport = TEXT("Standalone owner snapshot has no active season manifest.");
+    return false;
+}
+
+namespace VoxelForgeStartupTrace
+{
+    void BeginFromCommandLine() {}
+    bool IsActive() { return false; }
+    void RecordEvent(const TCHAR*, const FString&) {}
+    void StageBegin(const TCHAR*) {}
+    void StageEnd(const TCHAR*) {}
+    void RecordTile(const FTileSample&) {}
+    void Finish(const TCHAR*) {}
+    FStageScope::FStageScope(const TCHAR*) {}
+    FStageScope::~FStageScope() = default;
+}