standalone: VoxelForgeCore link-safe next to Unreal -- internals in vfcore::detail, symbol check

- The copied generator, mesher and Compat stand-ins compile inside vfcore::detail.
- CheckCoreSymbols.ps1 (run by Build.ps1) fails on any unqualified Unreal-style symbol in the
  library: 16,255 on 557f6aa, 0 now. A UE 5.7 CoreMinimal.h + VoxelForgeCore.h smoke compile passes.
- Output identical: 11 hash rows at W1/W8, routes 5642/5642, look/passage/far audits pass,
  bad-shell control fails, six captures byte-identical.
Cost, measured by me interleaved (8 workers, cold, 4 runs each, first run excluded): 0.963 s vs
0.937 s for 557f6aa, ~27 ms in shape compilation; same math, so codegen/inlining. To be found.

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

Standalone/Core/src/StandaloneSnapshotAdapter.h

@@ -1,12 +1,15 @@
 #pragma once
 
-#include "OwnerWorldLoader.h"
+#include "Json.h"
 #include "VoxelForgeCore/VoxelForgeCore.h"
 
-#include <memory>
+#include <string>
 
 namespace VoxelForgeCore
 {
-    // Private standalone adapter: keeps the compatibility holders behind the public value API.
-    ResolvedWorldSnapshot MakeStandaloneSnapshot(std::shared_ptr<FStandaloneOwnerWorld> owner);
+    // Standalone-only bridge. Core parses into its namespaced compatibility snapshot and applies
+    // the same command-line overrides as the viewer's reference loader.
+    ResolvedWorldSnapshot MakeStandaloneSnapshotFromParsedJson(const VFJson::Value& jsonRoot,
+        std::int32_t seed,std::int32_t clipRadius,std::int32_t maxLodOverride,
+        bool roundTunnels,bool enhancedTunnelWalls,std::string& error);
 }