Move VR render state mapping to renderer gl

docs/modernization/roadmap.md

@@ -742,6 +742,10 @@ Results:
   and runtime `data/` copy.
 - Android arm64 configured with NDK 29.0.14206865 through the platform-build
   wrapper and compiled headless foundation/tool/test targets.
+- Desktop VR drawing now routes generic OpenGL scissor/depth/blend state,
+  depth clears, active texture units, and fallback 2D texture unbinds through
+  the renderer GL backend mapping; platform VR SDK bridges remain isolated for
+  later platform-shell extraction.
 - Known remaining warnings: legacy project/vendor diagnostics, Visual Studio
   vcpkg-manifest warning, `LNK4099` missing libyuv PDBs, and `LNK4098` runtime
   library conflict from retained vendor binaries.