Route grid render state through GL backend

docs/modernization/build-inventory.md

@@ -377,7 +377,10 @@ Known local toolchain state:
   backend-owned texture readback formats, sampler filters, depth/blend state,
   depth clears, viewport queries, color-mask booleans, active texture units,
   and float render-target formats; CPU lightmap row dispatch now uses shared
-  `parallel_for` instead of platform-specific worker APIs.
+  `parallel_for` instead of platform-specific worker APIs. Its live heightmap
+  draw and bake paths now execute depth/blend state changes, depth clears,
+  color-write-mask toggles, active texture selection, and bake viewport changes
+  through tested `pp_renderer_gl` dispatch adapters.
   Legacy `util.cpp` OpenGL error naming and `gl_state` save/restore also
   consume backend-owned error codes, state queries, framebuffer targets,
   texture binding targets, and active texture units.
@@ -648,6 +651,8 @@ Known local toolchain state:
   NodeStrokePreview texture-unit switches,
   tested viewport/scissor/capability dispatch consumed by retained Canvas,
   NodeCanvas, NodeStrokePreview, and HMD render-state paths,
+  tested color-write-mask dispatch consumed by retained `NodePanelGrid`
+  transparent heightmap rendering,
   tested pixel-buffer allocation/readback/map/unmap/delete dispatch
   consumed by retained `PBO` recording readbacks, tested framebuffer-to-texture
   copy dispatch consumed by retained canvas/UI paint paths and CanvasLayer