Route cube textures and samplers through renderer GL

docs/modernization/build-inventory.md

@@ -212,6 +212,9 @@ Known local toolchain state:
   border-color parameter mapping used by legacy `Sampler`, plus renderer API
   sampler filter/address-mode to OpenGL token mapping including mirrored-repeat
   and aggregate renderer API sampler-state to OpenGL min/mag/wrap mapping.
+  Legacy `TextureCube` allocation/bind/delete and legacy `Sampler`
+  create/configure/border/bind/unbind calls now consume those resource dispatch
+  contracts directly from the retained app utilities.
   The PanoPainter
   shader attribute binding catalog, shader stage tokens, compile/link status
   queries, active-uniform count query, and matrix-uniform transpose token used

docs/modernization/roadmap.md

@@ -1109,6 +1109,10 @@ Results:
   Sampler parameter validation covers wrap S/T/R plus min/mag filter ordering
   used by legacy `Sampler::set` and `Sampler::set_filter`, plus the desktop
   border-color parameter name used by `Sampler::set_border`.
+  Legacy `TextureCube` allocation/bind/delete and `Sampler`
+  create/configure/border/bind/unbind paths now execute through tested
+  `pp_renderer_gl` dispatch contracts, keeping cube-map and sampler resource
+  lifecycle reachable without a live GL context.
   Shader attribute binding catalog validation covers the current `pos`, `uvs`,
   `uvs2`, `col`, and `nor` bindings and rejects empty, unnamed, null-name, and
   duplicate-name catalogs while preserving legacy shared locations. Shader