Route RTT utility clears through GL backend

docs/modernization/roadmap.md

@@ -825,6 +825,10 @@ MP4 execution remain tracked by DEBT-0037.
 Legacy `RTT::bindFramebuffer` and `RTT::unbindFramebuffer` now use tested
 `pp_renderer_gl` draw/read framebuffer binding snapshot and restore contracts,
 moving render-target pass entry/exit state management behind the backend.
+Legacy `RTT::clear`, `RTT::clear_mask`, `RTT::bindTexture`, and
+`RTT::unbindTexture` now dispatch through `pp_renderer_gl` clear,
+color-write-mask restore, and texture-bind contracts, keeping render-target
+utility operations behind the backend boundary.
 Windows RenderDoc frame capture hooks now also dispatch through
 `PlatformServices`, keeping capture integration in the platform service while
 leaving non-Windows adapters as no-ops.
@@ -1020,9 +1024,11 @@ contracts. 2D framebuffer-to-texture
 copies used by canvas, transform, layer-conversion, panorama UI, and brush
 preview paths now route through a tested `pp_renderer_gl` copy dispatch via the
 retained `copy_framebuffer_to_texture_2d` utility bridge; the remaining cube-map
-copy is tracked under `DEBT-0036`. RTT clear color/depth masks, renderer API render-pass
-color/depth/stencil clear-mask and clear-value mapping, and color-write-mask query tokens also
-live in `pp_renderer_gl`. `RTT` no longer spells GL enum names directly.
+copy is tracked under `DEBT-0036`. RTT render-target clear, masked color clear
+with color-write-mask restore, and texture bind/unbind dispatch now execute
+through `pp_renderer_gl`; renderer API render-pass color/depth/stencil
+clear-mask and clear-value mapping, and color-write-mask query tokens also live
+there. `RTT` no longer spells GL enum names directly.
 Renderer API primitive-topology to OpenGL draw-mode mapping, mesh index-type
 and primitive-mode decisions used by legacy `Shape` drawing, plus Shape buffer
 targets, static upload usage, and vertex attribute component/normalization