Move convert GL state into renderer backend

docs/modernization/roadmap.md

@@ -766,7 +766,10 @@ preserving the previous Windows/macOS program-point-size and line-smoothing
 enablement while removing the Windows/macOS branch from `App::init`. The
 Windows service now delegates the actual OpenGL program-point-size and
 line-smooth enable sequence to a tested `pp_renderer_gl` dispatch helper, so
-the platform shell no longer owns those backend state tokens.
+the platform shell no longer owns those backend state tokens. The legacy
+non-Windows fallback now consumes the same helper for retained macOS render
+platform hints, keeping the debt-tracked adapter as a thin GL call bridge
+rather than a source of backend state policy.
 Windows OpenGL debug callback setup now dispatches through `PlatformServices`,
 moving Win32 console coloring and debug-break callback behavior into
 `WindowsPlatformServices` while keeping other platform adapters as no-ops; the
@@ -1029,7 +1032,9 @@ directly. App OpenGL initialization debug severity, debug output, GL info
 string, renderer API viewport/scissor rect conversion, default
 depth/program-point/line-smooth state, blend factor/equation, and UI
 render-target RGBA8 format tokens are now also cataloged and tested in
-`pp_renderer_gl`; the legacy convert command and resize path consume the same
+`pp_renderer_gl`; the legacy convert command now applies its depth,
+program-point-size, source-alpha blend, and add-equation startup policy through
+a tested backend dispatch contract, and the resize path consumes the same
 backend-owned mapping. App clear color-buffer masks, default framebuffer
 binding, scissor state, and sampler filter/wrap tokens now share that backend
 mapping too. OpenGL extension enumeration query tokens used before runtime