Extract OpenGL shader uniform catalog

docs/modernization/build-inventory.md

@@ -133,7 +133,9 @@ Known local toolchain state:
   framebuffer status naming used by `RTT` diagnostics. It also validates
   Shape index-type and fill/stroke primitive-mode mapping used by the legacy
   mesh draw path, plus the PanoPainter shader attribute binding catalog used
-  by legacy `Shader` creation.
+  by legacy `Shader` creation. It also owns the PanoPainter shader uniform
+  catalog and legacy hash mapping used by `Shader` active-uniform discovery and
+  the uniform uniqueness check.
 - `windows-msvc-vcpkg-headless` validates manifest install/configure/build/test
   for the current headless component matrix; see DEBT-0007 for remaining app
   and platform triplet migration.

docs/modernization/roadmap.md

@@ -395,8 +395,10 @@ format mapping for `Texture2D` image uploads and framebuffer status naming for
 extension, upload-format, framebuffer diagnostic, and mesh draw-mode
 interpretation to that backend library. The PanoPainter shader attribute
 binding catalog also lives in `pp_renderer_gl` and is consumed by legacy
-`Shader` creation. The existing renderer classes are not yet fully behind the
-renderer interfaces.
+`Shader` creation. Shader uniform hashing, catalog validation, active-uniform
+mapping, and the legacy uniform uniqueness check now delegate to
+`pp_renderer_gl` as well. The existing renderer classes are not yet fully
+behind the renderer interfaces.
 
 Implementation tasks:
 
@@ -641,7 +643,9 @@ Results:
   mode mapping. 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.
+  locations. Shader uniform catalog validation covers the 43 legacy uniform
+  names used by `Shader`, preserves the legacy hash ids, and rejects empty,
+  unnamed, null-name, mismatched-hash, and duplicate-name catalogs.
 - PowerShell analyze automation returns JSON summaries and includes the shader
   validation target.
 - `windows-msvc-vcpkg-headless` configured through the Visual Studio bundled