Share retained shader dispatch bridge

docs/modernization/build-inventory.md

@@ -490,12 +490,11 @@ powershell -ExecutionPolicy Bypass -File scripts\automation\apple-remote-build.p
   `Shader` no longer spells GL enum
   names directly. It also owns the PanoPainter shader uniform catalog and legacy hash
   mapping used by `Shader` active-uniform discovery and the uniform uniqueness
-  check. Legacy `Shader` program use/delete, uniform writes, and
-  attribute-location lookup now consume tested dispatch contracts here.
-  Legacy shader source compilation, shader deletion, program attach/link,
-  attribute rebinding, active-uniform count/enumeration, and uniform-location
-  discovery now consume tested dispatch contracts as well, leaving the retained
-  shader utility with thin GL adapter functions.
+  check. Legacy `Shader` program use/delete, uniform writes,
+  attribute-location lookup, shader source compilation, shader deletion,
+  program attach/link, attribute rebinding, active-uniform count/enumeration,
+  and uniform-location discovery now consume tested dispatch contracts here
+  through `legacy_gl_shader_dispatch`.
   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

docs/modernization/roadmap.md

@@ -1193,7 +1193,11 @@ mapping, including mirrored-repeat, and aggregate renderer API sampler-state to
 OpenGL min/mag/wrap mapping are also tested there. The PanoPainter shader attribute
 binding catalog, shader stage tokens, compile/link status queries, active-uniform
 count query, and matrix-uniform transpose token also live in `pp_renderer_gl`
-and are consumed by legacy `Shader` creation. Renderer API blend factor/op to
+and are consumed by legacy `Shader` creation; retained shader source
+compilation/deletion, program attach/link/use/delete, attribute rebinding and
+location lookup, active-uniform enumeration, uniform-location discovery, and
+uniform writes now share the retained `legacy_gl_shader_dispatch` raw callback
+bridge. Renderer API blend factor/op to
 OpenGL token mapping also lives in `pp_renderer_gl`, with explicit support flags
 so `GL_ZERO` remains distinguishable from unsupported enum values. Aggregate
 renderer API blend-state to OpenGL enable/factor/equation/color-mask mapping,
@@ -2317,12 +2321,11 @@ Results:
   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.
-  Legacy `Shader` program use/delete, uniform writes, and attribute-location
-  lookups now execute through tested `pp_renderer_gl` dispatch contracts.
-  Legacy shader source compilation, shader deletion, program attach/link,
+  Legacy `Shader` program use/delete, uniform writes, attribute-location
+  lookups, shader source compilation, shader deletion, program attach/link,
   attribute rebinding, active-uniform count/enumeration, and uniform-location
-  discovery also execute through tested `pp_renderer_gl` dispatch contracts,
-  leaving only thin GL adapter functions in the retained `Shader` utility.
+  discovery now execute through tested `pp_renderer_gl` dispatch contracts via
+  `legacy_gl_shader_dispatch`.
   Retained `Shape`, `TextMesh`, and `NodeColorWheel` mesh buffer/VAO creation,
   zero-byte dynamic-buffer creation, dynamic buffer uploads, indexed and
   non-indexed draws, and resource deletion now execute through tested
@@ -2576,6 +2579,12 @@ Results:
   now share `legacy_gl_mesh_dispatch`, removing duplicated raw mesh callback
   clusters from `src/shape.cpp`, `src/font.cpp`, and `src/node_colorwheel.cpp`
   while mesh resource ownership remains retained under DEBT-0036.
+- Retained shader source compilation/deletion, program attach/link/use/delete,
+  attribute rebinding and location lookup, active-uniform enumeration,
+  uniform-location discovery, and vec/mat/scalar uniform writes now share
+  `legacy_gl_shader_dispatch`, removing duplicated raw shader/program/uniform
+  callback ownership from `src/shader.cpp` while shader-program ownership
+  remains retained under DEBT-0036.
 - Canvas draw-merge shader-blend selection now consumes the extracted
   `pp_paint_renderer` stroke composite planner for current layer and primary
   brush blend modes, while preserving legacy OpenGL compositing execution under