Share retained app UI GL dispatch

docs/modernization/build-inventory.md

@@ -619,7 +619,11 @@ powershell -ExecutionPolicy Bypass -File scripts\automation\apple-remote-build.p
   blend/depth state query-restore, depth clear masks, active texture unit
   dispatch, and fallback 2D texture unbind dispatch; VR SDK start/stop now dispatches
   through `PlatformServices` while retaining the existing Windows OpenVR bridge
-  shape.
+  shape. Its retained callback endpoints now share `legacy_ui_gl_dispatch`
+  with app startup, app clear, app UI viewport/scissor, and command-convert
+  renderer state callbacks, so those files no longer duplicate local raw GL
+  adapter clusters for capability, blend, clear, viewport, scissor, active
+  texture, or 2D texture-unbind execution.
   Canvas mode overlay, mask, and transform paths also consume backend-owned
   blend/depth state execution, active texture unit dispatch, transform/cut
   viewport execution, 2D texture copy targets, and RGBA8 readback format tokens;

docs/modernization/roadmap.md

@@ -883,7 +883,8 @@ debug-output/debug-output-synchronous state enable sequence is now a tested
 Initial PanoPainter OpenGL depth/blend startup state is now represented and
 applied by tested `pp_renderer_gl` startup-state contracts; `App::init`
 delegates to the backend dispatch path instead of hard-coding the policy or
-operation order.
+operation order, and its retained callback endpoints now reuse the shared UI
+GL bridge instead of a local raw callback cluster.
 OpenGL runtime version/vendor/renderer/GLSL string queries now also use a
 tested `pp_renderer_gl` dispatch contract, leaving `App::init` to log the
 result while the backend owns the query set and order. The Windows entrypoint
@@ -891,19 +892,24 @@ also uses that contract for early context logging and renderer-name window
 title construction before replacing the temporary WGL context.
 The default app clear color and color-buffer clear operation now dispatch
 through `pp_renderer_gl` as well, moving another direct OpenGL operation out
-of `App::clear` while preserving the current gray clear behavior.
+of `App::clear` while preserving the current gray clear behavior; the live
+callback endpoints now share `legacy_ui_gl_dispatch`.
 Main app UI viewport and scissor execution now dispatch through tested
 `pp_renderer_gl` viewport/scissor contracts, leaving `App::draw` and UI node
 clipping to provide rectangles while the backend owns scissor-state tokens and
-the live OpenGL call sequence.
+the live OpenGL call sequence. The retained viewport/scissor callback endpoints
+now share `legacy_ui_gl_dispatch`.
 VR UI framebuffer viewport and scissor-test setup now also consumes those
 `pp_renderer_gl` contracts, keeping desktop and VR UI rendering aligned while
-the retained OpenVR app path is split incrementally.
+the retained OpenVR app path is split incrementally; its retained callback
+endpoints now reuse the shared UI GL bridge.
 VR draw blend/depth state snapshots, transitions, restore, and depth-buffer
 clears, active texture unit switches, and fallback 2D texture unbinds now use
 generic tested `pp_renderer_gl` capability query/apply, clear, active-texture,
 and texture-bind dispatch contracts, reducing direct OpenGL execution in the
-retained VR app path without changing state restore behavior.
+retained VR app path without changing state restore behavior. The remaining
+retained VR draw adapter endpoints for these calls now share
+`legacy_ui_gl_dispatch`.
 The retained `gl_state` save/restore utility now snapshots and restores through
 tested `pp_renderer_gl` saved-state dispatch contracts, covering capability
 state, viewport, clear color, framebuffer/program bindings, active texture,
@@ -2592,6 +2598,13 @@ Results:
   `legacy_gl_shader_dispatch`, and `legacy_gl_sampler_dispatch`, removing the
   local raw state/copy callback cluster from `src/util.cpp` while renderer
   state and framebuffer-copy execution remain retained under DEBT-0036.
+- Retained app startup, app clear, app UI viewport/scissor, command-convert
+  renderer state, and desktop VR draw-state endpoints now share
+  `legacy_ui_gl_dispatch` for capability, blend equation, clear, viewport,
+  scissor, active-texture, and 2D texture-unbind callbacks, removing duplicated
+  local raw callback clusters from `src/app.cpp`, `src/app_commands.cpp`, and
+  `src/app_vr.cpp` while app/VR renderer execution 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