Share retained stroke sampler dispatch helpers

docs/modernization/debt.md

@@ -18,6 +18,11 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Recent Reductions
 
+- 2026-06-13: DEBT-0036 was narrowed again. `Canvas::stroke_draw` live-pass
+  sampler bind/unbind plus semantic texture-input dispatch now route through
+  retained stroke execution helpers; concrete GL object mapping, framebuffer
+  ownership, shader timing, and final draw execution remain retained in
+  `Canvas`.
 - 2026-06-13: DEBT-0036 was narrowed again. `NodeStrokePreview::stroke_draw_samples`
   now routes destination bind/unbind, framebuffer copy callback wrapping,
   sample-point assembly, and brush-vertex upload/draw through one local helper;