Share retained stroke sampler dispatch helpers

docs/modernization/tasks.md

@@ -509,6 +509,13 @@ Done Checks:
 
 Progress Notes:
 
+- 2026-06-13: `Canvas::stroke_draw` live-pass sampler bind/unbind plus
+  semantic texture-input dispatch now routes through retained stroke execution
+  helpers; concrete GL object mapping, framebuffer ownership, shader timing,
+  and final draw execution remain local to `Canvas`. Next slice should target
+  the remaining live draw execution boundary inside `stroke_draw_samples()` or
+  the final temporary-texture composite setup without reopening the landed
+  dirty, face-framebuffer, pad, or texture-intent helpers.
 - 2026-06-13: `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; mixer-pass