Share retained stroke face sample dispatch

docs/modernization/tasks.md

@@ -509,6 +509,13 @@ Done Checks:
 
 Progress Notes:
 
+- 2026-06-13: `Canvas::stroke_draw_samples()` now routes face-indexed
+  destination bind/copy/unbind and brush upload/draw through
+  `execute_legacy_canvas_stroke_face_sample_polygon(...)`; the retained sample
+  executor now owns the face-aware dispatch contract while `Canvas` keeps only
+  the concrete GL object callbacks. Next slice should target any remaining
+  final temporary-texture composite setup without reopening landed sample,
+  mix, sampler, dirty, face, or pad helpers.
 - 2026-06-13: `pp_paint_renderer_stroke_execution_tests` now also covers
   direct retained frame-sample callback ordering plus
   `execute_legacy_canvas_stroke_frame_samples_with_dirty_tracking(...)`