Wire stroke commit service boundary

docs/modernization/debt.md

@@ -178,6 +178,10 @@ agent or engineer to remove them without reconstructing context from chat.
   `execute_legacy_canvas_draw_merge_layer_composite(...)`; the retained path
   still owns the concrete temporary-stroke, layer-texture, and layer-blend
   callback bodies.
+- 2026-06-13: DEBT-0036 was narrowed again. `Canvas::stroke_commit()` now
+  routes the remaining service wiring through `make_canvas_stroke_commit_request(...)`;
+  the retained path still owns the concrete history mutation and layer dirty
+  box updates.
 - 2026-06-13: DEBT-0036 was narrowed again. `Canvas::stroke_commit()` now
   builds its retained callback table through
   `make_legacy_canvas_stroke_commit_callbacks(...)`; the legacy executor still

docs/modernization/tasks.md

@@ -1808,7 +1808,7 @@ cmake --build --preset windows-msvc-default --config Debug --target PanoPainter
 
 ### STR-039 - Wire Stroke Commit Service Boundary
 
-Status: Ready
+Status: Done
 Score: +1 renderer boundary and OpenGL parity
 Debt: `DEBT-0036`
 Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_commit_services.h`, `tests/paint_renderer/stroke_execution_tests.cpp`
@@ -1819,6 +1819,8 @@ Move the remaining `Canvas::stroke_commit()` service wiring behind the retained
 stroke-commit helper boundary so the callsite keeps only local history and
 layer mutation logic.
 
+Closeout: `7cafaaa1`
+
 Done Checks:
 
 - `Canvas::stroke_commit()` no longer owns the retained commit-service wiring