Record STR-057 closeout hash

docs/modernization/tasks.md

@@ -2325,6 +2325,28 @@ Done Checks:
 - `docs/modernization/debt.md` records the reduced stroke-commit planning
   surface.
 
+### STR-057 - Extract Stroke Commit Request Dispatch Invocation
+
+Status: Done
+Score: no score movement
+Debt: `DEBT-0036`
+Scope: `src/canvas.cpp`, `tests/paint_renderer/stroke_execution_tests.cpp`
+Closeout: `05386598`
+
+Goal:
+
+Move the remaining `Canvas::stroke_commit()` request-dispatch invocation into
+a helper so the callsite keeps only state capture and helper dispatch.
+
+Done Checks:
+
+- `Canvas::stroke_commit()` no longer spells the request-dispatch invocation
+  inline.
+- Regression coverage proves the helper preserves the retained dispatch
+  arguments.
+- `docs/modernization/debt.md` records the reduced stroke-commit dispatch
+  surface.
+
 Validation:
 
 ```powershell