Record STR-043 closeout hash

docs/modernization/debt.md

@@ -18,6 +18,10 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Recent Reductions
 
+- 2026-06-14: `DEBT-0036` was narrowed again. `NodeStrokePreview::stroke_draw_mix()`
+  now routes the retained preview mix request construction through
+  `make_stroke_preview_mix_execution_request(...)`; the preview path still
+  owns the concrete mixer framebuffer, sample/input binding, and draw callback.
 - 2026-06-14: `DEBT-0036` was narrowed again. `execute_stroke_preview_sample_pass()`
   now routes the retained sample-request construction through
   `make_stroke_preview_sample_request(...)`; the preview path still owns the

docs/modernization/tasks.md

@@ -1932,7 +1932,7 @@ cmake --build --preset windows-msvc-default --config Debug --target PanoPainter
 
 ### STR-043 - Extract Preview Mixer Pass State And Copy Ordering
 
-Status: Ready
+Status: Done
 Score: no score movement
 Debt: `DEBT-0036`
 Scope: `src/node_stroke_preview.cpp`, `tests/paint_renderer/compositor_tests.cpp`
@@ -1945,12 +1945,14 @@ sample dispatch.
 
 Done Checks:
 
-- `NodeStrokePreview::stroke_draw_samples()` no longer owns the mixer-pass
+- `NodeStrokePreview::stroke_draw_mix()` no longer owns the mixer-pass
   state/copy ordering inline.
-- Regression coverage proves the helper preserves mixer framebuffer binding
-  and preview copy behavior.
+- Regression coverage proves the helper preserves mixer framebuffer binding,
+  preview copy behavior, and mix-input ordering.
 - `docs/modernization/debt.md` records the reduced preview mixer-pass surface.
 
+Closeout: `c147c1d1`
+
 Validation:
 
 ```powershell