Extract preview dual pass live body

docs/modernization/debt.md

@@ -165,6 +165,10 @@ agent or engineer to remove them without reconstructing context from chat.
   `make_stroke_draw_immediate_main_live_pass_request(...)`; the retained path
   still owns the concrete frame mutation, sample shader setup, and final mixer
   unbind.
+- 2026-06-13: DEBT-0036 was narrowed again. `NodeStrokePreview::draw_stroke_immediate()`
+  now routes the dual-pass live body through
+  `execute_stroke_draw_immediate_dual_pass(...)`; the retained path still owns
+  the concrete frame mutation, shader setup, and preview copy behavior.
 - 2026-06-13: DEBT-0036 was narrowed again. `Canvas::draw_merge()` now routes
   the remaining per-layer branch orchestration through
   `execute_legacy_canvas_draw_merge_layer_composite(...)`; the retained path

docs/modernization/tasks.md

@@ -1745,6 +1745,36 @@ ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_composito
 cmake --build --preset windows-msvc-default --config Debug --target PanoPainter
 ```
 
+### STR-037 - Extract Preview Dual Pass Live Body
+
+Status: Done
+Score: no score movement
+Debt: `DEBT-0036`
+Scope: `src/node_stroke_preview.cpp`, `tests/paint_renderer/compositor_tests.cpp`
+
+Goal:
+
+Move the remaining `NodeStrokePreview::draw_stroke_immediate()` dual-pass live
+body into a retained helper so the callsite keeps only sequence orchestration
+and preview copy handling.
+
+Closeout: `a2e805f9`
+
+Done Checks:
+
+- `NodeStrokePreview::draw_stroke_immediate()` no longer owns the dual-pass live
+  body inline.
+- Regression coverage proves the helper preserves the dual-pass callback order
+  and preview copy behavior.
+- `docs/modernization/debt.md` records the reduced dual-pass live surface.
+
+Validation:
+
+```powershell
+ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-onfailure
+cmake --build --preset windows-msvc-default --config Debug --target PanoPainter
+```
+
 ### STR-010 - Extract Remaining Draw Merge Composite Orchestration
 
 ### STR-016 - Extract Draw Merge Layer Composite Execution