Extract preview main live pass request

docs/modernization/debt.md

@@ -160,6 +160,11 @@ agent or engineer to remove them without reconstructing context from chat.
   through `execute_legacy_node_stroke_preview_main_live_pass(...)`; 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 main live-pass request assembly through
+  `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. `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

@@ -1717,7 +1717,7 @@ Completed Task Log:
 
 ### STR-036 - Extract Preview Main Live Pass Orchestration
 
-Status: Ready
+Status: Done
 Score: no score movement
 Debt: `DEBT-0036`
 Scope: `src/node_stroke_preview.cpp`, `tests/paint_renderer/compositor_tests.cpp`
@@ -1728,6 +1728,8 @@ Move the remaining `NodeStrokePreview::draw_stroke_immediate()` main live-pass
 orchestration into a retained helper so the callsite keeps only branch
 selection and direct live-pass dispatch.
 
+Closeout: `b9647847`
+
 Done Checks:
 
 - `NodeStrokePreview::draw_stroke_immediate()` no longer owns the main live-pass