Share retained preview pass sequence helper

docs/modernization/debt.md

@@ -43,6 +43,11 @@ agent or engineer to remove them without reconstructing context from chat.
   bind, draw, and texture unbind ordering through
   `execute_legacy_canvas_stroke_temporary_composite(...)`; erase-path and
   broader final composite ownership remain retained in `Canvas`.
+- 2026-06-13: DEBT-0036 was narrowed again. `NodeStrokePreview::draw_stroke_immediate()`
+  now routes dual-pass/background/main-pass/final-composite/copy-back ordering
+  through `execute_legacy_node_stroke_preview_pass_sequence(...)`; the
+  remaining local preview ownership is concentrated around `stroke_draw_mix()`
+  setup/execution.
 - 2026-06-13: DEBT-0036 was narrowed again. `NodeStrokePreview::stroke_draw_mix()`
   now routes mixer framebuffer bind/unbind, viewport/scissor/blend state,
   texture-slot binding, and final plane draw through one local helper;