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;

docs/modernization/roadmap.md

@@ -3141,6 +3141,11 @@ Results:
   `execute_legacy_canvas_stroke_temporary_composite(...)` for setup, sampler
   bind, texture bind, draw, and texture unbind ordering, while erase-path and
   broader final composite ownership remain in the legacy Canvas path.
+- `NodeStrokePreview::draw_stroke_immediate()` now shares
+  `execute_legacy_node_stroke_preview_pass_sequence(...)` for
+  dual-pass/background/main-pass/final-composite/copy-back ordering, while the
+  remaining local preview ownership is concentrated around `stroke_draw_mix()`
+  setup/execution.
 - `NodeStrokePreview::stroke_draw_mix()` now shares one local helper for mixer
   framebuffer bind/unbind, viewport/scissor/blend state, texture-slot
   binding, and final plane draw, while material planning and shader uniform

docs/modernization/tasks.md

@@ -509,6 +509,13 @@ Done Checks:
 
 Progress Notes:
 
+- 2026-06-13: `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.
+  Next slice should target that final mix-pass setup/execution seam without
+  reopening landed sample, binding, material-planning, or final-composite
+  helpers.
 - 2026-06-13: `Canvas::draw_merge()` non-erase live temporary-stroke
   composite ordering now routes through
   `execute_legacy_canvas_stroke_temporary_composite(...)`; erase-path and