Extract preview main pass texture dispatch

docs/modernization/debt.md

@@ -18,6 +18,10 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Recent Reductions
 
+- 2026-06-13: DEBT-0036 was narrowed again. `NodeStrokePreview::draw_stroke_immediate()`
+  now routes main-pass texture binding through
+  `bind_legacy_node_stroke_preview_main_pass_textures(...)`; the retained path
+  still owns the concrete texture objects and mixer binding callbacks.
 - 2026-06-13: DEBT-0036 was narrowed again. `NodeStrokePreview::draw_stroke_immediate()`
   no longer duplicates main-pass setup in the outer `prepare_main_pass` block;
   the retained main-live-pass helper now owns blend-uniform and texture binding