Trim preview main pass setup glue

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()`
+  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
+  setup, while the sequence wrapper keeps only structural pass ordering.
 - 2026-06-13: DEBT-0036 was narrowed again. `NodeStrokePreview::draw_stroke_immediate()`
   now routes the main live-pass setup, frame execution, and preview copy-back
   through `execute_legacy_node_stroke_preview_main_live_pass(...)`; the

src/node_stroke_preview.cpp

@@ -763,21 +763,7 @@ void NodeStrokePreview::draw_stroke_immediate()
                         m_plane.draw_fill();
                     });
             },
-            .prepare_main_pass = [&] {
-                pp::panopainter::use_legacy_stroke_shader();
-                pp::panopainter::apply_legacy_stroke_blend_uniforms(
-                    material.stroke_pass.uses_pattern,
-                    b->m_tip_mix,
-                    b->m_tip_wet,
-                    b->m_tip_noise);
-
-                bind_stroke_preview_main_pass_textures(
-                    *b,
-                    m_tex,
-                    m_rtt_mixer,
-                    copy_stroke_destination,
-                    pass_orchestration.composite.uses_mixer);
-            },
+            .prepare_main_pass = [&] {},
             .execute_main_pass = [&] {
                 [[maybe_unused]] const bool main_live_ok =
                     pp::panopainter::execute_legacy_node_stroke_preview_main_live_pass(