Move Win32 async context ownership and trim canvas draw setup

docs/modernization/debt.md

@@ -18,6 +18,17 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Reductions
 
+- 2026-06-16: `DEBT-0003` was narrowed again. The Win32 async GL/context lock
+  state now lives in `src/platform_windows/windows_platform_services.cpp`
+  instead of `src/main.cpp` retained state, and `main.cpp` only seeds the
+  created `HDC`/`HGLRC` into that platform-owned helper during initialization
+  and context recreation; broader Win32 bootstrap/runtime ownership remains.
+- 2026-06-16: `DEBT-0036` was narrowed again. `NodeCanvas` merged-path
+  per-plane merged-texture draw callback setup now routes through
+  `make_legacy_canvas_draw_merge_layer_texture_draw(...)` in
+  `src/legacy_canvas_draw_merge_services.h` instead of keeping that callback
+  setup inline in `NodeCanvas::draw()`; broader canvas draw orchestration and
+  retained GL resource ownership remain.
 - 2026-06-16: `DEBT-0037` was narrowed again. `App::rec_loop()` in
   `src/app.cpp` now delegates recording worker iteration orchestration into
   `process_legacy_recording_worker_iteration(...)` in