Own log worker and trim Apple platform hooks

docs/modernization/debt.md

@@ -18,6 +18,22 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Reductions
 
+- 2026-06-16: `DEBT-0036` was narrowed again. `NodeCanvas` cache-to-screen
+  checkerboard-plane callback setup now routes through
+  `make_legacy_canvas_draw_merge_cache_to_screen_checkerboard_plane(...)` in
+  `src/legacy_canvas_draw_merge_services.h` instead of building the full MVP
+  callback body inline in `NodeCanvas::draw()`; broader canvas draw
+  orchestration remains.
+- 2026-06-16: `DEBT-0003` was narrowed again. `LogRemote` now owns its network
+  logging worker as `std::jthread` with explicit stop requests in `src/log.*`
+  instead of raw `std::thread` ownership; retained global logger singleton,
+  network logging policy, and queue execution remain.
+- 2026-06-16: `DEBT-0017` was narrowed again. Apple crash-test, app-close, and
+  iOS SonarPen hooks now route through explicit bridge callbacks in
+  `src/platform_apple/apple_platform_services.*` consumed by
+  `src/platform_legacy/legacy_platform_services.cpp` instead of direct `App::I`
+  calls in those legacy platform methods; the retained Apple fallback adapter
+  and broader platform singleton reach remain.
 - 2026-06-16: `DEBT-0036` was narrowed again. `NodeCanvas` merged-path and
   non-blend checkerboard background setup now route through
   `execute_legacy_canvas_draw_merge_background_setup(...)` in