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

docs/modernization/roadmap.md

@@ -100,7 +100,7 @@ Current architecture mismatches that must be treated as real blockers:
   remain, even though iOS keyboard visibility and prepared-file save handoff
   now also route through explicit Apple bridge callbacks and Apple render-
   context hooks plus iOS main-render-target binding now route through the same
-  bridge style.
+  bridge style, as do Apple crash-test, app-close, and iOS SonarPen hooks.
 - `src/platform_legacy/legacy_platform_services.*` is still part of the live
   app shell.
 - `pp_panopainter_ui` still depends on `pp_legacy_app`.
@@ -108,7 +108,8 @@ Current architecture mismatches that must be treated as real blockers:
   OpenGL execution around the renderer boundary, even though `NodeCanvas`
   display resolve, cache-to-screen composite, post-draw mask/grid/current-mode
   sequencing, per-layer/per-plane retained draw execution, and shared
-  checkerboard background setup now route through retained draw-merge helpers.
+  checkerboard background setup now route through retained draw-merge helpers,
+  with the cache-to-screen checkerboard-plane callback setup also reduced.
 - `app_layout.cpp` and `app_dialogs.cpp` are still mixed shell/controller files
   rather than thin composition/binding surfaces.
 - `App`, `Canvas`, `Node`, retained workers, and platform entrypoints still use
@@ -118,7 +119,8 @@ Current architecture mismatches that must be treated as real blockers:
   launches now use owned `std::jthread` or service-owned worker queues and
   `AppRuntime` now owns render/UI workers with explicit `std::jthread`
   shutdown semantics while the Windows splash-dialog and HMD renderer workers
-  also use owned `std::jthread` lifecycle.
+  also use owned `std::jthread` lifecycle and `LogRemote` now uses the same
+  ownership model.
 - Modern C++23 usage exists in extracted components, especially `std::span`,
   explicit result/status objects, and a few concepts, but the live app still
   does not consistently express ownership, thread affinity, or renderer

docs/modernization/tasks.md

@@ -133,6 +133,8 @@ Current slice:
   node still owns most live-pass and retained GL resource execution.
 - `NodeCanvas` merged-path and non-blend checkerboard background setup now also
   route through `execute_legacy_canvas_draw_merge_background_setup(...)`.
+- `NodeCanvas` cache-to-screen checkerboard-plane callback setup now also routes
+  through a retained helper in `legacy_canvas_draw_merge_services.h`.
 - `NodeCanvas` display resolve plus cache-to-screen checkerboard/cache-texture
   composite now route through `legacy_canvas_draw_merge_services.h`.
 - `NodeCanvas` smoothing-mask overlay, smoothing-mask face pass, grid keepalive
@@ -375,6 +377,8 @@ Current slice:
 - Windows splash-dialog and HMD renderer worker ownership in `main.cpp` now
   also use `std::jthread` with explicit stop requests instead of raw
   `std::thread`
+- `LogRemote` worker ownership in `src/log.*` now also uses `std::jthread`
+  with explicit stop requests instead of raw `std::thread`
 - brush package import/export now use service-owned `std::jthread` workers and
   UI-thread completion handoff
 - prepared-file save work and grid lightmap launch now also use service-owned
@@ -593,6 +597,9 @@ Current slice:
 - Apple render-context acquire/release/present hooks and iOS
   `bind_main_render_target()` now also route through explicit Apple bridge
   callbacks instead of direct `App::I` calls in `LegacyPlatformServices`
+- Apple crash-test, app-close, and iOS SonarPen hooks now also route through
+  explicit Apple bridge callbacks instead of direct `App::I` calls in
+  `LegacyPlatformServices`
 - retained Apple callback injection and broader `platform_legacy` singleton
   reach are still open