Own log worker and trim Apple platform hooks

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