Retain Apple bridge services and bind Win32 runtime

docs/modernization/tasks.md

@@ -1154,6 +1154,11 @@ Current slice:
   also live in `src/platform_legacy/legacy_platform_state.*`, and
   `src/platform_legacy/legacy_platform_services.cpp` now consumes those
   snapshots without direct `App::I` reads in the touched paths
+- the retained Apple document bridge now also lives behind
+  `active_legacy_apple_document_platform_services()` in
+  `src/platform_legacy/legacy_platform_state.*` instead of being built inline
+  inside `src/platform_legacy/legacy_platform_services.cpp`, and that retained
+  service resets when seeded Apple handles change
 - retained Apple callback injection and broader `platform_legacy` singleton
   reach are still open
 - the `platform_legacy`-mirrored Apple/GLFW handle cluster is now seeded
@@ -1210,6 +1215,11 @@ Current slice:
 - `App` also no longer owns `and_app` or `and_engine`; the retained Android
   entrypoint now seeds only the explicit legacy platform storage snapshot
   needed by touched platform services.
+- Win32 main-thread task dispatch also no longer reaches `AppRuntime` through
+  `App::I`; `src/platform_windows/windows_runtime_shell.*` now binds the
+  active runtime explicitly and
+  `src/platform_windows/windows_platform_services.cpp` consumes that bound
+  runtime for enqueue/drain.
 - `App` still owns broader retained legacy platform state, so this remains a
   live ownership task.