Own Windows app lifetime in runtime shell

docs/modernization/roadmap.md

@@ -70,6 +70,15 @@ What is already real:
 - `pp_app_core`
 
 Latest slice:
+- `src/platform_windows/windows_runtime_shell.cpp` now explicitly owns the
+  Windows `App` lifetime through a retained `std::unique_ptr<App>` instead of
+  raw `new`/`delete` plus shutdown-side manual cleanup in the lifecycle shell.
+- `src/platform_windows/windows_lifecycle_shell.cpp` now releases the bound
+  Windows app through `release_bound_app()` after runtime shutdown instead of
+  deleting it directly through the global shutdown path.
+- `src/platform_windows/windows_window_shell.cpp` now routes the touched
+  key-map and VR-state reads through narrow helpers instead of keeping the
+  broader retained-state bundle live across the main window-proc body.
 - `scripts/automation/quiet-validate.ps1` is now the bundled checkpoint path
   for Windows build/test plus optional platform and Apple remote validation,
   with one compact JSON summary under `out/logs/quiet-validation`.