Own Windows app lifetime in runtime shell

docs/modernization/tasks.md

@@ -78,6 +78,15 @@ Completed, blocked, and superseded task history moved to
   the queue is now ordered by code movement instead.
 
 Current slice:
+- `src/platform_windows/windows_runtime_shell.cpp` now owns the Windows `App`
+  through a retained `std::unique_ptr<App>`, so startup/early-return/convert
+  paths no longer manage raw `new`/`delete` app lifetime manually.
+- `src/platform_windows/windows_lifecycle_shell.cpp` now releases the bound
+  app through `release_bound_app()` after runtime shutdown instead of deleting
+  it directly through the lifecycle shell.
+- `src/platform_windows/windows_window_shell.cpp` now routes the touched
+  key-map synchronization and VR close state through narrow helpers instead of
+  carrying the broader retained window bundle live across the window-proc path.
 - `scripts/automation/quiet-validate.ps1` now owns the recommended quiet
   checkpoint path and can bundle Windows build/test, Android/platform sweeps,
   and Apple remote compile gates into one compact JSON summary with