Centralize legacy app startup

docs/modernization/build-inventory.md

@@ -173,6 +173,12 @@ Known local toolchain state:
   the `pp_app_core` `AppPreferenceServices` contract while retained settings
   persistence, VR start/stop, recording lifecycle, and legacy canvas/UI
   execution remain tracked by `DEBT-0045`.
+- `src/legacy_app_startup_services.*` is the current app-shell bridge for
+  startup preference/runtime execution. It keeps run-counter persistence,
+  startup preference save, auto-timelapse startup, stored VR-controller state,
+  and license-warning decisions on the `pp_app_core` `AppStartupServices`
+  contract while retained `Settings`, `App::rec_start`, and message-box
+  execution remain tracked by `DEBT-0046`.
 - `src/legacy_canvas_tool_services.*` is the current app-shell bridge for
   canvas toolbar tool selection, NodeCanvas stylus/input mode switching, and
   canvas hotkey/touch execution. It keeps those live paths on the `pp_app_core`
@@ -587,6 +593,10 @@ Known local toolchain state:
   timelapse start/stop/no-op decisions, VR mode success/failure dispatch,
   simple stored preferences, and `AppPreferenceServices` execution dispatch for
   options-menu side effects.
+- `pp_app_core_app_startup_tests` covers startup run-counter increment
+  planning, optional auto-timelapse/license/VR-controller decisions, negative
+  and overflow run-counter rejection, stable full startup dispatch ordering,
+  split persistence/runtime dispatch, and malformed startup-plan rejection.
 - `pp_platform_api_tests` covers service dispatch for clipboard read/write,
   empty clipboard writes, cursor visibility, virtual-keyboard visibility,
   external file display, file sharing, and picker callbacks without platform