Extend app input planning to UI state

docs/modernization/roadmap.md

@@ -206,10 +206,12 @@ VR UI drawing, main UI drawing, and redraw reset now live in `pp_app_core`;
 render-target recreation, and OpenGL/UI drawing stay in the legacy app.
 App input dispatch decisions for pointer coordinate normalization, mouse
 designer-first routing, gesture midpoint/delta math, touch/key main-layout
-routing, and VR spacebar camera-sync intent now live in `pp_app_core`;
-`App::mouse_*`, `App::gesture_*`, `App::touch_tap`, `App::key_*`, and
-`pano_cli plan-app-input` consume those plans while retained event objects and
-legacy `Node` dispatch stay in the app shell.
+routing, VR spacebar camera-sync intent, UI visibility toggling, and stylus
+touch-lock attachment now live in `pp_app_core`; `App::mouse_*`,
+`App::gesture_*`, `App::touch_tap`, `App::key_*`, `App::toggle_ui`,
+`App::set_stylus`, and `pano_cli plan-app-input` consume those plans while
+retained event objects, child-node mutation, and legacy `Node` dispatch stay
+in the app shell.
 Shutdown lifecycle staging for UI-state save, stroke-preview renderer shutdown,
 recording stop, texture/shader invalidation, layout unload, render-target
 destruction, panel-node release, and quick-mode cleanup now lives in
@@ -1678,8 +1680,11 @@ Results:
 - Focused app-input CTest coverage passed for `pp_app_core_app_input_tests`,
   `pano_cli_plan_app_input_pointer_smoke`,
   `pano_cli_plan_app_input_gesture_smoke`,
-  `pano_cli_plan_app_input_key_vr_smoke`, and
-  `pano_cli_plan_app_input_rejects_bad_float`.
+  `pano_cli_plan_app_input_key_vr_smoke`,
+  `pano_cli_plan_app_input_ui_toggle_smoke`,
+  `pano_cli_plan_app_input_stylus_smoke`,
+  `pano_cli_plan_app_input_rejects_bad_float`, and
+  `pano_cli_plan_app_input_rejects_missing_ui_panel`.
 - `PanoPainter`, `pp_app_core_app_shutdown_tests`, and `pano_cli` built after
   shutdown cleanup staging moved into `pp_app_core`.
 - Focused shutdown CTest coverage passed for `pp_app_core_app_shutdown_tests`,