Extend app input planning to UI state

docs/modernization/build-inventory.md

@@ -843,7 +843,8 @@ Known local toolchain state:
 - `pp_app_core_app_input_tests` covers pointer coordinate normalization,
   invalid pointer/gesture inputs, designer-first mouse routing, mouse-cancel
   routing, gesture midpoint/distance/delta math, main-layout routing, key state
-  mutation intent, and VR spacebar camera-sync intent.
+  mutation intent, VR spacebar camera-sync intent, UI visibility toggle target
+  selection, malformed UI-toggle layout rejection, and stylus touch-lock intent.
 - `pp_app_core_app_shutdown_tests` covers legacy shutdown cleanup staging for
   UI-state save, stroke-preview renderer shutdown, recording stop,
   texture/shader invalidation, layout unload, render-target/mesh destruction,

docs/modernization/debt.md

@@ -100,11 +100,14 @@ agent or engineer to remove them without reconstructing context from chat.
   render-target recreation, and OpenGL/UI drawing remain in the legacy app.
 - 2026-06-05: DEBT-0003 was narrowed. Pointer coordinate normalization,
   mouse designer-first routing, gesture midpoint/delta math, touch/key
-  main-layout routing, and VR spacebar camera-sync intent are now tested
-  `pp_app_core` input plans consumed by `App::mouse_*`, `App::gesture_*`,
-  `App::touch_tap`, `App::key_*`, and `pano_cli plan-app-input`; retained
-  `MouseEvent`/`GestureEvent`/`TouchEvent`/`KeyEvent` construction and legacy
-  `Node` event dispatch remain in the app shell.
+  main-layout routing, VR spacebar camera-sync intent, UI visibility toggling,
+  and stylus touch-lock attachment are now tested `pp_app_core` input plans
+  consumed by `App::mouse_*`, `App::gesture_*`, `App::touch_tap`,
+  `App::key_*`, `App::toggle_ui`, `App::set_stylus`, and
+  `pano_cli plan-app-input`; retained
+  `MouseEvent`/`GestureEvent`/`TouchEvent`/`KeyEvent` construction,
+  UI child-node mutation, and legacy `Node` event dispatch remain in the app
+  shell.
 - 2026-06-05: DEBT-0003 was narrowed again. Shutdown cleanup staging for
   UI-state save, stroke-preview renderer shutdown, recording stop,
   texture/shader invalidation, layout unload, UI render-target and face-plane

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`,