Route canvas input policy through platform services

docs/modernization/build-inventory.md

@@ -208,7 +208,8 @@ Known local toolchain state:
 - `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`
-  contracts while legacy `Canvas` mode state, transform actions, picking,
+  contracts while canvas mode tip visibility and pressure remapping now ask
+  `PlatformServices`; legacy `Canvas` mode state, transform actions, picking,
   touch-lock, save/UI/cursor calls, brush-size controls, and history execution
   remain tracked by `DEBT-0027`.
 - `src/legacy_document_animation_services.*` is the current UI-shell bridge for
@@ -555,8 +556,9 @@ Known local toolchain state:
   hooks, render debug callback hooks, per-frame platform hooks, picker
   callbacks, recording cleanup, exported-image publishing, persistent storage
   flushing, document browse roots, working-directory picker policy and
-  display-path formatting, native UI/window state saving, live asset/layout
-  reload policy, diagnostic stacktrace/crash hooks,
+  display-path formatting, canvas input tip visibility and pressure remapping,
+  native UI/window state saving, live asset/layout reload policy, diagnostic
+  stacktrace/crash hooks,
   SonarPen availability/startup, PPBR export data-directory policy,
   prepared-file writable target selection, network TLS verification policy, and
   prepared-file save/download handoff; PPBR