Browser validation found 2 runtime issues:
1. TooltipProvider only wrapped EditorView, but <Tip> components in
AppToast rendered outside it → moved TooltipProvider to App.vue
to wrap everything including toasts.
2. SDK components call useEditor() but the app never provided the
editor via the SDK's injection system → added provideEditor(store)
in EditorView.vue so SDK primitives can access the editor.
Validated: zero console errors, canvas renders, demo shapes visible.
43694aaeb3