artcraft: bulk-rewrite shim imports to package imports + alias KeymapKeyGroup

Lifts the remaining apps/PageScene shim-paths inside the host's own
files to direct package imports. The shim files themselves stay
(actions/, hooks/, contexts/, DragAndDrop/, sceneMetadata.ts,
comps/{DragComponent,PrecisionSelector,FocalLengthDisplay,
AspectRatioMenu,PoseModeSelector,EngineCanvases,Outliner,
ControlPanelSceneObject,SceneContainer,PreviewEngineCamera,
PreviewImages,OnboardingHelper,EditorLoadingBar,
ControlsTopButtons/Help/Help}); they're still load-bearing for the
host-coupled comps that haven't migrated yet (AssetMenu/,
ControlsTopButtons/, Controls3D/) and they'll get cleaned up when
those move.

Updated host files to import directly from @storyteller/ui-pagescene:
- PageEditor.tsx (8 imports collapsed: hooks/*, EngineContext,
  actions, GridVisibleChangedEvent + pickDropPosition)
- PageScene.tsx (EngineProvider)
- comps/Controls3D/Controls3D.tsx (EngineContext, setTransformMode)
- comps/ControlsTopButtons/ControlsTopButtons.tsx (sceneMetadata)
- comps/AssetMenu/shared/ItemElement.tsx (DndAsset → dragAndDrop
  named import, EngineContext)

Lib public API:
- KeyGroup (the binding-category string-union type from keymap)
  re-exported as `KeymapKeyGroup` to avoid name collision with the
  Help component kit's KeyGroup (the keyboard-icon visual primitive).

Verified: artcraft typecheck at 61 errors (down from 62 — one fewer
pre-existing unused-import warning).

frontend/apps/artcraft/app/src/pages/PageScene/PageEditor.tsx

@@ -10,14 +10,14 @@ import { PoseModeSelector } from "./comps/PoseModeSelector";
 import { TabbedPages } from "./TabbedPages";
 
 import { DomLevels } from "~/pages/PageScene/PageSceneStore";
-import { setCameraAspect } from "~/pages/PageScene/actions";
+import { setCameraAspect } from "@storyteller/ui-pagescene";
 import { GridVisibleChangedEvent, pickDropPosition } from "@storyteller/ui-pagescene";
 import { EditorCanvas } from "./comps/EngineCanvases";
 import { SceneContainer } from "./comps/SceneContainer";
-import { useEditorCanvas } from "./hooks/useEditorCanvas";
-import { useFreeCam } from "./hooks/useFreeCam";
-import { useViewportPointer } from "./hooks/useViewportPointer";
-import { useViewportKeyboard } from "./hooks/useViewportKeyboard";
+import { useEditorCanvas } from "@storyteller/ui-pagescene";
+import { useFreeCam } from "@storyteller/ui-pagescene";
+import { useViewportPointer } from "@storyteller/ui-pagescene";
+import { useViewportKeyboard } from "@storyteller/ui-pagescene";
 import { Outliner } from "./comps/Outliner";
 import { CameraAspectRatio } from "./enums";
 import { PromptBox3D, commonToCameraAspect } from "@storyteller/ui-promptbox";
@@ -27,10 +27,10 @@ import { OnboardingHelper } from "./comps/OnboardingHelper";
 import { FocalLengthDisplay } from "./comps/FocalLengthDisplay/FocalLengthDisplay";
 
 import { uploadImage } from "~/components/reusable/UploadModalMedia/uploadImage";
-import { EngineContext } from "./contexts/EngineContext";
+import { EngineContext } from "@storyteller/ui-pagescene";
 
 import { uploadPlaneFromMediaToken } from "~/components/reusable/UploadModalMedia/uploadPlane";
-import { addObject, addCharacter } from "./actions";
+import { addObject, addCharacter } from "@storyteller/ui-pagescene";
 import { usePageSceneStore } from "./PageSceneStore";
 import { AssetType, AUTH_STATUS } from "~/enums";
 import { v4 as uuidv4 } from "uuid";

frontend/apps/artcraft/app/src/pages/PageScene/PageScene.tsx

@@ -1,5 +1,5 @@
 import { DragComponent } from "~/pages/PageScene/comps/DragComponent/DragComponent";
-import { EngineProvider } from "./contexts/EngineContext";
+import { EngineProvider } from "@storyteller/ui-pagescene";
 import { useTabStore } from "~/pages/Stores/TabState";
 import { useActiveJobs } from "~/hooks/useActiveJobs";
 import { useBackgroundLoadingMedia } from "~/hooks/useBackgroundLoadingMedia";

frontend/apps/artcraft/app/src/pages/PageScene/comps/AssetMenu/shared/ItemElement.tsx

@@ -1,8 +1,10 @@
 // TODO: Move into shared component.
 import { useContext } from "react";
 import { MediaItem } from "~/pages/PageScene/models";
-import DndAsset from "~/pages/PageScene/DragAndDrop/DndAsset";
-import { EngineContext } from "~/pages/PageScene/contexts/EngineContext";
+import {
+  dragAndDrop as DndAsset,
+  EngineContext,
+} from "@storyteller/ui-pagescene";
 import { Badge } from "@storyteller/ui-badge";
 import { AssetType } from "~/enums";
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";

frontend/apps/artcraft/app/src/pages/PageScene/comps/Controls3D/Controls3D.tsx

@@ -12,7 +12,7 @@ import { ButtonIconSelect } from "@storyteller/ui-button-icon-select";
 import { Button } from "@storyteller/ui-button";
 import { Tooltip } from "@storyteller/ui-tooltip";
 import { SettingsModal } from "@storyteller/ui-settings-modal";
-import { EngineContext } from "../../contexts/EngineContext";
+import { EngineContext } from "@storyteller/ui-pagescene";
 import { useContext, useEffect, useState } from "react";
 import { useShallow } from "zustand/shallow";
 import { usePageSceneStore } from "../../PageSceneStore";
@@ -23,7 +23,7 @@ import { useTabStore } from "~/pages/Stores/TabState";
 // eslint-disable-next-line import/no-unresolved
 // import { AssetType } from "~/enums";
 import { AssetModal } from "../AssetMenu/AssetModal";
-import { setTransformMode } from "../../actions";
+import { setTransformMode } from "@storyteller/ui-pagescene";
 import { TransformMode } from "../../PageSceneStore";
 import { useSignals } from "@preact/signals-react/runtime";
 // eslint-disable-next-line import/no-unresolved

frontend/apps/artcraft/app/src/pages/PageScene/comps/ControlsTopButtons/ControlsTopButtons.tsx

@@ -20,7 +20,7 @@ import { CameraAspectRatio } from "~/pages/PageScene/enums";
 import { twMerge } from "tailwind-merge";
 import { Help } from "./Help";
 import { Modal } from "@storyteller/ui-modal";
-import { getSceneGenerationMetaData } from "../../sceneMetadata";
+import { getSceneGenerationMetaData } from "@storyteller/ui-pagescene";
 
 export const ControlsTopButtons = () => {
   useSignals();

frontend/apps/artcraft/tsconfig.tsbuildinfo

@@ -1 +1 @@
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Line truncated
+{"fileNames":["../../node_modules/typescript/lib/lib.es5.d.ts","../../node_modules/typescript/lib/lib.es2015.d.ts","../../node_modules/typescript/lib/lib.es2016.d.ts","../../node_modules/typescript/lib/lib.es2017.d.ts","../../node_modules/typescript/lib/lib.es2018.d.ts","../../node_modules/typescript/lib/lib.es2019.d.ts","../../node_modules/typescript/lib/lib.es2020.d.ts","../../node_modules/typescript/lib/lib.es2021.d.ts","../../node_modules/typescript/lib/lib.es2022.d.ts","../../node_modules/typescript/lib/lib.es2023.d.ts","../../node_modules/typescript/lib/lib.es2024.d.ts","../../node_modules/typescript/lib/lib.esnext.d.ts","../../node_modules/typescript/lib/lib.dom.d.ts","../../node_modules/typescript/lib/lib.dom.iterable.d.ts","../../node_modules/typescript/lib/lib.es2015.core.d.ts","../../node_modules/typescript/lib/lib.es2015.collection.d.ts","../../node_modules/typescript/lib/lib.es2015.generator.d.ts","../../node_modules/typescript/lib/lib.es2015.iterable.d.ts","../../node_modules/typescript/lib/lib.es2015.promise.d.ts","../../node_modules/typescript/lib/lib.es2015.proxy.d.ts","../../node_modules/typescript/lib/lib.es2015.reflect.d.ts","../../node_modules/typescript/lib/lib.es2015.symbol.d.ts","../../node_modules/typescript/lib/lib.es2015.symbol.wellknown.d.ts","../../node_modules/typescript/lib/lib.es2016.array.include.d.ts","../../node_modules/typescript/lib/lib.es2016.intl.d.ts","../../node_modules/typescript/lib/lib.es2017.arraybuffer.d.ts","../../node_modules/typescript/lib/lib.es2017.date.d.ts","../../node_modules/typescript/lib/lib.es2017.object.d.ts","../../node_modules/typescript/lib/lib.es2017.sharedmemory.d.ts","../../node_modules/typescript/lib/lib.es2017.string.d.ts","../../node_modules/typescript/lib/lib.es2017.intl.d.ts","../../node_modules/typescript/lib/lib.es2017.typedarrays.d.ts","../../node_modules/typescript/lib/lib.es2018.asyncgenerator.d.ts","../../node_modules/typescript/lib/lib.es2018.asynciterable.d.ts","../../node_modules/typescript/lib/lib.es2018.intl.d.ts","../../node_modules/typescript/lib/lib.es2018.promise.d.ts","../../node_modules/typescript/lib/lib.es2018.regexp.d.ts","../../node_modules/typescript/lib/lib.es2019.array.d.ts","../../node_modules/typescript/lib/lib.es2019.object.d.ts","../../node_modules/typescript/lib/lib.es2019.string.d.ts","../../node_modules/typescript/lib/lib.es2019.symbol.d.ts","../../node_modules/typescript/lib/lib.es2019.intl.d.ts","../../node_modules/typescript/lib/lib.es2020.bigint.d.ts","../../node_modules/typescript/lib/lib.es2020.date.d.ts","../../node_modules/typescript/lib/lib.es2020.promise.d.ts","../../node_modules/typescript/lib/lib.es2020.sharedmemory.d.ts","../../node_modules/typescript/lib/lib.es2020.string.d.ts","../../node_modules/typescript/lib/lib.es2020.symbol.wellknown.d.ts","../../node_modules/typescript/lib/lib.es2020.intl.d.ts","../../node_modules/typescript/lib/lib.es2020.number.d.ts","../../node_modules/typescript/lib/lib.es2021.promise.d.ts","../../node_modules/typescript/lib/lib.es2021.string.d.ts","../../node_modules/typescript/lib/lib.es2021.weakref.d.ts","../../node_modules/typescript/lib/lib.es2021.intl.d.ts","../../node_modules/typescript/lib/lib.es2022.array.d.ts","../../node_modules/typescript/lib/lib.es2022.error.d.ts","../../node_modules/typescript/lib/lib.es2022.intl.d.ts","../../node_modules/typescript/lib/lib.es2022.object.d.ts","../../node_modules/typescript/lib/lib.es2022.string.d.ts","../../node_modules/typescript/lib/lib.es2022.regexp.d.ts","../../node_modules/typescript/lib/lib.es2023.array.d.ts","../../node_modules/typescript/lib/lib.es2023.collection.d.ts","../../node_modules/typescript/lib/lib.es2023.intl.d.ts","../../node_modules/typescript/lib/lib.es2024.arraybuffer.d.ts","../../node_modules/typescript/lib/lib.es2024.collection.d.ts","../../node_modules/typescript/lib/lib.es2024.object.d.ts","../../node_modules/typescript/lib/lib.es2024.promise.d.ts","../../node_modules/typescript/lib/lib.es2024.regexp.d.ts","../../node_modules/typescript/lib/lib.es2024.sharedmemory.d.ts","../../node_modules/typescript/lib/lib.es2024.string.d.ts","../../node_modules/typescript/lib/lib.esnext.array.d.ts","../../node_modules/typescript/lib/lib.esnext.collection.d.ts","../../node_modules/typescript/lib/lib.esnext.intl.d.ts","../../node_modules/typescript/lib/lib.esnext.disposable.d.ts","../../node_modules/typescript/lib/lib.esnext.promise.d.ts","../../node_modules/typescript/lib/lib.esnext.decorators.d.ts","../../node_modules/typescript/lib/lib.esnext.iterator.d.ts","../../node_modules/typescript/lib/lib.esnext.float16.d.ts","../../node_modules/typescript/lib/lib.decorators.d.ts","../../node_modules/typescript/lib/lib.decorators.legacy.d.ts","../../node_modules/@remix-run/node/dist/globals.d.ts","../../node_modules/@types/cookie/index.d.ts","../../node_modules/@remix-run/server-runtime/dist/crypto.d.ts","../../node_modules/@remix-run/server-runtime/dist/cookies.d.ts","../../node_modules/@remix-run/server-runtime/d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truncated

frontend/libs/components/pagescene/src/index.ts

@@ -97,7 +97,10 @@ export { SceneManager } from "./lib/engine/scene_manager_api";
 export { MouseControls } from "./lib/engine/keybinds_controls";
 export type { MouseControlsDeps } from "./lib/engine/keybinds_controls";
 export { buildKeymap, dispatchBinding } from "./lib/engine/keymap";
-export type { KeyBinding, KeyGroup } from "./lib/engine/keymap";
+export type {
+  KeyBinding,
+  KeyGroup as KeymapKeyGroup,
+} from "./lib/engine/keymap";
 
 // Engine subsystems
 export { HistoryManager } from "./lib/engine/editor/HistoryManager";