feat: select the export bcg image and bcg color from appState

src/scene/export.ts

@@ -73,6 +73,7 @@ export const exportToCanvas = async (
       imageCache,
       renderGrid: false,
       isExporting: true,
+      exportBackgroundImage: appState.exportBackgroundImage,
     },
   });
 

src/scene/types.ts

@@ -28,6 +28,7 @@ export type InteractiveCanvasRenderConfig = {
   remotePointerUserStates: { [id: string]: string };
   remotePointerUsernames: { [id: string]: string };
   remotePointerButton?: { [id: string]: string | undefined };
+  exportBackgroundImage?: string;
   selectionColor?: string;
   // extra options passed to the renderer
   // ---------------------------------------------------------------------------