[Update] Starting Up: Add loading animation when the software preparing, until backend is ready.

src-ui/logics/common/index.js

@@ -1,3 +1,4 @@
+export { useIsBackendReady } from "./useIsBackendReady";
 export { useWindow } from "./useWindow";
 export { useIsOpenedConfigPage } from "./useIsOpenedConfigPage";
 export { useIsSoftwareUpdateAvailable } from "./useIsSoftwareUpdateAvailable";