some changes

assets/src/app/store.ts

@@ -1,11 +1,13 @@
 import { configureStore } from "@reduxjs/toolkit";
 
 import AuthReducer from "../features/auth/auth-slice";
+import ThemeSlice from "../features/theme/theme-slice";
 import {cardDeckApiSlice} from "../features/cardDecks/cardDeck-api-slice";
 
 export const store = configureStore({
   reducer: {
     auth: AuthReducer,
+    theme: ThemeSlice,
     [cardDeckApiSlice.reducerPath]: cardDeckApiSlice.reducer
   },
   middleware: (getDefaultMiddleware) => {