diff --git a/src/app/app-reducer.test.ts b/src/app/app-reducer.test.ts
index 046cb75..5fe4169 100644
--- a/src/app/app-reducer.test.ts
+++ b/src/app/app-reducer.test.ts
@@ -1,11 +1,11 @@
 import {
   appSlice,
-  InitialState,
+  AppInitialState,
   setAppError,
   setAppStatus,
 } from './app-reducer'
 
-let startState: InitialState
+let startState: AppInitialState
 
 const appReducer = appSlice.reducer
 
diff --git a/src/app/app-reducer.ts b/src/app/app-reducer.ts
index 1aefe7f..9b98488 100644
--- a/src/app/app-reducer.ts
+++ b/src/app/app-reducer.ts
@@ -5,16 +5,22 @@ import { AppThunk } from 'app/store'
 
 export type RequestStatus = 'idle' | 'loading' | 'succeeded' | 'failed'
 
-export type InitialState = {
-  // происходит ли сейчас взаимодействие с сервером
+export type AppInitialState = {
+  /**
+   * происходит ли сейчас взаимодействие с сервером
+   */
   status: RequestStatus
-  // если ошибка какая-то глобальная произойдёт - мы запишем текст ошибки сюда
+  /**
+   * если ошибка какая-то глобальная произойдёт - мы запишем текст ошибки сюда
+   */
   error: string | null
-  // true когда приложение проинициализировалось (проверили юзера, настройки получили и т.д.)
+  /**
+   * true когда приложение проинициализировалось (проверили юзера, настройки получили и т.д.)
+   */
   isInitialized: boolean
 }
 
-const initialState: InitialState = {
+const initialState: AppInitialState = {
   status: 'idle',
   error: null,
   isInitialized: false,
@@ -23,17 +29,23 @@ const initialState: InitialState = {
 export const appSlice = createSlice({
   name: 'app',
   initialState,
-  reducers: {
-    setAppError(state, action: PayloadAction<string | null>) {
+  reducers: (builder) => ({
+    // setAppError(state, action: PayloadAction<AppInitialState['error']>) {
+    //   state.error = action.payload
+    // },
+    setAppError: builder.reducer<AppInitialState['error']>((state, action) => {
       state.error = action.payload
-    },
+    }),
     setAppStatus(state, action: PayloadAction<RequestStatus>) {
       state.status = action.payload
     },
-    setAppInitialized(state, action: PayloadAction<boolean>) {
+    setAppInitialized(
+      state,
+      action: PayloadAction<AppInitialState['isInitialized']>
+    ) {
       state.isInitialized = action.payload
     },
-  },
+  }),
   selectors: {
     selectAppError: (state) => state.error,
     selectAppStatus: (state) => state.status,
diff --git a/src/app/store.ts b/src/app/store.ts
index 4efa8a6..37fdb02 100644
--- a/src/app/store.ts
+++ b/src/app/store.ts
@@ -1,21 +1,22 @@
 import { tasksSlice } from 'features/TodolistsList/tasks-reducer'
 import { todolistsSlice } from 'features/TodolistsList/todolists-reducer'
-import { combineReducers } from 'redux'
 import { ThunkAction, ThunkDispatch } from 'redux-thunk'
 import { appSlice } from './app-reducer'
 import { authSlice } from 'features/Login/auth-reducer'
-import { configureStore, UnknownAction } from '@reduxjs/toolkit'
+import { combineSlices, configureStore, UnknownAction } from '@reduxjs/toolkit'
 
-const rootReducer = combineReducers({
-  [appSlice.reducerPath]: appSlice.reducer,
-  [tasksSlice.reducerPath]: tasksSlice.reducer,
-  [todolistsSlice.reducerPath]: todolistsSlice.reducer,
-  [authSlice.reducerPath]: authSlice.reducer,
-})
+const rootReducer = combineSlices(
+  appSlice,
+  authSlice,
+  todolistsSlice,
+  tasksSlice
+)
 
 // ❗старая запись, с новыми версиями не работает
 //  const store = createStore(rootReducer, applyMiddleware(thunkMiddleware));
-export const store = configureStore({ reducer: rootReducer })
+export const store = configureStore({
+  reducer: rootReducer,
+})
 
 export type AppRootState = ReturnType<typeof rootReducer>
 
diff --git a/src/components/AddItemForm/AddItemForm.tsx b/src/components/AddItemForm/AddItemForm.tsx
index 695b822..f44caec 100644
--- a/src/components/AddItemForm/AddItemForm.tsx
+++ b/src/components/AddItemForm/AddItemForm.tsx
@@ -31,7 +31,7 @@ export const AddItemForm = React.memo(function ({
     if (error !== null) {
       setError(null)
     }
-    if (e.charCode === 13) {
+    if (e.key === 'Enter') {
       addItemHandler()
     }
   }
@@ -44,7 +44,7 @@ export const AddItemForm = React.memo(function ({
         error={!!error}
         value={title}
         onChange={onChangeHandler}
-        onKeyPress={onKeyPressHandler}
+        onKeyDown={onKeyPressHandler}
         label='Title'
         helperText={error}
       />
diff --git a/src/features/TodolistsList/tasks-reducer.ts b/src/features/TodolistsList/tasks-reducer.ts
index 6777cf3..5348c75 100644
--- a/src/features/TodolistsList/tasks-reducer.ts
+++ b/src/features/TodolistsList/tasks-reducer.ts
@@ -27,9 +27,7 @@ export type UpdateDomainTaskModel = {
   deadline?: string
 }
 
-export type TasksState = {
-  [key: string]: Array<TaskEntity>
-}
+export type TasksState = Record<string, Array<TaskEntity>>
 
 const initialState: TasksState = {}