feat: migrate CartSnackbar to global notification store

client/src/features/cart/add-to-cart/ui/AddToCartButton.tsx

@@ -4,7 +4,7 @@ import { useMutation, useQueryClient } from '@tanstack/react-query'
 import { useUnit } from 'effector-react'
 import { addToCart } from '@/entities/cart/api/cart-api'
 import { $user } from '@/shared/model/auth'
-import { cartAdded } from '@/shared/model/cart-notifications'
+import { addNotification } from '@/shared/model/notification'
 
 type Props = {
   productId: string
@@ -21,7 +21,7 @@ export function AddToCartButton(props: Props) {
     mutationFn: () => addToCart({ productId, qty }),
     onSuccess: () => {
       void qc.invalidateQueries({ queryKey: ['me', 'cart'] })
-      cartAdded()
+      addNotification({ type: 'info', message: 'Товар добавлен в корзину' })
     },
   })