feat: add favorites - update dependencies

client/app/services/storage.service.ts

@@ -1,3 +1,5 @@
+import { SoundType } from '../model';
+
 const clear = () => {
   localStorage.clear();
 };
@@ -10,8 +12,19 @@ const getJWT = (): string | null => {
   return localStorage.getItem('jwt');
 };
 
+const getFavorites = (): SoundType[] => {
+  const f = localStorage.getItem('favorites');
+  return f ? JSON.parse(f) : [];
+};
+
+const setFavorites = (f: SoundType[]): void => {
+  localStorage.setItem('favorites', JSON.stringify(f));
+};
+
 export const StorageService = {
   clear,
   getJWT,
   setJWT,
+  getFavorites,
+  setFavorites,
 };