fix favicon, playlist subscription only

src/utils/playlistCreationAccess.js

@@ -0,0 +1,10 @@
+export const PLAYLIST_CREATION_SUBSCRIPTION_MESSAGE =
+  'La création de playlist est réservée aux abonnés.'
+
+export const canCreatePlaylist = (hasActiveSubscription = false) => hasActiveSubscription === true
+
+export const assertCanCreatePlaylist = (hasActiveSubscription = false) => {
+  if (!canCreatePlaylist(hasActiveSubscription)) {
+    throw new Error(PLAYLIST_CREATION_SUBSCRIPTION_MESSAGE)
+  }
+}