client: add progress bar

- add favourites buttons
- redirect /folder/ => /folder/home
- minor fixes

src/router/index.js

@@ -19,6 +19,10 @@ const routes = [
     name: "FolderView",
     component: FolderView,
   },
+  {
+    path: "/folder/",
+    redirect: "/folder/home",
+  },
   {
     path: "/playlist",
     name: "PlaylistView",