fix app grid layout issues

+ fully move now playing to bottom bar
+ add hover state to playlist card
+ handle playing tracks from queue page

src/components/PlaylistsList/PlaylistCard.vue

@@ -38,7 +38,7 @@ const props = defineProps<{
 
   &:hover {
     transition: all .25s ease;
-    background-color: $darkestblue;
+    background-color: $gray3;
     background-blend-mode: screen;
   }