Create a "scroll this way" indicator.

TODO: center arrow and add gradient

src/components/home/playing/NowPlaying.astro

···
       contain: inline-size;
       overflow: auto visible;
 
-      display: flex;
-      flex-direction: row;
+      display: grid;
+      grid-template-columns: auto auto 40px;
       align-items: center;
+
+      &::after {
+        /* visual hint */
+        content: ">" / "";
+        position: sticky;
+        right: 0px;
+
+        height: 100%;
+        width: 40px;
+        
+        background-color: white;
+      }
     }
   }