refactor(web): migrate 4 open-coded cover URL sites to coverUrl() helper (C1 small-win)

web/src/routes/admin/quarantine/+page.svelte

@@ -12,6 +12,7 @@
   import { errMessage } from '$lib/api/errors';
   import { pushToast } from '$lib/stores/toast.svelte';
   import { playRadio } from '$lib/player/store.svelte';
+  import { coverUrl } from '$lib/media/covers';
   import Modal from '$lib/components/Modal.svelte';
   import type { AdminQuarantineRow, LidarrQuarantineReason } from '$lib/api/types';
 
@@ -191,7 +192,7 @@
           >
             {#if r.album_id}
               <img
-                src={`/api/albums/${r.album_id}/cover`}
+                src={coverUrl(r.album_id)}
                 alt=""
                 class="h-full w-full rounded-md object-cover"
                 loading="lazy"