feat(web): align the web UI with the design prototype

- Ambient background in the app shell: three drifting blurred blobs,
  the third one tinted with the current track's cover; can be turned off
  in settings and stays still with reduced motion.
- Island player variant (floating glass panel) next to the bar, chosen
  in settings; player source line ("Album · …", "My Wave"), reactions
  around the transport controls, queue drawer.
- Sidebar: like / dislike counters, pending uploads badge on Queue,
  admin Settings page holding the upload queue limits.
- Collection: header tile with kicker, underline tabs, time / number
  lead column with an equalizer for the current track, album column,
  dimmed dislikes with undo, Play all / Shuffle pills.
- Album: cover-tinted header and Play / Shuffle; artist: artist wave,
  Play and popular tracks (new GET /artists/{id}/top-tracks).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/src/pages/admin/AdminSettingsPage.tsx

@@ -0,0 +1,20 @@
+import { useTranslation } from 'react-i18next';
+
+import s from '../page.module.css';
+import { UploadSettingsSection } from './UploadQueuePage';
+
+/** «Настройки» админки: параметры сервера, которые меняет администратор (пока — очередь на добавление). */
+export function AdminSettingsPage() {
+  const { t } = useTranslation('admin');
+  return (
+    <div className={s.page}>
+      <div className={s.head}>
+        <div>
+          <h1>{t('server_settings.title')}</h1>
+          <p className={s.subtitle}>{t('server_settings.subtitle')}</p>
+        </div>
+      </div>
+      <UploadSettingsSection />
+    </div>
+  );
+}