feat(web): My Wave button, mood picker and endless wave playback (M4)

- WaveButton: TypeScript port of the prototype's canvas animation
  (orb and liquid), breathing at rest, pulsing to the track's BPM and
  energy in the cover palette, following the cursor, pressing with a
  spring; reduced motion and hidden tabs slow or stop it
- home: the wave in the centre with activity and mood chips; changing
  them while playing rebuilds the upcoming tracks without stopping
- player wave mode: asks for the next batch when two tracks are left,
  sends complete / skip / early skip / like / dislike as feedback and
  refreshes the queue right after a reaction or an early skip
- tracks expose bpm, energy and loudness once analysed; library page
  shows analysis progress and 7-day wave metrics; wave style setting

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

packages/i18n/locales/ru/admin.json

@@ -148,6 +148,16 @@
     "sources": "Хранилища",
     "error_files": "Файлы с ошибками",
     "reindex": "Переиндексировать поиск",
-    "reindex_started": "Переиндексация запущена"
+    "reindex_started": "Переиндексация запущена",
+    "analysis": "Аудиоанализ",
+    "analysis_progress": "Проанализировано {{done}} из {{total}}",
+    "analysis_failed": "Не удалось проанализировать: {{count}}",
+    "analyzer": "Версия анализатора: {{ver}}",
+    "wave": "Моя волна за 7 дней",
+    "wave_served": "Выдано треков",
+    "wave_sessions": "Сессий",
+    "wave_listen": "Дослушано ≥ 50%",
+    "wave_early_skip": "Ранние скипы",
+    "wave_likes": "Лайков на 100"
   }
 }