feat(web): storage admin, search and catalog pages (M2)

- Storage admin: local folders with a folder picker and NFS sources,
  connection test, scan and full scan with live progress, enable,
  disable, delete
- path pattern editor with reorder, examples and a preview table that
  shows which pattern matched and what came from tags; compile errors
  land under the broken pattern
- Library page with counters, scans and unreadable files; search
  reindex for admins
- search box in the top bar: combobox with keyboard navigation, 150 ms
  debounce, cancelled stale requests, "/" and Ctrl+K, layout fix hint
- search page with tabs and paging, artist and album pages, album
  cards and track lists; unavailable tracks are dimmed

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

packages/i18n/locales/ru/common.json

@@ -23,7 +23,9 @@
     "home": "Главная",
     "admin": "Админка",
     "users": "Пользователи",
-    "audit": "Журнал"
+    "audit": "Журнал",
+    "library": "Библиотека",
+    "sources": "Хранилища"
   },
   "profile": {
     "menu": "Меню профиля",
@@ -79,5 +81,41 @@
   "loading": "Загрузка…",
   "route_error": {
     "reload": "Обновить страницу"
+  },
+  "search": {
+    "placeholder": "Исполнители, альбомы, треки",
+    "label": "Поиск",
+    "artists": "Исполнители",
+    "albums": "Альбомы",
+    "tracks": "Треки",
+    "all": "Всё",
+    "nothing": "Ничего не нашли",
+    "corrected": "Показаны результаты для «{{query}}»",
+    "show_all": "Все результаты",
+    "title": "Поиск: {{query}}",
+    "more": "Показать ещё",
+    "artist_kind": "Исполнитель",
+    "hint": "Нажмите / для поиска"
+  },
+  "catalog": {
+    "albums": "Альбомы",
+    "appears_on": "Встречается на",
+    "album_count_one": "{{count}} альбом",
+    "album_count_few": "{{count}} альбома",
+    "album_count_many": "{{count}} альбомов",
+    "album_count_other": "{{count}} альбома",
+    "track_count_one": "{{count}} трек",
+    "track_count_few": "{{count}} трека",
+    "track_count_many": "{{count}} треков",
+    "track_count_other": "{{count}} трека",
+    "unavailable": "Недоступен: хранилище отключено или файл пропал",
+    "not_found": "Ничего не найдено — возможно, удалено при последнем скане",
+    "disc": "Диск {{n}}",
+    "col_title": "Название",
+    "col_album": "Альбом",
+    "col_duration": "Время",
+    "back_home": "На главную",
+    "artist": "Исполнитель",
+    "album": "Альбом"
   }
 }