Add torrent client integration and downloads management: introduce qbittorrent service in Docker setup, implement downloads endpoint in API, and enhance media storage to handle imported files. Update frontend routes and translations for downloads management.

frontend/src/shared/api/types.ts

@@ -151,5 +151,8 @@ export type ScheduleEntryDto = {
   episodeIndex: number | null
 }
 
+// ── Загрузки (торрент) ─────────────────────────────────────────────────────
+export type DownloadFileDto = { relativePath: string; name: string; sizeBytes: number }
+
 // ── Публичный эфир ─────────────────────────────────────────────────────────
 export type PublicChannelDto = { id: string; slug: string; name: string }