Remove downloads management features: delete DownloadsEndpoints and related API logic, remove associated frontend components and routes, and update documentation to reflect the removal of the downloads directory from the application structure.

frontend/src/shared/api/types.ts

@@ -151,8 +151,5 @@ 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 }