Enhance show deletion functionality to support media removal option

Updated the DeleteShowCommand and its handler to include an optional parameter for media deletion, allowing users to remove associated media files when deleting a show. Refactored related components and API calls to accommodate this new feature, ensuring a seamless user experience. Additionally, updated localization strings to reflect the new functionality and adjusted tests to verify the correct behavior of the deletion process with and without media.

frontend/src/features/admin/shows/api.ts

@@ -79,8 +79,10 @@ export function getShowUsage(id: string) {
   return apiRequest<ShowUsageDto>(`/admin/shows/${id}/usage`)
 }
 
-export function deleteShow(id: string) {
-  return apiRequest<void>(`/admin/shows/${id}`, { method: 'DELETE' })
+/** `withMedia` — снести заодно файлы шоу: иначе они переживут его осиротевшими. */
+export function deleteShow(id: string, withMedia = false) {
+  const query = withMedia ? '?withMedia=true' : ''
+  return apiRequest<void>(`/admin/shows/${id}${query}`, { method: 'DELETE' })
 }
 
 export function addEpisode(showId: string, mediaAssetId: string) {