Remove unused recycle bin and add optional local file delete (#26)

Soft-delete restore/purge/list and the recycle_purge job are gone.
Admin delete now removes library index rows, with an optional
delete_files query that also deletes local media + sidecar NFO.
UI copy is renamed from 移入回收站 to 删除, with a confirm checkbox.

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: truewhile <truewhile@users.noreply.github.com>

web/src/pages/MediaDetailPage.tsx

@@ -42,7 +42,7 @@ export function MediaDetailPage() {
         onOrganize={() => detail.setOrganizeOpen(true)}
         onProbe={detail.reprobe}
         onExportNFO={detail.exportNFO}
-        onSoftDelete={detail.softDelete}
+        onDelete={detail.deleteMedia}
       />
 
       {detail.hasEpisodes && (