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/LibraryPage.tsx

@@ -162,7 +162,7 @@ export function LibraryPage() {
     handleSeriesProbe,
     handleSeriesNFO,
     handleSeriesOrganize,
-    handleSeriesSoftDelete,
+    handleSeriesDelete,
     movieActions,
   } = useLibraryAdminActions({
     libraryID: id,
@@ -283,7 +283,7 @@ export function LibraryPage() {
         onProbe={handleSeriesProbe}
         onNFO={handleSeriesNFO}
         onOrganize={handleSeriesOrganize}
-        onSoftDelete={handleSeriesSoftDelete}
+        onDelete={handleSeriesDelete}
         onSeasonChange={setSelectedSeason}
       />