Enhance metadata handling and UI feedback: add support for jingles in channel queries, implement error handling for metadata provider requests, and improve search functionality in ShowMetadataCard with user feedback for no results found. Update translations for new UI messages.

frontend/src/features/admin/shows/ShowMetadataCard.tsx

@@ -27,6 +27,7 @@ export function ShowMetadataCard({ show, onChanged }: { show: ShowDto; onChanged
   const [provider, setProvider] = useState('')
   const [query, setQuery] = useState(show.name)
   const [results, setResults] = useState<MetadataCandidate[]>([])
+  const [searched, setSearched] = useState(false)
   const [description, setDescription] = useState(show.description ?? '')
   const [year, setYear] = useState(show.year != null ? String(show.year) : '')
 
@@ -46,13 +47,17 @@ export function ShowMetadataCard({ show, onChanged }: { show: ShowDto; onChanged
 
   const search = useMutation({
     mutationFn: () => searchMetadata(effectiveProvider, query.trim()),
-    onSuccess: setResults,
+    onSuccess: (data) => {
+      setResults(data)
+      setSearched(true)
+    },
     onError,
   })
   const apply = useMutation({
     mutationFn: (externalId: string) => applyMetadata(show.id, effectiveProvider, externalId),
     onSuccess: () => {
       setResults([])
+      setSearched(false)
       toast.success(t('admin.metadata.applied'))
       changed()
     },
@@ -159,7 +164,10 @@ export function ShowMetadataCard({ show, onChanged }: { show: ShowDto; onChanged
                 <Input
                   className="min-w-40 flex-1"
                   value={query}
-                  onChange={(e) => setQuery(e.target.value)}
+                  onChange={(e) => {
+                    setQuery(e.target.value)
+                    setSearched(false)
+                  }}
                   placeholder={t('admin.metadata.searchPlaceholder')}
                 />
                 <Button size="sm" disabled={search.isPending || !query.trim()} onClick={() => search.mutate()}>
@@ -167,6 +175,10 @@ export function ShowMetadataCard({ show, onChanged }: { show: ShowDto; onChanged
                 </Button>
               </div>
 
+              {searched && results.length === 0 && (
+                <p className="text-xs text-muted-foreground">{t('admin.metadata.nothingFound')}</p>
+              )}
+
               {results.length > 0 && (
                 <ul className="crt-panel max-h-72 divide-y divide-border overflow-y-auto rounded-md">
                   {results.map((r) => (