feat(add watchlist): adding midding functionality from overserr

feat(add watchlist): adding missing functionality from overserr

src/components/MediaSlider/index.tsx

@@ -95,7 +95,9 @@ const MediaSlider = ({
       case 'movie':
         return (
           <TitleCard
+            key={title.id}
             id={title.id}
+            isAddedToWatchlist={title.mediaInfo?.watchlists?.length ?? 0}
             image={title.posterPath}
             status={title.mediaInfo?.status}
             summary={title.overview}
@@ -109,7 +111,9 @@ const MediaSlider = ({
       case 'tv':
         return (
           <TitleCard
+            key={title.id}
             id={title.id}
+            isAddedToWatchlist={title.mediaInfo?.watchlists?.length ?? 0}
             image={title.posterPath}
             status={title.mediaInfo?.status}
             summary={title.overview}