fix(library): show play actions during batch downloads

lib/providers/download_history_provider.dart

@@ -1135,6 +1135,61 @@ final downloadHistoryBatchExistsProvider = FutureProvider.autoDispose
       };
     });
 
+bool historyLookupExistsInMemory(
+  DownloadHistoryState state,
+  HistoryLookupRequest request,
+) {
+  for (final candidate in HistoryDatabase.spotifyLookupCandidates(
+    request.spotifyId,
+  )) {
+    if (state.getBySpotifyId(candidate) != null) return true;
+  }
+
+  final isrc = request.isrc?.trim();
+  if (isrc != null && isrc.isNotEmpty && state.getByIsrc(isrc) != null) {
+    return true;
+  }
+
+  return state.findByTrackAndArtist(request.trackName, request.artistName) !=
+      null;
+}
+
+Set<String> mergeVisibleHistoryLookupKeys({
+  required DownloadHistoryState state,
+  required HistoryBatchLookupRequest request,
+  required Set<String> persistedKeys,
+}) {
+  final keys = <String>{...persistedKeys};
+  for (final track in request.tracks) {
+    if (historyLookupExistsInMemory(state, track)) {
+      keys.add(track.lookupKey);
+    }
+  }
+  return keys;
+}
+
+/// UI-facing history lookup that keeps the last database result visible while
+/// a batch query reloads and immediately merges downloads persisted in memory.
+/// This prevents completed tracks from losing their Play action until the
+/// remainder of a large download batch finishes.
+final downloadHistoryVisibleBatchExistsProvider = Provider.autoDispose
+    .family<Set<String>, HistoryBatchLookupRequest>((ref, request) {
+      final state = ref.watch(downloadHistoryProvider);
+      final persistedKeys = ref
+          .watch(downloadHistoryBatchExistsProvider(request))
+          .maybeWhen(
+            skipLoadingOnReload: true,
+            skipLoadingOnRefresh: true,
+            data: (keys) => keys,
+            orElse: () => const <String>{},
+          );
+      return mergeVisibleHistoryLookupKeys(
+        state: state,
+        request: request,
+        persistedKeys: persistedKeys,
+      );
+    });
+
 class DownloadedAlbumTracksRequest {
   final String albumName;
   final String artistName;

lib/screens/album_screen.dart

@@ -552,13 +552,11 @@ class _AlbumScreenState extends ConsumerState<AlbumScreen>
     final historyLookups = tracks
         .map(historyLookupForTrack)
         .toList(growable: false);
-    final existingHistoryKeys = ref
-        .watch(
-          downloadHistoryBatchExistsProvider(
-            HistoryBatchLookupRequest(historyLookups),
-          ),
-        )
-        .maybeWhen(data: (keys) => keys, orElse: () => const <String>{});
+    final existingHistoryKeys = ref.watch(
+      downloadHistoryVisibleBatchExistsProvider(
+        HistoryBatchLookupRequest(historyLookups),
+      ),
+    );
     return SliverPadding(
       padding: EdgeInsets.symmetric(horizontal: wideListInset(context)),
       sliver: SliverList(

lib/screens/artist_screen_widgets.dart

@@ -311,13 +311,11 @@ extension _ArtistScreenSections on _ArtistScreenState {
     final historyLookups = tracks
         .map(historyLookupForTrack)
         .toList(growable: false);
-    final existingHistoryKeys = ref
-        .watch(
-          downloadHistoryBatchExistsProvider(
-            HistoryBatchLookupRequest(historyLookups),
-          ),
-        )
-        .maybeWhen(data: (keys) => keys, orElse: () => const <String>{});
+    final existingHistoryKeys = ref.watch(
+      downloadHistoryVisibleBatchExistsProvider(
+        HistoryBatchLookupRequest(historyLookups),
+      ),
+    );
     const tracksPerPage = 5;
     final pageCount = (tracks.length / tracksPerPage).ceil();
 

lib/screens/home_tab_search_results.dart

@@ -406,13 +406,11 @@ extension _HomeTabSearchResultsUI on _HomeTabState {
       final historyLookups = sortedTracks
           .map(historyLookupForTrack)
           .toList(growable: false);
-      final existingHistoryKeys = ref
-          .watch(
-            downloadHistoryBatchExistsProvider(
-              HistoryBatchLookupRequest(historyLookups),
-            ),
-          )
-          .maybeWhen(data: (keys) => keys, orElse: () => const <String>{});
+      final existingHistoryKeys = ref.watch(
+        downloadHistoryVisibleBatchExistsProvider(
+          HistoryBatchLookupRequest(historyLookups),
+        ),
+      );
       slivers.addAll(
         _buildVirtualizedResultSection(
           title: context.l10n.searchSongs,

lib/screens/library_tracks_folder_screen.dart

@@ -302,13 +302,11 @@ class _LibraryTracksFolderScreenState
     final historyLookups = folderTracks
         .map(historyLookupForTrack)
         .toList(growable: false);
-    final existingHistoryKeys = ref
-        .watch(
-          downloadHistoryBatchExistsProvider(
-            HistoryBatchLookupRequest(historyLookups),
-          ),
-        )
-        .maybeWhen(data: (keys) => keys, orElse: () => const <String>{});
+    final existingHistoryKeys = ref.watch(
+      downloadHistoryVisibleBatchExistsProvider(
+        HistoryBatchLookupRequest(historyLookups),
+      ),
+    );
 
     final bottomPadding = MediaQuery.paddingOf(context).bottom;
     final bottomInset = context.navBarBottomInset;

lib/screens/playlist_screen.dart

@@ -399,13 +399,11 @@ class _PlaylistScreenState extends ConsumerState<PlaylistScreen>
     final historyLookups = _tracks
         .map(historyLookupForTrack)
         .toList(growable: false);
-    final existingHistoryKeys = ref
-        .watch(
-          downloadHistoryBatchExistsProvider(
-            HistoryBatchLookupRequest(historyLookups),
-          ),
-        )
-        .maybeWhen(data: (keys) => keys, orElse: () => const <String>{});
+    final existingHistoryKeys = ref.watch(
+      downloadHistoryVisibleBatchExistsProvider(
+        HistoryBatchLookupRequest(historyLookups),
+      ),
+    );
     return SliverPadding(
       padding: EdgeInsets.symmetric(horizontal: wideListInset(context)),
       sliver: SliverList(