ios: sort artists, albums, songs and playlists (1.0.5)

Plexamp-style sort menu on each library list: pick a field, pick it again
to flip direction. Choice is saved per screen.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ios/Stemify/UI/Screens/PlaylistScreens.swift

@@ -6,6 +6,7 @@ struct PlaylistsScreen: View {
     @Environment(Ui.self) private var ui
     @State private var lists: LoadState<[Playlist]> = .loading
     @State private var reload = 0
+    private let sort = SortState("playlists", PLAYLIST_SORTS)
     private var g: AppGraph { .shared }
 
     var body: some View {
@@ -21,12 +22,13 @@ struct PlaylistsScreen: View {
             }
         }
         .toolbar {
+            ToolbarItem(placement: .topBarTrailing) { SortMenu(sort: sort) }
             ToolbarItem(placement: .topBarTrailing) {
                 Button { newPlaylist() } label: { Image(systemName: "plus") }
             }
         }
-        .task(id: "\(g.settings.musicSection)|\(reload)") {
-            await LoadState.load($lists) { try await g.plex.playlists() }
+        .task(id: "\(g.settings.musicSection)|\(sort.param)|\(reload)") {
+            await LoadState.load($lists) { try await g.plex.playlists(sort: sort.param) }
         }
     }