shared playlists: a deleted playlist takes its share with it, so the next one does not go out wearing its name

src-tauri/src/playlists.rs

@@ -202,6 +202,10 @@ pub async fn delete_playlist(
     lib: State<'_, LibraryState>,
     id: i64,
 ) -> Result<(), String> {
+    // Before the local truth goes, not after: a share this device can no
+    // longer honour is withdrawn and its ledger row dropped, or the next
+    // playlist to be handed this row id publishes as the one just deleted.
+    crate::shared_playlists::forget_playlist(&app, id).await;
     let l = lib.library.clone();
     tauri::async_runtime::spawn_blocking(move || l.delete_playlist(id))
         .await