Auto-dismiss friendship status notifications

## Description Friendship status notifications (friend request sent, accepted, etc.) currently remain on screen indefinitely and require manual dismissal by the user. ## Expected Behavior These notifications should automatically disappear after a short period (e.g., 3-5 seconds), similar to typical toast notifications in mobile apps. ## Current Behavior Notifications persist until manually dismissed by the user. ## Suggested Implementation Add an auto-dismiss timeout for friendship status notifications while still allowing users to manually dismiss them earlier if desired. --- Requested by rob via Slack