I think it would be a great improvement if we could add an entire anime series to our watchlist instead of having to add each season separately.

Currently, when an anime has multiple seasons and sequels, adding everything individually can make the watchlist unnecessarily complicated.

My suggestion is to introduce an “Add Entire Series” option. This would allow users to add an anime franchise to their watchlist in one go, with all its seasons grouped under a single entry. Users could then expand that entry to view individual seasons and track their progress separately if needed.

Ideally, this feature could include:

1. A unified watchlist entry for the entire anime series.
2. Expandable seasons and related entries to keep the watchlist organised.
3. Individual progress tracking for each season, with overall series progress displayed as well.
4. An option to add specific seasons for users who don't want to track the entire series (like 2 options would be visible: "Add entire series" or "Add specific season")

This would make managing watchlists much cleaner, more convenient, and user-friendly, especially for long-running anime and franchises with multiple seasons, movies, and OVAs.

I believe this would be a meaningful quality-of-life improvement for anime fans.
Thank you for considering the suggestion!