watched‑episode indicator

It would be incredibly useful if this platform implemented a clear watched‑episode indicator—whether through a color shift, a checkmark, or any visual cue. When you’re following long series or juggling multiple shows, having an immediate, at‑a‑glance way to see what you’ve already watched isn’t just convenient; it’s basic usability. A small design change like that can dramatically improve navigation, reduce confusion, and make the overall viewing experience feel more intentional and organized.