keeping track of previously available chapters and Auto Unlocking next chapter

[neroes]

some sites have temporary access it makes it hard to keep track of what chapters have been downloaded,
i have also seen some issues stemming from this such as redownloading chapters or it registering chapters as completed even though 0/0 was downloaded
i surgest expanding the bookmark feature to also keep track of locked chapters

and as a bonus it would be great if it could auto unlock next available chapter provided one is logged in and the site provides such a feature