Unofficial patch for @Min_ 's https://greasyfork.org/en/scripts/5835-ao3-kudosed-and-seen-history



1. Add History Export/Import buttons at the bottom for when it gets too large to copy-paste. (Also restores the username&settings.)
2. Rename the Unseen/Seen buttons to "SEEN (click to unmark)"/"UNSEEN (click to mark)" and color them to make the state/action more explicit.
3. Turn the Title into a colored link to the current page; it can be clicked to quickly mark the page as seen and improves visibility.
4. "Mark as seen on open" is reimplemented to ignore links external to AO3. Also differentiates "SEEN Now" from "Old SEEN" in case you didn't pay attention when opening it:
     To enable this feature:
     You need to disable the old setting inside of "AO3: Kudosed and seen history":
     → [Seen works > Settings and import/export > Mark as seen on open: NO].

Standalone Feature: Merged to efficiently share the button bar, but can be used without @Min_'s script.
5. Add quick (Light/Dark) skin toggle button at the bottom, without needing to go through preferences.
     Custom skins: The default skins are ["Default", "Reversi"], you can edit the script and replace them with custom names (if more than 2, they cycle).

Each features can be disabled by editing the script and setting top constants to 'false', but you may want to disable updates or will have to redo it each time.