This bug would cause the decoration script to run in an infinite loop as it
presumably attempts to decorate new elements it itself created.
(Can’t say for sure, I’m using Otter Browser on a Pentium M which isn’t
exactly the most ideal development setup. lol)
The index doesn’t have to be a PHP file since there is no need to
generate the list of chapters anew every time the ToC is opened.
Instead, the list of chapters is generated once, ahead of time, and
saved to the index.html.
As an added bonus, this allows the ToC to be generated and used
as a local file.