Trilium has added a TOC sidebar out of the box

[jakebesworth]

https://github.com/zadam/trilium/releases/tag/v0.53.2

Looks like your work has been integrated into TOC proper now, and thus this widget is no longer required.

It's the same code from the bottom left bar, now just on the right with a sliding bar.

Might want to mention in this project or archive or otherwise. Regardless, thank you very much for your hard work. The TOC you designed has been wonderful to use!