I highly recommend Zettlr [1]. I used it exclusively for writing my Masters thesis and it won me over. Pandoc and Zotero integrations make the whole process incredibly smooth, but still leave you with a clean, minimalist editor and interface.
That being said, great work by OP. I used to love writing with Notepad, but massive numbers of documents demand organization and digging into external folders just doesn't always cut it, and sometimes I really can use a bit more versatility. I've tried a number of different solutions over the years, the best of which was a customized setup of Atom, but it was still clunky. If I hadn't already found Zettlr, I'd have loved to give OP's beautiful setup a shot. I still might just for fun.
That being said, great work by OP. I used to love writing with Notepad, but massive numbers of documents demand organization and digging into external folders just doesn't always cut it, and sometimes I really can use a bit more versatility. I've tried a number of different solutions over the years, the best of which was a customized setup of Atom, but it was still clunky. If I hadn't already found Zettlr, I'd have loved to give OP's beautiful setup a shot. I still might just for fun.
[1] https://www.zettlr.com
Edit: Adding that Zettlr is free and open source and actively developed/maintained.