I totally understand your motivation. I've written several Electron-based markdown editors in a struggle to do the same as you. Though I think I made my scope too large to satisfy.
The current editors out there are really not good enough because many tools are great for writing but not for editing, publishing, or writing multi-markdown documents.
Inkdrop comes as close as possible since it has taken a modular approach where you can install various plugins, though InkDrop has yet to reach the maturity which will satisfy my needs.
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