I know this isn’t an answer to your question, but - ViMusic has a radio function? Where?

I’ve seen a lot of descriptions of Tailscale but still have no idea what exactly it does. I get that it uses Wireguard, but what differentiates it from a typical VPN setup? NAT traversal?

Have you looked into either Obsidian or Logseq?

Obsidian is not open source, but uses Markdown for notes just like Logseq. Very popular overall.