First of all, thanks for this amazing tool! Restfox is exactly what I need, and I love the minimalistic and offline-first approach 😊

A minor bug/annoyance is that replacing an environment variable always ends up adding two extra closing braces, even if they are not needed. Perhaps the surrounding text in the editor could be scanned to see if the closing braces are needed or not.

Severity: This can pretty easily be worked around, but it would be a nice UX improvement.