[BUG] Environment variables for STDIO servers don't work on the MacOS desktop app

# Issue

Environmental variables added to servers on the MacOS desktop application are not passed through to the server, and cannot be viewed in the app. Attempting to reveal the environment variables results in the error: "Couldn't reveal saved secrets. Try again, or re-save this server's env vars/headers."

# How to reproduce

1. Create a new STDIO server with at least one env var.
2. Reopen the STDIO server's detail page and attempt to reveal the env vars.

# Expected Behavior

Environment variables are passed to the STDIO server and can be viewed in the app.

# Screenshots

# Platform

Mac App

# Additional Context

Version 2.8.1