Adding or editing environment variables in the worker group config drawer
did not enable the "Apply changes" button. `hasChanges` compares the original
`config` prop against the local `nconfig` copy, but env var edits only mutate
the local `customEnvVars` array — they aren't synced into
`nconfig.env_vars_static`/`env_vars_allowlist` until the Apply handler runs.
This left the button stuck disabled despite real changes.
Add a `hasEnvVarChanges` derived that reconstructs the original env vars from
`config` and compares them to the current `customEnvVars`, and include it in
the Apply button's disabled condition.
Fixes WIN-2023
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
hugocasaandClaude Opus 4.8
c80c6d8fcd