[Bug] civicdataspace.innull — null env var concatenated to API base URL on Evaluators page

Summary

The Evaluators page (/dashboard/ai-maker/{id}/auditors) fires 6 network requests to https://dev.api.civicdataspace.innull/ — a malformed URL where a null value is concatenated directly to the API base URL string. All 6 requests fail with ERR_NAME_NOT_RESOLVED, causing the evaluators list to never load.

Impact

• Evaluators page is completely broken — the list never loads
• Root cause: a variable holding part of the API URL is null (likely an unset env var or missing config) and is concatenated without a null guard

Fix

1. Find the URL construction for the evaluators API call — add a null guard before concatenation
2. Ensure all required env vars are validated on app startup
3. Add a fallback error state on the Evaluators page when the API call fails

Report ref: INFRA-004 · Severity: HIGH