The agent list moved from /api/v1/agents to /api/v1/environments/{envSlug}/agents;
the 'valid JWT returns 200' test was hitting the retired flat path and
getting 404. The other 'without JWT' cases still pass because Spring
Security rejects them at the filter chain before URL routing.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>