The SSE stream URL was /api/ai-sessions/ but the backend mounts all
routes under /api/v1/. This caused a 404, falling through to a
non-streaming fallback that returned empty documentation for chat
sessions. This is why "Conclude → Resolved" never showed ticket notes.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>