Delete Dockerfile.frontend and docker-entrypoint-fe.sh (single-image
decision per ROADMAP). Remove gutted /chat, /notes, /projects routes
from nginx.conf. Fix Chat Switchboard branding in entrypoint and
.env.example. Update DB names to switchboard_core, remove dead
Extraction config.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
