Replace the old React Router SSR setup with a static SPA build served by fabro-server, move setup and GitHub auth handling into Rust, and update the default local web URL and stale Arc-era references to match the Fabro name.
Rename directories (arc-web → fabro-web, arc-api-client → fabro-api-client), update package names, import paths, TS-only identifiers (theme key, session cookie, demo cookie, OAuth state, db filename, mock data), and supporting files (Dockerfile, docker-compose, entrypoint, CI workflow, CLAUDE.md). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
