Vite + TypeScript, no framework. One health board page proves the
whole path: fetch /api/health, render per-upstream verdicts. Biome
and tsc join the just ci gate; dev mode proxies /api to the daemon.
arr-daemon embeds web/dist via include_dir: build.rs runs pnpm when
available, accepts ARR_WEB_DIST prebuilt, and falls back to a
placeholder only in debug so the node-less CI rust job keeps working.
Closes#6
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>