Function pick

src/config.js:95–95

(v)

  // fails URL validation (#580 Bug 1). `||` alone would also pick a
  // whitespace-only override as "truthy", so trim-then-fall-through here.
  const pick = (v) => { const t = (v == null ? '' : String(v)).trim(); return t || null; };
  const raw = pick(process.env.A2A_HUB_URL)
    || pick(process.env.EVOMAP_HUB_URL)
    || pick(process.env.EVOLVER_DEFAULT_HUB_URL)