Both pages crashed to a blank "client-side exception" screen in production. React error #310: the useState calls sat *below* `if (authLoading || (!isAdmin && !isOperator)) return null`, so the first render returned before reaching them and the next render, once auth resolved, ran more hooks than the previous one. React tracks hooks by call order and refuses. The guard itself is fine and stays where it is -- only the hook declarations move above it. Behaviour is unchanged for a user who passes the guard, and a user who fails it still renders nothing before the effect redirects them. Found by walking the deployed site: /nodes and /systems were the only two routes that failed outright rather than merely showing empty data. The empty data everywhere else is the org_id backfill, which is a separate problem. npx tsc --noEmit clean. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>