The new react-hooks lint rule "Calling setState synchronously within an
effect can trigger cascading renders" flagged real anti-patterns in
four spots. Refactored each per the rule's intent (derive during render,
or use useSyncExternalStore for external subscriptions).
1. hooks/useMediaQuery.ts — replaced the useState + useEffect pair with
useSyncExternalStore. That's the canonical React hook for
subscribing to external stores (matchMedia in this case) without
mirroring into local state via an effect. Snapshot/getServerSnapshot
pair preserves the SSR-safe behaviour.
2. components/network/nodes/DeviceNode.tsx — the prop-sync useEffect
that copied nodeData.label into labelValue was redundant.
labelValue is the EDIT BUFFER; while not editing, the displayed
span now reads nodeData.label directly. The buffer is initialized
only when an edit session starts (onDoubleClick).
3. components/network/nodes/GroupNode.tsx — same pattern, same fix.
4. components/dashboard/TicketQueue.tsx — the
setTickets([]) + setLoading(true) + fetchTickets() chain in the
effect was the cascade. Pushed those writes inside fetchTickets
(after the function boundary, so they batch with the eventual
setTickets(result)). Added a request-id ref so a slow first
response can't overwrite a fast second one.
Frontend lint: 20 errors → 0 errors. tsc -b clean.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
