Upgrade to Next.js 15.5.21 + React 19 (security) - #19
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…visories) - next 14.2.35 -> 15.5.18 (closes GHSA-8h8q-6873-q5fj and 5 more from #13) - react/react-dom 18 -> 19, @types/* to match (required by Next 15 App Router) - react-leaflet 4 -> 5 (React 19 compatible, same component API) - eslint-config-next 14 -> 15 - route.ts: params is now a Promise in Next 15 - await it Verified: npm run build passes clean; prod server smoke-tested locally.
JoeGandy
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This was referenced Aug 22, 2026
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Supersedes #13 and #18 — fixes all security advisories listed there.
Changes
next14.2.35 → 15.5.21react/react-dom→ 19 (+ @types)react-leaflet4 → 5eslint-config-next→ 15route.ts: awaited asyncparams(Next 15 requirement)Verified: production build passes on 15.5.18 and 15.5.21; homepage + tiles API smoke-tested under
next start. Closes #13, #18.