Never import constants from 'use server' modules into Client Components

TL;DR

A file with 'use server' only safely exports async server actions to the client. Non-async exports (arrays, objects, enums) become opaque proxies / undefined on the client. Calling .map on them → TypeError: p.map is not a function during SSR.

Symptoms on Protos-Web: /admin/konfigurator 500, Vercel log pointing at AssetLibrary chunk, ADMIN_ASSET_CATEGORIES.map(...).

Fix pattern

src/lib/foo-types.ts          ← constants + types (client-safe)
src/actions/foo.ts            ← 'use server'; import types from lib/
src/components/.../Bar.tsx    ← import constants from lib/, actions from actions/

Vidi također

• memory/sessions/2026-07-22-06-sentry-rip-out-and-konfigurator-verify.md
• Protos-Web src/lib/admin-assets-types.ts