React19: Fix build by extracting const in a separate file

The build did not like that we imported the useMapParam file inside the middleware even though we only picked the mapParamFallback const from it. Moving the const to a separate file resolved the issue.

src/app/regionen/[regionSlug]/_hooks/useQueryState/useCategoriesConfig/migrations/0001_from_middleware.ts

@@ -1,4 +1,4 @@
-import { mapParamFallback } from '../../useMapParam'
+import { mapParamFallback } from '../../utils/mapParamFallback.const'
 import { serializeMapParam } from '../../utils/mapParam'
 import { UrlMigration } from './types'
 

src/app/regionen/[regionSlug]/_hooks/useQueryState/useMapParam.ts

@@ -2,8 +2,7 @@ import { createParser, useQueryState } from 'nuqs'
 import { useStaticRegion } from 'src/app/regionen/[regionSlug]/_components/regionUtils/useStaticRegion'
 import { parseMapParam, serializeMapParam } from './utils/mapParam'
 import { searchParamsRegistry } from './searchParamsRegistry'
-
-export const mapParamFallback = { lat: 52.5, lng: 13.4, zoom: 12.1 }
+import { mapParamFallback } from './utils/mapParamFallback.const'
 
 export const useMapParam = () => {
   const region = useStaticRegion()

src/app/regionen/[regionSlug]/_hooks/useQueryState/utils/mapParamFallback.const.ts

@@ -0,0 +1 @@
+export const mapParamFallback = { lat: 52.5, lng: 13.4, zoom: 12.1 }