Ensure the effective output hash salt, including `NEXT_HASH_SALT`, is applied consistently to the server-side `assetsHashes` emitted to build adapters. For otherwise identical builds, changing `NEXT_HASH_SALT` must change the reported hash of every server-side asset across Pages, Pages API, App Pages, and App Routes. Preserve existing behavior when the effective salt is empty and continue emitting complete server-side asset hashes.