Client Extensions don't type well with `auth()` in `@default`

[nahtnam]

Description and expected behavior
When using client extensions, the type gets thrown off with auth() in @default

Screenshots
If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• ZenStack version: 2.1.0
• Prisma version: 5.13
• Database type: Postgres

Additional context

https://discord.com/channels/1035538056146595961/1245476523595534337/1245476523595534337

Code

import crypto from "node:crypto";
import { PrismaClient } from "@prisma/client";
import { enhance } from "@zenstackhq/runtime";

const prismaClientSingleton = () => {
    return new PrismaClient().$extends({
        result: {
            user: {
                gravatarUrl: {
                    needs: { email: true },
                    compute(user) {
                        const hash = crypto.createHash("md5");
                        hash.update(user.email);
                        return `https://www.gravatar.com/avatar/${hash.digest("hex")}`;
                    },
                },
            },
        },
    });
};

// biome-ignore lint/suspicious/noShadowRestrictedNames: used for dev mode
declare const globalThis: {
    prismaGlobal: ReturnType<typeof prismaClientSingleton>;
} & typeof global;

export const _prisma = globalThis.prismaGlobal ?? prismaClientSingleton();
if (process.env.NODE_ENV !== "production") globalThis.prismaGlobal = _prisma;

export const dbAdmin = enhance(_prisma, undefined, { kinds: [] });

_prisma.user.findFirst().then((user) => user?.gravatarUrl);
dbAdmin.user.findFirst().then((user) => user?.gravatarUrl);