fix(next): logout when collection has auth cookies domain set to subdomain

[BarnabaGanko]

What

Adds support for using the domain property from a collection’s auth configuration when deleting cookies.

Why

When a cookie is set with a specific domain (for example, test.vercel.app), the browser will only delete it if the same domain is explicitly provided when calling cookies.delete.
Without this, logout operations can fail because the session token cookie remains undeleted.

There is no problem, when collection auth cookie domain config is standard domain (eg. vercel.app).

How?

Get cookie domain from collection auth config and pass it to "cookies.delete" function (if domain set).

Fixes #
There is no issue corresponding to this fix.
I get this bug when deployed payload to vercel without setting custom domain. Vercel set it's own subdomain, and then logout suddenly stopped working.

I had to add workaround like adding cookies.delete({name:"payload-token", domain: })` next to payload's logoutAction and it started working.

"use server"

import "server-only"
import { logout } from "@payloadcms/next/auth"
import { cookies as getCookies } from "next/headers"
import { env } from "@/lib/env.ts"
import config from "@/payload.config"

export const logoutUserAction = async () => {
	try {
		const result = await logout({
			allSessions: true,
			config,
		})

		const cookies = await getCookies()

		cookies.delete({
			name: "payload-token",
			domain: process.env.NODE_ENV === "production" ? env.NEXT_PUBLIC_DOMAIN : undefined,
		})

		if (!result.success) {
			return {
				success: false,
				message: "user-not-logged-out",
			}
		}

		return { success: true }
	} catch (error) {
		console.error("ERROR", error)

		return {
			success: false,
			message: "user-not-logged-out",
		}
	}
}