Add Credit Top-Ups Without Requiring a Plan Upgrade

Hitting the monthly build credits as part of your subscription plan limit currently forces users to either stop work until credits reset or upgrade to a higher plan they may not actually need.

Please add the ability to purchase one-time credit top-ups (or pay-as-you-go overages) while staying on the same plan. This would be especially helpful for unpredictable workloads and multi-client projects, where a single larger build can consume a full month’s allowance.