Aligns the error variable types in the subscription-first path so that quota fallback checks use the correct NewAPIError.
This prevents build failures and preserves the intended wallet fallback when subscription pre-consume returns an insufficient quota error.
Add a lightweight active-subscription check to skip subscription pre-consume when none exist, reducing unnecessary transactions and locks. In the subscription UI, disable subscription-first options when no active plan is available, show the effective fallback to wallet with a clear notice, and distinguish “invalidated” from “expired” states. Update i18n strings across supported locales to reflect the new messages and status labels.
