"Next Payment" Section Added to Subscription Dashboard

We’ve enhanced the subscription dashboard in the Nadles API consumer portal with a new "Next Payment" section, now available for subscriptions using Paddle or Stripe integration.

This section gives customers a clear preview of their upcoming payment, including:
💳 Recurring amount – The fixed subscription fee (if applicable).
📈 Usage charges – The amount based on billable metric usage.
🧾 Total amount – The full sum that will be charged at the next billing cycle.
🔁 Credit or debit balance – Any outstanding balance (positive or negative) that will be applied to the next payment.
This update helps users stay informed about what they'll pay and why — promoting transparency in usage-based and hybrid billing models.