Track and filter credits on support tickets

Credits you're owed on support tickets used to be buried in your invoices. Two changes make them easier to follow. The support-requests table now tracks the credited amount on any ticket, whatever its reason, so you can see it in one place.

And a new Credit filter lets you sort the table by status: No credit for tickets closed without one, Credit on next invoice for a credit that's approved but not yet applied, and Credited for those already settled, with the amount shown. That makes it quick to see which tickets still need a decision, separate what's pending from what's done, and reconcile credits against your invoices.

To use it: apply the Credit filter on the support-requests table. Credited amounts are tracked automatically.