feat(fd): restrict Payment to Matured accounts, unify its behavior with Dashboard Renew

Payment showed for both Active and Matured FDs, even though an Active FD
already has Premature Close for closing early. Now Matured-only.

That also meant a genuinely matured, past-grace FD closed via the account's
own Payment button (rather than the FD Dashboard's Renew action) silently
skipped crediting its gap-period interest -- the date-locking and
gap-interest preview/crediting were gated behind dashboard-only data, not
the account's actual matured state. Both now key off the same
renewal-preview response regardless of entry point, so Payment and Renew
are functionally identical once an FD has matured, as they should be since
they're already the same dialog component.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/deposits/fixed-deposits/fixed-deposit-account-view/fixed-deposits-buttons.config.ts

@@ -110,7 +110,18 @@ export class FixedDepositsButtonsConfiguration {
   setOptions(status: string) {
     switch (status) {
       case 'Active':
+        this.optionArray = [
+          {
+            name: 'Post Interest'
+          },
+          {
+            name: 'Add Charge'
+          }
+        ];
+        break;
       case 'Matured':
+        // Payment only makes sense once the deposit has actually matured -- an Active FD that needs
+        // closing early already has Premature Close for that.
         this.optionArray = [
           {
             name: 'Post Interest'