Phase8: Auto bill credit card

src/app/[locale]/settings/billing/page.tsx

@@ -18,6 +18,32 @@ import { BillingSettingsForm } from "@/components/settings/billing-form";
  * shared upsert path; the row's existence drives whether the
  * monthly issuance cron will pick this org up.
  */
+import { redirect, notFound } from "next/navigation";
+import { getTranslations } from "next-intl/server";
+import { getSessionUser } from "@/lib/session";
+import { getOrgBilling, getOrgBillingConfig } from "@/lib/db";
+import { BillingSettingsForm } from "@/components/settings/billing-form";
+import { SavedCardSection } from "@/components/settings/saved-card-section";
+
+/**
+ * /settings/billing — customer-side billing details management.
+ *
+ * Owner-only by visibility: non-owner members get a 404 (same
+ * response as if the page didn't exist). The link to this page
+ * is also hidden from non-owners on /billing and elsewhere, but
+ * the page itself enforces too — a non-owner who learns the URL
+ * still gets 404, not 403, so the page's existence doesn't leak.
+ *
+ * First-time visitors see an empty form. Subsequent visits see
+ * the current values, editable. Save creates or updates via the
+ * shared upsert path; the row's existence drives whether the
+ * monthly issuance cron will pick this org up.
+ *
+ * Phase 9: also renders the saved-card section (Set up auto-pay /
+ * Visa •••• 4242, expires 05/27 / Update card / Disable auto-pay /
+ * Remove card) when billing info is on file, plus a footer note
+ * explaining that bank transfer is available on request.
+ */
 export default async function BillingSettingsPage() {
   const user = await getSessionUser();
   if (!user) redirect("/login");
@@ -25,7 +51,10 @@ export default async function BillingSettingsPage() {
   if (!user.roles.includes("owner")) notFound();
 
   const t = await getTranslations("settingsBilling");
-  const existing = await getOrgBilling(user.orgId);
+  const [existing, config] = await Promise.all([
+    getOrgBilling(user.orgId),
+    getOrgBillingConfig(user.orgId),
+  ]);
 
   return (
     <main className="max-w-3xl mx-auto px-6 py-8">
@@ -43,6 +72,19 @@ export default async function BillingSettingsPage() {
           isPersonal={user.isPersonal}
         />
       </div>
+      {/* Phase 9: saved-card section. Only shown once billing info
+          exists — without an address Stripe can't create the
+          customer object, so the "Set up auto-pay" button would
+          fail anyway. We give a clear hint up there if the form
+          is empty (no need to surface the card UI). */}
+      {existing && (
+        <div className="animate-in animate-in-delay-2 mt-8">
+          <SavedCardSection
+            config={config}
+            isPayByInvoice={!!config?.payByInvoice}
+          />
+        </div>
+      )}
     </main>
   );
 }