Phase2: Invoicecomputation/AdminpricingUI/Ainvoicemgnt

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

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+import Link from "next/link";
+import { redirect } from "next/navigation";
+import { getTranslations } from "next-intl/server";
+import { getSessionUser } from "@/lib/session";
+import { getOrgOpenBalances, syncOverdueInvoices } from "@/lib/db";
+import { Card } from "@/components/ui/card";
+
+/**
+ * /admin/billing — landing page with sub-section links and a
+ * quick overview of orgs in arrears.
+ *
+ * Sub-pages:
+ *   - /admin/billing/pricing   — platform + skill prices
+ *   - /admin/billing/generate  — manual invoice generator (testing)
+ *   - /admin/billing/invoices  — invoice list/detail
+ *
+ * The Phase 2 customer-side /billing landing page is added in
+ * Phase 3.
+ */
+export default async function AdminBillingPage() {
+  const user = await getSessionUser();
+  if (!user) redirect("/login");
+  if (!user.isPlatform) redirect("/dashboard");
+  const t = await getTranslations("adminBilling");
+
+  // Sweep open invoices past due → 'overdue' so the counters below
+  // reflect reality without needing a cron.
+  await syncOverdueInvoices().catch((e) =>
+    console.error("syncOverdueInvoices failed:", e)
+  );
+  const balances = await getOrgOpenBalances().catch(() => []);
+  const totalOpen = balances.reduce((acc, b) => acc + b.totalOpenChf, 0);
+  const totalOverdue = balances.reduce((acc, b) => acc + b.overdueCount, 0);
+
+  return (
+    <main className="max-w-5xl mx-auto px-6 py-8">
+      <div className="mb-8 animate-in">
+        <h1 className="font-display text-2xl font-semibold accent-rule">
+          {t("title")}
+        </h1>
+        <p className="text-sm text-text-secondary mt-3">{t("subtitle")}</p>
+      </div>
+
+      {/* Stats strip */}
+      <div className="grid grid-cols-3 gap-4 mb-8 animate-in animate-in-delay-1">
+        <Card>
+          <div className="text-xs text-text-muted">{t("totalOpenBalance")}</div>
+          <div className="text-2xl font-semibold mt-1">
+            CHF {totalOpen.toFixed(2)}
+          </div>
+        </Card>
+        <Card>
+          <div className="text-xs text-text-muted">{t("orgsWithBalance")}</div>
+          <div className="text-2xl font-semibold mt-1">{balances.length}</div>
+        </Card>
+        <Card>
+          <div className="text-xs text-text-muted">{t("overdueInvoices")}</div>
+          <div className="text-2xl font-semibold mt-1">
+            {totalOverdue > 0 ? (
+              <span className="text-error">{totalOverdue}</span>
+            ) : (
+              totalOverdue
+            )}
+          </div>
+        </Card>
+      </div>
+
+      {/* Sub-tool cards */}
+      <div className="grid grid-cols-3 gap-4 mb-8 animate-in animate-in-delay-2">
+        <Link href="/admin/billing/pricing">
+          <Card interactive>
+            <div className="font-semibold mb-1">{t("pricingTitle")}</div>
+            <div className="text-sm text-text-muted">{t("pricingDesc")}</div>
+          </Card>
+        </Link>
+        <Link href="/admin/billing/generate">
+          <Card interactive>
+            <div className="font-semibold mb-1">{t("generateTitle")}</div>
+            <div className="text-sm text-text-muted">{t("generateDesc")}</div>
+          </Card>
+        </Link>
+        <Link href="/admin/billing/invoices">
+          <Card interactive>
+            <div className="font-semibold mb-1">{t("invoicesTitle")}</div>
+            <div className="text-sm text-text-muted">{t("invoicesDesc")}</div>
+          </Card>
+        </Link>
+      </div>
+
+      {/* Orgs with open balance */}
+      {balances.length > 0 && (
+        <div className="animate-in animate-in-delay-3">
+          <h2 className="text-lg font-semibold mb-3">{t("balancesTitle")}</h2>
+          <Card>
+            <table className="w-full text-sm">
+              <thead className="text-xs text-text-muted text-left">
+                <tr>
+                  <th className="pb-2">{t("orgIdCol")}</th>
+                  <th className="pb-2 text-right">{t("openCountCol")}</th>
+                  <th className="pb-2 text-right">{t("overdueCountCol")}</th>
+                  <th className="pb-2 text-right">{t("totalOpenCol")}</th>
+                </tr>
+              </thead>
+              <tbody>
+                {balances.map((b) => (
+                  <tr key={b.zitadelOrgId} className="border-t border-border">
+                    <td className="py-2 font-mono text-xs">{b.zitadelOrgId}</td>
+                    <td className="py-2 text-right">{b.openCount}</td>
+                    <td className="py-2 text-right">
+                      {b.overdueCount > 0 ? (
+                        <span className="text-error">{b.overdueCount}</span>
+                      ) : (
+                        <span className="text-text-muted">0</span>
+                      )}
+                    </td>
+                    <td className="py-2 text-right">
+                      CHF {b.totalOpenChf.toFixed(2)}
+                    </td>
+                  </tr>
+                ))}
+              </tbody>
+            </table>
+          </Card>
+        </div>
+      )}
+    </main>
+  );
+}