feat(03-02): catalog page + ServiceTable + ServiceForm + NavBar link

- Create src/app/admin/catalog/page.tsx: server component, fetches all services, renders ServiceForm + ServiceTable
- Create src/components/admin/catalog/ServiceForm.tsx: add-new-service form with open/collapse toggle
- Create src/components/admin/catalog/ServiceTable.tsx: per-row inline edit (DocumentRow pattern), Attivo/Disattivato badges, opacity-50 for inactive
- Modify src/components/admin/NavBar.tsx: add Catalogo link after Statistiche
- TypeScript clean, npm run build compiled successfully

src/app/admin/catalog/page.tsx

@@ -0,0 +1,29 @@
+import { getAllServices } from "@/lib/admin-queries";
+import { ServiceTable } from "@/components/admin/catalog/ServiceTable";
+import { ServiceForm } from "@/components/admin/catalog/ServiceForm";
+
+export const revalidate = 0;
+
+export default async function CatalogPage() {
+  const services = await getAllServices();
+
+  return (
+    <div>
+      <div className="flex items-center justify-between mb-6">
+        <h1 className="text-2xl font-bold text-[#1a1a1a]">Catalogo Servizi</h1>
+      </div>
+
+      <div className="mb-6">
+        <ServiceForm />
+      </div>
+
+      {services.length === 0 ? (
+        <p className="text-sm text-[#71717a]">
+          Nessun servizio nel catalogo. Aggiungi il primo servizio qui sopra.
+        </p>
+      ) : (
+        <ServiceTable services={services} />
+      )}
+    </div>
+  );
+}