feat(11-04): add client-side search bar to catalog page, remove ServiceForm

- New CatalogSearch client component: filters ServiceWithTags[] by name/tag, case-insensitive, instant (no reload)
- page.tsx now passes filtered services through CatalogSearch -> ServiceTable
- ServiceForm.tsx deleted — quick-add row in ServiceTable replaces its create-service UX

src/app/admin/catalog/page.tsx

@@ -1,6 +1,5 @@
 import { getAllServices } from "@/lib/admin-queries";
-import { ServiceTable } from "@/components/admin/catalog/ServiceTable";
-import { ServiceForm } from "@/components/admin/catalog/ServiceForm";
+import { CatalogSearch } from "./CatalogSearch";
 
 export const revalidate = 0;
 
@@ -13,16 +12,12 @@ export default async function CatalogPage() {
         <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.
+          Nessun servizio nel catalogo. Scrivi un nome nella riga in fondo alla tabella e premi invio per crearne uno.
         </p>
       ) : (
-        <ServiceTable services={services} />
+        <CatalogSearch services={services} />
       )}
     </div>
   );