feat(14-02): add LeadsSearch, rewire leads pages, surface tags in LeadDetail (CRM-08/09)

- New LeadsSearch.tsx: client-side instant filter across name/email/
  company/status/tags (mirrors CatalogSearch.tsx)
- page.tsx: fetch via getLeadsWithTags()/getLeadFieldOptions(), render
  LeadsSearch + CreateLeadModal, revalidate=0
- [id]/page.tsx: fetch getLeadsWithTags()/getLeadFieldOptions(), find
  lead by id, pass tags/tagOptions to LeadDetail
- LeadDetail.tsx: add OptionMultiSelect for lead tags in the "Profilo"
  card, wired to addLeadTag/removeLeadTag/renameLeadTag with error display

src/app/admin/leads/page.tsx

@@ -1,25 +1,23 @@
-import { Suspense } from "react";
-import { getAllLeads } from "@/lib/lead-service";
-import { LeadTable } from "@/components/admin/leads/LeadTable";
+import { getLeadsWithTags, getLeadFieldOptions } from "@/lib/admin-queries";
+import { LeadsSearch } from "./LeadsSearch";
 import { CreateLeadModal } from "@/components/admin/leads/LeadForm";
 
-async function LeadsList() {
-  const leads = await getAllLeads();
+export const revalidate = 0;
+
+export default async function LeadsPage() {
+  const [leads, options] = await Promise.all([
+    getLeadsWithTags(),
+    getLeadFieldOptions(),
+  ]);
 
   return (
     <div className="space-y-6">
       <div className="flex justify-between items-center">
-        <h1 className="text-3xl font-bold">Lead Pipeline</h1>
+        <h1 className="text-2xl font-bold text-[#1a1a1a]">Lead Pipeline</h1>
         <CreateLeadModal />
       </div>
 
-      <Suspense fallback={<div className="animate-pulse">Loading...</div>}>
-        <LeadTable leads={leads} />
-      </Suspense>
+      <LeadsSearch leads={leads} options={options} />
     </div>
   );
 }
-
-export default function LeadsPage() {
-  return <LeadsList />;
-}