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/[id]/page.tsx

@@ -1,10 +1,17 @@
 import { notFound } from "next/navigation";
-import { getLeadById, getActivityLog, getUpcomingReminders } from "@/lib/lead-service";
+import { getActivityLog, getUpcomingReminders } from "@/lib/lead-service";
+import { getLeadsWithTags, getLeadFieldOptions } from "@/lib/admin-queries";
 import { LeadDetail } from "@/components/admin/leads/LeadDetail";
 
 export default async function LeadDetailPage({ params }: { params: Promise<{ id: string }> }) {
   const { id } = await params;
-  const lead = await getLeadById(id);
+
+  const [leads, options] = await Promise.all([
+    getLeadsWithTags(),
+    getLeadFieldOptions(),
+  ]);
+
+  const lead = leads.find((l) => l.id === id);
 
   if (!lead) {
     notFound();
@@ -13,5 +20,13 @@ export default async function LeadDetailPage({ params }: { params: Promise<{ id:
   const activities = await getActivityLog(id);
   const reminders = await getUpcomingReminders(id);
 
-  return <LeadDetail lead={lead} activities={activities} reminders={reminders} />;
+  return (
+    <LeadDetail
+      lead={lead}
+      activities={activities}
+      reminders={reminders}
+      tags={lead.tags}
+      tagOptions={options.tags}
+    />
+  );
 }