feat(19-01): add LeadsViewToggle with integrated search + list/kanban pill toggle

- LeadsViewToggle: client wrapper with useState<list|kanban>, useMemo filtered
- Search input (left) + pill toggle Lista/Kanban (right) on single row
- Filters leads by name/email/company/status/tags across both views
- Search state preserved when switching between Lista and Kanban
- LeadsSearch.tsx: replaced with re-export of LeadsViewToggle (backward compat)

src/app/admin/leads/LeadsSearch.tsx

@@ -1,46 +1,3 @@
-"use client";
+// LeadsSearch is superseded by LeadsViewToggle (Phase 19).
-
+// Re-exported here to avoid breaking any existing import.
-import { useState, useMemo } from "react";
+export { LeadsViewToggle as LeadsSearch } from "@/components/admin/leads/LeadsViewToggle";
-import { Input } from "@/components/ui/input";
-import { Search } from "lucide-react";
-import { LeadTable } from "@/components/admin/leads/LeadTable";
-import type { LeadWithTags, LeadFieldOptions } from "@/lib/admin-queries";
-
-export function LeadsSearch({
-  leads,
-  options,
-}: {
-  leads: LeadWithTags[];
-  options: LeadFieldOptions;
-}) {
-  const [query, setQuery] = useState("");
-
-  const filtered = useMemo(() => {
-    const q = query.trim().toLowerCase();
-    if (!q) return leads;
-    return leads.filter((l) => {
-      if (l.name.toLowerCase().includes(q)) return true;
-      if (l.email?.toLowerCase().includes(q)) return true;
-      if (l.company?.toLowerCase().includes(q)) return true;
-      if (l.status.toLowerCase().includes(q)) return true;
-      if (l.tags.some((t) => t.toLowerCase().includes(q))) return true;
-      return false;
-    });
-  }, [leads, query]);
-
-  return (
-    <div className="space-y-4">
-      <div className="relative max-w-sm">
-        <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-[#71717a]" />
-        <Input
-          type="text"
-          placeholder="Cerca lead..."
-          value={query}
-          onChange={(e) => setQuery(e.target.value)}
-          className="pl-9 h-9"
-        />
-      </div>
-      <LeadTable leads={filtered} options={options} />
-    </div>
-  );
-}

src/components/admin/leads/LeadsViewToggle.tsx

@@ -0,0 +1,77 @@
+"use client";
+
+import { useState, useMemo } from "react";
+import { Input } from "@/components/ui/input";
+import { Search } from "lucide-react";
+import { LeadTable } from "@/components/admin/leads/LeadTable";
+import { LeadsKanbanBoard } from "@/components/admin/leads/LeadsKanbanBoard";
+import type { LeadWithTags, LeadFieldOptions } from "@/lib/admin-queries";
+
+export function LeadsViewToggle({
+  leads,
+  options,
+}: {
+  leads: LeadWithTags[];
+  options: LeadFieldOptions;
+}) {
+  const [view, setView] = useState<"list" | "kanban">("list");
+  const [query, setQuery] = useState("");
+
+  const filtered = useMemo(() => {
+    const q = query.trim().toLowerCase();
+    if (!q) return leads;
+    return leads.filter((l) => {
+      if (l.name.toLowerCase().includes(q)) return true;
+      if (l.email?.toLowerCase().includes(q)) return true;
+      if (l.company?.toLowerCase().includes(q)) return true;
+      if (l.status.toLowerCase().includes(q)) return true;
+      if (l.tags.some((t) => t.toLowerCase().includes(q))) return true;
+      return false;
+    });
+  }, [leads, query]);
+
+  return (
+    <div className="space-y-4">
+      <div className="flex items-center justify-between gap-4">
+        <div className="relative max-w-sm flex-1">
+          <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-[#71717a]" />
+          <Input
+            type="text"
+            placeholder="Cerca lead..."
+            value={query}
+            onChange={(e) => setQuery(e.target.value)}
+            className="pl-9 h-9"
+          />
+        </div>
+        <div className="flex items-center gap-1 bg-[#f4f4f5] rounded-lg p-1 w-fit flex-shrink-0">
+          <button
+            onClick={() => setView("list")}
+            className={`px-3 py-1.5 rounded-md text-xs font-semibold transition-all ${
+              view === "list"
+                ? "bg-white text-[#1A463C] shadow-sm"
+                : "text-[#71717a] hover:text-[#1a1a1a]"
+            }`}
+          >
+            Lista
+          </button>
+          <button
+            onClick={() => setView("kanban")}
+            className={`px-3 py-1.5 rounded-md text-xs font-semibold transition-all ${
+              view === "kanban"
+                ? "bg-white text-[#1A463C] shadow-sm"
+                : "text-[#71717a] hover:text-[#1a1a1a]"
+            }`}
+          >
+            Kanban
+          </button>
+        </div>
+      </div>
+
+      {view === "list" ? (
+        <LeadTable leads={filtered} options={options} />
+      ) : (
+        <LeadsKanbanBoard leads={filtered} />
+      )}
+    </div>
+  );
+}