feat(phase-23): add Threat Actor profiles with MITRE CTI import, API, heatmap and gap analysis (T-208 to T-212)

frontend/src/components/Sidebar.tsx

@@ -13,6 +13,7 @@ import {
   ListChecks,
   ClipboardList,
   Database,
+  Crosshair,
 } from "lucide-react";
 import { useAuth } from "../context/AuthContext";
 
@@ -37,6 +38,7 @@ const mainLinks: NavItem[] = [
     ],
   },
   { to: "/reports", label: "Reports", icon: BarChart3 },
+  { to: "/threat-actors", label: "Threat Actors", icon: Crosshair },
 ];
 
 const adminLinks: NavItem[] = [