feat(phase-28): add scoring system, operational metrics and executive dashboard (T-224 to T-226)

frontend/src/components/Sidebar.tsx

@@ -16,6 +16,7 @@ import {
   Crosshair,
   Zap,
   Grid3X3,
+  Gauge,
 } from "lucide-react";
 import { useAuth } from "../context/AuthContext";
 
@@ -40,6 +41,7 @@ const mainLinks: NavItem[] = [
       { to: "/test-catalog", label: "Test Catalog", icon: BookOpen },
     ],
   },
+  { to: "/executive-dashboard", label: "Executive Dashboard", icon: Gauge },
   { to: "/reports", label: "Reports", icon: BarChart3 },
   { to: "/threat-actors", label: "Threat Actors", icon: Crosshair },
   { to: "/campaigns", label: "Campaigns", icon: Zap },