feat(governance): Integrate ReportButton across UI

- Add ReportButton to CityRoomView header
- Add ReportButton to AgentCabinet header
- Add GOVERNANCE link to main Navigation
- Import Shield icon from lucide-react

src/components/layout/Navigation.tsx

@@ -1,5 +1,5 @@
 import { Link, useLocation } from 'react-router-dom';
-import { Home, Settings, Zap, Network, Activity, Users, MessageSquare, Globe, Plus } from 'lucide-react';
+import { Home, Settings, Zap, Network, Activity, Users, MessageSquare, Globe, Plus, Shield } from 'lucide-react';
 
 export function Navigation() {
   const location = useLocation();
@@ -8,6 +8,7 @@ export function Navigation() {
     { path: '/', label: 'Головна', icon: Home },
     { path: '/console', label: 'Console', icon: Settings },
     { path: '/nodes', label: 'НОДИ', icon: Network },
+    { path: '/governance', label: 'GOVERNANCE', icon: Shield },
     { path: '/space', label: 'КОСМОС', icon: Zap },
     { path: '/network', label: 'МЕРЕЖА', icon: Globe },
     { path: '/connect-node', label: 'ПІДКЛЮЧИТИ', icon: Plus },