feat(v2): live sidebar counts, /dashboard = V2 default route, remove V1 dead code

frontend/src/router.ts

@@ -9,7 +9,6 @@ import AgentsIndexView from './views/AgentsIndexView.vue'
 import SecurityView from './views/SecurityView.vue'
 import IncidentsView from './views/IncidentsView.vue'
 import CalendarView from './views/CalendarView.vue'
-import DashboardView from './views/DashboardView.vue'
 import NexusLayout from './layouts/NexusLayout.vue'
 import FlowBoard from './views/Dashboard/FlowBoard.vue'
 
@@ -17,15 +16,12 @@ const routes = [
   { path: '/login', name: 'Login', component: LoginView, meta: { public: true } },
   { path: '/', redirect: '/dashboard' },
 
-  // V1 Dashboard (altes Layout – bleibt erhalten)
-  { path: '/dashboard', name: 'Dashboard', component: DashboardView },
-
-  // V2 Dashboard (neues NexusLayout)
+  // V2 Dashboard (neues NexusLayout + FlowBoard)
   {
-    path: '/dashboard/v2',
+    path: '/dashboard',
     component: NexusLayout,
     children: [
-      { path: '', name: 'DashboardV2', component: FlowBoard },
+      { path: '', name: 'Dashboard', component: FlowBoard },
     ],
   },