feat: AI Team Network ins Dashboard integriert, Vollbreite, dynamisches Grid

- TeamNetwork ins Dashboard verschoben (center column)
- 3-Spalten-Layout auf volle Desktop-Breite (kein max-width)
- Agent-Grid dynamisch: 2 Spalten, erweitert nach unten (4→6→8 Agenten)
- SVG-Bézier-Linien mit ResizeObserver passen sich an
- 'Team' aus Navigation, Router und standaloneViews entfernt
- /team Route gelöscht

frontend/src/App.vue

@@ -20,7 +20,7 @@ const activeView = computed(() => {
 })
 
 const routePaths: Record<string, string> = {
-  Dashboard: '/dashboard', Memory: '/memory', Docs: '/docs', Team: '/team', Security: '/security',
+  Dashboard: '/dashboard', Memory: '/memory', Docs: '/docs', Security: '/security',
   Projects: '/projects', 'Task Board': '/tasks', Incidents: '/incidents', Calendar: '/calendar',
   Agents: '/agents', Models: '/models', Activity: '/activity', 'Mobile Chat': '/chat', Settings: '/settings',
 }
@@ -31,7 +31,7 @@ const navigate = (label: string) => {
 }
 const mobileNavOpen = ref(false)
 
-const standaloneViews = computed(() => ['Dashboard', 'Settings', 'ProjectDetail', 'Memory', 'Docs', 'Team', 'Security', 'Incidents', 'Calendar', 'AgentDetail', 'Agents'].includes(activeView.value))
+const standaloneViews = computed(() => ['Dashboard', 'Settings', 'ProjectDetail', 'Memory', 'Docs', 'Security', 'Incidents', 'Calendar', 'AgentDetail', 'Agents'].includes(activeView.value))
 
 onMounted(() => {
   if (auth.isAuthenticated) store.refresh()