feat: wire dashboard v2 to backend data

frontend/src/components/layout/Topbar.vue

@@ -3,6 +3,7 @@ import { icons } from '../../composables/icons'
 
 defineProps<{
   connected?: boolean
+  statusLabel?: string
 }>()
 
 defineEmits<{
@@ -27,7 +28,7 @@ defineEmits<{
     <!-- Status Pill -->
     <span :class="['pill', connected ? 'live' : 'preview']">
       <span class="status-dot" :class="connected ? 'on' : 'off'"></span>
-      {{ connected ? 'OpenClaw verbunden' : 'Preview' }}
+      {{ connected ? (statusLabel || 'OpenClaw verbunden') : 'Preview' }}
     </span>
 
     <!-- Ask Iris Button -->