fix: move companion indicator into sidebar, inline design

Move CompanionIndicator from global App.vue overlay to DashboardSidebar
next to ControllerIndicator. Redesigned as inline sidebar element with
Tailwind classes — shows muted 'Relay' when idle, orange 'Companion'
with pulse dot when actively receiving input.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/views/dashboard/DashboardSidebar.vue

@@ -76,6 +76,7 @@
 
         <div class="sidebar-controller px-6 pb-2 shrink-0">
           <ControllerIndicator />
+          <CompanionIndicator />
         </div>
 
         <!-- Online status -->
@@ -106,6 +107,7 @@ import { useMeshStore } from '@/stores/mesh'
 import AnimatedLogo from '@/components/AnimatedLogo.vue'
 import OnlineStatusPill from '@/components/OnlineStatusPill.vue'
 import ControllerIndicator from '@/components/ControllerIndicator.vue'
+import CompanionIndicator from '@/components/CompanionIndicator.vue'
 import ModeSwitcher from '@/components/ModeSwitcher.vue'
 
 interface NavItem {