backend: require confirmation for signed channel updates [CI]

web/admin/src/App.tsx

@@ -4,6 +4,7 @@ import { NavLink, Navigate, Route, Routes } from 'react-router-dom'
 import { activateSource, getBase, listSources } from '@shared/api/source'
 import { describeError, Field, SourceButton, Spinner, ThemeToggle } from '@shared/ui'
 import { useAuth } from './auth'
+import { BackendUpdateNotice } from './BackendUpdateNotice'
 import { AgentDetail } from './pages/AgentDetail'
 import { Agents } from './pages/Agents'
 import { Probes } from './pages/Probes'
@@ -162,6 +163,7 @@ export function App() {
         </div>
       </aside>
       <div className="main">
+        <BackendUpdateNotice />
         <Routes>
           <Route path="/" element={<Navigate to="/agents" replace />} />
           <Route path="/agents" element={<Agents />} />