feat: node info, build info and acrylic web theme

Squash of recent dev work: return_session login, backend switcher, line
detail timeline, overview strips, node platform/country/ISP info with flags
and icons, build info (version, tag, time) behind site.show_build, and the
acrylic display theme.

web/admin/src/main.tsx

@@ -4,7 +4,7 @@ import { BrowserRouter } from 'react-router-dom'
 import '@shared/theme/base.css'
 import { configureSource } from '@shared/api/source'
 import { applyStoredTheme } from '@shared/hooks'
-import { ToastProvider } from '@shared/ui'
+import { ErrorBoundary, ToastProvider } from '@shared/ui'
 import { App } from './App'
 import { AuthProvider } from './auth'
 import './admin.css'
@@ -15,11 +15,13 @@ applyStoredTheme()
 createRoot(document.getElementById('root')!).render(
   <StrictMode>
     <BrowserRouter basename={import.meta.env.BASE_URL}>
-      <ToastProvider>
-        <AuthProvider>
-          <App />
-        </AuthProvider>
-      </ToastProvider>
+      <ErrorBoundary>
+        <ToastProvider>
+          <AuthProvider>
+            <App />
+          </AuthProvider>
+        </ToastProvider>
+      </ErrorBoundary>
     </BrowserRouter>
   </StrictMode>,
 )