Global refresh rate in Settings drives every live view and each machine's sampler; per-page pickers removed

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

web/src/App.tsx

@@ -3,6 +3,7 @@ import { api, Me, Unauthenticated } from './api'
 import Login from './Login'
 import Shell from './Shell'
 import { applyTheme, currentThemeId } from './themes'
+import { getRefreshMs, setRefreshMs } from './prefs'
 
 export default function App() {
   const [me, setMe] = useState<Me | null | undefined>(undefined)
@@ -10,7 +11,10 @@ export default function App() {
   const refresh = useCallback(async () => {
     try {
       const m = await api.meHere(); setMe(m)
-      api.uiPrefs().then((p) => { if (p.theme && p.theme !== currentThemeId()) applyTheme(p.theme) }).catch(() => { /* keep local */ })
+      api.uiPrefs().then((p) => {
+        if (p.theme && p.theme !== currentThemeId()) applyTheme(p.theme)
+        if (p.refreshMs && p.refreshMs !== getRefreshMs()) setRefreshMs(p.refreshMs)
+      }).catch(() => { /* keep local */ })
     } catch (e) { if (e instanceof Unauthenticated) setMe(null) }
   }, [])