perf: reduce relay status polling interval to 20 seconds

Change relay status polling from 5s (default) and 2s (Settings/Indicator) to 20s across the board to reduce CPU usage and network requests

src/components/Bookmarks.tsx

@@ -53,7 +53,7 @@ const Bookmarks: React.FC<BookmarksProps> = ({ relayPool, onLogout }) => {
   })
 
   // Monitor relay status for offline sync
-  const relayStatuses = useRelayStatus({ relayPool, pollingInterval: 5000 })
+  const relayStatuses = useRelayStatus({ relayPool })
 
   // Automatically sync local events to remote relays when coming back online
   useOfflineSync({

src/components/RelayStatusIndicator.tsx

@@ -10,8 +10,8 @@ interface RelayStatusIndicatorProps {
 }
 
 export const RelayStatusIndicator: React.FC<RelayStatusIndicatorProps> = ({ relayPool }) => {
-  // Poll frequently for responsive local-only detection
-  const relayStatuses = useRelayStatus({ relayPool, pollingInterval: 2000 })
+  // Poll for relay status updates
+  const relayStatuses = useRelayStatus({ relayPool })
   
   if (!relayPool) return null
   

src/components/Settings.tsx

@@ -60,8 +60,8 @@ const Settings: React.FC<SettingsProps> = ({ settings, onSave, onClose, relayPoo
   const saveTimeoutRef = useRef<number | null>(null)
   const isLocallyUpdating = useRef(false)
   
-  // Poll more frequently in settings for responsive status updates
-  const relayStatuses = useRelayStatus({ relayPool, pollingInterval: 2000 })
+  // Poll for relay status updates
+  const relayStatuses = useRelayStatus({ relayPool })
 
   useEffect(() => {
     // Don't update from external settings if we're currently making local changes

src/hooks/useRelayStatus.ts

@@ -9,7 +9,7 @@ interface UseRelayStatusParams {
 
 export function useRelayStatus({ 
   relayPool, 
-  pollingInterval = 5000 
+  pollingInterval = 20000 
 }: UseRelayStatusParams) {
   const [relayStatuses, setRelayStatuses] = useState<RelayStatus[]>([])