chore(settings): Clean up unused imports and optimize polling

- Removed unused getPulsePort/getPulseWebSocketUrl imports
- Optimized polling to only run on proxmox tab (DiagnosticsPanel handles its own fetching)
- Remaining lint warnings are for legacy code that may need future refactoring

frontend-modern/src/components/Settings/Settings.tsx

@@ -13,7 +13,6 @@ import { useNavigate, useLocation } from '@solidjs/router';
 import { useWebSocket } from '@/App';
 import { showSuccess, showError, showWarning } from '@/utils/toast';
 import { copyToClipboard } from '@/utils/clipboard';
-import { getPulsePort, getPulseWebSocketUrl } from '@/utils/url';
 import { logger } from '@/utils/logger';
 import {
   apiFetch,
@@ -1103,7 +1102,7 @@ const Settings: Component<SettingsProps> = (props) => {
     if (typeof window === 'undefined') {
       return;
     }
-    const shouldPoll = currentTab() === 'proxmox' || currentTab() === 'diagnostics';
+    const shouldPoll = currentTab() === 'proxmox';
     if (!shouldPoll) {
       return;
     }