fix: firstClient null check race

lib/main.dart

@@ -513,7 +513,7 @@ class _SetupScreenState extends State<SetupScreen> {
 
       if (!mounted) return;
 
-      if (result.hasConnections) {
+      if (result.hasConnections && result.firstClient != null) {
         // Resume any downloads that were interrupted by app kill
         final downloadProvider = context.read<DownloadProvider>();
         downloadProvider.ensureInitialized().then((_) {

lib/screens/auth_screen.dart

@@ -100,7 +100,7 @@ class _AuthScreenState extends State<AuthScreen> {
         clientIdentifier: _authService.clientIdentifier,
       );
 
-      if (!result.hasConnections) {
+      if (!result.hasConnections || result.firstClient == null) {
         if (!mounted) return;
         setState(() {
           _isAuthenticating = false;

lib/services/data_aggregation_service.dart

@@ -150,7 +150,6 @@ class DataAggregationService {
         return hubs;
       } catch (e, stackTrace) {
         appLogger.e('Failed to fetch hubs from server $serverId', error: e, stackTrace: stackTrace);
-        _serverManager.updateServerStatus(serverId, false);
         return <PlexHub>[];
       }
     });
@@ -229,7 +228,6 @@ class DataAggregationService {
         return serverHubs;
       } catch (e, stackTrace) {
         appLogger.e('Failed to fetch hubs from server $serverId', error: e, stackTrace: stackTrace);
-        _serverManager.updateServerStatus(serverId, false);
         return <PlexHub>[];
       }
     });
@@ -278,7 +276,6 @@ class DataAggregationService {
       return await client.getLibraries();
     } catch (e, stackTrace) {
       appLogger.e('Failed to fetch libraries for server $serverId', error: e, stackTrace: stackTrace);
-      _serverManager.updateServerStatus(serverId, false);
       return [];
     }
   }
@@ -436,7 +433,6 @@ class DataAggregationService {
         return (serverId, result);
       } catch (e, stackTrace) {
         appLogger.e('Failed $operationName from server $serverId', error: e, stackTrace: stackTrace);
-        _serverManager.updateServerStatus(serverId, false);
         appLogger.d('$operationName for server $serverId failed after ${sw.elapsedMilliseconds}ms');
         return (serverId, <T>[]);
       }