fix(app): ensure environment is set in initial AppState

The AppBloc was receiving the AppEnvironment in its constructor but was not setting it in the initial AppState. This resulted in `state.environment` being null throughout the app, causing conditional UI elements (like demo mode hints) to fail to appear.

This change passes the environment to the AppState constructor during bloc initialization and removes the now-unused `_environment` field from the AppBloc.

Author: fulleni

lib/app/bloc/app_bloc.dart

@@ -21,9 +21,8 @@ class AppBloc extends Bloc<AppEvent, AppState> {
   }) : _authenticationRepository = authenticationRepository,
        _userAppSettingsRepository = userAppSettingsRepository,
        _appConfigRepository = appConfigRepository,
-       _environment = environment,
        super(
-         const AppState(),
+         AppState(environment: environment),
        ) {
     on<AppUserChanged>(_onAppUserChanged);
     on<AppLogoutRequested>(_onLogoutRequested);
@@ -37,7 +36,6 @@ class AppBloc extends Bloc<AppEvent, AppState> {
   final HtAuthRepository _authenticationRepository;
   final HtDataRepository<UserAppSettings> _userAppSettingsRepository;
   final HtDataRepository<AppConfig> _appConfigRepository;
-  final local_config.AppEnvironment _environment;
   late final StreamSubscription<User?> _userSubscription;
 
   /// Handles user changes and loads initial settings once user is available.