fix(i18n): normalize translations and fallbacks

lib/servicios/servicio_alarmas_android.dart

@@ -1,8 +1,11 @@
 import 'dart:async';
+import 'dart:ui' show Locale;
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 
+import '../l10n/display_names.dart';
+import '../l10n/gen/app_localizations.dart';
 import '../modelos/alarma_musical.dart';
 
 class EventoAlarmaAndroid {
@@ -114,6 +117,17 @@ class ServicioAlarmasAndroid implements PuertoAlarmasAndroid {
   static final _eventosController =
       StreamController<EventoAlarmaAndroid>.broadcast();
   static bool _handlerInstalado = false;
+  static AppLocalizations? _l10n;
+
+  static AppLocalizations get _textos {
+    final actual = _l10n;
+    if (actual != null) return actual;
+    return lookupAppLocalizations(const Locale('es'));
+  }
+
+  static void configurarLocalizaciones(AppLocalizations l10n) {
+    _l10n = l10n;
+  }
 
   @override
   Stream<EventoAlarmaAndroid> get eventosAlarma => _eventosController.stream;
@@ -133,7 +147,7 @@ class ServicioAlarmasAndroid implements PuertoAlarmasAndroid {
     );
     final programada = await _channel.invokeMethod<bool>('scheduleAlarm', {
       'id': alarma.id,
-      'title': alarma.nombre,
+      'title': localizedAlarmName(_textos, alarma.nombre),
       'triggerAtMillis': proxima.millisecondsSinceEpoch,
       'preNoticeAtMillis':
           alarma.snoozeHasta == null
@@ -150,15 +164,16 @@ class ServicioAlarmasAndroid implements PuertoAlarmasAndroid {
       'lastHandledAtMillis':
           alarma.ultimaEjecucionGestionada?.millisecondsSinceEpoch,
       'soundOnVacation': alarma.sonarEnVacaciones,
-      'stationName': alarma.emisora?.nombre,
+      'stationName':
+          alarma.emisora == null
+              ? null
+              : localizedStationName(_textos, alarma.emisora!.nombre),
       'stationUrl': alarma.emisora?.url,
       'fallbackSound': alarma.sonidoInterno.name,
       'volume': alarma.volumen,
     });
     if (programada != true) {
-      throw StateError(
-        'Android no pudo programar una alarma exacta. Revisa el permiso de alarmas exactas.',
-      );
+      throw StateError(_textos.androidExactAlarmScheduleError);
     }
   }