feat(alarm): add musical alarm foundation

android/app/src/main/AndroidManifest.xml

@@ -5,6 +5,9 @@
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK"/>
     <uses-permission android:name="android.permission.WAKE_LOCK"/>
     <uses-permission android:name="android.permission.RECORD_AUDIO"/>
+    <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM"/>
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
 
@@ -52,6 +55,16 @@
             </intent-filter>
         </receiver>
 
+        <receiver
+            android:name=".PluriWaveAlarmReceiver"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="es.freetimelab.pluriwave.alarm.FIRE"/>
+                <action android:name="es.freetimelab.pluriwave.alarm.PRE_NOTICE"/>
+                <action android:name="es.freetimelab.pluriwave.alarm.SKIP_NEXT"/>
+            </intent-filter>
+        </receiver>
+
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />

android/app/src/main/kotlin/es/freetimelab/pluriwave/AlarmScheduler.kt

@@ -0,0 +1,77 @@
+package es.freetimelab.pluriwave
+
+import android.app.AlarmManager
+import android.app.PendingIntent
+import android.content.Context
+import android.content.Intent
+import android.os.Build
+
+class AlarmScheduler(private val context: Context) {
+    private val alarmManager =
+        context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
+
+    fun scheduleAlarm(id: String, title: String, triggerAtMillis: Long, preNoticeAtMillis: Long) {
+        val alarmIntent = PendingIntent.getBroadcast(
+            context,
+            requestCode(id, 1),
+            Intent(context, PluriWaveAlarmReceiver::class.java).apply {
+                action = PluriWaveAlarmReceiver.ACTION_FIRE
+                putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_ID, id)
+                putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_TITLE, title)
+            },
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+
+        val showIntent = PendingIntent.getActivity(
+            context,
+            requestCode(id, 2),
+            Intent(context, MainActivity::class.java).apply {
+                flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
+                putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_ID, id)
+            },
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+
+        alarmManager.setAlarmClock(
+            AlarmManager.AlarmClockInfo(triggerAtMillis, showIntent),
+            alarmIntent
+        )
+
+        if (preNoticeAtMillis > System.currentTimeMillis()) {
+            alarmManager.setExactAndAllowWhileIdle(
+                AlarmManager.RTC_WAKEUP,
+                preNoticeAtMillis,
+                PendingIntent.getBroadcast(
+                    context,
+                    requestCode(id, 3),
+                    Intent(context, PluriWaveAlarmReceiver::class.java).apply {
+                        action = PluriWaveAlarmReceiver.ACTION_PRE_NOTICE
+                        putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_ID, id)
+                        putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_TITLE, title)
+                    },
+                    PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+                )
+            )
+        }
+    }
+
+    fun cancelAlarm(id: String) {
+        for (slot in 1..3) {
+            alarmManager.cancel(
+                PendingIntent.getBroadcast(
+                    context,
+                    requestCode(id, slot),
+                    Intent(context, PluriWaveAlarmReceiver::class.java),
+                    PendingIntent.FLAG_NO_CREATE or PendingIntent.FLAG_IMMUTABLE
+                ) ?: continue
+            )
+        }
+    }
+
+    fun canScheduleExactAlarms(): Boolean {
+        return Build.VERSION.SDK_INT < Build.VERSION_CODES.S ||
+            alarmManager.canScheduleExactAlarms()
+    }
+
+    private fun requestCode(id: String, slot: Int): Int = 31 * id.hashCode() + slot
+}

android/app/src/main/kotlin/es/freetimelab/pluriwave/MainActivity.kt

@@ -9,9 +9,11 @@ import android.os.Looper
 import com.ryanheise.audioservice.AudioServiceActivity
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.EventChannel
+import io.flutter.plugin.common.MethodChannel
 
 class MainActivity : AudioServiceActivity() {
     private val visualizerChannel = "pluriwave/audio_visualizer"
+    private val alarmChannel = "pluriwave/alarm_scheduler"
     private val permissionRequestCode = 4821
     private var visualizer: Visualizer? = null
     private var pendingSink: EventChannel.EventSink? = null
@@ -36,6 +38,47 @@ class MainActivity : AudioServiceActivity() {
                 pendingArgs = null
             }
         })
+
+        val alarmScheduler = AlarmScheduler(this)
+        MethodChannel(
+            flutterEngine.dartExecutor.binaryMessenger,
+            alarmChannel
+        ).setMethodCallHandler { call, result ->
+            when (call.method) {
+                "scheduleAlarm" -> {
+                    val id = call.argument<String>("id")
+                    val title = call.argument<String>("title") ?: "PluriWave"
+                    val triggerAtMillis = call.argument<Long>("triggerAtMillis")
+                    val preNoticeAtMillis = call.argument<Long>("preNoticeAtMillis") ?: 0L
+                    if (id == null || triggerAtMillis == null) {
+                        result.error("INVALID_ALARM", "Missing alarm id or trigger time", null)
+                    } else {
+                        alarmScheduler.scheduleAlarm(id, title, triggerAtMillis, preNoticeAtMillis)
+                        result.success(null)
+                    }
+                }
+                "cancelAlarm" -> {
+                    val id = call.argument<String>("id")
+                    if (id == null) {
+                        result.error("INVALID_ALARM", "Missing alarm id", null)
+                    } else {
+                        alarmScheduler.cancelAlarm(id)
+                        result.success(null)
+                    }
+                }
+                "diagnostics" -> {
+                    result.success(
+                        mapOf(
+                            "canScheduleExactAlarms" to alarmScheduler.canScheduleExactAlarms(),
+                            "notificationsEnabled" to true,
+                            "manufacturer" to Build.MANUFACTURER,
+                            "sdkInt" to Build.VERSION.SDK_INT
+                        )
+                    )
+                }
+                else -> result.notImplemented()
+            }
+        }
     }
 
     private fun startVisualizerWhenAllowed() {

android/app/src/main/kotlin/es/freetimelab/pluriwave/PluriWaveAlarmReceiver.kt

@@ -0,0 +1,40 @@
+package es.freetimelab.pluriwave
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+
+class PluriWaveAlarmReceiver : BroadcastReceiver() {
+    override fun onReceive(context: Context, intent: Intent) {
+        val alarmId = intent.getStringExtra(EXTRA_ALARM_ID) ?: return
+        val title = intent.getStringExtra(EXTRA_ALARM_TITLE) ?: "PluriWave"
+
+        when (intent.action) {
+            ACTION_FIRE -> {
+                val launch = Intent(context, MainActivity::class.java).apply {
+                    flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
+                    putExtra(EXTRA_ALARM_ID, alarmId)
+                    putExtra(EXTRA_ALARM_TITLE, title)
+                    putExtra(EXTRA_ALARM_ACTION, ACTION_FIRE)
+                }
+                context.startActivity(launch)
+            }
+            ACTION_PRE_NOTICE -> {
+                // MVP: native delivery exists; Flutter will own skip-next UX.
+                // Next batch: notification channel + action button.
+            }
+            ACTION_SKIP_NEXT -> {
+                // Next batch: forward skip-next to Flutter persistence or native store.
+            }
+        }
+    }
+
+    companion object {
+        const val ACTION_FIRE = "es.freetimelab.pluriwave.alarm.FIRE"
+        const val ACTION_PRE_NOTICE = "es.freetimelab.pluriwave.alarm.PRE_NOTICE"
+        const val ACTION_SKIP_NEXT = "es.freetimelab.pluriwave.alarm.SKIP_NEXT"
+        const val EXTRA_ALARM_ID = "alarmId"
+        const val EXTRA_ALARM_TITLE = "alarmTitle"
+        const val EXTRA_ALARM_ACTION = "alarmAction"
+    }
+}

lib/app.dart

@@ -2,6 +2,8 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import 'estado/estado_radio.dart';
+import 'estado/estado_alarmas.dart';
+import 'pantallas/pantalla_alarmas.dart';
 import 'pantallas/pantalla_inicio.dart';
 import 'pantallas/pantalla_buscar.dart';
 import 'pantallas/pantalla_favoritos.dart';
@@ -17,8 +19,11 @@ class PluriWaveApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return ChangeNotifierProvider(
-      create: (_) => EstadoRadio(),
+    return MultiProvider(
+      providers: [
+        ChangeNotifierProvider(create: (_) => EstadoRadio()),
+        ChangeNotifierProvider(create: (_) => EstadoAlarmas()),
+      ],
       child: MaterialApp(
         title: 'PluriWave',
         debugShowCheckedModeBanner: false,
@@ -47,6 +52,7 @@ class _PaginaPrincipalState extends State<_PaginaPrincipal> {
     PantallaInicio(),
     PantallaBuscar(),
     PantallaFavoritos(),
+    PantallaAlarmas(),
     PantallaAjustes(),
   ];
 
@@ -75,6 +81,14 @@ class _PaginaPrincipalState extends State<_PaginaPrincipal> {
       ),
       label: 'Favoritos',
     ),
+    NavigationDestination(
+      icon: PluriIcon(glyph: PluriIconGlyph.alarm),
+      selectedIcon: PluriIcon(
+        glyph: PluriIconGlyph.alarm,
+        variant: PluriIconVariant.activeGlow,
+      ),
+      label: 'Alarmas',
+    ),
     NavigationDestination(
       icon: PluriIcon(glyph: PluriIconGlyph.settings),
       selectedIcon: PluriIcon(

lib/estado/estado_alarmas.dart

@@ -0,0 +1,118 @@
+import 'package:flutter/foundation.dart';
+
+import '../modelos/alarma_musical.dart';
+import '../servicios/servicio_alarmas.dart';
+import '../servicios/servicio_alarmas_android.dart';
+
+class EstadoAlarmas extends ChangeNotifier {
+  EstadoAlarmas({
+    ServicioAlarmas? servicio,
+    ServicioAlarmasAndroid? android,
+    bool iniciarAutomaticamente = true,
+  }) : servicio = servicio ?? ServicioAlarmas(),
+       android = android ?? ServicioAlarmasAndroid() {
+    if (iniciarAutomaticamente) {
+      inicializar();
+    }
+  }
+
+  final ServicioAlarmas servicio;
+  final ServicioAlarmasAndroid android;
+
+  List<AlarmaMusical> _alarmas = [];
+  List<RangoVacaciones> _vacaciones = [];
+  DiagnosticoAlarmasAndroid? _diagnostico;
+  bool _cargando = false;
+  String? _error;
+
+  List<AlarmaMusical> get alarmas => List.unmodifiable(_alarmas);
+  List<RangoVacaciones> get vacaciones => List.unmodifiable(_vacaciones);
+  DiagnosticoAlarmasAndroid? get diagnostico => _diagnostico;
+  bool get cargando => _cargando;
+  String? get error => _error;
+
+  AlarmaMusical? get proximaAlarma {
+    final candidatas =
+        _alarmas.where((a) => a.activa && a.proximaEjecucion != null).toList()
+          ..sort((a, b) => a.proximaEjecucion!.compareTo(b.proximaEjecucion!));
+    return candidatas.isEmpty ? null : candidatas.first;
+  }
+
+  Future<void> inicializar() async {
+    _cargando = true;
+    _error = null;
+    notifyListeners();
+    try {
+      final config = await servicio.cargar();
+      _aplicar(config);
+      await _sincronizarTodas();
+      await cargarDiagnostico();
+    } catch (e) {
+      _error = 'No se pudieron cargar las alarmas: $e';
+    } finally {
+      _cargando = false;
+      notifyListeners();
+    }
+  }
+
+  Future<void> guardarAlarma(AlarmaMusical alarma) async {
+    final config = await servicio.guardarAlarma(alarma);
+    _aplicar(config);
+    await android.programar(_alarmas.firstWhere((a) => a.id == alarma.id));
+    notifyListeners();
+  }
+
+  Future<void> eliminarAlarma(String id) async {
+    final config = await servicio.eliminarAlarma(id);
+    _aplicar(config);
+    await android.cancelar(id);
+    notifyListeners();
+  }
+
+  Future<void> cambiarActiva(AlarmaMusical alarma, bool activa) async {
+    await guardarAlarma(alarma.copyWith(activa: activa));
+  }
+
+  Future<void> saltarProxima(String alarmaId) async {
+    final config = await servicio.saltarProxima(alarmaId);
+    _aplicar(config);
+    AlarmaMusical? alarma;
+    for (final item in _alarmas) {
+      if (item.id == alarmaId) {
+        alarma = item;
+        break;
+      }
+    }
+    if (alarma != null) {
+      await android.programar(alarma);
+    }
+    notifyListeners();
+  }
+
+  Future<void> guardarVacaciones(List<RangoVacaciones> vacaciones) async {
+    final config = await servicio.guardarVacaciones(vacaciones);
+    _aplicar(config);
+    await _sincronizarTodas();
+    notifyListeners();
+  }
+
+  Future<void> cargarDiagnostico() async {
+    try {
+      _diagnostico = await android.diagnostico();
+    } catch (_) {
+      _diagnostico = null;
+    }
+    notifyListeners();
+  }
+
+  Future<void> _sincronizarTodas() async {
+    for (final alarma in _alarmas) {
+      await android.programar(alarma);
+    }
+  }
+
+  void _aplicar(ConfiguracionAlarmas config) {
+    _alarmas = config.alarmas;
+    _vacaciones = config.vacaciones;
+  }
+}

lib/modelos/alarma_musical.dart

@@ -0,0 +1,219 @@
+import 'emisora.dart';
+
+enum TipoProgramacionAlarma { unica, diaria, diasSemana }
+
+enum SonidoInternoAlarma { amanecer, campanaSuave, pulsoDigital }
+
+class AlarmaMusical {
+  const AlarmaMusical({
+    required this.id,
+    required this.nombre,
+    required this.hora,
+    required this.minuto,
+    required this.tipoProgramacion,
+    required this.diasSemana,
+    this.emisora,
+    this.emisoraFallback,
+    this.activa = true,
+    this.sonarEnVacaciones = true,
+    this.snoozeMinutos = 5,
+    this.volumen = 0.85,
+    this.sonidoInterno = SonidoInternoAlarma.amanecer,
+    this.proximaEjecucion,
+    this.creadaEn,
+    this.actualizadaEn,
+  });
+
+  final String id;
+  final String nombre;
+  final bool activa;
+  final int hora;
+  final int minuto;
+  final TipoProgramacionAlarma tipoProgramacion;
+  final List<int> diasSemana;
+  final Emisora? emisora;
+  final Emisora? emisoraFallback;
+  final bool sonarEnVacaciones;
+  final int snoozeMinutos;
+  final double volumen;
+  final SonidoInternoAlarma sonidoInterno;
+  final DateTime? proximaEjecucion;
+  final DateTime? creadaEn;
+  final DateTime? actualizadaEn;
+
+  AlarmaMusical copyWith({
+    String? id,
+    String? nombre,
+    bool? activa,
+    int? hora,
+    int? minuto,
+    TipoProgramacionAlarma? tipoProgramacion,
+    List<int>? diasSemana,
+    Emisora? emisora,
+    Emisora? emisoraFallback,
+    bool? sonarEnVacaciones,
+    int? snoozeMinutos,
+    double? volumen,
+    SonidoInternoAlarma? sonidoInterno,
+    DateTime? proximaEjecucion,
+    DateTime? creadaEn,
+    DateTime? actualizadaEn,
+  }) {
+    return AlarmaMusical(
+      id: id ?? this.id,
+      nombre: nombre ?? this.nombre,
+      activa: activa ?? this.activa,
+      hora: hora ?? this.hora,
+      minuto: minuto ?? this.minuto,
+      tipoProgramacion: tipoProgramacion ?? this.tipoProgramacion,
+      diasSemana: diasSemana ?? this.diasSemana,
+      emisora: emisora ?? this.emisora,
+      emisoraFallback: emisoraFallback ?? this.emisoraFallback,
+      sonarEnVacaciones: sonarEnVacaciones ?? this.sonarEnVacaciones,
+      snoozeMinutos: snoozeMinutos ?? this.snoozeMinutos,
+      volumen: volumen ?? this.volumen,
+      sonidoInterno: sonidoInterno ?? this.sonidoInterno,
+      proximaEjecucion: proximaEjecucion ?? this.proximaEjecucion,
+      creadaEn: creadaEn ?? this.creadaEn,
+      actualizadaEn: actualizadaEn ?? this.actualizadaEn,
+    );
+  }
+
+  Map<String, dynamic> toJson() => {
+    'id': id,
+    'nombre': nombre,
+    'activa': activa,
+    'hora': hora,
+    'minuto': minuto,
+    'tipoProgramacion': tipoProgramacion.name,
+    'diasSemana': diasSemana,
+    'emisora': emisora?.toMap(),
+    'emisoraFallback': emisoraFallback?.toMap(),
+    'sonarEnVacaciones': sonarEnVacaciones,
+    'snoozeMinutos': snoozeMinutos,
+    'volumen': volumen,
+    'sonidoInterno': sonidoInterno.name,
+    'proximaEjecucion': proximaEjecucion?.toIso8601String(),
+    'creadaEn': creadaEn?.toIso8601String(),
+    'actualizadaEn': actualizadaEn?.toIso8601String(),
+  };
+
+  factory AlarmaMusical.fromJson(Map<String, dynamic> json) {
+    return AlarmaMusical(
+      id: json['id'] as String,
+      nombre: json['nombre'] as String? ?? 'Alarma musical',
+      activa: json['activa'] as bool? ?? true,
+      hora: json['hora'] as int? ?? 7,
+      minuto: json['minuto'] as int? ?? 0,
+      tipoProgramacion: _enumFromName(
+        TipoProgramacionAlarma.values,
+        json['tipoProgramacion'] as String?,
+        TipoProgramacionAlarma.unica,
+      ),
+      diasSemana:
+          (json['diasSemana'] as List? ?? const [])
+              .whereType<int>()
+              .where((d) => d >= DateTime.monday && d <= DateTime.sunday)
+              .toList(),
+      emisora: _emisoraFromJson(json['emisora']),
+      emisoraFallback: _emisoraFromJson(json['emisoraFallback']),
+      sonarEnVacaciones: json['sonarEnVacaciones'] as bool? ?? true,
+      snoozeMinutos: json['snoozeMinutos'] as int? ?? 5,
+      volumen: (json['volumen'] as num?)?.toDouble() ?? 0.85,
+      sonidoInterno: _enumFromName(
+        SonidoInternoAlarma.values,
+        json['sonidoInterno'] as String?,
+        SonidoInternoAlarma.amanecer,
+      ),
+      proximaEjecucion: _dateFromJson(json['proximaEjecucion']),
+      creadaEn: _dateFromJson(json['creadaEn']),
+      actualizadaEn: _dateFromJson(json['actualizadaEn']),
+    );
+  }
+
+  static Emisora? _emisoraFromJson(Object? raw) {
+    if (raw is! Map) return null;
+    return Emisora.fromMap(Map<String, dynamic>.from(raw));
+  }
+
+  static DateTime? _dateFromJson(Object? raw) =>
+      raw is String ? DateTime.tryParse(raw) : null;
+
+  static T _enumFromName<T extends Enum>(
+    List<T> values,
+    String? name,
+    T fallback,
+  ) {
+    for (final value in values) {
+      if (value.name == name) return value;
+    }
+    return fallback;
+  }
+}
+
+class RangoVacaciones {
+  const RangoVacaciones({
+    required this.id,
+    required this.nombre,
+    required this.inicio,
+    required this.fin,
+    this.activo = true,
+  });
+
+  final String id;
+  final String nombre;
+  final DateTime inicio;
+  final DateTime fin;
+  final bool activo;
+
+  bool contiene(DateTime fecha) {
+    final dia = DateTime(fecha.year, fecha.month, fecha.day);
+    final desde = DateTime(inicio.year, inicio.month, inicio.day);
+    final hasta = DateTime(fin.year, fin.month, fin.day);
+    return activo && !dia.isBefore(desde) && !dia.isAfter(hasta);
+  }
+
+  Map<String, dynamic> toJson() => {
+    'id': id,
+    'nombre': nombre,
+    'inicio': inicio.toIso8601String(),
+    'fin': fin.toIso8601String(),
+    'activo': activo,
+  };
+
+  factory RangoVacaciones.fromJson(Map<String, dynamic> json) {
+    return RangoVacaciones(
+      id: json['id'] as String,
+      nombre: json['nombre'] as String? ?? 'Vacaciones',
+      inicio: DateTime.parse(json['inicio'] as String),
+      fin: DateTime.parse(json['fin'] as String),
+      activo: json['activo'] as bool? ?? true,
+    );
+  }
+}
+
+class ExcepcionAlarma {
+  const ExcepcionAlarma({
+    required this.alarmaId,
+    required this.ejecucion,
+    required this.tipo,
+  });
+
+  final String alarmaId;
+  final DateTime ejecucion;
+  final String tipo;
+
+  Map<String, dynamic> toJson() => {
+    'alarmaId': alarmaId,
+    'ejecucion': ejecucion.toIso8601String(),
+    'tipo': tipo,
+  };
+
+  factory ExcepcionAlarma.fromJson(Map<String, dynamic> json) {
+    return ExcepcionAlarma(
+      alarmaId: json['alarmaId'] as String,
+      ejecucion: DateTime.parse(json['ejecucion'] as String),
+      tipo: json['tipo'] as String? ?? 'skipNext',
+    );
+  }
+}

lib/pantallas/pantalla_alarmas.dart

@@ -0,0 +1,227 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+import '../estado/estado_alarmas.dart';
+import '../modelos/alarma_musical.dart';
+import '../widgets/pluri_glass_surface.dart';
+import '../widgets/pluri_icon.dart';
+import '../widgets/pluri_premium_widgets.dart';
+
+class PantallaAlarmas extends StatelessWidget {
+  const PantallaAlarmas({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final estado = context.watch<EstadoAlarmas>();
+
+    return ListView(
+      padding: const EdgeInsets.fromLTRB(0, 0, 0, 124),
+      children: [
+        PluriScreenHeader(
+          title: 'Alarmas musicales',
+          subtitle:
+              'Despertador con radio, vacaciones, aviso previo y fallbacks seguros.',
+          glyph: PluriIconGlyph.alarm,
+          primaryActionLabel: 'Nueva alarma',
+          onPrimaryAction: () => _crearDemo(context),
+          trailing: PluriStatusPill(
+            icon: Icons.alarm_on_rounded,
+            label: '${estado.alarmas.length} alarmas',
+          ),
+        ),
+        Padding(
+          padding: const EdgeInsets.symmetric(horizontal: 16),
+          child: Column(
+            children: [
+              _DiagnosticoAlarmas(estado: estado),
+              const SizedBox(height: 12),
+              if (estado.alarmas.isEmpty)
+                const _EmptyAlarmas()
+              else
+                for (final alarma in estado.alarmas) ...[
+                  _TarjetaAlarma(alarma: alarma),
+                  const SizedBox(height: 10),
+                ],
+            ],
+          ),
+        ),
+      ],
+    );
+  }
+
+  Future<void> _crearDemo(BuildContext context) async {
+    final estado = context.read<EstadoAlarmas>();
+    final ahora = TimeOfDay.now();
+    final alarma = estado.servicio.crearAlarma(
+      nombre: 'Despertador musical',
+      hora: ahora.hour,
+      minuto: (ahora.minute + 2) % 60,
+      tipoProgramacion: TipoProgramacionAlarma.diaria,
+      diasSemana: const [],
+    );
+    await estado.guardarAlarma(alarma);
+  }
+}
+
+class _DiagnosticoAlarmas extends StatelessWidget {
+  const _DiagnosticoAlarmas({required this.estado});
+
+  final EstadoAlarmas estado;
+
+  @override
+  Widget build(BuildContext context) {
+    final diag = estado.diagnostico;
+    return PluriGlassSurface(
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Row(
+            children: [
+              const Icon(Icons.health_and_safety_outlined),
+              const SizedBox(width: 12),
+              Text(
+                'Fiabilidad Android',
+                style: Theme.of(context).textTheme.titleMedium,
+              ),
+              const Spacer(),
+              IconButton(
+                tooltip: 'Revisar',
+                icon: const Icon(Icons.refresh_rounded),
+                onPressed: estado.cargarDiagnostico,
+              ),
+            ],
+          ),
+          const SizedBox(height: 8),
+          _EstadoPermiso(
+            label: 'Alarmas exactas',
+            ok: diag?.puedeProgramarExactas ?? false,
+          ),
+          _EstadoPermiso(
+            label: 'Notificaciones',
+            ok: diag?.notificacionesPermitidas ?? false,
+          ),
+          if (diag == null)
+            Text(
+              'Diagnóstico pendiente. En Android se revisan permisos nativos.',
+              style: Theme.of(context).textTheme.bodySmall,
+            ),
+        ],
+      ),
+    );
+  }
+}
+
+class _EstadoPermiso extends StatelessWidget {
+  const _EstadoPermiso({required this.label, required this.ok});
+
+  final String label;
+  final bool ok;
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      dense: true,
+      contentPadding: EdgeInsets.zero,
+      leading: Icon(
+        ok ? Icons.check_circle_rounded : Icons.warning_amber_rounded,
+        color: ok ? Colors.greenAccent : Colors.orangeAccent,
+      ),
+      title: Text(label),
+      subtitle: Text(ok ? 'Correcto' : 'Requiere revisión'),
+    );
+  }
+}
+
+class _TarjetaAlarma extends StatelessWidget {
+  const _TarjetaAlarma({required this.alarma});
+
+  final AlarmaMusical alarma;
+
+  @override
+  Widget build(BuildContext context) {
+    final estado = context.read<EstadoAlarmas>();
+    return PluriGlassSurface(
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          SwitchListTile.adaptive(
+            contentPadding: EdgeInsets.zero,
+            value: alarma.activa,
+            onChanged: (value) => estado.cambiarActiva(alarma, value),
+            title: Text(
+              _hora(alarma),
+              style: Theme.of(context).textTheme.headlineMedium,
+            ),
+            subtitle: Text(alarma.nombre),
+          ),
+          Wrap(
+            spacing: 8,
+            runSpacing: 8,
+            children: [
+              Chip(label: Text(_programacion(alarma))),
+              Chip(label: Text('Snooze ${alarma.snoozeMinutos} min')),
+              Chip(
+                label: Text(
+                  alarma.sonarEnVacaciones
+                      ? 'Suena en vacaciones'
+                      : 'Respeta vacaciones',
+                ),
+              ),
+            ],
+          ),
+          if (alarma.proximaEjecucion != null) ...[
+            const SizedBox(height: 8),
+            Text('Próxima: ${alarma.proximaEjecucion!.toLocal()}'),
+          ],
+          const SizedBox(height: 8),
+          Row(
+            children: [
+              TextButton.icon(
+                icon: const Icon(Icons.skip_next_rounded),
+                label: const Text('Saltar próxima'),
+                onPressed: () => estado.saltarProxima(alarma.id),
+              ),
+              const Spacer(),
+              IconButton(
+                tooltip: 'Eliminar',
+                icon: const Icon(Icons.delete_outline_rounded),
+                onPressed: () => estado.eliminarAlarma(alarma.id),
+              ),
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+
+  String _hora(AlarmaMusical alarma) =>
+      '${alarma.hora.toString().padLeft(2, '0')}:${alarma.minuto.toString().padLeft(2, '0')}';
+
+  String _programacion(AlarmaMusical alarma) {
+    return switch (alarma.tipoProgramacion) {
+      TipoProgramacionAlarma.unica => 'Una vez',
+      TipoProgramacionAlarma.diaria => 'Diaria',
+      TipoProgramacionAlarma.diasSemana =>
+        'Días: ${alarma.diasSemana.join(', ')}',
+    };
+  }
+}
+
+class _EmptyAlarmas extends StatelessWidget {
+  const _EmptyAlarmas();
+
+  @override
+  Widget build(BuildContext context) {
+    return const PluriGlassSurface(
+      child: Column(
+        children: [
+          Icon(Icons.alarm_add_rounded, size: 42),
+          SizedBox(height: 12),
+          Text('Todavía no hay alarmas.'),
+          SizedBox(height: 4),
+          Text('Crea una para empezar a diseñar tu despertar musical.'),
+        ],
+      ),
+    );
+  }
+}

lib/servicios/servicio_alarmas.dart

@@ -0,0 +1,217 @@
+import 'dart:convert';
+
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:uuid/uuid.dart';
+
+import '../modelos/alarma_musical.dart';
+import '../modelos/emisora.dart';
+import 'servicio_programacion_alarmas.dart';
+
+class ConfiguracionAlarmas {
+  const ConfiguracionAlarmas({
+    required this.alarmas,
+    required this.vacaciones,
+    required this.excepciones,
+  });
+
+  final List<AlarmaMusical> alarmas;
+  final List<RangoVacaciones> vacaciones;
+  final List<ExcepcionAlarma> excepciones;
+}
+
+class ServicioAlarmas {
+  ServicioAlarmas({
+    ServicioProgramacionAlarmas? programacion,
+    SharedPreferences? prefs,
+    DateTime Function()? reloj,
+  }) : _programacion = programacion ?? ServicioProgramacionAlarmas(),
+       _prefs = prefs,
+       _reloj = reloj ?? DateTime.now;
+
+  static const _keyConfig = 'alarmas_musicales_v1';
+  final ServicioProgramacionAlarmas _programacion;
+  final SharedPreferences? _prefs;
+  final DateTime Function() _reloj;
+  final _uuid = const Uuid();
+
+  Future<ConfiguracionAlarmas> cargar() async {
+    final prefs = await _resolverPrefs();
+    final raw = prefs.getString(_keyConfig);
+    if (raw == null || raw.trim().isEmpty) {
+      return const ConfiguracionAlarmas(
+        alarmas: [],
+        vacaciones: [],
+        excepciones: [],
+      );
+    }
+    try {
+      final data = jsonDecode(raw) as Map<String, dynamic>;
+      return ConfiguracionAlarmas(
+        alarmas:
+            (data['alarmas'] as List? ?? const [])
+                .whereType<Map>()
+                .map(
+                  (e) => AlarmaMusical.fromJson(Map<String, dynamic>.from(e)),
+                )
+                .toList(),
+        vacaciones:
+            (data['vacaciones'] as List? ?? const [])
+                .whereType<Map>()
+                .map(
+                  (e) => RangoVacaciones.fromJson(Map<String, dynamic>.from(e)),
+                )
+                .toList(),
+        excepciones:
+            (data['excepciones'] as List? ?? const [])
+                .whereType<Map>()
+                .map(
+                  (e) => ExcepcionAlarma.fromJson(Map<String, dynamic>.from(e)),
+                )
+                .toList(),
+      );
+    } catch (_) {
+      return const ConfiguracionAlarmas(
+        alarmas: [],
+        vacaciones: [],
+        excepciones: [],
+      );
+    }
+  }
+
+  Future<ConfiguracionAlarmas> guardarAlarma(
+    AlarmaMusical alarma, {
+    List<RangoVacaciones>? vacaciones,
+    List<ExcepcionAlarma>? excepciones,
+  }) async {
+    final config = await cargar();
+    final ahora = _reloj();
+    final alarmas = List<AlarmaMusical>.from(config.alarmas);
+    final index = alarmas.indexWhere((a) => a.id == alarma.id);
+    final normalizada = _recalcular(
+      alarma.copyWith(creadaEn: alarma.creadaEn ?? ahora, actualizadaEn: ahora),
+      vacaciones ?? config.vacaciones,
+      excepciones ?? config.excepciones,
+    );
+
+    if (index >= 0) {
+      alarmas[index] = normalizada;
+    } else {
+      alarmas.add(normalizada);
+    }
+    final nuevo = ConfiguracionAlarmas(
+      alarmas: alarmas,
+      vacaciones: vacaciones ?? config.vacaciones,
+      excepciones: excepciones ?? config.excepciones,
+    );
+    await _guardar(nuevo);
+    return nuevo;
+  }
+
+  Future<ConfiguracionAlarmas> eliminarAlarma(String id) async {
+    final config = await cargar();
+    final nuevo = ConfiguracionAlarmas(
+      alarmas: config.alarmas.where((a) => a.id != id).toList(),
+      vacaciones: config.vacaciones,
+      excepciones: config.excepciones.where((e) => e.alarmaId != id).toList(),
+    );
+    await _guardar(nuevo);
+    return nuevo;
+  }
+
+  Future<ConfiguracionAlarmas> guardarVacaciones(
+    List<RangoVacaciones> vacaciones,
+  ) async {
+    final config = await cargar();
+    final alarmas =
+        config.alarmas
+            .map((a) => _recalcular(a, vacaciones, config.excepciones))
+            .toList();
+    final nuevo = ConfiguracionAlarmas(
+      alarmas: alarmas,
+      vacaciones: vacaciones,
+      excepciones: config.excepciones,
+    );
+    await _guardar(nuevo);
+    return nuevo;
+  }
+
+  Future<ConfiguracionAlarmas> saltarProxima(String alarmaId) async {
+    final config = await cargar();
+    final alarma = config.alarmas.firstWhere((a) => a.id == alarmaId);
+    final proxima = alarma.proximaEjecucion;
+    if (proxima == null) return config;
+
+    final excepciones = [
+      ...config.excepciones,
+      ExcepcionAlarma(alarmaId: alarmaId, ejecucion: proxima, tipo: 'skipNext'),
+    ];
+    final alarmas =
+        config.alarmas
+            .map(
+              (a) =>
+                  a.id == alarmaId
+                      ? _recalcular(a, config.vacaciones, excepciones)
+                      : a,
+            )
+            .toList();
+    final nuevo = ConfiguracionAlarmas(
+      alarmas: alarmas,
+      vacaciones: config.vacaciones,
+      excepciones: excepciones,
+    );
+    await _guardar(nuevo);
+    return nuevo;
+  }
+
+  AlarmaMusical crearAlarma({
+    required String nombre,
+    required int hora,
+    required int minuto,
+    required TipoProgramacionAlarma tipoProgramacion,
+    required List<int> diasSemana,
+    Emisora? emisora,
+  }) {
+    final ahora = _reloj();
+    return AlarmaMusical(
+      id: _uuid.v4(),
+      nombre: nombre,
+      hora: hora,
+      minuto: minuto,
+      tipoProgramacion: tipoProgramacion,
+      diasSemana: diasSemana,
+      emisora: emisora,
+      creadaEn: ahora,
+      actualizadaEn: ahora,
+    );
+  }
+
+  Future<void> _guardar(ConfiguracionAlarmas config) async {
+    final prefs = await _resolverPrefs();
+    await prefs.setString(
+      _keyConfig,
+      jsonEncode({
+        'alarmas': config.alarmas.map((a) => a.toJson()).toList(),
+        'vacaciones': config.vacaciones.map((v) => v.toJson()).toList(),
+        'excepciones': config.excepciones.map((e) => e.toJson()).toList(),
+      }),
+    );
+  }
+
+  AlarmaMusical _recalcular(
+    AlarmaMusical alarma,
+    List<RangoVacaciones> vacaciones,
+    List<ExcepcionAlarma> excepciones,
+  ) {
+    return alarma.copyWith(
+      proximaEjecucion: _programacion.calcularProxima(
+        alarma: alarma,
+        desde: _reloj(),
+        vacaciones: vacaciones,
+        excepciones: excepciones,
+      ),
+    );
+  }
+
+  Future<SharedPreferences> _resolverPrefs() async =>
+      _prefs ?? SharedPreferences.getInstance();
+}

lib/servicios/servicio_alarmas_android.dart

@@ -0,0 +1,59 @@
+import 'package:flutter/services.dart';
+
+import '../modelos/alarma_musical.dart';
+
+class DiagnosticoAlarmasAndroid {
+  const DiagnosticoAlarmasAndroid({
+    required this.puedeProgramarExactas,
+    required this.notificacionesPermitidas,
+    required this.fabricante,
+    required this.versionSdk,
+  });
+
+  final bool puedeProgramarExactas;
+  final bool notificacionesPermitidas;
+  final String fabricante;
+  final int versionSdk;
+
+  factory DiagnosticoAlarmasAndroid.fromMap(Map<Object?, Object?> map) {
+    return DiagnosticoAlarmasAndroid(
+      puedeProgramarExactas: map['canScheduleExactAlarms'] as bool? ?? true,
+      notificacionesPermitidas: map['notificationsEnabled'] as bool? ?? true,
+      fabricante: map['manufacturer'] as String? ?? 'Android',
+      versionSdk: map['sdkInt'] as int? ?? 0,
+    );
+  }
+}
+
+class ServicioAlarmasAndroid {
+  ServicioAlarmasAndroid({
+    MethodChannel channel = const MethodChannel('pluriwave/alarm_scheduler'),
+  }) : _channel = channel;
+
+  final MethodChannel _channel;
+
+  Future<void> programar(AlarmaMusical alarma) async {
+    final proxima = alarma.proximaEjecucion;
+    if (proxima == null || !alarma.activa) {
+      await cancelar(alarma.id);
+      return;
+    }
+    await _channel.invokeMethod<void>('scheduleAlarm', {
+      'id': alarma.id,
+      'title': alarma.nombre,
+      'triggerAtMillis': proxima.millisecondsSinceEpoch,
+      'preNoticeAtMillis':
+          proxima.subtract(const Duration(minutes: 30)).millisecondsSinceEpoch,
+    });
+  }
+
+  Future<void> cancelar(String alarmaId) =>
+      _channel.invokeMethod<void>('cancelAlarm', {'id': alarmaId});
+
+  Future<DiagnosticoAlarmasAndroid> diagnostico() async {
+    final raw = await _channel.invokeMethod<Map<Object?, Object?>>(
+      'diagnostics',
+    );
+    return DiagnosticoAlarmasAndroid.fromMap(raw ?? const {});
+  }
+}

lib/servicios/servicio_programacion_alarmas.dart

@@ -0,0 +1,104 @@
+import '../modelos/alarma_musical.dart';
+
+class ServicioProgramacionAlarmas {
+  DateTime? calcularProxima({
+    required AlarmaMusical alarma,
+    required DateTime desde,
+    List<RangoVacaciones> vacaciones = const [],
+    List<ExcepcionAlarma> excepciones = const [],
+  }) {
+    if (!alarma.activa) return null;
+
+    final inicio = DateTime(
+      desde.year,
+      desde.month,
+      desde.day,
+      alarma.hora,
+      alarma.minuto,
+    );
+    final primerCandidato =
+        inicio.isAfter(desde) ? inicio : inicio.add(const Duration(days: 1));
+
+    return switch (alarma.tipoProgramacion) {
+      TipoProgramacionAlarma.unica =>
+        _esValida(alarma, primerCandidato, vacaciones, excepciones)
+            ? primerCandidato
+            : null,
+      TipoProgramacionAlarma.diaria => _buscarDiaria(
+        alarma,
+        primerCandidato,
+        vacaciones,
+        excepciones,
+      ),
+      TipoProgramacionAlarma.diasSemana => _buscarPorDiasSemana(
+        alarma,
+        primerCandidato,
+        vacaciones,
+        excepciones,
+      ),
+    };
+  }
+
+  DateTime calcularSnooze(DateTime desde, int minutos) {
+    final seguro = minutos == 3 || minutos == 5 || minutos == 10 ? minutos : 5;
+    return desde.add(Duration(minutes: seguro));
+  }
+
+  bool estaEnVacaciones(DateTime fecha, List<RangoVacaciones> vacaciones) =>
+      vacaciones.any((rango) => rango.contiene(fecha));
+
+  DateTime? _buscarDiaria(
+    AlarmaMusical alarma,
+    DateTime candidato,
+    List<RangoVacaciones> vacaciones,
+    List<ExcepcionAlarma> excepciones,
+  ) {
+    var actual = candidato;
+    for (var i = 0; i < 370; i++) {
+      if (_esValida(alarma, actual, vacaciones, excepciones)) return actual;
+      actual = actual.add(const Duration(days: 1));
+    }
+    return null;
+  }
+
+  DateTime? _buscarPorDiasSemana(
+    AlarmaMusical alarma,
+    DateTime candidato,
+    List<RangoVacaciones> vacaciones,
+    List<ExcepcionAlarma> excepciones,
+  ) {
+    if (alarma.diasSemana.isEmpty) return null;
+    var actual = candidato;
+    for (var i = 0; i < 370; i++) {
+      if (alarma.diasSemana.contains(actual.weekday) &&
+          _esValida(alarma, actual, vacaciones, excepciones)) {
+        return actual;
+      }
+      actual = actual.add(const Duration(days: 1));
+    }
+    return null;
+  }
+
+  bool _esValida(
+    AlarmaMusical alarma,
+    DateTime candidato,
+    List<RangoVacaciones> vacaciones,
+    List<ExcepcionAlarma> excepciones,
+  ) {
+    if (!alarma.sonarEnVacaciones && estaEnVacaciones(candidato, vacaciones)) {
+      return false;
+    }
+    return !excepciones.any(
+      (excepcion) =>
+          excepcion.alarmaId == alarma.id &&
+          _mismaEjecucion(excepcion.ejecucion, candidato),
+    );
+  }
+
+  bool _mismaEjecucion(DateTime a, DateTime b) =>
+      a.year == b.year &&
+      a.month == b.month &&
+      a.day == b.day &&
+      a.hour == b.hour &&
+      a.minute == b.minute;
+}

lib/widgets/pluri_icon.dart

@@ -3,7 +3,7 @@ import 'package:flutter/material.dart';
 import '../tema/pluriwave_tokens.dart';
 import '../tema/pluriwave_theme.dart';
 
-enum PluriIconGlyph { home, search, favorites, player, settings }
+enum PluriIconGlyph { home, search, favorites, alarm, player, settings }
 
 enum PluriIconVariant { outline, filled, activeGlow }
 
@@ -26,40 +26,40 @@ class PluriIcon extends StatelessWidget {
     final tokens = context.pluriTokens;
     final asset = _resolveAsset();
     final resolvedColor = _resolveColor(context, tokens);
-    final icon = asset == null
-        ? Icon(_resolveData(), size: size, color: resolvedColor)
-        : Opacity(
-            opacity: variant == PluriIconVariant.outline ? 0.78 : 1,
-            child: Image.asset(
-              asset,
-              width: size,
-              height: size,
-              fit: BoxFit.contain,
-              errorBuilder: (_, __, ___) => Icon(
-                _resolveData(),
-                size: size,
-                color: resolvedColor,
+    final icon =
+        asset == null
+            ? Icon(_resolveData(), size: size, color: resolvedColor)
+            : Opacity(
+              opacity: variant == PluriIconVariant.outline ? 0.78 : 1,
+              child: Image.asset(
+                asset,
+                width: size,
+                height: size,
+                fit: BoxFit.contain,
+                errorBuilder:
+                    (_, __, ___) =>
+                        Icon(_resolveData(), size: size, color: resolvedColor),
               ),
-            ),
-          );
-    final child = variant == PluriIconVariant.activeGlow
-        ? Container(
-            width: size + 14,
-            height: size + 14,
-            decoration: BoxDecoration(
-              shape: BoxShape.circle,
-              boxShadow: [
-                BoxShadow(
-                  color: tokens.glowColor,
-                  blurRadius: 18,
-                  spreadRadius: 1,
-                ),
-              ],
-            ),
-            alignment: Alignment.center,
-            child: icon,
-          )
-        : icon;
+            );
+    final child =
+        variant == PluriIconVariant.activeGlow
+            ? Container(
+              width: size + 14,
+              height: size + 14,
+              decoration: BoxDecoration(
+                shape: BoxShape.circle,
+                boxShadow: [
+                  BoxShadow(
+                    color: tokens.glowColor,
+                    blurRadius: 18,
+                    spreadRadius: 1,
+                  ),
+                ],
+              ),
+              alignment: Alignment.center,
+              child: icon,
+            )
+            : icon;
 
     return Semantics(
       label: semanticLabel ?? _fallbackLabel(glyph),
@@ -68,13 +68,12 @@ class PluriIcon extends StatelessWidget {
     );
   }
 
-
-
   String? _resolveAsset() {
     return switch (glyph) {
       PluriIconGlyph.home => 'assets/icons/pluri_home.png',
       PluriIconGlyph.search => 'assets/icons/pluri_search.png',
       PluriIconGlyph.favorites => 'assets/icons/pluri_favorites.png',
+      PluriIconGlyph.alarm => null,
       PluriIconGlyph.player => 'assets/icons/pluri_player.png',
       PluriIconGlyph.settings => 'assets/icons/pluri_settings.png',
     };
@@ -82,7 +81,9 @@ class PluriIcon extends StatelessWidget {
 
   Color _resolveColor(BuildContext context, PluriWaveTokens tokens) {
     if (variant == PluriIconVariant.activeGlow) return tokens.electricMagenta;
-    if (variant == PluriIconVariant.filled) return Theme.of(context).colorScheme.onSurface;
+    if (variant == PluriIconVariant.filled) {
+      return Theme.of(context).colorScheme.onSurface;
+    }
     return Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.78);
   }
 
@@ -90,13 +91,19 @@ class PluriIcon extends StatelessWidget {
     return switch ((glyph, variant)) {
       (PluriIconGlyph.home, PluriIconVariant.outline) => Icons.home_outlined,
       (PluriIconGlyph.home, _) => Icons.home_rounded,
-      (PluriIconGlyph.search, PluriIconVariant.outline) => Icons.search_outlined,
+      (PluriIconGlyph.search, PluriIconVariant.outline) =>
+        Icons.search_outlined,
       (PluriIconGlyph.search, _) => Icons.search_rounded,
-      (PluriIconGlyph.favorites, PluriIconVariant.outline) => Icons.favorite_border_rounded,
+      (PluriIconGlyph.favorites, PluriIconVariant.outline) =>
+        Icons.favorite_border_rounded,
       (PluriIconGlyph.favorites, _) => Icons.favorite_rounded,
-      (PluriIconGlyph.player, PluriIconVariant.outline) => Icons.play_circle_outline_rounded,
+      (PluriIconGlyph.alarm, PluriIconVariant.outline) => Icons.alarm_outlined,
+      (PluriIconGlyph.alarm, _) => Icons.alarm_rounded,
+      (PluriIconGlyph.player, PluriIconVariant.outline) =>
+        Icons.play_circle_outline_rounded,
       (PluriIconGlyph.player, _) => Icons.play_circle_rounded,
-      (PluriIconGlyph.settings, PluriIconVariant.outline) => Icons.settings_outlined,
+      (PluriIconGlyph.settings, PluriIconVariant.outline) =>
+        Icons.settings_outlined,
       (PluriIconGlyph.settings, _) => Icons.settings_rounded,
     };
   }
@@ -106,6 +113,7 @@ class PluriIcon extends StatelessWidget {
       PluriIconGlyph.home => 'Inicio',
       PluriIconGlyph.search => 'Buscar',
       PluriIconGlyph.favorites => 'Favoritos',
+      PluriIconGlyph.alarm => 'Alarmas',
       PluriIconGlyph.player => 'Reproductor',
       PluriIconGlyph.settings => 'Ajustes',
     };

openspec/changes/alarm-clock-module/design.md

@@ -0,0 +1,37 @@
+# Design: alarm-clock-module
+
+## Architecture
+- Flutter owns alarm domain data, UX, recurrence calculation, and persistence.
+- Android owns exact wakeup delivery through AlarmManager/setAlarmClock and notification actions.
+- Communication uses a MethodChannel, tentatively `pluriwave/alarm_scheduler`.
+- Existing `ServicioTimer` remains unchanged; a new `ServicioAlarmas` manages alarms.
+
+## Data model
+- `AlarmaMusical`: id, name, enabled, hour, minute, scheduleType, weekdays, stationUuid/url snapshot, fallbackStation snapshot, bundledSoundId, volume, snoozeMinutes, soundOnVacation, nextOccurrenceAt.
+- `RangoVacaciones`: id, name, startDate, endDate, enabled.
+- `ExcepcionAlarma`: alarmId, occurrenceAt, type (`skipNext`, `snooze`, `vacation`).
+- `EjecucionAlarma`: scheduledAt, firedAt, status, fallbackUsed, failureReason.
+
+## Persistence
+Use JSON files or SharedPreferences for MVP to avoid risky DB migrations. If alarm history grows, migrate to sqflite later.
+
+## Android native components
+- `PluriWaveAlarmReceiver`: receives exact alarm and pre-alarm actions.
+- `PluriWaveAlarmScheduler`: schedules/cancels next alarm and pre-notification.
+- `PluriWaveAlarmActivity` or full-screen notification target for the ringing UI.
+- Notification channels:
+  - `alarm_pre_notice`: silent, low/default importance, no sound.
+  - `alarm_ringing`: high importance for active alarms.
+
+## Audio strategy
+MVP: when the alarm fires, bring the Flutter app/alarm screen forward and use existing audio_service to play station/fallback. If Flutter/audio startup fails, Android should be able to play a bundled raw sound as last fallback.
+
+## Reliability diagnostics
+Expose statuses for:
+- exact alarm permission (`canScheduleExactAlarms`).
+- notification permission.
+- battery optimization warning.
+- DND policy access for optional override.
+
+## Key decision
+Use `setAlarmClock` for actual alarm occurrences because Android treats these as critical and visible user alarms. Use a separate exact/inexact notification alarm for the 30-minute silent pre-notice depending on permission and platform behavior.

openspec/changes/alarm-clock-module/proposal.md

@@ -0,0 +1,32 @@
+# Proposal: alarm-clock-module
+
+## Intent
+Build an Android-first musical alarm system for PluriWave that can wake the user with radio/music while keeping reliable fallbacks and clear Android permission diagnostics.
+
+## Scope
+- Add a new alarm domain separate from the existing sleep timer.
+- Support one-shot and recurrent alarms by weekday.
+- Support snooze options: 3, 5, and 10 minutes.
+- Support a silent pre-alarm notification 30 minutes before the next occurrence, with an action to skip only that next execution.
+- Support vacation ranges and per-alarm `soundOnVacation` behavior. Default: true.
+- Support audio fallback chain: selected station, optional fallback station, bundled internal alarm sounds.
+- Add Android native scheduling using AlarmManager/setAlarmClock via MethodChannel.
+- Add Flutter UI for listing, editing, enabling/disabling, vacation ranges, and reliability diagnostics.
+
+## Out of Scope for MVP
+- Cloud sync.
+- iOS reliable alarm parity.
+- Complex alarm-dismiss challenges.
+- Multiple fallback station chains beyond one optional fallback station.
+- Full background radio streaming implementation independent from existing audio_service if not needed for MVP.
+
+## Rollback Plan
+- Alarm functionality is isolated behind new services/models/screens and Android receivers.
+- Existing radio playback, timer, favorites, EQ, and recording flows should remain untouched except for navigation entry points.
+- If native scheduling causes issues, remove Android manifest receiver/service entries and hide the alarms entry point.
+
+## Risks
+- Android exact alarms require special permissions on Android 12+ and can be denied by default on Android 14+.
+- OEM battery managers may still interfere; app must expose diagnostics and guidance.
+- DND bypass requires Notification Policy Access and cannot be silently forced.
+- Playing a radio stream at alarm time depends on network; bundled sounds must always be present.

openspec/changes/alarm-clock-module/spec.md

@@ -0,0 +1,62 @@
+# Spec: alarm-clock-module
+
+## Requirement: Alarm scheduling
+The app MUST support creating enabled/disabled alarms with a local time, one-shot or recurring schedule, and next occurrence calculation.
+
+### Scenario: one-shot alarm fires once
+Given an enabled one-shot alarm for a future date/time
+When its scheduled occurrence fires
+Then the app MUST start the alarm flow
+And the alarm MUST be disabled or marked completed after that occurrence unless snoozed.
+
+### Scenario: weekday recurring alarm
+Given an enabled recurring alarm with selected weekdays
+When the next matching weekday/time arrives
+Then the app MUST start the alarm flow
+And MUST schedule the following matching occurrence.
+
+## Requirement: Snooze
+The app MUST offer snooze durations of 3, 5, and 10 minutes when an alarm is ringing.
+
+### Scenario: snooze selected
+Given an alarm is ringing
+When the user selects snooze 5 minutes
+Then the app MUST stop current alarm playback
+And MUST schedule a one-off snooze occurrence 5 minutes later.
+
+## Requirement: Pre-alarm notification
+The app MUST schedule a silent notification 30 minutes before each next alarm occurrence when notification permission is available.
+
+### Scenario: skip next occurrence from notification
+Given a pre-alarm notification is visible
+When the user taps skip next occurrence
+Then the app MUST record a skip for that alarm occurrence
+And MUST not fire that specific occurrence
+And MUST preserve future recurring occurrences.
+
+## Requirement: Vacation ranges
+The app MUST support global vacation ranges with start/end dates and per-alarm `soundOnVacation` flag defaulting to true.
+
+### Scenario: alarm disabled for vacation date
+Given today is inside an enabled vacation range
+And an alarm has `soundOnVacation=false`
+When calculating next occurrence
+Then the app MUST skip occurrences inside that vacation range.
+
+## Requirement: Audio fallback
+The app MUST never depend solely on an internet radio stream to ring.
+
+### Scenario: selected station fails
+Given an alarm starts with a selected radio station
+When the stream fails or does not become ready before timeout
+Then the app MUST try a fallback station if configured
+And otherwise MUST play a bundled internal alarm sound.
+
+## Requirement: Android reliability
+The app MUST use native Android scheduling for alarm occurrences and expose permission/diagnostic status.
+
+### Scenario: exact alarm permission missing
+Given Android denies exact alarm scheduling
+When the user views alarm diagnostics
+Then the app MUST show that exact alarm permission is missing
+And MUST provide guidance to enable it.

openspec/changes/alarm-clock-module/state.yaml

@@ -0,0 +1,6 @@
+change: alarm-clock-module
+status: planned
+artifact_store: hybrid
+created: 2026-05-21
+updated: 2026-05-21
+phase: tasks-ready

openspec/changes/alarm-clock-module/tasks.md

@@ -0,0 +1,31 @@
+# Tasks: alarm-clock-module
+
+## Phase 1: domain and tests
+- [ ] Add alarm domain models: alarm, vacation range, skip/exception, execution status.
+- [ ] Add recurrence calculator with tests for one-shot, weekdays, vacations, skip-next, snooze.
+- [ ] Add alarm persistence service with tests.
+
+## Phase 2: Android scheduling bridge
+- [ ] Add MethodChannel scheduler interface in Flutter.
+- [ ] Add Kotlin scheduler using AlarmManager/setAlarmClock.
+- [ ] Add BroadcastReceiver for alarm firing and pre-alarm actions.
+- [ ] Add manifest permissions and receiver declarations.
+- [ ] Add diagnostics method for exact alarm permission.
+
+## Phase 3: app state and UI
+- [ ] Add `EstadoAlarmas` or integrate alarm slice without bloating `EstadoRadio`.
+- [ ] Add alarms tab/entry point.
+- [ ] Add alarm list, editor, vacation ranges UI, and diagnostics panel.
+- [ ] Add ringing screen with stop/snooze 3/5/10.
+
+## Phase 4: audio fallback
+- [ ] Add bundled internal alarm sounds under assets.
+- [ ] Implement fallback sequence with timeouts.
+- [ ] Add optional fallback station selection.
+- [ ] Add volume/fade-in behavior.
+
+## Phase 5: verification
+- [ ] Run `dart format`.
+- [ ] Run `flutter analyze --no-fatal-infos`.
+- [ ] Run targeted tests if local runner does not hang.
+- [ ] Document Android limitations and permission flow.

test/servicios/servicio_programacion_alarmas_test.dart

@@ -0,0 +1,87 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:pluriwave/modelos/alarma_musical.dart';
+import 'package:pluriwave/servicios/servicio_programacion_alarmas.dart';
+
+void main() {
+  group('ServicioProgramacionAlarmas', () {
+    final servicio = ServicioProgramacionAlarmas();
+
+    test('calcula la próxima alarma diaria futura', () {
+      final alarma = AlarmaMusical(
+        id: 'a1',
+        nombre: 'Diaria',
+        hora: 7,
+        minuto: 30,
+        tipoProgramacion: TipoProgramacionAlarma.diaria,
+        diasSemana: const [],
+      );
+
+      final proxima = servicio.calcularProxima(
+        alarma: alarma,
+        desde: DateTime(2026, 5, 21, 7),
+      );
+
+      expect(proxima, DateTime(2026, 5, 21, 7, 30));
+    });
+
+    test('salta vacaciones si la alarma no debe sonar esos días', () {
+      final alarma = AlarmaMusical(
+        id: 'a2',
+        nombre: 'Laboral',
+        hora: 8,
+        minuto: 0,
+        tipoProgramacion: TipoProgramacionAlarma.diaria,
+        diasSemana: const [],
+        sonarEnVacaciones: false,
+      );
+
+      final proxima = servicio.calcularProxima(
+        alarma: alarma,
+        desde: DateTime(2026, 8, 1, 7),
+        vacaciones: [
+          RangoVacaciones(
+            id: 'v1',
+            nombre: 'Verano',
+            inicio: DateTime(2026, 8),
+            fin: DateTime(2026, 8, 3),
+          ),
+        ],
+      );
+
+      expect(proxima, DateTime(2026, 8, 4, 8));
+    });
+
+    test('saltar próxima solo omite esa ejecución', () {
+      final alarma = AlarmaMusical(
+        id: 'a3',
+        nombre: 'Diaria',
+        hora: 9,
+        minuto: 0,
+        tipoProgramacion: TipoProgramacionAlarma.diaria,
+        diasSemana: const [],
+      );
+      final omitida = DateTime(2026, 5, 22, 9);
+
+      final proxima = servicio.calcularProxima(
+        alarma: alarma,
+        desde: DateTime(2026, 5, 22, 8),
+        excepciones: [
+          ExcepcionAlarma(alarmaId: 'a3', ejecucion: omitida, tipo: 'skipNext'),
+        ],
+      );
+
+      expect(proxima, DateTime(2026, 5, 23, 9));
+    });
+
+    test('snooze solo permite 3, 5 o 10 minutos y cae a 5', () {
+      expect(
+        servicio.calcularSnooze(DateTime(2026, 5, 21, 7), 10),
+        DateTime(2026, 5, 21, 7, 10),
+      );
+      expect(
+        servicio.calcularSnooze(DateTime(2026, 5, 21, 7), 99),
+        DateTime(2026, 5, 21, 7, 5),
+      );
+    });
+  });
+}