i18n(alarm): localize all native notification, channel and chooser texts

Centralize every native-side user-facing string in a single
AlarmNotificationStrings store written by Flutter via a new
setNotificationStrings MethodChannel whenever the app locale changes,
and read at notification/channel build time (with English fallbacks)
even when the engine is dead. This replaces the hardcoded Spanish text
in the ringing notification ("Alarma PluriWave", "Posponer", "Detener"),
the pre-notice notification ("Posponer", "Omitir esta vez"), both
notification channels (names + descriptions) and the file-action
choosers ("Abrir carpeta", "Abrir grabación").

The per-alarm preNoticeTemplate/snoozeCountdown template+label args are
dropped from scheduleAlarm and the persisted spec and folded into the
shared store, so a locale change now also relocalizes already-scheduled
alarms. Channels are re-created on each use so their name/description
refresh after a language switch.

Adds alarmRingingNotificationTitle, alarmFire/PreNoticeChannelName,
alarmFire/PreNoticeChannelDescription and openFolder/openRecording
chooser keys across all 13 locales (reusing snoozeAction, stopAlarmAction,
skipNextAction, snoozeAgainAction). Rewrites the template test around
setNotificationStrings. Kotlin is static-reviewed only; no Android build
environment available here.

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

@@ -0,0 +1,72 @@
+package es.freetimelab.pluriwave
+
+import android.content.Context
+
+/**
+ * Localized strings for native alarm notifications, channels and choosers.
+ *
+ * Flutter is the single source of truth for i18n: it pushes the current-locale
+ * strings via the `setNotificationStrings` MethodChannel whenever the app locale
+ * is (re)configured. They are persisted in device-protected storage so the
+ * native side can read them when building a notification or channel even while
+ * the Flutter engine is dead (alarm fired from a killed app, after reboot, in
+ * direct-boot). Every getter falls back to English when a value is unset.
+ */
+object AlarmNotificationStrings {
+    private const val PREFS = "pluriwave_alarm_strings"
+
+    const val KEY_RING_TITLE = "ringTitle"
+    const val KEY_SNOOZE = "snoozeLabel"
+    const val KEY_STOP = "stopLabel"
+    const val KEY_SKIP = "skipLabel"
+    const val KEY_SNOOZE_AGAIN = "snoozeAgainLabel"
+    const val KEY_FIRE_CHANNEL_NAME = "fireChannelName"
+    const val KEY_FIRE_CHANNEL_DESC = "fireChannelDescription"
+    const val KEY_PRE_NOTICE_CHANNEL_NAME = "preNoticeChannelName"
+    const val KEY_PRE_NOTICE_CHANNEL_DESC = "preNoticeChannelDescription"
+    const val KEY_PRE_NOTICE_TEMPLATE = "preNoticeTemplate"
+    const val KEY_SNOOZE_COUNTDOWN_TEMPLATE = "snoozeCountdownTemplate"
+    const val KEY_OPEN_FOLDER = "openFolderTitle"
+    const val KEY_OPEN_RECORDING = "openRecordingTitle"
+
+    /** Persists the localized strings pushed by Flutter. Blank values are removed. */
+    fun save(context: Context, values: Map<String, Any?>) {
+        val editor = prefs(context).edit()
+        for ((key, value) in values) {
+            val str = value as? String
+            if (str.isNullOrBlank()) editor.remove(key) else editor.putString(key, str)
+        }
+        editor.apply()
+    }
+
+    fun ringTitle(context: Context) = get(context, KEY_RING_TITLE, "PluriWave alarm")
+    fun snoozeLabel(context: Context) = get(context, KEY_SNOOZE, "Snooze")
+    fun stopLabel(context: Context) = get(context, KEY_STOP, "Stop")
+    fun skipLabel(context: Context) = get(context, KEY_SKIP, "Skip this time")
+    fun snoozeAgainLabel(context: Context) = get(context, KEY_SNOOZE_AGAIN, "Snooze again")
+    fun fireChannelName(context: Context) = get(context, KEY_FIRE_CHANNEL_NAME, "Ringing alarms")
+    fun fireChannelDescription(context: Context) =
+        get(context, KEY_FIRE_CHANNEL_DESC, "Urgent sound and screen when a music alarm must ring")
+    fun preNoticeChannelName(context: Context) =
+        get(context, KEY_PRE_NOTICE_CHANNEL_NAME, "Alarm reminders")
+    fun preNoticeChannelDescription(context: Context) =
+        get(context, KEY_PRE_NOTICE_CHANNEL_DESC, "Silent notifications before the alarm")
+    fun openFolderTitle(context: Context) = get(context, KEY_OPEN_FOLDER, "Open folder")
+    fun openRecordingTitle(context: Context) = get(context, KEY_OPEN_RECORDING, "Open recording")
+
+    fun preNoticeText(context: Context, minutes: Long): String =
+        format(get(context, KEY_PRE_NOTICE_TEMPLATE, "Starts in {minutes} min"), minutes)
+
+    fun snoozeCountdownText(context: Context, minutes: Long): String =
+        format(get(context, KEY_SNOOZE_COUNTDOWN_TEMPLATE, "Rings in {minutes} min"), minutes)
+
+    private fun format(template: String, minutes: Long): String =
+        template.replace("{minutes}", minutes.toString())
+
+    private fun get(context: Context, key: String, fallback: String): String =
+        prefs(context).getString(key, null)?.takeIf { it.isNotBlank() } ?: fallback
+
+    private fun prefs(context: Context) =
+        context.applicationContext.createDeviceProtectedStorageContext()
+            .getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+}

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

@@ -1,11 +1,14 @@
 package es.freetimelab.pluriwave
 
 import android.app.AlarmManager
+import android.app.NotificationChannel
+import android.app.NotificationManager
 import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
 import android.os.Build
 import android.util.Log
+import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import org.json.JSONArray
 import org.json.JSONObject
@@ -39,8 +42,7 @@ class AlarmScheduler(private val context: Context) {
         snoozeMinutes: Int = 5,
         fallbackStationName: String? = null,
         fallbackStationUrl: String? = null,
-        fadeInSegundos: Int = 0,
-        preNoticeTemplate: String? = null
+        fadeInSegundos: Int = 0
     ): Boolean {
         val existing = readSpec(id)
         val preservedSnooze = preserveNativeSnooze(
@@ -71,8 +73,7 @@ class AlarmScheduler(private val context: Context) {
             fallbackSound = fallbackSound,
             volume = volume.coerceIn(0f, 1f),
             fadeInSegundos = fadeInSegundos.coerceIn(0, 60),
-            timezoneId = TimeZone.getDefault().id,
-            preNoticeTemplate = preNoticeTemplate
+            timezoneId = TimeZone.getDefault().id
         )
         return scheduleSpec(spec, persistOnSuccess = true)
     }
@@ -118,7 +119,19 @@ class AlarmScheduler(private val context: Context) {
         if (persistOnSuccess) {
             saveScheduledAlarm(scheduledSpec)
         }
-        schedulePreNotice(scheduledSpec)
+        if (scheduledSpec.snoozeUntilMillis != null) {
+            // Snoozed: drive the per-minute countdown notification instead of
+            // the 30-minute pre-notice (which makes no sense for a short snooze).
+            scheduleSnoozeCountdown(scheduledSpec)
+        } else {
+            // Normal occurrence: make sure no stale snooze countdown survives a
+            // transition from snoozed -> normal, then arm the pre-notice.
+            cancelSnoozeCountdown(scheduledSpec.id)
+            NotificationManagerCompat.from(appContext).cancel(
+                PluriWaveAlarmReceiver.notificationIdForAlarm(scheduledSpec.id)
+            )
+            schedulePreNotice(scheduledSpec)
+        }
         return true
     }
 
@@ -147,7 +160,6 @@ class AlarmScheduler(private val context: Context) {
                                 PluriWaveAlarmReceiver.EXTRA_OCCURRENCE_AT,
                                 spec.snoozeOriginMillis ?: spec.triggerAtMillis
                             )
-                            putExtra(EXTRA_PRE_NOTICE_TEMPLATE, spec.preNoticeTemplate)
                         },
                         PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
                     )
@@ -168,7 +180,6 @@ class AlarmScheduler(private val context: Context) {
                         PluriWaveAlarmReceiver.EXTRA_OCCURRENCE_AT,
                         spec.snoozeOriginMillis ?: spec.triggerAtMillis
                     )
-                    putExtra(EXTRA_PRE_NOTICE_TEMPLATE, spec.preNoticeTemplate)
                 }
             )
             Log.d(tag, "alarm.schedule preNotice immediate id=${spec.id}")
@@ -231,6 +242,12 @@ class AlarmScheduler(private val context: Context) {
 
     fun onAlarmFired(id: String) {
         val spec = readSpec(id) ?: return
+        // The alarm is ringing now: tear down any snooze countdown so its
+        // notification and pending minute ticks don't outlive the ring.
+        cancelSnoozeCountdown(id)
+        NotificationManagerCompat.from(appContext).cancel(
+            PluriWaveAlarmReceiver.notificationIdForAlarm(id)
+        )
         val firedAt = spec.snoozeOriginMillis ?: spec.triggerAtMillis
         saveHandledOccurrence(id, firedAt)
         val next = spec.copy(
@@ -315,6 +332,225 @@ class AlarmScheduler(private val context: Context) {
         return occurrenceAt
     }
 
+    /**
+     * Re-snoozes an already-snoozed alarm by [minutes] more from NOW (anchored
+     * to now, unlike [snooze]/[postponeNext] which anchor to the occurrence).
+     * Invoked from the "snooze again" action on the countdown notification.
+     * Returns the new snooze so the caller can report it back to Flutter.
+     */
+    fun snoozeAgain(id: String, minutes: Int): NativeSnoozeResult? {
+        val spec = readSpec(id) ?: return null
+        val safeMinutes = sanitizeSnoozeMinutes(minutes)
+        val now = System.currentTimeMillis()
+        val snoozeUntil = now + safeMinutes * 60_000L
+        Log.d(tag, "alarm.snoozeAgain id=$id minutes=$safeMinutes until=$snoozeUntil")
+        scheduleSpec(
+            spec.copy(
+                snoozeUntilMillis = snoozeUntil,
+                snoozeOriginMillis = now,
+                snoozeMinutes = safeMinutes
+            ),
+            persistOnSuccess = true
+        )
+        return NativeSnoozeResult(
+            snoozeUntilMillis = snoozeUntil,
+            occurrenceAtMillis = now,
+            title = spec.title
+        )
+    }
+
+    /**
+     * Cancels an active snooze ("stop" from the countdown notification): drops
+     * the pending ring, advances to the next normal occurrence (or cancels a
+     * one-shot) and records the occurrence as handled so the Flutter cold-start
+     * sync reconciles the cleared snooze. Returns the occurrence consumed, or
+     * null if the spec is gone.
+     */
+    fun cancelSnooze(id: String): Long? {
+        val spec = readSpec(id) ?: return null
+        val snoozeUntil = spec.snoozeUntilMillis ?: return null
+        val occurrence = spec.snoozeOriginMillis ?: spec.triggerAtMillis
+        // handledAt must be >= the snooze ring time so Flutter's occurrence sync
+        // does not treat the still-future snooze as pending and advances past it.
+        val handledAt = maxOf(occurrence, snoozeUntil)
+        Log.d(tag, "alarm.cancelSnooze id=$id occurrence=$occurrence handledAt=$handledAt")
+        cancelSnoozeCountdown(id)
+        NotificationManagerCompat.from(appContext).cancel(
+            PluriWaveAlarmReceiver.notificationIdForAlarm(id)
+        )
+        saveHandledOccurrence(id, handledAt)
+        val next = spec.copy(
+            snoozeUntilMillis = null,
+            snoozeOriginMillis = null,
+            lastHandledAtMillis = handledAt,
+            enabled = spec.scheduleType != SCHEDULE_UNICA
+        )
+        if (next.enabled) {
+            scheduleSpec(next, persistOnSuccess = true)
+        } else {
+            removeScheduledAlarm(id)
+            cancelPending("fire", pendingFireIntent(id, PendingIntent.FLAG_NO_CREATE))
+            cancelPending("show", pendingShowIntent(id, PendingIntent.FLAG_NO_CREATE))
+        }
+        return occurrence
+    }
+
+    /**
+     * Re-posts the snooze countdown notification with the up-to-date remaining
+     * minutes and arms the next minute tick. Driven by ACTION_SNOOZE_COUNTDOWN
+     * alarms (so it keeps decrementing while the engine is dead).
+     */
+    fun handleSnoozeCountdownTick(id: String) {
+        val spec = readSpec(id)
+        val snoozeUntil = spec?.snoozeUntilMillis
+        if (spec == null || snoozeUntil == null) {
+            cancelSnoozeCountdown(id)
+            return
+        }
+        val now = System.currentTimeMillis()
+        if (snoozeUntil <= now) {
+            // The ring is due; the fire broadcast posts the alarm UI and
+            // onAlarmFired clears this notification.
+            cancelSnoozeCountdown(id)
+            return
+        }
+        val remaining = ceilMinutes(snoozeUntil - now)
+        postSnoozeCountdownNotification(spec, remaining)
+        armNextSnoozeCountdownTick(spec, remaining)
+    }
+
+    private fun scheduleSnoozeCountdown(spec: NativeAlarmSpec) {
+        val snoozeUntil = spec.snoozeUntilMillis ?: return
+        val now = System.currentTimeMillis()
+        if (snoozeUntil <= now) {
+            cancelSnoozeCountdown(spec.id)
+            return
+        }
+        val remaining = ceilMinutes(snoozeUntil - now)
+        postSnoozeCountdownNotification(spec, remaining)
+        armNextSnoozeCountdownTick(spec, remaining)
+        Log.d(tag, "alarm.snoozeCountdown started id=${spec.id} remaining=$remaining until=$snoozeUntil")
+    }
+
+    private fun armNextSnoozeCountdownTick(spec: NativeAlarmSpec, remaining: Long) {
+        val snoozeUntil = spec.snoozeUntilMillis ?: return
+        // On the final minute the fire alarm takes over and cancels the
+        // countdown, so there is no further tick to schedule.
+        if (remaining <= 1L) return
+        val nextBoundary = snoozeUntil - (remaining - 1L) * 60_000L
+        val pending = PendingIntent.getBroadcast(
+            appContext,
+            requestCode(spec.id, 8),
+            Intent(appContext, PluriWaveAlarmReceiver::class.java).apply {
+                action = PluriWaveAlarmReceiver.ACTION_SNOOZE_COUNTDOWN
+                putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_ID, spec.id)
+            },
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+        try {
+            alarmManager.setExactAndAllowWhileIdle(
+                AlarmManager.RTC_WAKEUP,
+                nextBoundary,
+                pending
+            )
+            Log.d(tag, "alarm.snoozeCountdown next tick id=${spec.id} at=$nextBoundary")
+        } catch (error: SecurityException) {
+            Log.w(tag, "alarm.snoozeCountdown tick SecurityException id=${spec.id}", error)
+        }
+    }
+
+    private fun cancelSnoozeCountdown(id: String) {
+        val pending = PendingIntent.getBroadcast(
+            appContext,
+            requestCode(id, 8),
+            Intent(appContext, PluriWaveAlarmReceiver::class.java).apply {
+                action = PluriWaveAlarmReceiver.ACTION_SNOOZE_COUNTDOWN
+            },
+            PendingIntent.FLAG_NO_CREATE or PendingIntent.FLAG_IMMUTABLE
+        )
+        cancelPending("snoozeCountdown", pending)
+    }
+
+    private fun postSnoozeCountdownNotification(spec: NativeAlarmSpec, remaining: Long) {
+        ensurePreNoticeChannel()
+        val text = AlarmNotificationStrings.snoozeCountdownText(appContext, remaining)
+
+        val openIntent = PendingIntent.getActivity(
+            appContext,
+            requestCode(spec.id, 5),
+            Intent(appContext, MainActivity::class.java).apply {
+                this.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
+                putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_ID, spec.id)
+                putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_TITLE, spec.title)
+            },
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+        val againIntent = PendingIntent.getBroadcast(
+            appContext,
+            requestCode(spec.id, 6),
+            Intent(appContext, PluriWaveAlarmReceiver::class.java).apply {
+                action = PluriWaveAlarmReceiver.ACTION_SNOOZE_AGAIN
+                putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_ID, spec.id)
+                putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_TITLE, spec.title)
+                putExtra(PluriWaveAlarmReceiver.EXTRA_SNOOZE_MINUTES, spec.snoozeMinutes)
+            },
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+        val stopIntent = PendingIntent.getBroadcast(
+            appContext,
+            requestCode(spec.id, 7),
+            Intent(appContext, PluriWaveAlarmReceiver::class.java).apply {
+                action = PluriWaveAlarmReceiver.ACTION_CANCEL_SNOOZE
+                putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_ID, spec.id)
+                putExtra(PluriWaveAlarmReceiver.EXTRA_ALARM_TITLE, spec.title)
+            },
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+
+        val notification = NotificationCompat.Builder(appContext, PluriWaveAlarmReceiver.CHANNEL_ID)
+            .setSmallIcon(android.R.drawable.ic_lock_idle_alarm)
+            .setContentTitle(spec.title)
+            .setContentText(text)
+            .setPriority(NotificationCompat.PRIORITY_LOW)
+            .setCategory(NotificationCompat.CATEGORY_REMINDER)
+            .setSilent(true)
+            .setOnlyAlertOnce(true)
+            .setOngoing(true)
+            .setContentIntent(openIntent)
+            .addAction(0, AlarmNotificationStrings.snoozeAgainLabel(appContext), againIntent)
+            .addAction(0, AlarmNotificationStrings.stopLabel(appContext), stopIntent)
+            .build()
+
+        try {
+            NotificationManagerCompat.from(appContext).notify(
+                PluriWaveAlarmReceiver.notificationIdForAlarm(spec.id),
+                notification
+            )
+        } catch (error: SecurityException) {
+            Log.e(tag, "alarm.snoozeCountdown notify SecurityException id=${spec.id}", error)
+        }
+    }
+
+    private fun ensurePreNoticeChannel() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return
+        val manager = appContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        // Re-create each time so the localized name/description refresh after a
+        // locale change (Android updates them on an existing channel).
+        val channel = NotificationChannel(
+            PluriWaveAlarmReceiver.CHANNEL_ID,
+            AlarmNotificationStrings.preNoticeChannelName(appContext),
+            NotificationManager.IMPORTANCE_LOW
+        ).apply {
+            description = AlarmNotificationStrings.preNoticeChannelDescription(appContext)
+            setSound(null, null)
+            enableVibration(false)
+        }
+        manager.createNotificationChannel(channel)
+    }
+
+    private fun ceilMinutes(deltaMillis: Long): Long =
+        maxOf(1L, (deltaMillis + 59_999L) / 60_000L)
+
     fun cancelAlarm(id: String) {
         Log.d(tag, "alarm.cancel id=$id")
         removeScheduledAlarm(id)
@@ -322,6 +558,7 @@ class AlarmScheduler(private val context: Context) {
         cancelPending("fire", pendingFireIntent(id, PendingIntent.FLAG_NO_CREATE))
         cancelPending("show", pendingShowIntent(id, PendingIntent.FLAG_NO_CREATE))
         cancelPending("preNotice", pendingPreNoticeIntent(id, PendingIntent.FLAG_NO_CREATE))
+        cancelSnoozeCountdown(id)
         NotificationManagerCompat.from(appContext).cancel(
             PluriWaveAlarmReceiver.notificationIdForAlarm(id)
         )
@@ -656,10 +893,7 @@ class AlarmScheduler(private val context: Context) {
         val fallbackSound: String?,
         val volume: Float,
         val fadeInSegundos: Int = 0,
-        val timezoneId: String,
-        // Nullable for backward compat: old persisted alarms without this field
-        // fall back to the English default in the receiver. Schema stays v3.
-        val preNoticeTemplate: String? = null
+        val timezoneId: String
     ) {
         fun toJson(): JSONObject = JSONObject().apply {
             put("schemaVersion", 3)
@@ -686,7 +920,6 @@ class AlarmScheduler(private val context: Context) {
             put("volume", volume)
             put("fadeInSegundos", fadeInSegundos)
             put("timezoneId", timezoneId)
-            put("preNoticeTemplate", preNoticeTemplate)
         }
 
         companion object {
@@ -723,8 +956,7 @@ class AlarmScheduler(private val context: Context) {
                     fallbackSound = json.optString("fallbackSound").takeIf { it.isNotBlank() },
                     volume = json.optDouble("volume", 0.85).toFloat(),
                     fadeInSegundos = json.optInt("fadeInSegundos", 0).coerceIn(0, 60),
-                    timezoneId = json.optString("timezoneId", TimeZone.getDefault().id),
-                    preNoticeTemplate = json.optString("preNoticeTemplate").takeIf { it.isNotBlank() }
+                    timezoneId = json.optString("timezoneId", TimeZone.getDefault().id)
                 )
             }
         }
@@ -739,9 +971,6 @@ class AlarmScheduler(private val context: Context) {
         private const val PRE_NOTICE_MILLIS = 30 * 60 * 1000L
         private const val SCHEDULE_UNICA = "unica"
         private const val SCHEDULE_DIAS_SEMANA = "diasSemana"
-        // Intent extra key for the localized pre-notice template string.
-        // Declared once here; PluriWaveAlarmReceiver reads it via this constant.
-        const val EXTRA_PRE_NOTICE_TEMPLATE = "preNoticeTemplate"
     }
 }
 

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

@@ -115,8 +115,7 @@ class MainActivity : AudioServiceActivity() {
                             snoozeMinutes = call.argument<Int>("snoozeMinutes") ?: 5,
                             fallbackStationName = call.argument<String>("fallbackStationName"),
                             fallbackStationUrl = call.argument<String>("fallbackStationUrl"),
-                            fadeInSegundos = call.argument<Int>("fadeInSegundos") ?: 0,
-                            preNoticeTemplate = call.argument<String>("preNoticeTemplate")
+                            fadeInSegundos = call.argument<Int>("fadeInSegundos") ?: 0
                         )
                         result.success(scheduled)
                     }
@@ -206,6 +205,16 @@ class MainActivity : AudioServiceActivity() {
                     Log.d(tag, "alarm.channel getNativeSnoozeState")
                     result.success(alarmScheduler.nativeSnoozeStates())
                 }
+                "setNotificationStrings" -> {
+                    val args = call.arguments as? Map<*, *>
+                    if (args != null) {
+                        AlarmNotificationStrings.save(
+                            this,
+                            args.entries.associate { (k, v) -> k.toString() to v }
+                        )
+                    }
+                    result.success(null)
+                }
                 else -> result.notImplemented()
             }
         }
@@ -424,7 +433,9 @@ class MainActivity : AudioServiceActivity() {
 
         for (intent in candidates) {
             try {
-                startActivity(Intent.createChooser(intent, "Abrir carpeta"))
+                startActivity(
+                    Intent.createChooser(intent, AlarmNotificationStrings.openFolderTitle(this))
+                )
                 Log.d(tag, "file_actions.viewDirectory launched path=$path")
                 return true
             } catch (_: ActivityNotFoundException) {
@@ -468,7 +479,9 @@ class MainActivity : AudioServiceActivity() {
                 clipData = ClipData.newUri(contentResolver, "recording", uri)
                 addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
             }
-            startActivity(Intent.createChooser(intent, "Abrir grabación"))
+            startActivity(
+                Intent.createChooser(intent, AlarmNotificationStrings.openRecordingTitle(this))
+            )
             Log.d(tag, "file_actions.openFile launched path=$path")
             true
         } catch (_: ActivityNotFoundException) {
@@ -767,6 +780,9 @@ class MainActivity : AudioServiceActivity() {
         /** alarmAction reported when the native service snoozed by itself. */
         const val ALARM_ACTION_SNOOZED = "snoozed"
 
+        /** alarmAction reported when a pending snooze was cancelled natively. */
+        const val ALARM_ACTION_SNOOZE_CANCELLED = "snoozeCancelled"
+
         @Volatile
         private var activeInstance: MainActivity? = null
 

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

@@ -51,8 +51,7 @@ class PluriWaveAlarmReceiver : BroadcastReceiver() {
                     title,
                     snoozeMinutes,
                     intent.getLongExtra(EXTRA_TRIGGER_AT, 0L),
-                    intent.getLongExtra(EXTRA_OCCURRENCE_AT, 0L),
-                    intent.getStringExtra(AlarmScheduler.EXTRA_PRE_NOTICE_TEMPLATE)
+                    intent.getLongExtra(EXTRA_OCCURRENCE_AT, 0L)
                 )
             }
             ACTION_POSTPONE_NEXT -> {
@@ -91,6 +90,40 @@ class PluriWaveAlarmReceiver : BroadcastReceiver() {
                     Log.e(TAG, "alarm.receiver skipNext startActivity ERROR id=$alarmId", error)
                 }
             }
+            ACTION_SNOOZE_COUNTDOWN -> {
+                AlarmScheduler(context).handleSnoozeCountdownTick(alarmId)
+            }
+            ACTION_SNOOZE_AGAIN -> {
+                val snoozed = AlarmScheduler(context).snoozeAgain(alarmId, snoozeMinutes)
+                if (snoozed != null) {
+                    // Reuses the existing native-snooze event so Flutter records
+                    // the new snooze (live) and the cold-start sync imports it.
+                    MainActivity.notifyAlarmEvent(
+                        mapOf(
+                            "alarmId" to alarmId,
+                            "alarmTitle" to snoozed.title,
+                            "alarmAction" to MainActivity.ALARM_ACTION_SNOOZED,
+                            "occurrenceAtMillis" to snoozed.occurrenceAtMillis,
+                            "snoozeUntilMillis" to snoozed.snoozeUntilMillis,
+                            "snoozeMinutes" to snoozeMinutes
+                        )
+                    )
+                }
+            }
+            ACTION_CANCEL_SNOOZE -> {
+                val occurrence = AlarmScheduler(context).cancelSnooze(alarmId)
+                NotificationManagerCompat.from(context).cancel(notificationIdForAlarm(alarmId))
+                if (occurrence != null) {
+                    MainActivity.notifyAlarmEvent(
+                        mapOf(
+                            "alarmId" to alarmId,
+                            "alarmTitle" to title,
+                            "alarmAction" to MainActivity.ALARM_ACTION_SNOOZE_CANCELLED,
+                            "occurrenceAtMillis" to occurrence
+                        )
+                    )
+                }
+            }
             else -> Log.w(TAG, "alarm.receiver unknown action=${intent.action} id=$alarmId")
         }
     }
@@ -101,13 +134,12 @@ class PluriWaveAlarmReceiver : BroadcastReceiver() {
         title: String,
         snoozeMinutes: Int,
         triggerAtMillis: Long,
-        occurrenceAtMillis: Long,
-        preNoticeTemplate: String? = null
+        occurrenceAtMillis: Long
     ) {
         ensureChannel(context)
 
         val remaining = computeRemainingMinutes(triggerAtMillis)
-        val contentText = formatPreNoticeText(preNoticeTemplate, remaining)
+        val contentText = AlarmNotificationStrings.preNoticeText(context, remaining)
 
         val openAppIntent = PendingIntent.getActivity(
             context,
@@ -155,8 +187,8 @@ class PluriWaveAlarmReceiver : BroadcastReceiver() {
             .setSilent(true)
             .setAutoCancel(true)
             .setContentIntent(openAppIntent)
-            .addAction(0, "Posponer", postponeNextIntent)
-            .addAction(0, "Omitir esta vez", skipNextIntent)
+            .addAction(0, AlarmNotificationStrings.snoozeLabel(context), postponeNextIntent)
+            .addAction(0, AlarmNotificationStrings.skipLabel(context), skipNextIntent)
             .build()
 
         try {
@@ -174,30 +206,17 @@ class PluriWaveAlarmReceiver : BroadcastReceiver() {
     private fun computeRemainingMinutes(triggerAtMillis: Long): Long =
         maxOf(1L, (triggerAtMillis - System.currentTimeMillis()) / 60_000L)
 
-    /**
-     * Formats the pre-notice notification text by replacing the `{minutes}`
-     * placeholder in [template] with [remaining]. Falls back to an English
-     * default if [template] is null or blank.
-     */
-    private fun formatPreNoticeText(template: String?, remaining: Long): String {
-        if (template.isNullOrBlank()) {
-            return "Starts in $remaining min"
-        }
-        return template.replace("{minutes}", remaining.toString())
-    }
-
     private fun ensureChannel(context: Context) {
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return
         val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
-        val existing = manager.getNotificationChannel(CHANNEL_ID)
-        if (existing != null) return
-
+        // Re-create each time so the localized name/description refresh after a
+        // locale change (Android updates them on an existing channel).
         val channel = NotificationChannel(
             CHANNEL_ID,
-            "Preavisos de alarmas",
+            AlarmNotificationStrings.preNoticeChannelName(context),
             NotificationManager.IMPORTANCE_LOW
         ).apply {
-            description = "Notificaciones silenciosas 30 minutos antes de la alarma"
+            description = AlarmNotificationStrings.preNoticeChannelDescription(context)
             setSound(null, null)
             enableVibration(false)
         }
@@ -216,6 +235,9 @@ class PluriWaveAlarmReceiver : BroadcastReceiver() {
         const val ACTION_PRE_NOTICE = "es.freetimelab.pluriwave.alarm.PRE_NOTICE"
         const val ACTION_SKIP_NEXT = "es.freetimelab.pluriwave.alarm.SKIP_NEXT"
         const val ACTION_POSTPONE_NEXT = "es.freetimelab.pluriwave.alarm.POSTPONE_NEXT"
+        const val ACTION_SNOOZE_COUNTDOWN = "es.freetimelab.pluriwave.alarm.SNOOZE_COUNTDOWN"
+        const val ACTION_SNOOZE_AGAIN = "es.freetimelab.pluriwave.alarm.SNOOZE_AGAIN"
+        const val ACTION_CANCEL_SNOOZE = "es.freetimelab.pluriwave.alarm.CANCEL_SNOOZE"
         const val EXTRA_ALARM_ID = "alarmId"
         const val EXTRA_ALARM_TITLE = "alarmTitle"
         const val EXTRA_ALARM_ACTION = "alarmAction"

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

@@ -388,7 +388,7 @@ class PluriWaveAlarmService : Service() {
     ) =
         NotificationCompat.Builder(this, CHANNEL_ID)
             .setSmallIcon(android.R.drawable.ic_lock_idle_alarm)
-            .setContentTitle("Alarma PluriWave")
+            .setContentTitle(AlarmNotificationStrings.ringTitle(this))
             .setContentText(
                 if (stationName.isNullOrBlank()) title else "$title - $stationName"
             )
@@ -399,8 +399,8 @@ class PluriWaveAlarmService : Service() {
             .setAutoCancel(false)
             .setFullScreenIntent(openAlarmPendingIntent(alarmId, title, snoozeMinutes), true)
             .setContentIntent(openAlarmPendingIntent(alarmId, title, snoozeMinutes))
-            .addAction(0, "Posponer", snoozePendingIntent(alarmId, snoozeMinutes))
-            .addAction(0, "Detener", stopPendingIntent(alarmId))
+            .addAction(0, AlarmNotificationStrings.snoozeLabel(this), snoozePendingIntent(alarmId, snoozeMinutes))
+            .addAction(0, AlarmNotificationStrings.stopLabel(this), stopPendingIntent(alarmId))
             .build()
 
     private fun openAlarmPendingIntent(
@@ -553,13 +553,16 @@ class PluriWaveAlarmService : Service() {
             if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return
             val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
             migrateLegacyChannels(context, manager)
-            if (manager.getNotificationChannel(CHANNEL_ID) != null) return
+            // Re-create each time (not early-returning when present) so the
+            // localized name/description refresh after a locale change. Android
+            // updates name + description on an existing channel; importance and
+            // sound stay fixed from first creation.
             val channel = NotificationChannel(
                 CHANNEL_ID,
-                "Alarmas sonando",
+                AlarmNotificationStrings.fireChannelName(context),
                 NotificationManager.IMPORTANCE_HIGH
             ).apply {
-                description = "Sonido y pantalla urgente cuando una alarma musical debe sonar"
+                description = AlarmNotificationStrings.fireChannelDescription(context)
                 enableVibration(true)
                 setSound(
                     Settings.System.DEFAULT_ALARM_ALERT_URI,

lib/estado/estado_alarmas.dart

@@ -281,6 +281,10 @@ class EstadoAlarmas extends ChangeNotifier {
   /// The native scheduler already re-registered setAlarmClock, so this only
   /// persists the canonical state — it MUST NOT call android.programar again.
   Future<void> _alRecibirEventoNativo(EventoAlarmaAndroid evento) async {
+    if (evento.accion == EventoAlarmaAndroid.accionSnoozeCancelled) {
+      await _registrarCancelacionSnoozeNativa(evento);
+      return;
+    }
     if (evento.accion != EventoAlarmaAndroid.accionSnoozed) return;
     if (evento.alarmaId.isEmpty || evento.snoozeUntilMillis <= 0) return;
     final hasta = DateTime.fromMillisecondsSinceEpoch(evento.snoozeUntilMillis);
@@ -304,6 +308,30 @@ class EstadoAlarmas extends ChangeNotifier {
     }
   }
 
+  /// Mirrors a native snooze cancellation ("Detener" on the countdown
+  /// notification). The native scheduler already advanced to the next normal
+  /// occurrence, so this only clears the snooze in the canonical config and
+  /// MUST NOT call android.programar again (would double-schedule).
+  Future<void> _registrarCancelacionSnoozeNativa(
+    EventoAlarmaAndroid evento,
+  ) async {
+    if (evento.alarmaId.isEmpty) return;
+    final origen =
+        evento.occurrenceAtMillis > 0
+            ? DateTime.fromMillisecondsSinceEpoch(evento.occurrenceAtMillis)
+            : DateTime.now();
+    debugPrint(
+      '[PluriWave][alarmas] snooze cancelado nativo id=${evento.alarmaId} origen=${origen.toIso8601String()}',
+    );
+    try {
+      final config = await servicio.completarEjecucion(evento.alarmaId, origen);
+      _aplicar(config);
+      notifyListeners();
+    } catch (e) {
+      debugPrint('[PluriWave][alarmas] cancelar snooze nativo ERROR $e');
+    }
+  }
+
   Future<void> _sincronizarEjecucionesGestionadasPorAndroid() async {
     try {
       final ejecuciones = await android.obtenerEjecucionesNativasGestionadas();

lib/l10n/app_ar.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "يبدأ خلال {minutes} دقيقة",
+  "snoozeCountdown": "يرنّ خلال {minutes} دقيقة",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "غفوة مرة أخرى",
+  "alarmRingingNotificationTitle": "منبّه PluriWave",
+  "alarmFireChannelName": "المنبّهات الرنّانة",
+  "alarmFireChannelDescription": "صوت وشاشة عاجلة عندما يجب أن يرنّ منبّه موسيقي",
+  "alarmPreNoticeChannelName": "تنبيهات المنبّهات",
+  "alarmPreNoticeChannelDescription": "إشعارات صامتة قبل المنبّه",
+  "openFolderChooserTitle": "فتح المجلد",
+  "openRecordingChooserTitle": "فتح التسجيل",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_bn.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "{minutes} মিনিটে শুরু হবে",
+  "snoozeCountdown": "{minutes} মিনিটে বাজবে",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "আবার স্নুজ করুন",
+  "alarmRingingNotificationTitle": "PluriWave অ্যালার্ম",
+  "alarmFireChannelName": "বাজতে থাকা অ্যালার্ম",
+  "alarmFireChannelDescription": "কোনো মিউজিক অ্যালার্ম বাজার সময় জরুরি শব্দ ও স্ক্রিন",
+  "alarmPreNoticeChannelName": "অ্যালার্ম রিমাইন্ডার",
+  "alarmPreNoticeChannelDescription": "অ্যালার্মের আগে নীরব বিজ্ঞপ্তি",
+  "openFolderChooserTitle": "ফোল্ডার খুলুন",
+  "openRecordingChooserTitle": "রেকর্ডিং খুলুন",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_de.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "Startet in {minutes} Min.",
+  "snoozeCountdown": "Klingelt in {minutes} Min.",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "Erneut schlummern",
+  "alarmRingingNotificationTitle": "PluriWave-Wecker",
+  "alarmFireChannelName": "Klingelnde Wecker",
+  "alarmFireChannelDescription": "Dringender Ton und Bildschirm, wenn ein Musikwecker klingeln soll",
+  "alarmPreNoticeChannelName": "Wecker-Vorankündigungen",
+  "alarmPreNoticeChannelDescription": "Lautlose Benachrichtigungen vor dem Wecker",
+  "openFolderChooserTitle": "Ordner öffnen",
+  "openRecordingChooserTitle": "Aufnahme öffnen",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_en.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "Starts in {minutes} min",
+  "snoozeCountdown": "Rings in {minutes} min",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "Snooze again",
+  "alarmRingingNotificationTitle": "PluriWave alarm",
+  "alarmFireChannelName": "Ringing alarms",
+  "alarmFireChannelDescription": "Urgent sound and screen when a music alarm must ring",
+  "alarmPreNoticeChannelName": "Alarm reminders",
+  "alarmPreNoticeChannelDescription": "Silent notifications before the alarm",
+  "openFolderChooserTitle": "Open folder",
+  "openRecordingChooserTitle": "Open recording",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_es.arb

@@ -592,6 +592,22 @@
     }
   },
   "preNoticeCountdown": "Empieza en {minutes} min",
+  "snoozeCountdown": "Suena en {minutes} min",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "Posponer otra vez",
+  "alarmRingingNotificationTitle": "Alarma PluriWave",
+  "alarmFireChannelName": "Alarmas sonando",
+  "alarmFireChannelDescription": "Sonido y pantalla urgente cuando una alarma musical debe sonar",
+  "alarmPreNoticeChannelName": "Preavisos de alarmas",
+  "alarmPreNoticeChannelDescription": "Notificaciones silenciosas antes de la alarma",
+  "openFolderChooserTitle": "Abrir carpeta",
+  "openRecordingChooserTitle": "Abrir grabación",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_fr.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "Démarre dans {minutes} min",
+  "snoozeCountdown": "Sonne dans {minutes} min",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "Reporter encore",
+  "alarmRingingNotificationTitle": "Alarme PluriWave",
+  "alarmFireChannelName": "Alarmes en cours",
+  "alarmFireChannelDescription": "Son et écran urgents lorsqu'une alarme musicale doit sonner",
+  "alarmPreNoticeChannelName": "Rappels d'alarme",
+  "alarmPreNoticeChannelDescription": "Notifications silencieuses avant l'alarme",
+  "openFolderChooserTitle": "Ouvrir le dossier",
+  "openRecordingChooserTitle": "Ouvrir l'enregistrement",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_hi.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "{minutes} मिनट में शुरू होगा",
+  "snoozeCountdown": "{minutes} मिनट में बजेगा",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "फिर से स्नूज़ करें",
+  "alarmRingingNotificationTitle": "PluriWave अलार्म",
+  "alarmFireChannelName": "बजते अलार्म",
+  "alarmFireChannelDescription": "जब कोई संगीत अलार्म बजना हो तो तत्काल ध्वनि और स्क्रीन",
+  "alarmPreNoticeChannelName": "अलार्म रिमाइंडर",
+  "alarmPreNoticeChannelDescription": "अलार्म से पहले मूक सूचनाएँ",
+  "openFolderChooserTitle": "फ़ोल्डर खोलें",
+  "openRecordingChooserTitle": "रिकॉर्डिंग खोलें",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_id.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "Mulai dalam {minutes} menit",
+  "snoozeCountdown": "Berbunyi dalam {minutes} mnt",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "Tunda lagi",
+  "alarmRingingNotificationTitle": "Alarm PluriWave",
+  "alarmFireChannelName": "Alarm berbunyi",
+  "alarmFireChannelDescription": "Suara dan layar mendesak saat alarm musik harus berbunyi",
+  "alarmPreNoticeChannelName": "Pengingat alarm",
+  "alarmPreNoticeChannelDescription": "Notifikasi senyap sebelum alarm",
+  "openFolderChooserTitle": "Buka folder",
+  "openRecordingChooserTitle": "Buka rekaman",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_it.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "Inizia tra {minutes} min",
+  "snoozeCountdown": "Suona tra {minutes} min",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "Posponi di nuovo",
+  "alarmRingingNotificationTitle": "Sveglia PluriWave",
+  "alarmFireChannelName": "Sveglie in corso",
+  "alarmFireChannelDescription": "Suono e schermo urgenti quando una sveglia musicale deve suonare",
+  "alarmPreNoticeChannelName": "Promemoria sveglia",
+  "alarmPreNoticeChannelDescription": "Notifiche silenziose prima della sveglia",
+  "openFolderChooserTitle": "Apri cartella",
+  "openRecordingChooserTitle": "Apri registrazione",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_ja.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "{minutes}分後に開始",
+  "snoozeCountdown": "{minutes}分後に鳴ります",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "もう一度スヌーズ",
+  "alarmRingingNotificationTitle": "PluriWave アラーム",
+  "alarmFireChannelName": "鳴っているアラーム",
+  "alarmFireChannelDescription": "音楽アラームが鳴るときの緊急の音と画面",
+  "alarmPreNoticeChannelName": "アラームの事前通知",
+  "alarmPreNoticeChannelDescription": "アラーム前のサイレント通知",
+  "openFolderChooserTitle": "フォルダを開く",
+  "openRecordingChooserTitle": "録音を開く",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_pt.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "Começa em {minutes} min",
+  "snoozeCountdown": "Toca em {minutes} min",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "Adiar novamente",
+  "alarmRingingNotificationTitle": "Alarme PluriWave",
+  "alarmFireChannelName": "Alarmes tocando",
+  "alarmFireChannelDescription": "Som e tela urgentes quando um alarme musical deve tocar",
+  "alarmPreNoticeChannelName": "Avisos de alarme",
+  "alarmPreNoticeChannelDescription": "Notificações silenciosas antes do alarme",
+  "openFolderChooserTitle": "Abrir pasta",
+  "openRecordingChooserTitle": "Abrir gravação",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_ru.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "Начнётся через {minutes} мин",
+  "snoozeCountdown": "Прозвонит через {minutes} мин",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "Отложить снова",
+  "alarmRingingNotificationTitle": "Будильник PluriWave",
+  "alarmFireChannelName": "Звонящие будильники",
+  "alarmFireChannelDescription": "Срочный звук и экран, когда должен сработать музыкальный будильник",
+  "alarmPreNoticeChannelName": "Напоминания о будильнике",
+  "alarmPreNoticeChannelDescription": "Беззвучные уведомления перед будильником",
+  "openFolderChooserTitle": "Открыть папку",
+  "openRecordingChooserTitle": "Открыть запись",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/app_zh.arb

@@ -629,6 +629,22 @@
     }
   },
   "preNoticeCountdown": "{minutes}分钟后开始",
+  "snoozeCountdown": "{minutes}分钟后响铃",
+  "@snoozeCountdown": {
+    "placeholders": {
+      "minutes": {
+        "type": "int"
+      }
+    }
+  },
+  "snoozeAgainAction": "再次小睡",
+  "alarmRingingNotificationTitle": "PluriWave 闹钟",
+  "alarmFireChannelName": "响铃的闹钟",
+  "alarmFireChannelDescription": "音乐闹钟需要响起时的紧急声音和屏幕",
+  "alarmPreNoticeChannelName": "闹钟预告",
+  "alarmPreNoticeChannelDescription": "闹钟前的静音通知",
+  "openFolderChooserTitle": "打开文件夹",
+  "openRecordingChooserTitle": "打开录音",
   "@preNoticeCountdown": {
     "placeholders": {
       "minutes": {

lib/l10n/gen/app_localizations.dart

@@ -2312,6 +2312,60 @@ abstract class AppLocalizations {
   /// **'Empieza en {minutes} min'**
   String preNoticeCountdown(int minutes);
 
+  /// No description provided for @snoozeCountdown.
+  ///
+  /// In es, this message translates to:
+  /// **'Suena en {minutes} min'**
+  String snoozeCountdown(int minutes);
+
+  /// No description provided for @snoozeAgainAction.
+  ///
+  /// In es, this message translates to:
+  /// **'Posponer otra vez'**
+  String get snoozeAgainAction;
+
+  /// No description provided for @alarmRingingNotificationTitle.
+  ///
+  /// In es, this message translates to:
+  /// **'Alarma PluriWave'**
+  String get alarmRingingNotificationTitle;
+
+  /// No description provided for @alarmFireChannelName.
+  ///
+  /// In es, this message translates to:
+  /// **'Alarmas sonando'**
+  String get alarmFireChannelName;
+
+  /// No description provided for @alarmFireChannelDescription.
+  ///
+  /// In es, this message translates to:
+  /// **'Sonido y pantalla urgente cuando una alarma musical debe sonar'**
+  String get alarmFireChannelDescription;
+
+  /// No description provided for @alarmPreNoticeChannelName.
+  ///
+  /// In es, this message translates to:
+  /// **'Preavisos de alarmas'**
+  String get alarmPreNoticeChannelName;
+
+  /// No description provided for @alarmPreNoticeChannelDescription.
+  ///
+  /// In es, this message translates to:
+  /// **'Notificaciones silenciosas antes de la alarma'**
+  String get alarmPreNoticeChannelDescription;
+
+  /// No description provided for @openFolderChooserTitle.
+  ///
+  /// In es, this message translates to:
+  /// **'Abrir carpeta'**
+  String get openFolderChooserTitle;
+
+  /// No description provided for @openRecordingChooserTitle.
+  ///
+  /// In es, this message translates to:
+  /// **'Abrir grabación'**
+  String get openRecordingChooserTitle;
+
   /// No description provided for @eqDeviceEditTitle.
   ///
   /// In es, this message translates to:

lib/l10n/gen/app_localizations_ar.dart

@@ -1253,6 +1253,36 @@ class AppLocalizationsAr extends AppLocalizations {
     return 'يبدأ خلال $minutes دقيقة';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return 'يرنّ خلال $minutes دقيقة';
+  }
+
+  @override
+  String get snoozeAgainAction => 'غفوة مرة أخرى';
+
+  @override
+  String get alarmRingingNotificationTitle => 'منبّه PluriWave';
+
+  @override
+  String get alarmFireChannelName => 'المنبّهات الرنّانة';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'صوت وشاشة عاجلة عندما يجب أن يرنّ منبّه موسيقي';
+
+  @override
+  String get alarmPreNoticeChannelName => 'تنبيهات المنبّهات';
+
+  @override
+  String get alarmPreNoticeChannelDescription => 'إشعارات صامتة قبل المنبّه';
+
+  @override
+  String get openFolderChooserTitle => 'فتح المجلد';
+
+  @override
+  String get openRecordingChooserTitle => 'فتح التسجيل';
+
   @override
   String get eqDeviceEditTitle => 'تعديل الجهاز';
 

lib/l10n/gen/app_localizations_bn.dart

@@ -1260,6 +1260,37 @@ class AppLocalizationsBn extends AppLocalizations {
     return '$minutes মিনিটে শুরু হবে';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return '$minutes মিনিটে বাজবে';
+  }
+
+  @override
+  String get snoozeAgainAction => 'আবার স্নুজ করুন';
+
+  @override
+  String get alarmRingingNotificationTitle => 'PluriWave অ্যালার্ম';
+
+  @override
+  String get alarmFireChannelName => 'বাজতে থাকা অ্যালার্ম';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'কোনো মিউজিক অ্যালার্ম বাজার সময় জরুরি শব্দ ও স্ক্রিন';
+
+  @override
+  String get alarmPreNoticeChannelName => 'অ্যালার্ম রিমাইন্ডার';
+
+  @override
+  String get alarmPreNoticeChannelDescription =>
+      'অ্যালার্মের আগে নীরব বিজ্ঞপ্তি';
+
+  @override
+  String get openFolderChooserTitle => 'ফোল্ডার খুলুন';
+
+  @override
+  String get openRecordingChooserTitle => 'রেকর্ডিং খুলুন';
+
   @override
   String get eqDeviceEditTitle => 'ডিভাইস সম্পাদনা করুন';
 

lib/l10n/gen/app_localizations_de.dart

@@ -1270,6 +1270,37 @@ class AppLocalizationsDe extends AppLocalizations {
     return 'Startet in $minutes Min.';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return 'Klingelt in $minutes Min.';
+  }
+
+  @override
+  String get snoozeAgainAction => 'Erneut schlummern';
+
+  @override
+  String get alarmRingingNotificationTitle => 'PluriWave-Wecker';
+
+  @override
+  String get alarmFireChannelName => 'Klingelnde Wecker';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'Dringender Ton und Bildschirm, wenn ein Musikwecker klingeln soll';
+
+  @override
+  String get alarmPreNoticeChannelName => 'Wecker-Vorankündigungen';
+
+  @override
+  String get alarmPreNoticeChannelDescription =>
+      'Lautlose Benachrichtigungen vor dem Wecker';
+
+  @override
+  String get openFolderChooserTitle => 'Ordner öffnen';
+
+  @override
+  String get openRecordingChooserTitle => 'Aufnahme öffnen';
+
   @override
   String get eqDeviceEditTitle => 'Gerät bearbeiten';
 

lib/l10n/gen/app_localizations_en.dart

@@ -1256,6 +1256,37 @@ class AppLocalizationsEn extends AppLocalizations {
     return 'Starts in $minutes min';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return 'Rings in $minutes min';
+  }
+
+  @override
+  String get snoozeAgainAction => 'Snooze again';
+
+  @override
+  String get alarmRingingNotificationTitle => 'PluriWave alarm';
+
+  @override
+  String get alarmFireChannelName => 'Ringing alarms';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'Urgent sound and screen when a music alarm must ring';
+
+  @override
+  String get alarmPreNoticeChannelName => 'Alarm reminders';
+
+  @override
+  String get alarmPreNoticeChannelDescription =>
+      'Silent notifications before the alarm';
+
+  @override
+  String get openFolderChooserTitle => 'Open folder';
+
+  @override
+  String get openRecordingChooserTitle => 'Open recording';
+
   @override
   String get eqDeviceEditTitle => 'Edit device';
 

lib/l10n/gen/app_localizations_es.dart

@@ -1265,6 +1265,37 @@ class AppLocalizationsEs extends AppLocalizations {
     return 'Empieza en $minutes min';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return 'Suena en $minutes min';
+  }
+
+  @override
+  String get snoozeAgainAction => 'Posponer otra vez';
+
+  @override
+  String get alarmRingingNotificationTitle => 'Alarma PluriWave';
+
+  @override
+  String get alarmFireChannelName => 'Alarmas sonando';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'Sonido y pantalla urgente cuando una alarma musical debe sonar';
+
+  @override
+  String get alarmPreNoticeChannelName => 'Preavisos de alarmas';
+
+  @override
+  String get alarmPreNoticeChannelDescription =>
+      'Notificaciones silenciosas antes de la alarma';
+
+  @override
+  String get openFolderChooserTitle => 'Abrir carpeta';
+
+  @override
+  String get openRecordingChooserTitle => 'Abrir grabación';
+
   @override
   String get eqDeviceEditTitle => 'Editar dispositivo';
 

lib/l10n/gen/app_localizations_fr.dart

@@ -1275,6 +1275,37 @@ class AppLocalizationsFr extends AppLocalizations {
     return 'Démarre dans $minutes min';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return 'Sonne dans $minutes min';
+  }
+
+  @override
+  String get snoozeAgainAction => 'Reporter encore';
+
+  @override
+  String get alarmRingingNotificationTitle => 'Alarme PluriWave';
+
+  @override
+  String get alarmFireChannelName => 'Alarmes en cours';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'Son et écran urgents lorsqu\'une alarme musicale doit sonner';
+
+  @override
+  String get alarmPreNoticeChannelName => 'Rappels d\'alarme';
+
+  @override
+  String get alarmPreNoticeChannelDescription =>
+      'Notifications silencieuses avant l\'alarme';
+
+  @override
+  String get openFolderChooserTitle => 'Ouvrir le dossier';
+
+  @override
+  String get openRecordingChooserTitle => 'Ouvrir l\'enregistrement';
+
   @override
   String get eqDeviceEditTitle => 'Modifier l\'appareil';
 

lib/l10n/gen/app_localizations_hi.dart

@@ -1259,6 +1259,36 @@ class AppLocalizationsHi extends AppLocalizations {
     return '$minutes मिनट में शुरू होगा';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return '$minutes मिनट में बजेगा';
+  }
+
+  @override
+  String get snoozeAgainAction => 'फिर से स्नूज़ करें';
+
+  @override
+  String get alarmRingingNotificationTitle => 'PluriWave अलार्म';
+
+  @override
+  String get alarmFireChannelName => 'बजते अलार्म';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'जब कोई संगीत अलार्म बजना हो तो तत्काल ध्वनि और स्क्रीन';
+
+  @override
+  String get alarmPreNoticeChannelName => 'अलार्म रिमाइंडर';
+
+  @override
+  String get alarmPreNoticeChannelDescription => 'अलार्म से पहले मूक सूचनाएँ';
+
+  @override
+  String get openFolderChooserTitle => 'फ़ोल्डर खोलें';
+
+  @override
+  String get openRecordingChooserTitle => 'रिकॉर्डिंग खोलें';
+
   @override
   String get eqDeviceEditTitle => 'डिवाइस संपादित करें';
 

lib/l10n/gen/app_localizations_id.dart

@@ -1264,6 +1264,37 @@ class AppLocalizationsId extends AppLocalizations {
     return 'Mulai dalam $minutes menit';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return 'Berbunyi dalam $minutes mnt';
+  }
+
+  @override
+  String get snoozeAgainAction => 'Tunda lagi';
+
+  @override
+  String get alarmRingingNotificationTitle => 'Alarm PluriWave';
+
+  @override
+  String get alarmFireChannelName => 'Alarm berbunyi';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'Suara dan layar mendesak saat alarm musik harus berbunyi';
+
+  @override
+  String get alarmPreNoticeChannelName => 'Pengingat alarm';
+
+  @override
+  String get alarmPreNoticeChannelDescription =>
+      'Notifikasi senyap sebelum alarm';
+
+  @override
+  String get openFolderChooserTitle => 'Buka folder';
+
+  @override
+  String get openRecordingChooserTitle => 'Buka rekaman';
+
   @override
   String get eqDeviceEditTitle => 'Edit perangkat';
 

lib/l10n/gen/app_localizations_it.dart

@@ -1270,6 +1270,37 @@ class AppLocalizationsIt extends AppLocalizations {
     return 'Inizia tra $minutes min';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return 'Suona tra $minutes min';
+  }
+
+  @override
+  String get snoozeAgainAction => 'Posponi di nuovo';
+
+  @override
+  String get alarmRingingNotificationTitle => 'Sveglia PluriWave';
+
+  @override
+  String get alarmFireChannelName => 'Sveglie in corso';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'Suono e schermo urgenti quando una sveglia musicale deve suonare';
+
+  @override
+  String get alarmPreNoticeChannelName => 'Promemoria sveglia';
+
+  @override
+  String get alarmPreNoticeChannelDescription =>
+      'Notifiche silenziose prima della sveglia';
+
+  @override
+  String get openFolderChooserTitle => 'Apri cartella';
+
+  @override
+  String get openRecordingChooserTitle => 'Apri registrazione';
+
   @override
   String get eqDeviceEditTitle => 'Modifica dispositivo';
 

lib/l10n/gen/app_localizations_ja.dart

@@ -1220,6 +1220,35 @@ class AppLocalizationsJa extends AppLocalizations {
     return '$minutes分後に開始';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return '$minutes分後に鳴ります';
+  }
+
+  @override
+  String get snoozeAgainAction => 'もう一度スヌーズ';
+
+  @override
+  String get alarmRingingNotificationTitle => 'PluriWave アラーム';
+
+  @override
+  String get alarmFireChannelName => '鳴っているアラーム';
+
+  @override
+  String get alarmFireChannelDescription => '音楽アラームが鳴るときの緊急の音と画面';
+
+  @override
+  String get alarmPreNoticeChannelName => 'アラームの事前通知';
+
+  @override
+  String get alarmPreNoticeChannelDescription => 'アラーム前のサイレント通知';
+
+  @override
+  String get openFolderChooserTitle => 'フォルダを開く';
+
+  @override
+  String get openRecordingChooserTitle => '録音を開く';
+
   @override
   String get eqDeviceEditTitle => 'デバイスを編集';
 

lib/l10n/gen/app_localizations_pt.dart

@@ -1262,6 +1262,37 @@ class AppLocalizationsPt extends AppLocalizations {
     return 'Começa em $minutes min';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return 'Toca em $minutes min';
+  }
+
+  @override
+  String get snoozeAgainAction => 'Adiar novamente';
+
+  @override
+  String get alarmRingingNotificationTitle => 'Alarme PluriWave';
+
+  @override
+  String get alarmFireChannelName => 'Alarmes tocando';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'Som e tela urgentes quando um alarme musical deve tocar';
+
+  @override
+  String get alarmPreNoticeChannelName => 'Avisos de alarme';
+
+  @override
+  String get alarmPreNoticeChannelDescription =>
+      'Notificações silenciosas antes do alarme';
+
+  @override
+  String get openFolderChooserTitle => 'Abrir pasta';
+
+  @override
+  String get openRecordingChooserTitle => 'Abrir gravação';
+
   @override
   String get eqDeviceEditTitle => 'Editar dispositivo';
 

lib/l10n/gen/app_localizations_ru.dart

@@ -1266,6 +1266,37 @@ class AppLocalizationsRu extends AppLocalizations {
     return 'Начнётся через $minutes мин';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return 'Прозвонит через $minutes мин';
+  }
+
+  @override
+  String get snoozeAgainAction => 'Отложить снова';
+
+  @override
+  String get alarmRingingNotificationTitle => 'Будильник PluriWave';
+
+  @override
+  String get alarmFireChannelName => 'Звонящие будильники';
+
+  @override
+  String get alarmFireChannelDescription =>
+      'Срочный звук и экран, когда должен сработать музыкальный будильник';
+
+  @override
+  String get alarmPreNoticeChannelName => 'Напоминания о будильнике';
+
+  @override
+  String get alarmPreNoticeChannelDescription =>
+      'Беззвучные уведомления перед будильником';
+
+  @override
+  String get openFolderChooserTitle => 'Открыть папку';
+
+  @override
+  String get openRecordingChooserTitle => 'Открыть запись';
+
   @override
   String get eqDeviceEditTitle => 'Изменить устройство';
 

lib/l10n/gen/app_localizations_zh.dart

@@ -1213,6 +1213,35 @@ class AppLocalizationsZh extends AppLocalizations {
     return '$minutes分钟后开始';
   }
 
+  @override
+  String snoozeCountdown(int minutes) {
+    return '$minutes分钟后响铃';
+  }
+
+  @override
+  String get snoozeAgainAction => '再次小睡';
+
+  @override
+  String get alarmRingingNotificationTitle => 'PluriWave 闹钟';
+
+  @override
+  String get alarmFireChannelName => '响铃的闹钟';
+
+  @override
+  String get alarmFireChannelDescription => '音乐闹钟需要响起时的紧急声音和屏幕';
+
+  @override
+  String get alarmPreNoticeChannelName => '闹钟预告';
+
+  @override
+  String get alarmPreNoticeChannelDescription => '闹钟前的静音通知';
+
+  @override
+  String get openFolderChooserTitle => '打开文件夹';
+
+  @override
+  String get openRecordingChooserTitle => '打开录音';
+
   @override
   String get eqDeviceEditTitle => '编辑设备';
 

lib/pantallas/pantalla_alarma_sonando.dart

@@ -154,10 +154,17 @@ class _PantallaAlarmaSonandoState extends State<PantallaAlarmaSonando> {
   Future<void> _detener() async {
     final radio = context.read<EstadoRadio>();
     final alarmas = context.read<EstadoAlarmas>();
-    await _liberarAudioLocal();
-    await radio.audio.pausar();
-    await alarmas.finalizarEjecucion(widget.alarma.id);
-    if (mounted) _dismissScreen();
+    await _silenciarAudio(radio);
+    // Dismiss is run from finally so a failing reschedule/teardown can never
+    // leave the ringing screen stuck open (which would also block the next
+    // ring via the _alarmaSonandoActiva guard in app.dart).
+    try {
+      await alarmas.finalizarEjecucion(widget.alarma.id);
+    } catch (e) {
+      debugPrint('[PluriWave][alarmas] finalizar ejecucion fallo: $e');
+    } finally {
+      if (mounted) _dismissScreen();
+    }
   }
 
   /// Flutter-first snooze (S2-R1): tears down local audio, then routes
@@ -166,10 +173,33 @@ class _PantallaAlarmaSonandoState extends State<PantallaAlarmaSonando> {
   Future<void> _posponer(int minutos) async {
     final radio = context.read<EstadoRadio>();
     final alarmas = context.read<EstadoAlarmas>();
-    await _liberarAudioLocal();
-    await radio.audio.pausar();
-    await alarmas.posponerAlarma(widget.alarma, minutos);
-    if (mounted) _dismissScreen();
+    await _silenciarAudio(radio);
+    // See _detener: the screen MUST close even if posponerAlarma throws
+    // (e.g. native scheduleAlarm returns false on a device without exact
+    // alarm permission). Otherwise the modal freezes and the snooze never
+    // re-rings because _alarmaSonandoActiva stays true.
+    try {
+      await alarmas.posponerAlarma(widget.alarma, minutos);
+    } catch (e) {
+      debugPrint('[PluriWave][alarmas] posponer alarma fallo: $e');
+    } finally {
+      if (mounted) _dismissScreen();
+    }
+  }
+
+  /// Stops both audio sources (local fallback player and the radio handler)
+  /// without letting either failure abort the caller's dismiss flow.
+  Future<void> _silenciarAudio(EstadoRadio radio) async {
+    try {
+      await _liberarAudioLocal();
+    } catch (e) {
+      debugPrint('[PluriWave][alarmas] liberar audio local fallo: $e');
+    }
+    try {
+      await radio.audio.pausar();
+    } catch (e) {
+      debugPrint('[PluriWave][alarmas] pausar radio fallo: $e');
+    }
   }
 
   /// Dismisses the alarm screen safely in both live-app and dead-app states.

lib/servicios/servicio_alarmas_android.dart

@@ -23,6 +23,10 @@ class EventoAlarmaAndroid {
   /// (notification "Posponer" while the app may be backgrounded/killed).
   static const accionSnoozed = 'snoozed';
 
+  /// Action reported when a pending snooze was cancelled natively from the
+  /// countdown notification ("Detener" while the app may be killed).
+  static const accionSnoozeCancelled = 'snoozeCancelled';
+
   final String alarmaId;
   final String titulo;
   final String accion;
@@ -168,19 +172,41 @@ class ServicioAlarmasAndroid implements PuertoAlarmasAndroid {
   @override
   void configurarLocalizaciones(AppLocalizations l10n) {
     _l10n = l10n;
+    // Push every localized notification/channel/chooser string to the native
+    // side so it can build localized notifications even when the Flutter engine
+    // is dead (alarm fired from a killed app). Fire-and-forget; runs once per
+    // locale change (callers guard against per-rebuild churn).
+    unawaited(_enviarTextosNotificacion(l10n));
   }
 
-  /// Builds a pre-notice template string with a literal `{minutes}` placeholder
-  /// for Kotlin to replace at broadcast-receiver fire time.
-  ///
-  /// Strategy: call [preNoticeCountdown] with a unique sentinel integer and
-  /// replace the sentinel's string representation with `{minutes}`.
-  static String _preNoticeTemplate(AppLocalizations l10n) {
+  Future<void> _enviarTextosNotificacion(AppLocalizations l10n) async {
+    try {
+      await _channel.invokeMethod<void>('setNotificationStrings', {
+        'ringTitle': l10n.alarmRingingNotificationTitle,
+        'snoozeLabel': l10n.snoozeAction,
+        'stopLabel': l10n.stopAlarmAction,
+        'skipLabel': l10n.skipNextAction,
+        'snoozeAgainLabel': l10n.snoozeAgainAction,
+        'fireChannelName': l10n.alarmFireChannelName,
+        'fireChannelDescription': l10n.alarmFireChannelDescription,
+        'preNoticeChannelName': l10n.alarmPreNoticeChannelName,
+        'preNoticeChannelDescription': l10n.alarmPreNoticeChannelDescription,
+        'preNoticeTemplate': _plantillaMinutos(l10n.preNoticeCountdown),
+        'snoozeCountdownTemplate': _plantillaMinutos(l10n.snoozeCountdown),
+        'openFolderTitle': l10n.openFolderChooserTitle,
+        'openRecordingTitle': l10n.openRecordingChooserTitle,
+      });
+    } catch (e) {
+      debugPrint('[PluriWave][alarmas] setNotificationStrings ERROR $e');
+    }
+  }
+
+  /// Turns a localized `{int} -> String` message into a template with a literal
+  /// `{minutes}` placeholder for Kotlin to fill at fire time: it calls the
+  /// message with a unique sentinel and swaps the sentinel back for `{minutes}`.
+  static String _plantillaMinutos(String Function(int) traducir) {
     const sentinel = 42424242;
-    return l10n.preNoticeCountdown(sentinel).replaceFirst(
-      sentinel.toString(),
-      '{minutes}',
-    );
+    return traducir(sentinel).replaceFirst(sentinel.toString(), '{minutes}');
   }
 
   @override
@@ -202,7 +228,6 @@ class ServicioAlarmasAndroid implements PuertoAlarmasAndroid {
     final programada = await _channel.invokeMethod<bool>('scheduleAlarm', {
       'id': alarma.id,
       'title': localizedAlarmName(_textos, alarma.nombre),
-      'preNoticeTemplate': _preNoticeTemplate(_textos),
       'triggerAtMillis': proxima.millisecondsSinceEpoch,
       'preNoticeAtMillis':
           alarma.snoozeHasta == null

test/estado/estado_alarmas_snooze_test.dart

@@ -248,4 +248,61 @@ void main() {
       expect(android.programadas.last.snoozeHasta, isNull);
     },
   );
+
+  test(
+    'evento nativo snoozeCancelled limpia el snooze y avanza sin reprogramar',
+    () async {
+      final ahora = DateTime(2026, 6, 11, 7, 32);
+      final android = FakePuertoAlarmasAndroid();
+      final estado = EstadoAlarmas(
+        servicio: ServicioAlarmas(reloj: () => ahora),
+        android: android,
+        iniciarAutomaticamente: false,
+      );
+      addTearDown(estado.dispose);
+      addTearDown(android.dispose);
+      await estado.guardarAlarma(
+        AlarmaMusical(
+          id: 'cancel1',
+          nombre: 'Diaria',
+          hora: 7,
+          minuto: 30,
+          tipoProgramacion: TipoProgramacionAlarma.diaria,
+          diasSemana: const [],
+          proximaEjecucion: DateTime(2026, 6, 11, 7, 30),
+          snoozeHasta: DateTime(2026, 6, 11, 7, 35),
+          snoozeOrigen: DateTime(2026, 6, 11, 7, 30),
+        ),
+      );
+      expect(estado.alarmas.single.snoozeHasta, isNotNull);
+      final programadasAntes = android.programadas.length;
+      final notificado = Completer<void>();
+      estado.addListener(() {
+        if (!notificado.isCompleted) notificado.complete();
+      });
+
+      android.emitirEvento(
+        EventoAlarmaAndroid(
+          alarmaId: 'cancel1',
+          titulo: 'Diaria',
+          accion: EventoAlarmaAndroid.accionSnoozeCancelled,
+          occurrenceAtMillis:
+              DateTime(2026, 6, 11, 7, 30).millisecondsSinceEpoch,
+        ),
+      );
+      await notificado.future;
+
+      expect(estado.alarmas.single.snoozeHasta, isNull);
+      expect(
+        estado.alarmas.single.proximaEjecucion,
+        DateTime(2026, 6, 12, 7, 30),
+        reason: 'avanza a la próxima ocurrencia diaria',
+      );
+      expect(
+        android.programadas.length,
+        programadasAntes,
+        reason: 'el nativo ya reprogramó; no debe haber un segundo programar',
+      );
+    },
+  );
 }

test/servicios/servicio_alarmas_pre_notice_template_test.dart

@@ -1,5 +1,8 @@
+import 'dart:ui' show Locale;
+
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:pluriwave/l10n/gen/app_localizations.dart';
 import 'package:pluriwave/modelos/alarma_musical.dart';
 import 'package:pluriwave/servicios/servicio_alarmas_android.dart';
 
@@ -25,55 +28,75 @@ void main() {
   });
 
   test(
-    'programar includes preNoticeTemplate with {minutes} placeholder in MethodChannel call',
+    'configurarLocalizaciones pushes localized notification strings with {minutes} templates',
     () async {
       final servicio = ServicioAlarmasAndroid(channel: channel);
-      final alarma = AlarmaMusical(
-        id: 'test-alarm',
-        nombre: 'Morning alarm',
-        hora: 7,
-        minuto: 0,
-        tipoProgramacion: TipoProgramacionAlarma.diaria,
-        diasSemana: const [],
-        proximaEjecucion: DateTime(2099, 1, 1, 7, 0),
+      final l10n = lookupAppLocalizations(const Locale('es'));
+
+      servicio.configurarLocalizaciones(l10n);
+      // configurarLocalizaciones fires setNotificationStrings as unawaited; let
+      // the microtask/event queue drain so the MethodChannel call is recorded.
+      await Future<void>.delayed(Duration.zero);
+
+      final llamada = llamadas.singleWhere(
+        (c) => c.method == 'setNotificationStrings',
+      );
+      final args = llamada.arguments as Map<Object?, Object?>;
+
+      expect(
+        args['preNoticeTemplate'],
+        contains('{minutes}'),
+        reason: 'pre-notice template must keep the {minutes} placeholder',
+      );
+      expect(
+        args['snoozeCountdownTemplate'],
+        contains('{minutes}'),
+        reason: 'snooze countdown template must keep the {minutes} placeholder',
       );
 
-      await servicio.programar(alarma);
-
-      final llamada = llamadas.singleWhere((c) => c.method == 'scheduleAlarm');
-      final args = llamada.arguments as Map<Object?, Object?>;
-      expect(args.containsKey('preNoticeTemplate'), isTrue,
-          reason: 'preNoticeTemplate must be present in scheduleAlarm args');
-      final template = args['preNoticeTemplate'] as String?;
-      expect(template, isNotNull,
-          reason: 'preNoticeTemplate must not be null');
-      expect(template, contains('{minutes}'),
-          reason: 'preNoticeTemplate must contain the {minutes} placeholder');
+      // Every notification/channel/chooser string must be present and non-empty
+      // so the native side never falls back to English for a configured locale.
+      const claves = [
+        'ringTitle',
+        'snoozeLabel',
+        'stopLabel',
+        'skipLabel',
+        'snoozeAgainLabel',
+        'fireChannelName',
+        'fireChannelDescription',
+        'preNoticeChannelName',
+        'preNoticeChannelDescription',
+        'openFolderTitle',
+        'openRecordingTitle',
+      ];
+      for (final clave in claves) {
+        expect(args[clave], isA<String>(), reason: '$clave missing');
+        expect(
+          (args[clave] as String).isNotEmpty,
+          isTrue,
+          reason: '$clave is empty',
+        );
+      }
     },
   );
 
-  test(
-    'programar preNoticeTemplate uses default locale fallback when no l10n configured',
-    () async {
-      // ServicioAlarmasAndroid falls back to es locale when no l10n is configured
-      final servicio = ServicioAlarmasAndroid(channel: channel);
-      final alarma = AlarmaMusical(
-        id: 'test-alarm-2',
-        nombre: 'Alarm',
-        hora: 8,
-        minuto: 30,
-        tipoProgramacion: TipoProgramacionAlarma.diaria,
-        diasSemana: const [],
-        proximaEjecucion: DateTime(2099, 1, 2, 8, 30),
-      );
+  test('scheduleAlarm no longer carries notification string templates', () async {
+    final servicio = ServicioAlarmasAndroid(channel: channel);
+    final alarma = AlarmaMusical(
+      id: 'no-template',
+      nombre: 'Alarm',
+      hora: 8,
+      minuto: 30,
+      tipoProgramacion: TipoProgramacionAlarma.diaria,
+      diasSemana: const [],
+      proximaEjecucion: DateTime(2099, 1, 2, 8, 30),
+    );
 
-      await servicio.programar(alarma);
+    await servicio.programar(alarma);
 
-      final llamada = llamadas.singleWhere((c) => c.method == 'scheduleAlarm');
-      final args = llamada.arguments as Map<Object?, Object?>;
-      final template = args['preNoticeTemplate'] as String?;
-      // The template must contain the literal placeholder string
-      expect(template, contains('{minutes}'));
-    },
-  );
+    final llamada = llamadas.singleWhere((c) => c.method == 'scheduleAlarm');
+    final args = llamada.arguments as Map<Object?, Object?>;
+    expect(args.containsKey('preNoticeTemplate'), isFalse);
+    expect(args.containsKey('snoozeCountdownTemplate'), isFalse);
+  });
 }