fix(alarm): localize pre-notice countdown and fix snooze dismiss

Replace hardcoded Spanish pre-notice text with computed remaining
minutes using l10n template passed via MethodChannel. Fix snooze
dismiss in dead-app state with canPop guard and SystemNavigator.pop
fallback.

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

@@ -39,7 +39,8 @@ class AlarmScheduler(private val context: Context) {
         snoozeMinutes: Int = 5,
         fallbackStationName: String? = null,
         fallbackStationUrl: String? = null,
-        fadeInSegundos: Int = 0
+        fadeInSegundos: Int = 0,
+        preNoticeTemplate: String? = null
     ): Boolean {
         val existing = readSpec(id)
         val preservedSnooze = preserveNativeSnooze(
@@ -70,7 +71,8 @@ class AlarmScheduler(private val context: Context) {
             fallbackSound = fallbackSound,
             volume = volume.coerceIn(0f, 1f),
             fadeInSegundos = fadeInSegundos.coerceIn(0, 60),
-            timezoneId = TimeZone.getDefault().id
+            timezoneId = TimeZone.getDefault().id,
+            preNoticeTemplate = preNoticeTemplate
         )
         return scheduleSpec(spec, persistOnSuccess = true)
     }
@@ -145,6 +147,7 @@ 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
                     )
@@ -165,6 +168,7 @@ 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}")
@@ -652,7 +656,10 @@ class AlarmScheduler(private val context: Context) {
         val fallbackSound: String?,
         val volume: Float,
         val fadeInSegundos: Int = 0,
-        val timezoneId: String
+        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
     ) {
         fun toJson(): JSONObject = JSONObject().apply {
             put("schemaVersion", 3)
@@ -679,6 +686,7 @@ class AlarmScheduler(private val context: Context) {
             put("volume", volume)
             put("fadeInSegundos", fadeInSegundos)
             put("timezoneId", timezoneId)
+            put("preNoticeTemplate", preNoticeTemplate)
         }
 
         companion object {
@@ -715,7 +723,8 @@ 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)
+                    timezoneId = json.optString("timezoneId", TimeZone.getDefault().id),
+                    preNoticeTemplate = json.optString("preNoticeTemplate").takeIf { it.isNotBlank() }
                 )
             }
         }
@@ -730,6 +739,9 @@ 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

@@ -115,7 +115,8 @@ 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
+                            fadeInSegundos = call.argument<Int>("fadeInSegundos") ?: 0,
+                            preNoticeTemplate = call.argument<String>("preNoticeTemplate")
                         )
                         result.success(scheduled)
                     }

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

@@ -51,7 +51,8 @@ class PluriWaveAlarmReceiver : BroadcastReceiver() {
                     title,
                     snoozeMinutes,
                     intent.getLongExtra(EXTRA_TRIGGER_AT, 0L),
-                    intent.getLongExtra(EXTRA_OCCURRENCE_AT, 0L)
+                    intent.getLongExtra(EXTRA_OCCURRENCE_AT, 0L),
+                    intent.getStringExtra(AlarmScheduler.EXTRA_PRE_NOTICE_TEMPLATE)
                 )
             }
             ACTION_POSTPONE_NEXT -> {
@@ -100,10 +101,14 @@ class PluriWaveAlarmReceiver : BroadcastReceiver() {
         title: String,
         snoozeMinutes: Int,
         triggerAtMillis: Long,
-        occurrenceAtMillis: Long
+        occurrenceAtMillis: Long,
+        preNoticeTemplate: String? = null
     ) {
         ensureChannel(context)
 
+        val remaining = computeRemainingMinutes(triggerAtMillis)
+        val contentText = formatPreNoticeText(preNoticeTemplate, remaining)
+
         val openAppIntent = PendingIntent.getActivity(
             context,
             requestCode(alarmId, 1),
@@ -144,7 +149,7 @@ class PluriWaveAlarmReceiver : BroadcastReceiver() {
         val notification = NotificationCompat.Builder(context, CHANNEL_ID)
             .setSmallIcon(android.R.drawable.ic_dialog_info)
             .setContentTitle(title)
-            .setContentText("Empieza en 30 minutos")
+            .setContentText(contentText)
             .setPriority(NotificationCompat.PRIORITY_LOW)
             .setCategory(NotificationCompat.CATEGORY_REMINDER)
             .setSilent(true)
@@ -156,12 +161,31 @@ class PluriWaveAlarmReceiver : BroadcastReceiver() {
 
         try {
             NotificationManagerCompat.from(context).notify(notificationIdForAlarm(alarmId), notification)
-            Log.d(TAG, "alarm.notification preNotice shown id=$alarmId")
+            Log.d(TAG, "alarm.notification preNotice shown id=$alarmId remaining=$remaining")
         } catch (error: SecurityException) {
             Log.e(TAG, "alarm.notification preNotice SecurityException id=$alarmId", error)
         }
     }
 
+    /**
+     * Computes the number of minutes remaining until [triggerAtMillis],
+     * clamped to a minimum of 1. Handles Doze-delayed wakeups and clock drift.
+     */
+    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