One Shot Timers

lib/alarm/logic/alarm_isolate.dart

@@ -249,6 +249,15 @@ void stopTimer(int scheduleId, AlarmStopAction action) async {
         RingtonePlayer.playAlarm(alarm);
       }
     }
+    // One-shot timer: delete from storage on dismiss
+    if (timer.shouldDeleteAfterFinishing) {
+      List<ClockTimer> timers = await loadList("timers");
+      timers.removeWhere((t) => t.id == scheduleId);
+      await saveList("timers", timers);
+      // Notify UI isolate that timers list changed
+      SendPort? updatePort = IsolateNameServer.lookupPortByName(updatePortName);
+      updatePort?.send("updateTimers");
+    }
   }
   RingingManager.stopAllTimers();
 }

lib/l10n/app_en.arb

@@ -301,6 +301,8 @@
   "@startMelodyAtRandomPosDescription": {},
   "vibrationSetting": "Vibration",
   "@vibrationSetting": {},
+  "timerDeleteAfterFinishingSetting": "Delete After Finishing",
+  "@timerDeleteAfterFinishingSetting": {},
   "audioChannelSetting": "Audio Channel",
   "@audioChannelSetting": {},
   "audioChannelAlarm": "Alarm",

lib/timer/data/timer_settings_schema.dart

@@ -92,6 +92,8 @@ SettingGroup timerSettingsSchema = SettingGroup(
         "Vibration",
       ],
     ),
+    SwitchSetting("Delete After Finishing",
+        (context) => AppLocalizations.of(context)!.timerDeleteAfterFinishingSetting, false),
     SliderSetting("Add Length",
         (context) => AppLocalizations.of(context)!.addLengthSetting, 1, 30, 1,
         unit: "minutes", snapLength: 1),

lib/timer/types/timer.dart

@@ -52,6 +52,8 @@ class ClockTimer extends CustomizableListItem {
           ? _settings.getSetting("Time To Full Volume").value
           : TimeDuration.zero;
   double get addLength => _settings.getSetting("Add Length").value;
+  bool get shouldDeleteAfterFinishing =>
+      _settings.getSetting("Delete After Finishing").value;
   List<Tag> get tags => _settings.getSetting("Tags").value;
   TimeDuration get duration => _duration;
   TimeDuration get currentDuration => _currentDuration;

lib/timer/widgets/timer_card.dart

@@ -136,6 +136,15 @@ class _TimerCardState extends State<TimerCard> {
                 ],
               ),
             ),
+            if (widget.timer.shouldDeleteAfterFinishing)
+              SizedBox(
+                width: 24,
+                child: Icon(
+                  Icons.delete_outline_rounded,
+                  size: 18,
+                  color: colorScheme.onSurface.withOpacity(0.4),
+                ),
+              ),
             const Spacer(),
             CardEditMenu(actions: [
               if (!widget.timer.isStopped)