feat: Integrate ShadSonner for improved toast notifications across multiple screens

lib/services/notification_router.dart

@@ -4,6 +4,7 @@ import 'dart:convert';
 import 'package:flutter/material.dart';
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:provider/provider.dart';
+import 'package:shadcn_ui/shadcn_ui.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:supplements/logging.dart';
 import 'package:supplements/services/simple_notification_service.dart';
@@ -32,9 +33,6 @@ class NotificationRouter {
     printLog('🔔 handleNotificationResponse: Received actionId: $actionId');
     printLog('🔔 handleNotificationResponse: Decoded payloadMap: $payloadMap');
 
-    // Cancel retry notifications for any interaction (take, snooze, or tap)
-    await _cancelRetryNotificationsForResponse(payloadMap);
-
     // Handle Snooze actions without surfacing UI
     if (actionId == 'snooze_single' || actionId == 'snooze_group') {
       try {
@@ -49,6 +47,11 @@ class NotificationRouter {
 
     // Default: route to in-app UI for Take actions and normal taps
     await _routeFromPayload(payloadMap);
+
+    // Cancel retry notifications only for Take actions (not for taps or snoozes)
+    if (actionId == 'take_single' || actionId == 'take_group') {
+      await _cancelRetryNotificationsForResponse(payloadMap);
+    }
   }
 
   Future<void> handleAppLaunchDetails(NotificationAppLaunchDetails? details) async {
@@ -294,8 +297,10 @@ class NotificationRouter {
 
   void _showSnack(BuildContext context, String message) {
     WidgetsBinding.instance.addPostFrameCallback((_) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(message)),
+      ShadSonner.of(context).show(
+        ShadToast(
+          title: Text(message),
+        ),
       );
     });
   }