feat: Implement pending notifications screen and enhance notification handling

lib/services/database_helper.dart

@@ -431,11 +431,13 @@ class DatabaseHelper {
 
   Future<List<Map<String, dynamic>>> getPendingNotifications() async {
     Database db = await database;
-    return await db.query(
-      notificationTrackingTable,
-      where: 'status IN (?, ?)',
-      whereArgs: ['pending', 'retrying'],
-    );
+    return await db.rawQuery('''
+      SELECT nt.*, s.name as supplementName
+      FROM $notificationTrackingTable nt
+      LEFT JOIN $supplementsTable s ON nt.supplementId = s.id
+      WHERE nt.status IN (?, ?)
+      ORDER BY nt.scheduledTime ASC
+    ''', ['pending', 'retrying']);
   }
 
   Future<void> markNotificationExpired(int notificationId) async {