feat: overhaul TODO.md and enhance Kanban components

- Updated TODO.md to reflect the new project structure and phases, marking several tasks as completed.
- Enhanced Kanban components with a tech-inspired design, including new styles for columns and task cards.
- Removed the obsolete reminders service and task processor, streamlining the codebase for better maintainability.
- Introduced a modern API for task management, including CRUD operations and improved error handling.
- Updated global styles for a cohesive dark theme and added custom scrollbar styles.

scripts/seed-data.ts

@@ -0,0 +1,100 @@
+import { tasksService } from '../services/tasks';
+import { TaskStatus, TaskPriority } from '../lib/types';
+
+/**
+ * Script pour ajouter des données de test avec tags et variété
+ */
+async function seedTestData() {
+  console.log('🌱 Ajout de données de test...');
+  console.log('================================');
+
+  const testTasks = [
+    {
+      title: '🎨 Redesign du dashboard',
+      description: 'Créer une interface moderne et intuitive pour le tableau de bord principal',
+      status: 'in_progress' as TaskStatus,
+      priority: 'high' as TaskPriority,
+      tags: ['design', 'ui', 'frontend'],
+      dueDate: new Date('2025-01-20')
+    },
+    {
+      title: '🔧 Optimiser les performances API',
+      description: 'Améliorer les temps de réponse des endpoints et ajouter la pagination',
+      status: 'todo' as TaskStatus,
+      priority: 'medium' as TaskPriority,
+      tags: ['backend', 'performance', 'api'],
+      dueDate: new Date('2025-01-25')
+    },
+    {
+      title: '✅ Tests unitaires composants',
+      description: 'Ajouter des tests Jest/RTL pour les composants principaux',
+      status: 'done' as TaskStatus,
+      priority: 'medium' as TaskPriority,
+      tags: ['testing', 'jest', 'quality'],
+      dueDate: new Date('2025-01-10')
+    }
+  ];
+
+  let createdCount = 0;
+  let errorCount = 0;
+
+  for (const taskData of testTasks) {
+    try {
+      const task = await tasksService.createTask(taskData);
+      
+      const statusEmoji = {
+        'todo': '⏳',
+        'in_progress': '🔄',
+        'done': '✅',
+        'cancelled': '❌'
+      }[task.status];
+      
+      const priorityEmoji = {
+        'low': '🔵',
+        'medium': '🟡',
+        'high': '🔴'
+      }[task.priority];
+      
+      console.log(`  ${statusEmoji} ${priorityEmoji} ${task.title}`);
+      console.log(`     Tags: ${task.tags?.join(', ') || 'aucun'}`);
+      if (task.dueDate) {
+        console.log(`     Échéance: ${task.dueDate.toLocaleDateString('fr-FR')}`);
+      }
+      console.log('');
+      
+      createdCount++;
+    } catch (error) {
+      console.error(`  ❌ Erreur pour "${taskData.title}":`, error instanceof Error ? error.message : error);
+      errorCount++;
+    }
+  }
+
+  console.log('📊 Résumé:');
+  console.log(`   ✅ Tâches créées: ${createdCount}`);
+  console.log(`   ❌ Erreurs: ${errorCount}`);
+  
+  // Afficher les stats finales
+  const stats = await tasksService.getTaskStats();
+  console.log('');
+  console.log('📈 Statistiques finales:');
+  console.log(`   Total: ${stats.total} tâches`);
+  console.log(`   À faire: ${stats.todo}`);
+  console.log(`   En cours: ${stats.inProgress}`);
+  console.log(`   Terminées: ${stats.completed}`);
+  console.log(`   Annulées: ${stats.cancelled}`);
+  console.log(`   Taux de completion: ${stats.completionRate}%`);
+}
+
+// Exécuter le script
+if (require.main === module) {
+  seedTestData().then(() => {
+    console.log('');
+    console.log('✨ Données de test ajoutées avec succès !');
+    process.exit(0);
+  }).catch((error) => {
+    console.error('💥 Erreur fatale:', error);
+    process.exit(1);
+  });
+}
+
+export { seedTestData };