fix: filter priorities with tasks in PrioritySwimlanesBoard

- Updated PrioritySwimlanesBoard to filter out priorities that have no associated tasks, ensuring only relevant priorities are displayed. This improves the clarity and usability of the swimlanes.

components/kanban/PrioritySwimlanesBoard.tsx

@@ -44,14 +44,16 @@ export function PrioritySwimlanesBoard({
     });
 
     // Convertir en format SwimlaneData en respectant l'ordre de priorité
+    // Filtrer uniquement les priorités qui ont des tâches
     return getAllPriorities()
       .sort((a, b) => b.order - a.order) // Ordre décroissant - plus importantes en haut
+      .filter((priority) => grouped[priority.key].length > 0) // Ne garder que les priorités avec des tâches
       .map((priority) => ({
         key: priority.key,
         label: priority.label,
         icon: priority.icon,
         color: priority.color,
-        tasks: grouped[priority.key] || [],
+        tasks: grouped[priority.key],
         context: {
           type: 'priority' as const,
           value: priority.key,