feat: sort tags in KanbanFilters by usage count

- Added sorting functionality to `KanbanFilters` to display tags in descending order based on their usage count.
- Introduced `sortedTags` using `useMemo` for performance optimization, ensuring efficient re-calculation when `availableTags` or `tagCounts` change.
- Updated the rendering logic to utilize `sortedTags` instead of `availableTags`, enhancing the user experience by prioritizing frequently used tags.

components/kanban/KanbanFilters.tsx

@@ -138,6 +138,15 @@ export function KanbanFilters({ filters, onFiltersChange }: KanbanFiltersProps)
     count: priorityCounts[priorityConfig.key] || 0
   }));
 
+  // Trier les tags par nombre d'utilisation (décroissant)
+  const sortedTags = useMemo(() => {
+    return [...availableTags].sort((a, b) => {
+      const countA = tagCounts[a.name] || 0;
+      const countB = tagCounts[b.name] || 0;
+      return countB - countA; // Décroissant
+    });
+  }, [availableTags, tagCounts]);
+
   return (
     <div className="bg-slate-900/50 border-b border-slate-700/50 backdrop-blur-sm">
       <div className="container mx-auto px-6 py-4">
@@ -302,7 +311,7 @@ export function KanbanFilters({ filters, onFiltersChange }: KanbanFiltersProps)
                   Tags
                 </label>
                 <div className="flex flex-wrap gap-2">
-                  {availableTags.map((tag) => (
+                  {sortedTags.map((tag) => (
                     <button
                       key={tag.id}
                       onClick={() => handleTagToggle(tag.name)}