Refactor event management and UI components: Update date handling in EventManagement to format dates for input, enhance EventsSection to display a message when no events are available, and improve styling in multiple components for better layout consistency.

components/admin/EventManagement.tsx

@@ -151,8 +151,10 @@ export default function EventManagement() {
   const handleEdit = (event: Event) => {
     setEditingEvent(event);
     setIsCreating(false);
+    // Convertir la date ISO en format YYYY-MM-DD pour l'input date
+    const dateValue = event.date ? new Date(event.date).toISOString().split('T')[0] : "";
     setFormData({
-      date: event.date,
+      date: dateValue,
       name: event.name,
       description: event.description,
       type: event.type,