feat: implement absence management features in the dashboard

- Added functionality for managing absence requests, including listing, approving, and rejecting requests.
- Enhanced the user interface to display statistics and pending requests for better oversight.
- Updated backend schema to support absence requests and notifications, ensuring data integrity and efficient handling.
- Integrated new components for absence request forms and approval workflows, improving user experience and administrative efficiency.

apps/web/src/app.css

@@ -1,6 +1,8 @@
 @import "tailwindcss";
 @plugin "daisyui";
 
+/* FullCalendar CSS - v6 não exporta CSS separado, estilos são aplicados via JavaScript */
+
 /* Estilo padrão dos botões - mesmo estilo do sidebar */
 .btn-standard {
   @apply font-medium flex items-center justify-center gap-2 text-center p-3 rounded-xl border border-base-300 bg-base-100 hover:bg-primary/60 active:bg-primary text-base-content hover:text-white active:text-white transition-colors;