- Refactor Profile and Login screens to use AuthContext for user data

- Enhance RequestPermitModal with multiple time-off types and validation
- Implement CalendarWidget for visualizing time-off requests
- Improve API error handling and token management
- Add utility functions for consistent date and time formatting
- Clean up unused mock data and update types

utils/dateTime.ts

@@ -0,0 +1,21 @@
+/**
+ * Trasforma una data da "YYYY-MM-DD" a "DD/MM/YYYY"
+ * @param dateStr stringa data in formato ISO "YYYY-MM-DD"
+ * @returns stringa formattata "DD/MM/YYYY"
+ */
+export const formatDate = (dateStr: string | null | undefined): string => {
+    if (!dateStr) return '';
+    const [year, month, day] = dateStr.split('-');
+    return `${day}/${month}/${year}`;
+};
+
+/**
+ * Trasforma un'ora da "HH:MM:SS" a "HH:MM"
+ * @param timeStr stringa ora in formato "HH:MM:SS"
+ * @returns stringa formattata "HH:MM"
+ */
+export const formatTime = (timeStr: string | null | undefined): string => {
+    if (!timeStr) return '';
+    const [hours, minutes] = timeStr.split(':');
+    return `${hours}:${minutes}`;
+};