- 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

app/(protected)/_layout.tsx

@@ -64,6 +64,7 @@ export default function ProtectedLayout() {
           tabBarIcon: ({ color, size }) => <FileText color={color} size={24} />,
         }}
       />
+      {/* // TODO: Rimuovere all'utente e mostrare solo a admin */}
       <Tabs.Screen
         name="automation"
         options={{
@@ -71,7 +72,7 @@ export default function ProtectedLayout() {
           tabBarIcon: ({ color, size }) => <Zap color={color} size={24} />,
         }}
       />
-      {/* TODO: Da rimuovere */}
+      {/* TODO: Dovrebbe essere rimosso, va rivisto layout */}
       <Tabs.Screen
         name="profile"
         options={{