fix: Resolve TypeScript errors in page.tsx and phases-chantier/page.tsx

app/(main)/maintenances/planifiees/page.tsx

@@ -92,7 +92,7 @@ const MaintenancesPlanifieesPage = () => {
             
             const updatedMaintenance = {
                 ...maintenance,
-                datePrevue: nouvelleDate,
+                datePrevue: nouvelleDate.toISOString(),
                 notes: `${maintenance.notes || ''}\nReportée le ${formatDate(new Date())}`
             };
 
@@ -311,7 +311,7 @@ const MaintenancesPlanifieesPage = () => {
                 <div>
                     <div className="font-semibold">{m.materiel?.nom}</div>
                     <div className="text-sm text-500">{m.description}</div>
-                    <Tag value={m.type?.replace('_', ' ')} severity={getTypeSeverity(m.type)} size="normal" className="mt-1" />
+                    <Tag value={m.type?.replace('_', ' ')} severity={getTypeSeverity(m.type)} className="mt-1" />
                 </div>
             )
         }));
@@ -394,6 +394,7 @@ const MaintenancesPlanifieesPage = () => {
                                 value={maintenances}
                                 selection={selectedMaintenances}
                                 onSelectionChange={(e) => setSelectedMaintenances(e.value)}
+                                selectionMode="checkbox"
                                 dataKey="id"
                                 paginator
                                 rows={10}