fix: Revert Date to ISO string conversions for local state objects (they expect Date not string)

app/(main)/devis/expires/page.tsx

@@ -535,7 +535,7 @@ RECOMMANDATIONS:
                                         <Calendar
                                             id="newValidityDate"
                                             value={renewData.newValidityDate}
-                                            onChange={(e) => setRenewData(prev => ({ ...prev, newValidityDate: e.value?.toISOString() || new Date().toISOString() }))}
+                                            onChange={(e) => setRenewData(prev => ({ ...prev, newValidityDate: e.value || new Date() }))}
                                             dateFormat="dd/mm/yy"
                                             showIcon
                                             minDate={new Date()}