fix: Convert Date to string for all remaining date fields in stock pages

app/(main)/stock/sorties/page.tsx

@@ -792,11 +792,11 @@ const SortiesPage = () => {
 
                             <div className="field col-12 md:col-4">
                                 <label htmlFor="dateSortie">Date de sortie</label>
-                                <Calendar 
-                                    id="dateSortie" 
-                                    value={exit.dateSortie} 
-                                    onChange={(e) => setExit({...exit, dateSortie: e.value || new Date()})} 
-                                    showIcon 
+                                <Calendar
+                                    id="dateSortie"
+                                    value={exit.dateSortie}
+                                    onChange={(e) => setExit({...exit, dateSortie: e.value?.toISOString() || new Date().toISOString()})}
+                                    showIcon
                                 />
                             </div>