fix(front): afficher le statut Refusé pour les parents (#110)

_displayStatus refuse → Refusé ; filtre dropdown Parents aligné.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/lib/widgets/admin/parent_managmant_widget.dart

@@ -104,6 +104,8 @@ class _ParentManagementWidgetState extends State<ParentManagementWidget> {
         return 'En attente';
       case 'suspendu':
         return 'Suspendu';
+      case 'refuse':
+        return 'Refusé';
       default:
         return 'Inconnu';
     }

frontend/lib/widgets/admin/user_management_panel.dart

@@ -158,6 +158,13 @@ class _UserManagementPanelState extends State<UserManagementPanel> {
                 child: Text('Suspendu', style: TextStyle(fontSize: 12)),
               ),
             ),
+            DropdownMenuItem<String?>(
+              value: 'refuse',
+              child: Padding(
+                padding: EdgeInsets.only(left: 10),
+                child: Text('Refusé', style: TextStyle(fontSize: 12)),
+              ),
+            ),
           ],
           onChanged: (value) {
             setState(() {