feat(#44): UserManagementPanel + masquer onglet Administrateurs (dashboard gestionnaire)

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

frontend/lib/screens/administrateurs/admin_dashboardScreen.dart

@@ -106,6 +106,6 @@ class _AdminDashboardScreenState extends State<AdminDashboardScreen> {
         selectedSettingsTabIndex: settingsSubIndex,
       );
     }
-    return const AdminUserManagementPanel();
+    return const UserManagementPanel();
   }
 }

frontend/lib/screens/gestionnaire/gestionnaire_dashboard_screen.dart

@@ -4,7 +4,7 @@ import 'package:p_tits_pas/widgets/admin/user_management_panel.dart';
 import 'package:p_tits_pas/widgets/app_footer.dart';
 
 /// Dashboard gestionnaire – même shell que l'admin, sans onglet Paramètres.
-/// Réutilise [AdminUserManagementPanel].
+/// Réutilise [UserManagementPanel].
 class GestionnaireDashboardScreen extends StatefulWidget {
   const GestionnaireDashboardScreen({super.key});
 
@@ -36,7 +36,9 @@ class _GestionnaireDashboardScreenState extends State<GestionnaireDashboardScree
       ),
       body: Column(
         children: [
-          const Expanded(child: AdminUserManagementPanel()),
+          Expanded(
+            child: UserManagementPanel(showAdministrateursTab: false),
+          ),
           const AppFooter(),
         ],
       ),

frontend/lib/widgets/admin/dashboard_admin.dart

@@ -139,7 +139,8 @@ class DashboardAppBarAdmin extends StatelessWidget
   }
 }
 
-/// Sous-barre : Gestionnaires | Parents | Assistantes maternelles | Administrateurs.
+/// Sous-barre : Gestionnaires | Parents | Assistantes maternelles | [Administrateurs].
+/// [subTabCount] = 3 pour masquer l'onglet Administrateurs (dashboard gestionnaire).
 class DashboardUserManagementSubBar extends StatelessWidget {
   final int selectedSubIndex;
   final ValueChanged<int> onSubTabChange;
@@ -148,6 +149,14 @@ class DashboardUserManagementSubBar extends StatelessWidget {
   final Widget? filterControl;
   final VoidCallback? onAddPressed;
   final String addLabel;
+  final int subTabCount;
+
+  static const List<String> _tabLabels = [
+    'Gestionnaires',
+    'Parents',
+    'Assistantes maternelles',
+    'Administrateurs',
+  ];
 
   const DashboardUserManagementSubBar({
     Key? key,
@@ -158,6 +167,7 @@ class DashboardUserManagementSubBar extends StatelessWidget {
     this.filterControl,
     this.onAddPressed,
     this.addLabel = '+ Ajouter',
+    this.subTabCount = 4,
   }) : super(key: key);
 
   @override
@@ -171,13 +181,10 @@ class DashboardUserManagementSubBar extends StatelessWidget {
       padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 6),
       child: Row(
         children: [
-          _buildSubNavItem(context, 'Gestionnaires', 0),
+          for (int i = 0; i < subTabCount; i++) ...[
-          const SizedBox(width: 12),
+            if (i > 0) const SizedBox(width: 12),
-          _buildSubNavItem(context, 'Parents', 1),
+            _buildSubNavItem(context, _tabLabels[i], i),
-          const SizedBox(width: 12),
+          ],
-          _buildSubNavItem(context, 'Assistantes maternelles', 2),
-          const SizedBox(width: 12),
-          _buildSubNavItem(context, 'Administrateurs', 3),
           const SizedBox(width: 36),
           _pillField(
             width: 320,

frontend/lib/widgets/admin/user_management_panel.dart

@@ -6,15 +6,20 @@ import 'package:p_tits_pas/widgets/admin/dashboard_admin.dart';
 import 'package:p_tits_pas/widgets/admin/gestionnaire_management_widget.dart';
 import 'package:p_tits_pas/widgets/admin/parent_managmant_widget.dart';
 
-class AdminUserManagementPanel extends StatefulWidget {
+class UserManagementPanel extends StatefulWidget {
-  const AdminUserManagementPanel({super.key});
+  /// Afficher l'onglet Administrateurs (sinon 3 onglets : Gestionnaires, Parents, AM).
+  final bool showAdministrateursTab;
+
+  const UserManagementPanel({
+    super.key,
+    this.showAdministrateursTab = true,
+  });
 
   @override
-  State<AdminUserManagementPanel> createState() =>
+  State<UserManagementPanel> createState() => _UserManagementPanelState();
-      _AdminUserManagementPanelState();
 }
 
-class _AdminUserManagementPanelState extends State<AdminUserManagementPanel> {
+class _UserManagementPanelState extends State<UserManagementPanel> {
   int _subIndex = 0;
   int _gestionnaireRefreshTick = 0;
   int _adminRefreshTick = 0;
@@ -44,8 +49,9 @@ class _AdminUserManagementPanelState extends State<AdminUserManagementPanel> {
   }
 
   void _onSubTabChange(int index) {
+    final maxIndex = widget.showAdministrateursTab ? 3 : 2;
     setState(() {
-      _subIndex = index;
+      _subIndex = index.clamp(0, maxIndex);
       _searchController.clear();
       _parentStatus = null;
       _amCapacityController.clear();
@@ -161,6 +167,7 @@ class _AdminUserManagementPanelState extends State<AdminUserManagementPanel> {
 
   @override
   Widget build(BuildContext context) {
+    final subTabCount = widget.showAdministrateursTab ? 4 : 3;
     return Column(
       children: [
         DashboardUserManagementSubBar(
@@ -171,6 +178,7 @@ class _AdminUserManagementPanelState extends State<AdminUserManagementPanel> {
           filterControl: _subBarFilterControl(),
           onAddPressed: _handleAddPressed,
           addLabel: 'Ajouter',
+          subTabCount: subTabCount,
         ),
         Expanded(child: _buildBody()),
       ],