feat(dashboard-admin): connect admin dashboard to real API data (Ticket #92)

- Frontend:
  - Create UserService to handle user-related API calls (gestionnaires, parents, AMs, admins)
  - Update AdminDashboardScreen to use dynamic widgets
  - Implement dynamic management widgets:
    - GestionnaireManagementWidget
    - ParentManagementWidget
    - AssistanteMaternelleManagementWidget
    - AdminManagementWidget
  - Add data models: ParentModel, AssistanteMaternelleModel
  - Update AppUser model
  - Update ApiConfig

- Backend:
  - Update controllers (Parents, AMs, Gestionnaires, Users) to allow ADMINISTRATEUR role to list users
  - Note: Gestionnaires endpoint is currently bypassed in frontend (using /users filter) due to module import issue (documented in docs/92_NOTE-BACKEND-GESTIONNAIRES.md)

- Docs:
  - Add note about backend fix for Gestionnaires module
  - Update .cursorrules to forbid worktrees

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

frontend/lib/models/assistante_maternelle_model.dart

@@ -0,0 +1,30 @@
+import 'package:p_tits_pas/models/user.dart';
+
+class AssistanteMaternelleModel {
+  final AppUser user;
+  final String? approvalNumber;
+  final String? residenceCity;
+  final int? maxChildren;
+  final int? placesAvailable;
+
+  AssistanteMaternelleModel({
+    required this.user,
+    this.approvalNumber,
+    this.residenceCity,
+    this.maxChildren,
+    this.placesAvailable,
+  });
+
+  factory AssistanteMaternelleModel.fromJson(Map<String, dynamic> json) {
+    final userJson = json['user'] ?? json;
+    final user = AppUser.fromJson(userJson);
+    
+    return AssistanteMaternelleModel(
+      user: user,
+      approvalNumber: json['numero_agrement'] as String?,
+      residenceCity: json['ville_residence'] as String?,
+      maxChildren: json['nb_max_enfants'] as int?,
+      placesAvailable: json['place_disponible'] as int?,
+    );
+  }
+}

frontend/lib/models/parent_model.dart

@@ -0,0 +1,18 @@
+import 'package:p_tits_pas/models/user.dart';
+
+class ParentModel {
+  final AppUser user;
+  final int childrenCount;
+
+  ParentModel({required this.user, this.childrenCount = 0});
+
+  factory ParentModel.fromJson(Map<String, dynamic> json) {
+    final userJson = json['user'] ?? json;
+    final user = AppUser.fromJson(userJson);
+    final children = json['parentChildren'] as List?;
+    return ParentModel(
+      user: user,
+      childrenCount: children?.length ?? 0,
+    );
+  }
+}

frontend/lib/models/user.dart

@@ -5,6 +5,14 @@ class AppUser {
   final DateTime createdAt;
   final DateTime updatedAt;
   final bool changementMdpObligatoire;
+  final String? nom;
+  final String? prenom;
+  final String? statut;
+  final String? telephone;
+  final String? photoUrl;
+  final String? adresse;
+  final String? ville;
+  final String? codePostal;
 
   AppUser({
     required this.id,
@@ -13,6 +21,14 @@ class AppUser {
     required this.createdAt,
     required this.updatedAt,
     this.changementMdpObligatoire = false,
+    this.nom,
+    this.prenom,
+    this.statut,
+    this.telephone,
+    this.photoUrl,
+    this.adresse,
+    this.ville,
+    this.codePostal,
   });
 
   factory AppUser.fromJson(Map<String, dynamic> json) {
@@ -20,13 +36,26 @@ class AppUser {
       id: json['id'] as String,
       email: json['email'] as String,
       role: json['role'] as String,
-      createdAt: json['createdAt'] != null
-          ? DateTime.parse(json['createdAt'] as String)
-          : DateTime.now(),
-      updatedAt: json['updatedAt'] != null
-          ? DateTime.parse(json['updatedAt'] as String)
-          : DateTime.now(),
-      changementMdpObligatoire: json['changement_mdp_obligatoire'] as bool? ?? false,
+      createdAt: json['cree_le'] != null
+          ? DateTime.parse(json['cree_le'] as String)
+          : (json['createdAt'] != null
+              ? DateTime.parse(json['createdAt'] as String)
+              : DateTime.now()),
+      updatedAt: json['modifie_le'] != null
+          ? DateTime.parse(json['modifie_le'] as String)
+          : (json['updatedAt'] != null
+              ? DateTime.parse(json['updatedAt'] as String)
+              : DateTime.now()),
+      changementMdpObligatoire:
+          json['changement_mdp_obligatoire'] as bool? ?? false,
+      nom: json['nom'] as String?,
+      prenom: json['prenom'] as String?,
+      statut: json['statut'] as String?,
+      telephone: json['telephone'] as String?,
+      photoUrl: json['photo_url'] as String?,
+      adresse: json['adresse'] as String?,
+      ville: json['ville'] as String?,
+      codePostal: json['code_postal'] as String?,
     );
   }
 
@@ -38,6 +67,16 @@ class AppUser {
       'createdAt': createdAt.toIso8601String(),
       'updatedAt': updatedAt.toIso8601String(),
       'changement_mdp_obligatoire': changementMdpObligatoire,
+      'nom': nom,
+      'prenom': prenom,
+      'statut': statut,
+      'telephone': telephone,
+      'photo_url': photoUrl,
+      'adresse': adresse,
+      'ville': ville,
+      'code_postal': codePostal,
     };
   }
-} 
+
+  String get fullName => '${prenom ?? ''} ${nom ?? ''}'.trim();
+}