feat(#152): suppression complète grossesse multiple / est_multiple.

Retire le champ partout : BDD (migration + seed), entity/DTO/services Nest,
modèles et payloads Flutter, scripts de test et docs. Back et front alignés
(forbidNonWhitelisted). Aucun fantôme de compat.

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

frontend/lib/models/dossier_unifie.dart

@@ -185,7 +185,6 @@ class EnfantDossier {
   final String? dueDate;
   final String? photoUrl;
   final bool consentPhoto;
-  final bool estMultiple;
 
   EnfantDossier({
     required this.id,
@@ -197,7 +196,6 @@ class EnfantDossier {
     this.dueDate,
     this.photoUrl,
     this.consentPhoto = false,
-    this.estMultiple = false,
   });
 
   String get fullName => '${firstName ?? ''} ${lastName ?? ''}'.trim();
@@ -231,8 +229,6 @@ class EnfantDossier {
       photoUrl: resolvedPhoto,
       consentPhoto:
           json['consent_photo'] == true || json['consentPhoto'] == true,
-      estMultiple:
-          json['est_multiple'] == true || json['estMultiple'] == true,
     );
   }
 }

frontend/lib/models/enfant_admin_model.dart

@@ -12,7 +12,6 @@ class EnfantAdminModel {
   final String status;
   final String? photoUrl;
   final bool consentPhoto;
-  final bool isMultiple;
   final List<EnfantParentLink> parentLinks;
   /// Flag API #157 (sinon déduit de [parentLinks]).
   final bool? sansResponsable;
@@ -27,7 +26,6 @@ class EnfantAdminModel {
     required this.status,
     this.photoUrl,
     this.consentPhoto = false,
-    this.isMultiple = false,
     this.parentLinks = const [],
     this.sansResponsable,
   });
@@ -56,7 +54,6 @@ class EnfantAdminModel {
     String? status,
     String? photoUrl,
     bool? consentPhoto,
-    bool? isMultiple,
     List<EnfantParentLink>? parentLinks,
     bool? sansResponsable,
   }) {
@@ -70,7 +67,6 @@ class EnfantAdminModel {
       status: status ?? this.status,
       photoUrl: photoUrl ?? this.photoUrl,
       consentPhoto: consentPhoto ?? this.consentPhoto,
-      isMultiple: isMultiple ?? this.isMultiple,
       parentLinks: parentLinks ?? this.parentLinks,
       sansResponsable: sansResponsable ?? this.sansResponsable,
     );
@@ -111,8 +107,6 @@ class EnfantAdminModel {
       ),
       photoUrl: photoUrl,
       consentPhoto: consentPhoto,
-      isMultiple: _parseBool(json['is_multiple']) ||
-          _parseBool(json['est_multiple']),
       parentLinks: links,
       sansResponsable: sansResponsable,
     );
@@ -127,7 +121,6 @@ class EnfantAdminModel {
       if (birthDate != null && birthDate!.isNotEmpty) 'birth_date': birthDate,
       if (dueDate != null && dueDate!.isNotEmpty) 'due_date': dueDate,
       'consent_photo': consentPhoto,
-      'is_multiple': isMultiple,
     };
   }
 

frontend/lib/models/parent_user_registration_data.dart

@@ -30,7 +30,6 @@ class ChildData {
   String lastName;
   String dob; // Date de naissance ou prévisionnelle
   bool photoConsent;
-  bool multipleBirth;
   bool isUnbornChild;
   File? imageFile;
   CardColorVertical cardColor; // Nouveau champ pour la couleur de la carte
@@ -40,7 +39,6 @@ class ChildData {
     this.lastName = '',
     this.dob = '',
     this.photoConsent = false,
-    this.multipleBirth = false,
     this.isUnbornChild = false,
     this.imageFile,
     required this.cardColor, // Rendre requis dans le constructeur

frontend/lib/models/user_registration_data.dart

@@ -38,7 +38,6 @@ class ChildData {
   /// Valeurs API : `H`, `F`, `Autre` (GenreType backend). Vide tant que non choisi.
   String genre;
   bool photoConsent;
-  bool multipleBirth;
   bool isUnbornChild;
   File? imageFile;
   /// Octets de la photo (fiable à l’envoi API ; [imageFile] peut être absent sur le web).
@@ -55,7 +54,6 @@ class ChildData {
     this.dob = '',
     this.genre = '',
     this.photoConsent = false,
-    this.multipleBirth = false,
     this.isUnbornChild = false,
     this.imageFile,
     this.imageBytes,
@@ -70,7 +68,6 @@ class ChildData {
     String? dob,
     String? genre,
     bool? photoConsent,
-    bool? multipleBirth,
     bool? isUnbornChild,
     Object? imageFile = _unsetImage,
     Object? imageBytes = _unsetImageBytes,
@@ -84,7 +81,6 @@ class ChildData {
       dob: dob ?? this.dob,
       genre: genre ?? this.genre,
       photoConsent: photoConsent ?? this.photoConsent,
-      multipleBirth: multipleBirth ?? this.multipleBirth,
       isUnbornChild: isUnbornChild ?? this.isUnbornChild,
       imageFile: identical(imageFile, _unsetImage) ? this.imageFile : imageFile as File?,
       imageBytes:

frontend/lib/screens/auth/parent_register_step3_screen.dart

@@ -121,7 +121,6 @@ class _ParentRegisterStep3ScreenState extends State<ParentRegisterStep3Screen> {
         dob: '',
         isUnbornChild: false,
         photoConsent: false,
-        multipleBirth: false,
         cardColor: cardColor,
       );
       registrationData.addChild(newChild);

frontend/lib/utils/parent_registration_payload.dart

@@ -166,7 +166,6 @@ class ParentRegistrationPayload {
   static Map<String, dynamic> _childToJson(ChildData c, int index, String parentNom) {
     final map = <String, dynamic>{
       'genre': apiGenres.contains(c.genre) ? c.genre : 'Autre',
-      'grossesse_multiple': c.multipleBirth,
       'consent_photo': c.photoConsent,
     };
 

frontend/lib/utils/reprise_mapper.dart

@@ -44,7 +44,6 @@ class RepriseMapper {
       dob: dob,
       genre: e.gender ?? '',
       photoConsent: e.consentPhoto,
-      multipleBirth: e.estMultiple,
       isUnbornChild: isUnborn,
       cardColor: _childCardColors[index % _childCardColors.length],
       repriseChildId: e.id,

frontend/lib/widgets/admin/common/admin_child_detail_modal.dart

@@ -55,7 +55,6 @@ class _AdminChildDetailModalState extends State<AdminChildDetailModal> {
   late String _status;
   late String? _gender;
   late bool _consentPhoto;
-  late bool _isMultiple;
   bool _dirty = false;
   bool _saving = false;
   bool _deleting = false;
@@ -142,7 +141,6 @@ class _AdminChildDetailModalState extends State<AdminChildDetailModal> {
       _gender = _normalizeGender(e?.gender, allowUnknown: _isUnborn);
     }
     _consentPhoto = e?.consentPhoto ?? false;
-    _isMultiple = e?.isMultiple ?? false;
     for (final c in [_prenomCtrl, _nomCtrl]) {
       c.addListener(_onNameChanged);
     }
@@ -383,7 +381,6 @@ class _AdminChildDetailModalState extends State<AdminChildDetailModal> {
           else if (_dateToIso(_birthCtrl.text) != null)
             'birth_date': _dateToIso(_birthCtrl.text),
           'consent_photo': _consentPhoto,
-          'is_multiple': _isMultiple,
         },
       );
       if (!mounted) return;
@@ -460,7 +457,6 @@ class _AdminChildDetailModalState extends State<AdminChildDetailModal> {
               'birth_date': _dateToIso(_birthCtrl.text),
           },
           'consent_photo': _consentPhoto,
-          'is_multiple': _isMultiple,
         },
       );
       if (!mounted) return;

frontend/lib/widgets/admin/parent_dossier_wizard.dart

@@ -1466,7 +1466,6 @@ class _ParentDossierWizardState extends State<ParentDossierWizard> {
     final map = <String, dynamic>{
       'genre': c.genre,
       'consent_photo': true,
-      'grossesse_multiple': false,
     };
 
     if (prenom.length >= 2) {
@@ -1723,7 +1722,6 @@ class _ParentDossierWizardState extends State<ParentDossierWizard> {
       'status': status,
       'gender': gender,
       'consent_photo': true,
-      'is_multiple': false,
     };
     if (prenom.length >= 2) map['first_name'] = prenom;
     if (nom.length >= 2) map['last_name'] = nom;