fix(#112): dates et places AM en reprise (resetForReprise)

Corrige l’ombre des paramètres dateOfBirth, agreementDate et placesAvailable
dans resetForReprise ; renforce le parsing reprise-dossier et ajoute un test.

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

frontend/lib/models/am_registration_data.dart

@@ -141,14 +141,14 @@ class AmRegistrationData extends ChangeNotifier {
     photoBytes = null;
     photoFilename = null;
     photoConsent = consentementPhoto;
-    dateOfBirth = dateOfBirth;
+    this.dateOfBirth = dateOfBirth;
     this.birthCity = birthCity;
     this.birthCountry = birthCountry;
     this.nir = nir;
     this.agrementNumber = agrementNumber;
-    agreementDate = agreementDate;
+    this.agreementDate = agreementDate;
     this.capacity = capacity;
-    placesAvailable = placesAvailable;
+    this.placesAvailable = placesAvailable;
     this.presentationText = presentationText;
     cguAccepted = false;
     notifyListeners();

frontend/lib/models/reprise_dossier.dart

@@ -64,7 +64,22 @@ class RepriseDossier {
   bool get isParent => role == 'parent';
   bool get isAm => role == 'assistante_maternelle';
 
+  static Map<String, dynamic>? _nestedMap(dynamic value) {
+    if (value is Map) return Map<String, dynamic>.from(value);
+    return null;
+  }
+
+  static dynamic _firstNonNull(List<dynamic> values) {
+    for (final v in values) {
+      if (v != null) return v;
+    }
+    return null;
+  }
+
   factory RepriseDossier.fromJson(Map<String, dynamic> json) {
+    final nestedUser = _nestedMap(json['user']);
+    final nestedDossier = _nestedMap(json['dossier']);
+
     final parentsRaw = json['parents'];
     final parentsList = parentsRaw is List
         ? parentsRaw
@@ -100,19 +115,64 @@ class RepriseDossier {
       texteMotivation: (json['texte_motivation'] ?? json['presentation_dossier'])
           ?.toString(),
       consentementPhoto: RepriseMapper.optionalBool(json['consentement_photo']) ||
-          RepriseMapper.optionalBool(json['consent_photo']),
-      dateNaissance: RepriseMapper.optionalDateString(json['date_naissance']),
-      lieuNaissanceVille: json['lieu_naissance_ville']?.toString(),
-      lieuNaissancePays: json['lieu_naissance_pays']?.toString(),
-      numeroAgrement: (json['numero_agrement'] ?? json['numero_agrement_am'])
-          ?.toString(),
-      nir: json['nir']?.toString(),
-      dateAgrement: RepriseMapper.optionalDateString(json['date_agrement']),
+          RepriseMapper.optionalBool(json['consent_photo']) ||
+          RepriseMapper.optionalBool(nestedUser?['consentement_photo']),
+      dateNaissance: RepriseMapper.optionalDateString(
+        _firstNonNull([
+          json['date_naissance'],
+          json['dateNaissance'],
+          nestedUser?['date_naissance'],
+          nestedUser?['dateNaissance'],
+        ]),
+      ),
+      lieuNaissanceVille: _firstNonNull([
+        json['lieu_naissance_ville'],
+        json['lieuNaissanceVille'],
+        nestedUser?['lieu_naissance_ville'],
+        nestedUser?['lieuNaissanceVille'],
+      ])?.toString(),
+      lieuNaissancePays: _firstNonNull([
+        json['lieu_naissance_pays'],
+        json['lieuNaissancePays'],
+        nestedUser?['lieu_naissance_pays'],
+        nestedUser?['lieuNaissancePays'],
+      ])?.toString(),
+      numeroAgrement: _firstNonNull([
+        json['numero_agrement'],
+        json['numero_agrement_am'],
+        json['numeroAgrement'],
+        nestedDossier?['numero_agrement'],
+        nestedDossier?['numeroAgrement'],
+      ])?.toString(),
+      nir: _firstNonNull([
+        json['nir'],
+        nestedDossier?['nir'],
+      ])?.toString(),
+      dateAgrement: RepriseMapper.optionalDateString(
+        _firstNonNull([
+          json['date_agrement'],
+          json['dateAgrement'],
+          nestedDossier?['date_agrement'],
+          nestedDossier?['dateAgrement'],
+        ]),
+      ),
       nbMaxEnfants: RepriseMapper.optionalInt(
-        json['nb_max_enfants'] ?? json['capacite_accueil'],
+        _firstNonNull([
+          json['nb_max_enfants'],
+          json['capacite_accueil'],
+          json['nbMaxEnfants'],
+          nestedDossier?['nb_max_enfants'],
+          nestedDossier?['capacite_accueil'],
+        ]),
       ),
       placeDisponible: RepriseMapper.optionalInt(
-        json['place_disponible'] ?? json['places_disponibles'],
+        _firstNonNull([
+          json['place_disponible'],
+          json['places_disponibles'],
+          json['placesDisponibles'],
+          nestedDossier?['place_disponible'],
+          nestedDossier?['places_disponibles'],
+        ]),
       ),
       biographie: (json['biographie'] ?? json['presentation'])?.toString(),
     );