feat(#140): fiches admin famille — IdentityBlock, parsing enfants et avatars web

Extrait IdentityBlock réutilisable, aligne les modales parent/enfant sur le style validation, corrige le parsing parentChildren et les URLs /uploads en Flutter web.

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

frontend/lib/widgets/admin/validation_family_wizard.dart

@@ -3,11 +3,10 @@ import 'package:flutter/gestures.dart';
 import 'package:google_fonts/google_fonts.dart';
 import 'package:p_tits_pas/models/dossier_unifie.dart';
 import 'package:p_tits_pas/utils/date_display_utils.dart';
-import 'package:p_tits_pas/utils/phone_utils.dart';
 import 'package:p_tits_pas/services/user_service.dart';
 import 'package:p_tits_pas/services/api/api_config.dart';
-import 'package:p_tits_pas/widgets/admin/common/admin_detail_modal.dart';
 import 'package:p_tits_pas/widgets/admin/common/validation_detail_section.dart';
+import 'package:p_tits_pas/widgets/common/identity_block.dart';
 import 'package:p_tits_pas/widgets/common/auth_network_image.dart';
 import 'validation_modal_theme.dart';
 import 'validation_refus_form.dart';
@@ -108,26 +107,6 @@ class _ValidationFamilyWizardState extends State<ValidationFamilyWizard> {
   static String _formatBirthDate(String? s) =>
       formatIsoDateFr(s, ifEmpty: 'Non défini');
 
-  /// Même ordre et disposition que le formulaire de création (Nom/Prénom, Tél/Email, Adresse, CP/Ville).
-  List<AdminDetailField> _parentFields(ParentDossier p) => [
-        AdminDetailField(label: 'Nom', value: _v(p.nom)),
-        AdminDetailField(label: 'Prénom', value: _v(p.prenom)),
-        AdminDetailField(
-            label: 'Téléphone',
-            value: _v(p.telephone) != 'Non défini'
-                ? formatPhoneForDisplay(_v(p.telephone))
-                : 'Non défini'),
-        AdminDetailField(label: 'Email', value: _v(p.email)),
-        AdminDetailField(label: 'Adresse (N° et Rue)', value: _v(p.adresse)),
-        AdminDetailField(label: 'Code postal', value: _v(p.codePostal)),
-        AdminDetailField(label: 'Ville', value: _v(p.ville)),
-      ];
-
-  static const List<int> _parentRowLayout = [2, 2, 1, 2];
-  static const Map<int, List<int>> _parentRowFlex = {
-    3: [2, 5]
-  }; // Code postal étroit, Ville large
-
   static String _fullPhotoUrl(String? url) => ApiConfig.absoluteMediaUrl(url);
 
   @override
@@ -153,11 +132,9 @@ class _ValidationFamilyWizardState extends State<ValidationFamilyWizard> {
     final d = widget.dossier;
     switch (_step) {
       case 0:
-        return ValidationDetailSection(
+        return IdentityBlock.readOnlyFromParentDossier(
+          d.parents.first,
           title: 'Parent principal',
-          fields: _parentFields(d.parents.first),
-          rowLayout: _parentRowLayout,
-          rowFlex: _parentRowFlex,
         );
       case 1:
         return _buildParent2Step();
@@ -178,11 +155,9 @@ class _ValidationFamilyWizardState extends State<ValidationFamilyWizard> {
             style: TextStyle(color: Colors.black87)),
       );
     }
-    return ValidationDetailSection(
+    return IdentityBlock.readOnlyFromParentDossier(
+      widget.dossier.parents[1],
       title: 'Deuxième parent',
-      fields: _parentFields(widget.dossier.parents[1]),
-      rowLayout: _parentRowLayout,
-      rowFlex: _parentRowFlex,
     );
   }