fix(am): hauteur modale fiche AM par onglet (sans scroll inutile).

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

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

@@ -69,29 +69,6 @@ class _AdminAmEditModalState extends State<AdminAmEditModal>
   static const double _proTabHeight = 300;
   static const List<int> _photoProRowLayout = [2, 2, 2];
 
-  /// Hauteur onglet enfants : champs + titre + grille 2×2 (+ alerte places si besoin).
-  double _childrenTabHeight() {
-    const capacityFields = 72.0;
-    const titleSection = 40.0;
-    const inconsistencyExtra = 46.0;
-    var h = capacityFields +
-        titleSection +
-        AdminAmChildrenCapacityGrid.fixedHeight;
-    if (_placesInconsistent()) h += inconsistencyExtra;
-    return h + 4;
-  }
-
-  double _tabViewHeight(int index) {
-    switch (index) {
-      case 1:
-        return _proTabHeight;
-      case 2:
-        return _childrenTabHeight();
-      default:
-        return 292;
-    }
-  }
-
   @override
   void initState() {
     super.initState();
@@ -541,8 +518,7 @@ class _AdminAmEditModalState extends State<AdminAmEditModal>
 
 
   Widget _identityTab() {
-    return SingleChildScrollView(
+    return IdentityBlock.editable(
-      child: IdentityBlock.editable(
       title: 'Identité et coordonnées',
       nomController: _nomCtrl,
       prenomController: _prenomCtrl,
@@ -551,7 +527,6 @@ class _AdminAmEditModalState extends State<AdminAmEditModal>
       adresseController: _adresseCtrl,
       codePostalController: _cpCtrl,
       villeController: _villeCtrl,
-      ),
     );
   }
 
@@ -610,7 +585,9 @@ class _AdminAmEditModalState extends State<AdminAmEditModal>
     return LayoutBuilder(
       builder: (context, c) {
         final maxRowW = c.maxWidth;
-        final maxRowH = c.maxHeight;
+        // Hauteur bornée : l’onglet pro a une hauteur fixe (photo ID).
+        final maxRowH =
+            c.maxHeight.isFinite ? c.maxHeight : _proTabHeight;
         final bodyH = maxRowH;
         final idealPhotoW = bodyH * AdminAmPhotoFrame.idPhotoAspectRatio + 16;
         final maxPhotoW = (maxRowW - _photoProGap - _proColumnMinWidth)
@@ -659,6 +636,18 @@ class _AdminAmEditModalState extends State<AdminAmEditModal>
     );
   }
 
+  /// Corps de l’onglet actif — hauteur naturelle (pas de TabBarView).
+  Widget _buildActiveTabBody() {
+    switch (_tabCtrl.index) {
+      case 1:
+        return SizedBox(height: _proTabHeight, child: _proTab());
+      case 2:
+        return _childrenTab();
+      default:
+        return _identityTab();
+    }
+  }
+
   Widget _childrenCapacityFields() {
     final inconsistent = _placesInconsistent();
     return Column(
@@ -867,15 +856,13 @@ class _AdminAmEditModalState extends State<AdminAmEditModal>
             const Divider(height: 1),
             Padding(
               padding: const EdgeInsets.fromLTRB(20, 12, 20, 0),
-              child: SizedBox(
+              child: AnimatedSize(
-                height: _tabViewHeight(_tabCtrl.index),
+                duration: const Duration(milliseconds: 180),
-                child: TabBarView(
+                curve: Curves.easeInOut,
-                  controller: _tabCtrl,
+                alignment: Alignment.topCenter,
-                  children: [
+                child: KeyedSubtree(
-                    _identityTab(),
+                  key: ValueKey<int>(_tabCtrl.index),
-                    _proTab(),
+                  child: _buildActiveTabBody(),
-                    _childrenTab(),
-                  ],
                 ),
               ),
             ),