fix(#146): densifier la liste et corriger l'affichage des responsables.

Les cartes compactes montrent plus d'enfants d'un coup ; le nom ne monopolise plus la largeur au détriment des infos.

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

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

@@ -35,6 +35,7 @@ class AdminEnfantUserCard extends StatelessWidget {
   final List<Widget> actions;
   final VoidCallback? onCardTap;
   final EdgeInsetsGeometry? margin;
+  final EdgeInsetsGeometry? contentPadding;
 
   const AdminEnfantUserCard({
     super.key,
@@ -44,6 +45,7 @@ class AdminEnfantUserCard extends StatelessWidget {
     this.actions = const [],
     this.onCardTap,
     this.margin,
+    this.contentPadding,
   });
 
   factory AdminEnfantUserCard.fromEnfant(
@@ -52,6 +54,7 @@ class AdminEnfantUserCard extends StatelessWidget {
     List<Widget> actions = const [],
     VoidCallback? onCardTap,
     EdgeInsetsGeometry? margin,
+    EdgeInsetsGeometry? contentPadding,
   }) {
     final parents = enfant.parentLinks
         .map((l) => l.parentName ?? 'Parent')
@@ -72,6 +75,7 @@ class AdminEnfantUserCard extends StatelessWidget {
       actions: actions,
       onCardTap: onCardTap,
       margin: margin,
+      contentPadding: contentPadding,
     );
   }
 
@@ -81,6 +85,7 @@ class AdminEnfantUserCard extends StatelessWidget {
     List<Widget> actions = const [],
     VoidCallback? onCardTap,
     EdgeInsetsGeometry? margin,
+    EdgeInsetsGeometry? contentPadding,
   }) {
     return AdminEnfantUserCard(
       title: child.fullName,
@@ -94,6 +99,7 @@ class AdminEnfantUserCard extends StatelessWidget {
       actions: actions,
       onCardTap: onCardTap,
       margin: margin,
+      contentPadding: contentPadding,
     );
   }
 
@@ -107,6 +113,7 @@ class AdminEnfantUserCard extends StatelessWidget {
       actions: actions,
       onCardTap: onCardTap,
       margin: margin,
+      contentPadding: contentPadding,
     );
   }
 }

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

@@ -53,7 +53,11 @@ class AdminSelectEnfantModal {
         return AdminEnfantUserCard.fromEnfant(
           e,
           onCardTap: onSelect,
-          margin: const EdgeInsets.only(bottom: 6),
+          margin: const EdgeInsets.only(bottom: 4),
+          contentPadding: const EdgeInsets.symmetric(
+            horizontal: 10,
+            vertical: 5,
+          ),
           actions: [
             IconButton(
               icon: const Icon(Icons.add_link),

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

@@ -52,8 +52,8 @@ class AdminSelectListModal<T> extends StatefulWidget {
     this.emptyMessage = 'Aucun élément disponible',
     this.noResultsMessage = 'Aucun résultat pour cette recherche',
     this.modalWidth = 930,
-    this.cardExtent = 70,
-    this.minVisibleCards = 5,
+    this.cardExtent = 52,
+    this.minVisibleCards = 8,
     this.toggleFilter,
   });
 
@@ -71,8 +71,8 @@ class AdminSelectListModal<T> extends StatefulWidget {
     String emptyMessage = 'Aucun élément disponible',
     String noResultsMessage = 'Aucun résultat pour cette recherche',
     double modalWidth = 930,
-    double cardExtent = 70,
-    int minVisibleCards = 5,
+    double cardExtent = 52,
+    int minVisibleCards = 8,
     AdminSelectToggleFilter<T>? toggleFilter,
   }) {
     return showDialog<T>(

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

@@ -15,6 +15,7 @@ class AdminUserCard extends StatefulWidget {
   final String? vigilanceTooltip;
   final VoidCallback? onCardTap;
   final EdgeInsetsGeometry? margin;
+  final EdgeInsetsGeometry? contentPadding;
 
   const AdminUserCard({
     super.key,
@@ -30,6 +31,7 @@ class AdminUserCard extends StatefulWidget {
     this.vigilanceTooltip,
     this.onCardTap,
     this.margin,
+    this.contentPadding,
   });
 
   @override
@@ -69,7 +71,8 @@ class _AdminUserCardState extends State<AdminUserCard> {
               side: BorderSide(color: widget.borderColor ?? Colors.grey.shade300),
             ),
             child: Padding(
-              padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 9),
+              padding: widget.contentPadding ??
+                  const EdgeInsets.symmetric(horizontal: 12, vertical: 9),
               child: Row(
                 children: [
                   _buildAvatar(avatarUrl),
@@ -88,7 +91,10 @@ class _AdminUserCardState extends State<AdminUserCard> {
                   Expanded(
                     child: Row(
                       children: [
+                        // flex: 0 → largeur du nom ; le reste va aux infos
+                        // (évite le partage 50/50 qui tronque « Responsables »).
                         Flexible(
+                          flex: 0,
                           fit: FlexFit.loose,
                           child: Text(
                             widget.title.isNotEmpty ? widget.title : 'Sans nom',