feat(#138,#143,#144): fiche enfant admin, consentement photo et fix gestionnaire.

Squash merge develop → master.
- #138 : modale enfant paysage, zone AM/scolarisation, liens responsables
- #144 : persistance consent_photo à l'inscription enfant
- #143 : masquer Supprimer sur la propre fiche gestionnaire

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

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

@@ -64,6 +64,7 @@ class AdminChildrenAffiliationPanel extends StatelessWidget {
                 final c = children[i];
                 return AdminEnfantUserCard.fromSummary(
                   c,
+                  onCardTap: () => onOpen(c),
                   actions: [
                     IconButton(
                       icon: const Icon(Icons.visibility_outlined),

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

@@ -14,6 +14,7 @@ class AdminUserCard extends StatefulWidget {
   final Color? infoColor;
   final String? vigilanceTooltip;
   final VoidCallback? onCardTap;
+  final EdgeInsetsGeometry? margin;
 
   const AdminUserCard({
     super.key,
@@ -28,6 +29,7 @@ class AdminUserCard extends StatefulWidget {
     this.infoColor,
     this.vigilanceTooltip,
     this.onCardTap,
+    this.margin,
   });
 
   @override
@@ -59,7 +61,7 @@ class _AdminUserCardState extends State<AdminUserCard> {
           borderRadius: BorderRadius.circular(10),
           hoverColor: const Color(0x149CC5C0),
           child: Card(
-            margin: const EdgeInsets.only(bottom: 12),
+            margin: widget.margin ?? const EdgeInsets.only(bottom: 12),
             elevation: 0,
             color: widget.backgroundColor,
             shape: RoundedRectangleBorder(