fix: i forgot lol

lib/domain/models/return_owner.dart

@@ -0,0 +1,11 @@
+import 'package:seshat/domain/models/book_instance.dart';
+import 'package:seshat/domain/models/owner.dart';
+
+class ReturnOwner {
+  ReturnOwner(this.owner, this.owned, this.ownedMoney);
+  Owner owner;
+  List<BookInstance> owned;
+  double ownedMoney;
+
+  // factory ReturnOwner.fromJSON(Map<String, dynamic>) {}
+}

lib/ui/bal_page/widget/ended/bal_ended_screen.dart

@@ -2,17 +2,46 @@ import 'package:flutter/material.dart';
 import 'package:seshat/ui/bal_page/view_model/bal_view_model.dart';
 import 'package:seshat/ui/core/ui/navigation_bar.dart';
 
-class BalEndedScreen extends StatelessWidget {
+class BalEndedScreen extends StatefulWidget {
   const BalEndedScreen({super.key, required this.viewModel});
 
   final BalViewModel viewModel;
 
+  @override
+  State<BalEndedScreen> createState() => _BalEndedScreenState();
+}
+
+class _BalEndedScreenState extends State<BalEndedScreen>
+    with TickerProviderStateMixin {
+  late final TabController tabController;
+
+  @override
+  void initState() {
+    super.initState();
+    tabController = TabController(length: 2, vsync: this);
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       bottomNavigationBar: AppNavigationBar(startIndex: 0),
-      appBar: AppBar(title: Text(viewModel.bal!.name)),
-      body: Center(child: Text("Coming Soon.")),
+      appBar: AppBar(
+        title: Text(widget.viewModel.bal!.name),
+        bottom: TabBar(
+          controller: tabController,
+          tabs: [
+            Tab(text: "Statistiques"),
+            Tab(text: "Livres à rendre"),
+          ],
+        ),
+      ),
+      body: TabBarView(
+        controller: tabController,
+        children: [
+          Center(child: Text("Coming soon")),
+          Center(child: Text("Coming soon.")),
+        ],
+      ),
     );
   }
 }