branch backend + ajout du serveur backend, next, et sqlite

lib/features/home/home_screen.dart

@@ -12,6 +12,7 @@ import '../../data/repositories/session_repository.dart';
 import '../capture/capture_screen.dart';
 import '../history/history_screen.dart';
 import '../statistics/statistics_screen.dart';
+import '../settings/settings_screen.dart';
 import 'widgets/stats_card.dart';
 
 class HomeScreen extends StatefulWidget {
@@ -58,6 +59,11 @@ class _HomeScreenState extends State<HomeScreen> {
             onPressed: () => _navigateToHistory(context),
             tooltip: 'Historique',
           ),
+          IconButton(
+            icon: const Icon(Icons.settings),
+            onPressed: () => _navigateToSettings(context),
+            tooltip: 'Paramètres',
+          ),
         ],
       ),
       body: RefreshIndicator(
@@ -237,4 +243,11 @@ class _HomeScreenState extends State<HomeScreen> {
     // Refresh stats when returning
     _loadStats();
   }
+
+  void _navigateToSettings(BuildContext context) {
+    Navigator.push(
+      context,
+      MaterialPageRoute(builder: (_) => const SettingsScreen()),
+    );
+  }
 }