espero que nao presisse mudar.

lib/main.dart

@@ -1,8 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart'; // Para as orientações
 import 'package:supabase_flutter/supabase_flutter.dart';
-import 'package:playmaker/classe/theme.dart'; 
+import 'package:playmaker/classe/theme.dart';
 import 'pages/login.dart';
+import 'utils/session_manager.dart';
 
 // Variável global para controlar o Tema
 final ValueNotifier<ThemeMode> themeNotifier = ValueNotifier(ThemeMode.system);
@@ -25,9 +26,41 @@ void main() async {
   runApp(const MyApp());
 }
 
-class MyApp extends StatelessWidget {
+class MyApp extends StatefulWidget {
   const MyApp({super.key});
-  
+
+  @override
+  State<MyApp> createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addObserver(this);
+  }
+
+  @override
+  void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
+    super.dispose();
+  }
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) async {
+    super.didChangeAppLifecycleState(state);
+    // Quando a app for para background/terminar, se houver sessão em progresso, desliga a sessão
+    if (state == AppLifecycleState.paused || state == AppLifecycleState.detached) {
+      final inProgress = await SessionManager.isInProgress();
+      if (inProgress) {
+        try {
+          await Supabase.instance.client.auth.signOut();
+          await SessionManager.clear();
+        } catch (_) {}
+      }
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return ValueListenableBuilder<ThemeMode>(