add token session login

lib/main.dart

@@ -1,19 +1,34 @@
 import 'package:flutter/material.dart';
-import 'screens/login_screen.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
-void main() {
+import 'screens/login_screen.dart';
-  runApp(MyApp());
+import 'screens/camera_screen.dart';
+
+Future<void> main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  final SharedPreferences prefs = await SharedPreferences.getInstance();
+  final String? token = prefs.getString("auth_token");
+
+  runApp(MyApp(isLoggedIn: token != null && token.isNotEmpty));
 }
 
 class MyApp extends StatelessWidget {
-  const MyApp({super.key});
+  final bool isLoggedIn;
+
+  const MyApp({
+    super.key,
+    required this.isLoggedIn,
+  });
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       debugShowCheckedModeBanner: false,
       title: 'Object Detector Assist',
-      home: LoginScreen(),
+      home: isLoggedIn
+          ? const CameraScreen()
+          : const LoginScreen(),
     );
   }
 }

lib/services/api_config.dart

@@ -5,7 +5,7 @@ class ApiConfig {
   static const bool useAndroidEmulator = false;
 
   // Ganti IP ini dengan IP laptop/PC Anda saat menggunakan HP fisik (ADB).
-  static const String deviceHost = "192.168.18.14:8000";
+  static const String deviceHost = "192.168.110.147:8000";
 
   static String get baseUrl {
     if (Platform.isAndroid && useAndroidEmulator) {
@@ -14,3 +14,4 @@ class ApiConfig {
     return "http://$deviceHost";
   }
 }
+

lib/services/auth_service.dart

@@ -54,4 +54,19 @@ class AuthService {
     final SharedPreferences prefs = await SharedPreferences.getInstance();
     await prefs.setString(_tokenKey, token);
   }
+
+  Future<String?> getToken() async {
+    final SharedPreferences prefs = await SharedPreferences.getInstance();
+    return prefs.getString(_tokenKey);
+  }
+
+  Future<bool> isLoggedIn() async {
+    final String? token = await getToken();
+    return token != null && token.isNotEmpty;
+  }
+
+  Future<void> logout() async {
+    final SharedPreferences prefs = await SharedPreferences.getInstance();
+    await prefs.remove(_tokenKey);
+  }
 }

test/widget_test.dart

@@ -13,7 +13,7 @@ import 'package:smart_vision_assist/main.dart';
 void main() {
   testWidgets('Counter increments smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(MyApp());
+    await tester.pumpWidget(const MyApp(isLoggedIn: false));
 
     // Verify that our counter starts at 0.
     expect(find.text('0'), findsOneWidget);