diff --git a/.gitignore b/.gitignore
index e2abf47..0633bed 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,7 +32,7 @@ migrate_working_dir/
 .flutter-plugins-dependencies
 .pub-cache/
 .pub/
-/build/
+app/build/
 
 # Symbolication related
 app.*.symbols
diff --git a/app/android/app/build.gradle.kts b/app/android/app/build.gradle.kts
index b5b3e7c..d99e12e 100644
--- a/app/android/app/build.gradle.kts
+++ b/app/android/app/build.gradle.kts
@@ -8,7 +8,7 @@ plugins {
 android {
     namespace = "com.fernalabs.ferna.ferna"
     compileSdk = flutter.compileSdkVersion
-    ndkVersion = flutter.ndkVersion
+    ndkVersion = "27.0.12077973"
 
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_11
diff --git a/app/lib/main.dart b/app/lib/main.dart
index 7b7f5b6..3a0105a 100644
--- a/app/lib/main.dart
+++ b/app/lib/main.dart
@@ -1,122 +1,48 @@
+import 'package:ferna/providers/auth_provider.dart';
+import 'package:ferna/screens/login_screen.dart';
+import 'package:ferna/theme/theme_data.dart';
 import 'package:flutter/material.dart';
-
-void main() {
-  runApp(const MyApp());
+import 'package:provider/provider.dart';
+
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  // Initialzie auth provider
+  final authProvider = await AuthProvider.initialize();
+
+  runApp(
+    MultiProvider(
+      providers: [
+        ChangeNotifierProvider<AuthProvider>.value(value: authProvider),
+      ],
+      child: FernaApp(),
+    ),
+  );
 }
 
-class MyApp extends StatelessWidget {
-  const MyApp({super.key});
+class FernaApp extends StatelessWidget {
+  const FernaApp({super.key});
 
-  // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter Demo',
-      theme: ThemeData(
-        // This is the theme of your application.
-        //
-        // TRY THIS: Try running your application with "flutter run". You'll see
-        // the application has a purple toolbar. Then, without quitting the app,
-        // try changing the seedColor in the colorScheme below to Colors.green
-        // and then invoke "hot reload" (save your changes or press the "hot
-        // reload" button in a Flutter-supported IDE, or press "r" if you used
-        // the command line to start the app).
-        //
-        // Notice that the counter didn't reset back to zero; the application
-        // state is not lost during the reload. To reset the state, use hot
-        // restart instead.
-        //
-        // This works for code too, not just values: Most code changes can be
-        // tested with just a hot reload.
-        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
-      ),
-      home: const MyHomePage(title: 'Flutter Demo Home Page'),
+      title: 'Ferna',
+      debugShowCheckedModeBanner: false,
+      theme: FernaTheme.light,
+      darkTheme: FernaTheme.dark,
+      themeMode: ThemeMode.system,
+      // TODO: Replace with router
+      home: const LoginScreen(),
+      routes: {'/home': (_) => const HomeScreen()},
     );
   }
 }
 
-class MyHomePage extends StatefulWidget {
-  const MyHomePage({super.key, required this.title});
-
-  // This widget is the home page of your application. It is stateful, meaning
-  // that it has a State object (defined below) that contains fields that affect
-  // how it looks.
-
-  // This class is the configuration for the state. It holds the values (in this
-  // case the title) provided by the parent (in this case the App widget) and
-  // used by the build method of the State. Fields in a Widget subclass are
-  // always marked "final".
-
-  final String title;
-
-  @override
-  State<MyHomePage> createState() => _MyHomePageState();
-}
-
-class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
-
-  void _incrementCounter() {
-    setState(() {
-      // This call to setState tells the Flutter framework that something has
-      // changed in this State, which causes it to rerun the build method below
-      // so that the display can reflect the updated values. If we changed
-      // _counter without calling setState(), then the build method would not be
-      // called again, and so nothing would appear to happen.
-      _counter++;
-    });
-  }
+class HomeScreen extends StatelessWidget {
+  const HomeScreen({super.key});
 
   @override
   Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
-    // by the _incrementCounter method above.
-    //
-    // The Flutter framework has been optimized to make rerunning build methods
-    // fast, so that you can just rebuild anything that needs updating rather
-    // than having to individually change instances of widgets.
-    return Scaffold(
-      appBar: AppBar(
-        // TRY THIS: Try changing the color here to a specific color (to
-        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
-        // change color while the other colors stay the same.
-        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        // Here we take the value from the MyHomePage object that was created by
-        // the App.build method, and use it to set our appbar title.
-        title: Text(widget.title),
-      ),
-      body: Center(
-        // Center is a layout widget. It takes a single child and positions it
-        // in the middle of the parent.
-        child: Column(
-          // Column is also a layout widget. It takes a list of children and
-          // arranges them vertically. By default, it sizes itself to fit its
-          // children horizontally, and tries to be as tall as its parent.
-          //
-          // Column has various properties to control how it sizes itself and
-          // how it positions its children. Here we use mainAxisAlignment to
-          // center the children vertically; the main axis here is the vertical
-          // axis because Columns are vertical (the cross axis would be
-          // horizontal).
-          //
-          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
-          // action in the IDE, or press "p" in the console), to see the
-          // wireframe for each widget.
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            const Text('You have pushed the button this many times:'),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headlineMedium,
-            ),
-          ],
-        ),
-      ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: const Icon(Icons.add),
-      ), // This trailing comma makes auto-formatting nicer for build methods.
-    );
+    return const Placeholder(child: Text(":)"));
   }
 }
diff --git a/app/lib/providers/auth_provider.dart b/app/lib/providers/auth_provider.dart
new file mode 100644
index 0000000..4bcd21e
--- /dev/null
+++ b/app/lib/providers/auth_provider.dart
@@ -0,0 +1,80 @@
+import 'package:ferna/services/http_client.dart';
+import 'package:flutter/material.dart';
+// ignore: unused_import
+import 'package:provider/provider.dart';
+
+import '../services/auth_service.dart';
+import '../services/storage_service.dart';
+
+class AuthProvider with ChangeNotifier {
+  final AuthService _authService = AuthService.instance;
+  AuthProvider._();
+  bool _isLoading = false;
+  bool get isLoading => _isLoading;
+  String _serverUrl = '';
+  String get serverUrl => _serverUrl;
+
+  // Must call this before using any other AuthProvider methods.
+  static Future<AuthProvider> initialize() async {
+    final provider = AuthProvider._();
+
+    // Load saved serverUrl or use a default.
+    final savedUrl = await StorageService.getServerUrl();
+    provider._serverUrl = savedUrl ?? 'http://ferna.local';
+
+    // Initialize AuthService (sets up Dio & loads any persisted cookies).
+    await provider._authService.initialize(serverUrl: provider._serverUrl);
+
+    return provider;
+  }
+
+  /// Change serverUrl, persist it, and re-initialize Dio so its baseUrl updates.
+  Future<void> updateServerUrl(String newUrl) async {
+    if (newUrl == _serverUrl) return;
+
+    _serverUrl = newUrl;
+    notifyListeners();
+
+    // Persist the new URL:
+    await StorageService.saveServerUrl(newUrl);
+
+    // Re-init only Dio’s baseUrl; reuse the same cookieJar
+    await HttpClient.instance.init(baseUrl: _serverUrl);
+
+    notifyListeners();
+  }
+
+  Future<void> login({required String email, required String password}) async {
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      await _authService.login(email: email, password: password);
+      _isLoading = false;
+      notifyListeners();
+    } catch (e) {
+      _isLoading = false;
+      notifyListeners();
+      rethrow;
+    }
+  }
+
+  Future<int> signUp({required String email, required String password}) async {
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      final userId = await _authService.signup(
+        email: email,
+        password: password,
+      );
+      _isLoading = false;
+      notifyListeners();
+      return userId;
+    } catch (e) {
+      _isLoading = false;
+      notifyListeners();
+      rethrow;
+    }
+  }
+}
diff --git a/app/lib/screens/login_screen.dart b/app/lib/screens/login_screen.dart
new file mode 100644
index 0000000..6573054
--- /dev/null
+++ b/app/lib/screens/login_screen.dart
@@ -0,0 +1,448 @@
+import 'package:ferna/providers/auth_provider.dart';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+class LoginScreen extends StatefulWidget {
+  const LoginScreen({super.key});
+
+  @override
+  State<LoginScreen> createState() => _LoginScreenState();
+}
+
+class _LoginScreenState extends State<LoginScreen>
+    with SingleTickerProviderStateMixin {
+  static const _animationDuration = Duration(milliseconds: 300);
+
+  final _formKey = GlobalKey<FormState>();
+
+  // Controllers for the form fields.
+  final TextEditingController _emailController = TextEditingController();
+  final TextEditingController _passwordController = TextEditingController();
+  final TextEditingController _confirmPasswordController =
+      TextEditingController();
+  final TextEditingController _serverUrlController = TextEditingController(
+    text: 'https://ferna.local',
+  );
+
+  bool _obscurePassword = true;
+  bool _obscureConfirm = true;
+  bool _isLogin = true; // Toggle between “Login” and “Sign Up”
+
+  @override
+  void dispose() {
+    _emailController.dispose();
+    _passwordController.dispose();
+    _confirmPasswordController.dispose();
+    _serverUrlController.dispose();
+    super.dispose();
+  }
+
+  void _showServerConfigDialog() {
+    final auth = context.read<AuthProvider>();
+    final theme = Theme.of(context);
+    showDialog(
+      context: context,
+      builder: (context) {
+        return AlertDialog(
+          title: const Text('Configure Server'),
+          content: TextFormField(
+            controller: _serverUrlController,
+            decoration: InputDecoration(
+              labelText: 'Server URL',
+              hintText: 'http://ferna.local',
+              border: OutlineInputBorder(
+                borderRadius: BorderRadius.circular(12),
+              ),
+            ),
+            keyboardType: TextInputType.url,
+          ),
+          actions: [
+            TextButton(
+              onPressed: () => Navigator.of(context).pop(),
+              style: TextButton.styleFrom(
+                foregroundColor: theme.colorScheme.onSurfaceVariant,
+              ),
+              child: const Text('Cancel'),
+            ),
+            ElevatedButton(
+              onPressed: () async {
+                final newUrl = _serverUrlController.text.trim();
+                if (newUrl.isNotEmpty && newUrl != auth.serverUrl) {
+                  // Update in AuthProvider (persists to SharedPreferences, re-inits Dio)
+                  await auth.updateServerUrl(newUrl);
+                }
+                if (mounted) {
+                  Navigator.of(context).pop();
+                }
+              },
+              style: ElevatedButton.styleFrom(
+                backgroundColor: theme.colorScheme.primary,
+                foregroundColor: theme.colorScheme.onPrimary,
+                shape: RoundedRectangleBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+              ),
+              child: const Text('Save'),
+            ),
+          ],
+        );
+      },
+    );
+  }
+
+  /// Called when “Login” or “Sign Up” button is pressed.
+  Future<void> _onSubmit() async {
+    final auth = context.read<AuthProvider>();
+    if (!_formKey.currentState!.validate()) return;
+
+    final email = _emailController.text.trim();
+    final password = _passwordController.text;
+
+    try {
+      if (_isLogin) {
+        await auth.login(email: email, password: password);
+      } else {
+        await auth.signUp(email: email, password: password);
+      }
+
+      // On success, navigate to your home screen:
+      if (!mounted) return;
+      Navigator.of(context).pushReplacementNamed('/home');
+    } catch (error) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text('${_isLogin ? 'Login' : 'Sign Up'} failed: $error'),
+          backgroundColor: Theme.of(context).colorScheme.errorContainer,
+          behavior: SnackBarBehavior.floating,
+        ),
+      );
+    }
+  }
+
+  /// Builds the “Email” TextFormField.
+  Widget _buildEmailField(ColorScheme cs) {
+    return TextFormField(
+      controller: _emailController,
+      keyboardType: TextInputType.emailAddress,
+      decoration: InputDecoration(
+        labelText: 'Email',
+        hintText: 'hello@example.com',
+        prefixIcon: const Icon(Icons.email_outlined),
+        border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
+      ),
+      validator: (value) {
+        if (value == null || value.trim().isEmpty) {
+          return 'Email cannot be empty';
+        }
+        final emailRegex = RegExp(
+          r"^[a-zA-Z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,}$",
+        );
+        if (!emailRegex.hasMatch(value.trim())) {
+          return 'Enter a valid email';
+        }
+        return null;
+      },
+    );
+  }
+
+  /// Builds the “Password” TextFormField.
+  Widget _buildPasswordField(ColorScheme cs) {
+    return TextFormField(
+      controller: _passwordController,
+      obscureText: _obscurePassword,
+      decoration: InputDecoration(
+        labelText: 'Password',
+        prefixIcon: const Icon(Icons.lock_outline),
+        suffixIcon: IconButton(
+          icon: Icon(
+            _obscurePassword ? Icons.visibility_off : Icons.visibility,
+          ),
+          onPressed: () {
+            setState(() => _obscurePassword = !_obscurePassword);
+          },
+        ),
+        border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
+      ),
+      validator: (value) {
+        if (value == null || value.isEmpty) {
+          return 'Password cannot be empty';
+        }
+        if (value.length < 6) {
+          return 'At least 6 characters';
+        }
+        return null;
+      },
+    );
+  }
+
+  /// Builds the “Confirm Password” TextFormField (only in Sign Up mode).
+  Widget _buildConfirmField(ColorScheme cs) {
+    return TextFormField(
+      controller: _confirmPasswordController,
+      obscureText: _obscureConfirm,
+      decoration: InputDecoration(
+        labelText: 'Confirm Password',
+        prefixIcon: const Icon(Icons.lock_outline),
+        suffixIcon: IconButton(
+          icon: Icon(_obscureConfirm ? Icons.visibility_off : Icons.visibility),
+          onPressed: () {
+            setState(() => _obscureConfirm = !_obscureConfirm);
+          },
+        ),
+        border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
+      ),
+      validator: (value) {
+        if (value == null || value.isEmpty) {
+          return 'Confirm your password';
+        }
+        if (value != _passwordController.text) {
+          return 'Passwords do not match';
+        }
+        return null;
+      },
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final auth = context.watch<AuthProvider>();
+    final cs = theme.colorScheme;
+
+    return Scaffold(
+      body: SafeArea(
+        child: Center(
+          child: SingleChildScrollView(
+            padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 16),
+            child: Column(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                // App Icon
+                CircleAvatar(
+                  radius: 32,
+                  backgroundColor: cs.primaryContainer,
+                  child: Icon(
+                    Icons.spa_outlined,
+                    size: 40,
+                    color: cs.onPrimaryContainer,
+                  ),
+                ),
+                const SizedBox(height: 16),
+
+                // Title & Subtitle
+                Text(
+                  'Welcome to Ferna',
+                  style: theme.textTheme.headlineSmall!.copyWith(
+                    fontWeight: FontWeight.w600,
+                  ),
+                ),
+                const SizedBox(height: 4),
+                Text(
+                  'Your personal plant care companion',
+                  style: theme.textTheme.bodyMedium!.copyWith(
+                    color: cs.onSurfaceVariant,
+                  ),
+                ),
+                const SizedBox(height: 32),
+
+                // Toggle: Login / Sign Up
+                Container(
+                  decoration: BoxDecoration(
+                    color: cs.surfaceContainerHighest,
+                    borderRadius: BorderRadius.circular(12),
+                  ),
+                  child: Row(
+                    children: [
+                      Expanded(
+                        child: GestureDetector(
+                          onTap: () {
+                            if (!_isLogin) {
+                              setState(() {
+                                _isLogin = true;
+                              });
+                            }
+                          },
+                          child: AnimatedContainer(
+                            duration: _animationDuration,
+                            padding: const EdgeInsets.symmetric(vertical: 12),
+                            decoration: BoxDecoration(
+                              color: _isLogin
+                                  ? cs.primaryContainer
+                                  : cs.surfaceContainerHighest,
+                              borderRadius: const BorderRadius.only(
+                                topLeft: Radius.circular(12),
+                                bottomLeft: Radius.circular(12),
+                              ),
+                            ),
+                            alignment: Alignment.center,
+                            child: Text(
+                              'Login',
+                              style: theme.textTheme.titleMedium!.copyWith(
+                                color: _isLogin
+                                    ? cs.onPrimaryContainer
+                                    : cs.onSurfaceVariant,
+                                fontWeight: FontWeight.w600,
+                              ),
+                            ),
+                          ),
+                        ),
+                      ),
+
+                      Expanded(
+                        child: GestureDetector(
+                          onTap: () {
+                            if (_isLogin) {
+                              setState(() {
+                                _isLogin = false;
+                              });
+                            }
+                          },
+                          child: AnimatedContainer(
+                            duration: _animationDuration,
+                            padding: const EdgeInsets.symmetric(vertical: 12),
+                            decoration: BoxDecoration(
+                              color: !_isLogin
+                                  ? cs.primaryContainer
+                                  : cs.surfaceContainerHighest,
+                              borderRadius: const BorderRadius.only(
+                                topRight: Radius.circular(12),
+                                bottomRight: Radius.circular(12),
+                              ),
+                            ),
+                            alignment: Alignment.center,
+                            child: Text(
+                              'Sign Up',
+                              style: theme.textTheme.titleMedium!.copyWith(
+                                color: !_isLogin
+                                    ? cs.onPrimaryContainer
+                                    : cs.onSurfaceVariant,
+                                fontWeight: FontWeight.w600,
+                              ),
+                            ),
+                          ),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+                const SizedBox(height: 32),
+
+                Form(
+                  key: _formKey,
+                  child: Column(
+                    children: [
+                      // Email field
+                      _buildEmailField(cs),
+                      const SizedBox(height: 16),
+
+                      // Password field
+                      _buildPasswordField(cs),
+                      const SizedBox(height: 8),
+
+                      // If in Login: show “Forgot password?” link
+                      if (_isLogin) ...[
+                        Align(
+                          alignment: Alignment.centerRight,
+                          child: TextButton(
+                            onPressed: () {
+                              // TODO: push to Forgot Password screen
+                            },
+                            style: TextButton.styleFrom(
+                              padding: EdgeInsets.zero,
+                              minimumSize: const Size(50, 30),
+                              tapTargetSize: MaterialTapTargetSize.shrinkWrap,
+                              foregroundColor: cs.primary,
+                              textStyle: const TextStyle(
+                                fontWeight: FontWeight.w500,
+                              ),
+                            ),
+                            child: const Text('Forgot password?'),
+                          ),
+                        ),
+                        const SizedBox(height: 16),
+                      ] else
+                        // If in Sign Up: leave a bit of vertical spacing before confirm field
+                        const SizedBox(height: 16),
+
+                      // CONFIRM PASSWORD FIELD
+                      AnimatedSize(
+                        duration: _animationDuration,
+                        curve: Curves.easeInOut,
+                        child: _isLogin
+                            ? const SizedBox.shrink()
+                            : Column(
+                                children: [
+                                  _buildConfirmField(cs),
+                                  const SizedBox(height: 24),
+                                ],
+                              ),
+                      ),
+
+                      // SUBMIT BUTTON
+                      SizedBox(
+                        width: double.infinity,
+                        child: ElevatedButton(
+                          onPressed: auth.isLoading ? null : _onSubmit,
+                          style: ElevatedButton.styleFrom(
+                            padding: const EdgeInsets.symmetric(vertical: 14),
+                            shape: RoundedRectangleBorder(
+                              borderRadius: BorderRadius.circular(12),
+                            ),
+                          ),
+                          child: auth.isLoading
+                              ? const SizedBox(
+                                  height: 20,
+                                  width: 20,
+                                  child: CircularProgressIndicator(
+                                    strokeWidth: 2,
+                                    valueColor: AlwaysStoppedAnimation<Color>(
+                                      Colors.white,
+                                    ),
+                                  ),
+                                )
+                              : Text(
+                                  _isLogin ? 'Login' : 'Sign Up',
+                                  style: const TextStyle(
+                                    fontSize: 16,
+                                    fontWeight: FontWeight.w600,
+                                  ),
+                                ),
+                        ),
+                      ),
+                      const SizedBox(height: 24),
+
+                      // CONFIGURE SERVER
+                      TextButton.icon(
+                        onPressed: _showServerConfigDialog,
+                        icon: Icon(
+                          Icons.settings_outlined,
+                          color: cs.onSurfaceVariant,
+                          size: 20,
+                        ),
+                        label: Text(
+                          'Configure Server',
+                          style: theme.textTheme.bodyMedium!.copyWith(
+                            color: cs.onSurfaceVariant,
+                            fontWeight: FontWeight.w500,
+                          ),
+                        ),
+                        style: TextButton.styleFrom(
+                          padding: EdgeInsets.zero,
+                          minimumSize: const Size(50, 30),
+                          tapTargetSize: MaterialTapTargetSize.shrinkWrap,
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+
+                const SizedBox(height: 32),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}
diff --git a/app/lib/services/auth_service.dart b/app/lib/services/auth_service.dart
new file mode 100644
index 0000000..9de5530
--- /dev/null
+++ b/app/lib/services/auth_service.dart
@@ -0,0 +1,51 @@
+import 'package:ferna/services/http_client.dart';
+
+class AuthService {
+  AuthService._();
+
+  static final AuthService instance = AuthService._();
+
+  //Must be called before using any otehr methods of AuthService
+  Future<void> initialize({required String serverUrl}) async {
+    await HttpClient.instance.init(baseUrl: serverUrl);
+  }
+
+  /// Sign up a new user. Returns the user_id on success.
+  Future<int> signup({required String email, required String password}) async {
+    final dio = HttpClient.instance.dio;
+    final response = await dio.post(
+      '/auth/local/signup',
+      data: {'user': email, 'passwd': password},
+    );
+
+    if (response.statusCode == 201) {
+      final data = response.data as Map<String, dynamic>;
+      if (data['success'] == true && data['user_id'] != null) {
+        return data['user_id'] as int;
+      } else {
+        throw Exception('Sign-up failed: ${response.data}');
+      }
+    } else {
+      throw Exception(
+        'Sign-up HTTP ${response.statusCode}: ${response.statusMessage}',
+      );
+    }
+  }
+
+  Future<void> login({required String email, required String password}) async {
+    final dio = HttpClient.instance.dio;
+    final response = await dio.post(
+      '/auth/local/login',
+      data: {'user': email, 'passwd': password},
+    );
+
+    if (response.statusCode == 200) {
+      // CookieManager already saved any Set-Cookie headers to disk.
+      return;
+    } else {
+      throw Exception(
+        'Login HTTP ${response.statusCode}: ${response.statusMessage}',
+      );
+    }
+  }
+}
diff --git a/app/lib/services/http_client.dart b/app/lib/services/http_client.dart
new file mode 100644
index 0000000..08cae73
--- /dev/null
+++ b/app/lib/services/http_client.dart
@@ -0,0 +1,51 @@
+import 'dart:io';
+
+import 'package:dio/dio.dart';
+import 'package:cookie_jar/cookie_jar.dart';
+import 'package:dio_cookie_manager/dio_cookie_manager.dart';
+import 'package:path_provider/path_provider.dart';
+
+class HttpClient {
+  HttpClient._();
+
+  static final HttpClient instance = HttpClient._();
+
+  late Dio dio;
+  late final PersistCookieJar cookieJar;
+  bool _cookieJarInitialized = false;
+
+  Future<void> init({required String baseUrl, String? testCookieDir}) async {
+    if (!_cookieJarInitialized) {
+      //figure out cookie path
+      final cookiesPath =
+          testCookieDir ??
+          (await (() async {
+            final appDocDir = await getApplicationDocumentsDirectory();
+            return '${appDocDir.path}/.cookies/';
+          })());
+
+      //create persistant cookie jar
+      cookieJar = PersistCookieJar(
+        ignoreExpires: false,
+        storage: FileStorage(cookiesPath),
+      );
+      _cookieJarInitialized = true;
+    }
+
+    //create dio with base url
+    dio = Dio(
+      BaseOptions(
+        baseUrl: baseUrl,
+        connectTimeout: const Duration(seconds: 15),
+        receiveTimeout: const Duration(seconds: 15),
+        headers: {HttpHeaders.contentTypeHeader: 'application/json'},
+      ),
+    );
+
+    dio.interceptors.add(CookieManager(cookieJar));
+  }
+
+  Future<void> clearCookies() async {
+    await cookieJar.deleteAll();
+  }
+}
diff --git a/app/lib/services/storage_service.dart b/app/lib/services/storage_service.dart
new file mode 100644
index 0000000..5cee733
--- /dev/null
+++ b/app/lib/services/storage_service.dart
@@ -0,0 +1,20 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+const _kServerUrlKey = 'ferna_server_url';
+
+class StorageService {
+  static Future<SharedPreferences> _prefs() async =>
+      await SharedPreferences.getInstance();
+
+  /// Save the server URL for future app launches.
+  static Future<void> saveServerUrl(String url) async {
+    final prefs = await _prefs();
+    await prefs.setString(_kServerUrlKey, url);
+  }
+
+  /// Read the persisted server URL (or null if none was saved).
+  static Future<String?> getServerUrl() async {
+    final prefs = await _prefs();
+    return prefs.getString(_kServerUrlKey);
+  }
+}
diff --git a/app/lib/theme/theme_data.dart b/app/lib/theme/theme_data.dart
new file mode 100644
index 0000000..2d50345
--- /dev/null
+++ b/app/lib/theme/theme_data.dart
@@ -0,0 +1,207 @@
+import 'package:flutter/material.dart';
+
+class FernaTheme {
+  static const double _borderRadius = 12.0;
+  static const Color _seedColor = Color(0xFF4CAF50);
+
+  /// Light theme
+  static final ThemeData light = _buildTheme(Brightness.light);
+
+  /// Dark theme
+  static final ThemeData dark = _buildTheme(Brightness.dark);
+
+  static ThemeData _buildTheme(Brightness brightness) {
+    final colorScheme = ColorScheme.fromSeed(
+      seedColor: _seedColor,
+      brightness: brightness,
+    );
+
+    final isDark = brightness == Brightness.dark;
+
+    return ThemeData(
+      useMaterial3: true,
+      brightness: brightness,
+      colorScheme: colorScheme,
+
+      // Scaffold / background
+      scaffoldBackgroundColor: colorScheme.surface,
+
+      // AppBar
+      appBarTheme: AppBarTheme(
+        backgroundColor: colorScheme.surface,
+        foregroundColor: colorScheme.onSurface,
+        elevation: 0,
+        centerTitle: true,
+        titleTextStyle: TextStyle(
+          color: colorScheme.onSurface,
+          fontWeight: FontWeight.w600,
+          fontSize: 20,
+        ),
+      ),
+
+      // Text themes
+      textTheme: isDark
+          ? Typography.material2021().white
+          : Typography.material2021().black,
+
+      // ElevatedButton
+      elevatedButtonTheme: ElevatedButtonThemeData(
+        style: ElevatedButton.styleFrom(
+          backgroundColor: colorScheme.primary,
+          foregroundColor: colorScheme.onPrimary,
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(_borderRadius),
+          ),
+          textStyle: const TextStyle(fontWeight: FontWeight.w600),
+        ),
+      ),
+
+      // OutlinedButton
+      outlinedButtonTheme: OutlinedButtonThemeData(
+        style: OutlinedButton.styleFrom(
+          foregroundColor: colorScheme.primary,
+          side: BorderSide(color: colorScheme.primary),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(_borderRadius),
+          ),
+          textStyle: const TextStyle(fontWeight: FontWeight.w600),
+        ),
+      ),
+
+      // TextButton
+      textButtonTheme: TextButtonThemeData(
+        style: TextButton.styleFrom(
+          foregroundColor: colorScheme.primary,
+          textStyle: const TextStyle(fontWeight: FontWeight.w600),
+        ),
+      ), // Input fields
+      inputDecorationTheme: InputDecorationTheme(
+        contentPadding: const EdgeInsets.symmetric(
+          horizontal: 16,
+          vertical: 14,
+        ),
+        filled: true,
+        fillColor: colorScheme.surfaceContainerHighest,
+        hintStyle: TextStyle(color: colorScheme.onSurfaceVariant),
+        labelStyle: TextStyle(color: colorScheme.primary),
+        border: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(_borderRadius),
+          borderSide: BorderSide(color: colorScheme.outline),
+        ),
+        enabledBorder: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(_borderRadius),
+          borderSide: BorderSide(color: colorScheme.outline),
+        ),
+        focusedBorder: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(_borderRadius),
+          borderSide: BorderSide(color: colorScheme.primary, width: 2),
+        ),
+      ),
+
+      // SnackBar
+      snackBarTheme: SnackBarThemeData(
+        backgroundColor: colorScheme.secondaryContainer,
+        contentTextStyle: TextStyle(
+          color: colorScheme.onSecondaryContainer,
+          fontWeight: FontWeight.w600,
+        ),
+        behavior: SnackBarBehavior.floating,
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(_borderRadius),
+        ),
+      ),
+      // Dialogs
+      dialogTheme: DialogThemeData(
+        backgroundColor: colorScheme.surface,
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(_borderRadius),
+        ),
+        titleTextStyle: TextStyle(
+          color: colorScheme.onSurface,
+          fontSize: 18,
+          fontWeight: FontWeight.w600,
+        ),
+        contentTextStyle: TextStyle(
+          color: colorScheme.onSurfaceVariant,
+          fontSize: 14,
+        ),
+      ),
+
+      // BottomNavigationBar (fixed, Material 3 style)
+      bottomNavigationBarTheme: BottomNavigationBarThemeData(
+        backgroundColor: colorScheme.surface,
+        selectedItemColor: colorScheme.primary,
+        unselectedItemColor: colorScheme.onSurfaceVariant,
+        showUnselectedLabels: true,
+        elevation: 8,
+      ),
+
+      // FloatingActionButton
+      floatingActionButtonTheme: FloatingActionButtonThemeData(
+        backgroundColor: colorScheme.primary,
+        foregroundColor: colorScheme.onPrimary,
+      ),
+
+      // Divider
+      dividerTheme: DividerThemeData(
+        color: colorScheme.outlineVariant,
+        thickness: 1,
+        space: 1,
+      ),
+
+      // Card
+      cardTheme: CardThemeData(
+        color: colorScheme.surfaceContainerHighest,
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(_borderRadius),
+        ),
+        elevation: isDark ? 2 : 4,
+      ),
+
+      // Chip
+      chipTheme: ChipThemeData(
+        backgroundColor: colorScheme.primaryContainer,
+        disabledColor: colorScheme.onSurfaceVariant.withValues(alpha: 0.12),
+        selectedColor: colorScheme.primary,
+        labelStyle: TextStyle(
+          color: colorScheme.onPrimaryContainer,
+          fontWeight: FontWeight.w500,
+        ),
+        secondaryLabelStyle: TextStyle(
+          color: colorScheme.onPrimary,
+          fontWeight: FontWeight.w500,
+        ),
+        padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(_borderRadius),
+        ),
+        secondarySelectedColor: colorScheme.primaryContainer,
+        brightness: brightness,
+      ), // Slider
+      sliderTheme: SliderThemeData(
+        activeTrackColor: colorScheme.primary,
+        inactiveTrackColor: colorScheme.primary.withValues(alpha: 0.3),
+        thumbColor: colorScheme.primary,
+        valueIndicatorColor: colorScheme.primaryContainer,
+      ),
+
+      // Switch
+      switchTheme: SwitchThemeData(
+        thumbColor: WidgetStateProperty.resolveWith(
+          (states) => colorScheme.primary,
+        ),
+        trackColor: WidgetStateProperty.resolveWith(
+          (states) => colorScheme.primary.withValues(alpha: 0.5),
+        ),
+      ),
+
+      // ProgressIndicator
+      progressIndicatorTheme: ProgressIndicatorThemeData(
+        color: colorScheme.primary,
+      ),
+
+      // IconButton
+      iconTheme: IconThemeData(color: colorScheme.onSurface),
+    );
+  }
+}
diff --git a/app/pubspec.lock b/app/pubspec.lock
index 3af1452..86dbc01 100644
--- a/app/pubspec.lock
+++ b/app/pubspec.lock
@@ -1,6 +1,30 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      sha256: e55636ed79578b9abca5fecf9437947798f5ef7456308b5cb85720b793eac92f
+      url: "https://pub.dev"
+    source: hosted
+    version: "82.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      sha256: "904ae5bb474d32c38fb9482e2d925d5454cda04ddd0e55d2e6826bc72f6ba8c0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.4.5"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      sha256: d0481093c50b1da8910eb0bb301626d4d8eb7284aa739614d2b394ee09e3ea04
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.7.0"
   async:
     dependency: transitive
     description:
@@ -17,6 +41,70 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.2"
+  build:
+    dependency: transitive
+    description:
+      name: build
+      sha256: cef23f1eda9b57566c81e2133d196f8e3df48f244b317368d65c5943d91148f0
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
+  build_config:
+    dependency: transitive
+    description:
+      name: build_config
+      sha256: "4ae2de3e1e67ea270081eaee972e1bd8f027d459f249e0f1186730784c2e7e33"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
+  build_daemon:
+    dependency: transitive
+    description:
+      name: build_daemon
+      sha256: "8e928697a82be082206edb0b9c99c5a4ad6bc31c9e9b8b2f291ae65cd4a25daa"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.4"
+  build_resolvers:
+    dependency: transitive
+    description:
+      name: build_resolvers
+      sha256: b9e4fda21d846e192628e7a4f6deda6888c36b5b69ba02ff291a01fd529140f0
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.4"
+  build_runner:
+    dependency: "direct dev"
+    description:
+      name: build_runner
+      sha256: "058fe9dce1de7d69c4b84fada934df3e0153dd000758c4d65964d0166779aa99"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.15"
+  build_runner_core:
+    dependency: transitive
+    description:
+      name: build_runner_core
+      sha256: "22e3aa1c80e0ada3722fe5b63fd43d9c8990759d0a2cf489c8c5d7b2bdebc021"
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.0.0"
+  built_collection:
+    dependency: transitive
+    description:
+      name: built_collection
+      sha256: "376e3dd27b51ea877c28d525560790aee2e6fbb5f20e2f85d5081027d94e2100"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.1.1"
+  built_value:
+    dependency: transitive
+    description:
+      name: built_value
+      sha256: "082001b5c3dc495d4a42f1d5789990505df20d8547d42507c29050af6933ee27"
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.10.1"
   characters:
     dependency: transitive
     description:
@@ -25,6 +113,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  checked_yaml:
+    dependency: transitive
+    description:
+      name: checked_yaml
+      sha256: "959525d3162f249993882720d52b7e0c833978df229be20702b33d48d91de70f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.4"
+  cli_config:
+    dependency: transitive
+    description:
+      name: cli_config
+      sha256: ac20a183a07002b700f0c25e61b7ee46b23c309d76ab7b7640a028f18e4d99ec
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
   clock:
     dependency: transitive
     description:
@@ -33,6 +137,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.2"
+  code_builder:
+    dependency: transitive
+    description:
+      name: code_builder
+      sha256: "0ec10bf4a89e4c613960bf1e8b42c64127021740fb21640c29c909826a5eea3e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.10.1"
   collection:
     dependency: transitive
     description:
@@ -41,6 +153,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.19.1"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: b30acd5944035672bc15c6b7a8b47d773e41e2f17de064350988c5d02adb1c68
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.2"
+  cookie_jar:
+    dependency: "direct main"
+    description:
+      name: cookie_jar
+      sha256: a6ac027d3ed6ed756bfce8f3ff60cb479e266f3b0fdabd6242b804b6765e52de
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.8"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      sha256: aa07dbe5f2294c827b7edb9a87bba44a9c15a3cc81bc8da2ca19b37322d30080
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.14.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: "1e445881f28f22d6140f181e07737b22f1e099a5e1ff94b0af2f9e4a463f4855"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.6"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -49,6 +193,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.8"
+  dart_style:
+    dependency: transitive
+    description:
+      name: dart_style
+      sha256: "5b236382b47ee411741447c1f1e111459c941ea1b3f2b540dde54c210a3662af"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.0"
+  dio:
+    dependency: "direct main"
+    description:
+      name: dio
+      sha256: "253a18bbd4851fecba42f7343a1df3a9a4c1d31a2c1b37e221086b4fa8c8dbc9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.8.0+1"
+  dio_cookie_manager:
+    dependency: "direct main"
+    description:
+      name: dio_cookie_manager
+      sha256: "47cacbf6a783c263bfa7cd7d08101e93127d87760ddb003ba289162f7be0f679"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.0"
+  dio_web_adapter:
+    dependency: transitive
+    description:
+      name: dio_web_adapter
+      sha256: "7586e476d70caecaf1686d21eee7247ea43ef5c345eab9e0cc3583ff13378d78"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
   fake_async:
     dependency: transitive
     description:
@@ -57,6 +233,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.3"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "289279317b4b16eb2bb7e271abccd4bf84ec9bdcbe999e278a94b804f5630418"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.1"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      sha256: b6dc7065e46c974bc7c5f143080a6764ec7a4be6da1285ececdc37be96de53be
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -75,6 +275,83 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      sha256: f64a0333a82f30b0cca061bc3d143813a486dc086b574bfb233b7c1372427694
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: c3f1ee72c96f8f78935e18aa8cecced9ab132419e8625dc187e1c2408efc20de
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
+  graphs:
+    dependency: transitive
+    description:
+      name: graphs
+      sha256: "741bbf84165310a68ff28fe9e727332eef1407342fca52759cb21ad8177bb8d0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.2"
+  http:
+    dependency: transitive
+    description:
+      name: http
+      sha256: "2c11f3f94c687ee9bad77c171151672986360b2b001d109814ee7140b2cf261b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      sha256: aa6199f908078bb1c5efb8d8638d4ae191aac11b311132c3ef48ce352fb52ef8
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.2"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "178d74305e7866013777bab2c3d8726205dc5a4dd935297175b19a23a2e66571"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.1.2"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      sha256: dfd5a80599cf0165756e3181807ed3e77daf6dd4137caaad72d0b7931597650b
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.5"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: "53385261521cc4a0c4658fd0ad07a7d14591cf8fc33abbceae306ddb974888dc"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.2"
+  json_annotation:
+    dependency: transitive
+    description:
+      name: json_annotation
+      sha256: "1ce844379ca14835a50d2f019a3099f419082cfdd231cd86a142af94dd5c6bb1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.9.0"
   leak_tracker:
     dependency: transitive
     description:
@@ -107,6 +384,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.1.1"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.0"
   matcher:
     dependency: transitive
     description:
@@ -131,6 +416,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.16.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: "41a20518f0cb1256669420fdba0cd90d21561e560ac240f26ef8322e45bb7ed6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
+  mockito:
+    dependency: "direct dev"
+    description:
+      name: mockito
+      sha256: "4546eac99e8967ea91bae633d2ca7698181d008e95fa4627330cf903d573277a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.4.6"
+  nested:
+    dependency: transitive
+    description:
+      name: nested
+      sha256: "03bac4c528c64c95c722ec99280375a6f2fc708eec17c7b3f07253b626cd2a20"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      sha256: "6e7eac89047ab8a8d26cf16127b5ed26de65209847630400f9aefd7cd5c730db"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: f096c55ebb7deb7e384101542bfba8c52696c1b56fca2eb62827989ef2353bbc
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
   path:
     dependency: transitive
     description:
@@ -139,11 +464,219 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
+  path_provider:
+    dependency: "direct main"
+    description:
+      name: path_provider
+      sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.5"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      sha256: d0d310befe2c8ab9e7f393288ccbb11b60c019c6b5afc21973eeee4dda2b35e9
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.17"
+  path_provider_foundation:
+    dependency: transitive
+    description:
+      name: path_provider_foundation
+      sha256: "4843174df4d288f5e29185bd6e72a6fbdf5a4a4602717eed565497429f179942"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: f7a1fe3a634fe7734c8d3f2766ad746ae2a2884abe22e241a8b301bf5cac3279
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: "88f5779f72ba699763fa3a3b06aa4bf6de76c8e5de842cf6f29e2e06476c2334"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.0"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "5d6b1b0036a5f331ebc77c850ebc8506cbc1e9416c27e59b439f917a902a4984"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.6"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      sha256: "4820fbfdb9478b1ebae27888254d445073732dae3d6ea81f0b7e06d5dedc3f02"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.8"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      sha256: "20fe868b6314b322ea036ba325e6fc0711a22948856475e2c2b6306e8ab39c2a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.1"
+  provider:
+    dependency: "direct main"
+    description:
+      name: provider
+      sha256: "4abbd070a04e9ddc287673bf5a030c7ca8b685ff70218720abab8b092f53dd84"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.1.5"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "5bfcf68ca79ef689f8990d1160781b4bad40a3bd5e5218ad4076ddb7f4081585"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  pubspec_parse:
+    dependency: transitive
+    description:
+      name: pubspec_parse
+      sha256: "0560ba233314abbed0a48a2956f7f022cce7c3e1e73df540277da7544cad4082"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.0"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      sha256: "6e8bf70b7fef813df4e9a36f658ac46d107db4b4cfe1048b477d4e453a8159f5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.3"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      sha256: "20cbd561f743a342c76c151d6ddb93a9ce6005751e7aa458baad3858bfbfb6ac"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.10"
+  shared_preferences_foundation:
+    dependency: transitive
+    description:
+      name: shared_preferences_foundation
+      sha256: "6a52cfcdaeac77cad8c97b539ff688ccfc458c007b4db12be584fbe5c0e49e03"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.4"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      sha256: "57cbf196c486bc2cf1f02b85784932c6094376284b3ad5779d1b1c6c6a816b80"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      sha256: c49bd060261c9a3f0ff445892695d6212ff603ef3115edbb448509d407600019
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.3"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      sha256: e7dd780a7ffb623c57850b33f43309312fc863fb6aa3d276a754bb299839ef12
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.2"
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      sha256: "89f967eca29607c933ba9571d838be31d67f53f6e4ee15147d5dc2934fee1b1e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      sha256: c87c3875f91262785dade62d135760c2c69cb217ac759485334c5857ad89f6e3
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.3"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      sha256: "3632775c8e90d6c9712f883e633716432a27758216dfb61bd86a8321c0580925"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
   sky_engine:
     dependency: transitive
     description: flutter
     source: sdk
     version: "0.0.0"
+  source_gen:
+    dependency: transitive
+    description:
+      name: source_gen
+      sha256: "35c8150ece9e8c8d263337a265153c3329667640850b9304861faea59fc98f6b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      sha256: c0713a43e323c3302c2abe2a1cc89aa057a387101ebd280371d6a6c9fa68516b
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      sha256: "190222579a448b03896e0ca6eca5998fa810fda630c1d65e2f78b3f638f54812"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.13"
   source_span:
     dependency: transitive
     description:
@@ -168,6 +701,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.4"
+  stream_transform:
+    dependency: transitive
+    description:
+      name: stream_transform
+      sha256: ad47125e588cfd37a9a7f86c7d6356dde8dfe89d071d293f80ca9e9273a33871
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
   string_scanner:
     dependency: transitive
     description:
@@ -184,6 +725,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.2.2"
+  test:
+    dependency: "direct dev"
+    description:
+      name: test
+      sha256: "301b213cd241ca982e9ba50266bd3f5bd1ea33f1455554c5abb85d1be0e2d87e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.25.15"
   test_api:
     dependency: transitive
     description:
@@ -192,6 +741,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.4"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      sha256: "84d17c3486c8dfdbe5e12a50c8ae176d15e2a771b96909a9442b40173649ccaa"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.8"
+  timing:
+    dependency: transitive
+    description:
+      name: timing
+      sha256: "62ee18aca144e4a9f29d212f5a4c6a053be252b895ab14b5821996cff4ed90fe"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.2"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
+  universal_io:
+    dependency: transitive
+    description:
+      name: universal_io
+      sha256: "1722b2dcc462b4b2f3ee7d188dad008b6eb4c40bbd03a3de451d82c78bba9aad"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.2"
   vector_math:
     dependency: transitive
     description:
@@ -208,6 +789,62 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "15.0.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      sha256: "69da27e49efa56a15f8afe8f4438c4ec02eff0a117df1b22ea4aad194fe1c104"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  web_socket:
+    dependency: transitive
+    description:
+      name: web_socket
+      sha256: "34d64019aa8e36bf9842ac014bb5d2f5586ca73df5e4d9bf5c936975cae6982c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.1"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      sha256: d645757fb0f4773d602444000a8131ff5d48c9e47adfe9772652dd1a4f2d45c8
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      sha256: "87d3f2333bb240704cd3f1c6b5b7acd8a10e7f0bc28c28dcf14e782014f4a572"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      sha256: "7a3f37b05d989967cdddcbb571f1ea834867ae2faa29725fd085180e0883aa15"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: b9da305ac7c39faa3f030eccd175340f968459dae4af175130b3fc47e40d76ce
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.3"
 sdks:
   dart: ">=3.8.0 <4.0.0"
-  flutter: ">=3.18.0-18.0.pre.54"
+  flutter: ">=3.27.0"
diff --git a/app/pubspec.yaml b/app/pubspec.yaml
index a2215e9..f109b14 100644
--- a/app/pubspec.yaml
+++ b/app/pubspec.yaml
@@ -34,6 +34,12 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.8
+  provider: ^6.1.5
+  dio: ^5.8.0+1
+  cookie_jar: ^4.0.8
+  dio_cookie_manager: ^3.2.0
+  path_provider: ^2.1.5
+  shared_preferences: ^2.5.3
 
 dev_dependencies:
   flutter_test:
@@ -45,6 +51,9 @@ dev_dependencies:
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
   flutter_lints: ^5.0.0
+  mockito: ^5.4.6
+  test: any
+  build_runner: any
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
diff --git a/app/test/mocks.dart b/app/test/mocks.dart
new file mode 100644
index 0000000..50e9d18
--- /dev/null
+++ b/app/test/mocks.dart
@@ -0,0 +1,6 @@
+import 'package:dio/dio.dart';
+import 'package:mockito/annotations.dart';
+
+// Tell Mockito to generate a MockDio class for us.
+@GenerateMocks([Dio])
+void main() {}
diff --git a/app/test/mocks.mocks.dart b/app/test/mocks.mocks.dart
new file mode 100644
index 0000000..5208d07
--- /dev/null
+++ b/app/test/mocks.mocks.dart
@@ -0,0 +1,806 @@
+// Mocks generated by Mockito 5.4.6 from annotations
+// in ferna/test/mocks.dart.
+// Do not manually edit this file.
+
+// ignore_for_file: no_leading_underscores_for_library_prefixes
+import 'dart:async' as _i8;
+
+import 'package:dio/src/adapter.dart' as _i3;
+import 'package:dio/src/cancel_token.dart' as _i9;
+import 'package:dio/src/dio.dart' as _i7;
+import 'package:dio/src/dio_mixin.dart' as _i5;
+import 'package:dio/src/options.dart' as _i2;
+import 'package:dio/src/response.dart' as _i6;
+import 'package:dio/src/transformer.dart' as _i4;
+import 'package:mockito/mockito.dart' as _i1;
+
+// ignore_for_file: type=lint
+// ignore_for_file: avoid_redundant_argument_values
+// ignore_for_file: avoid_setters_without_getters
+// ignore_for_file: comment_references
+// ignore_for_file: deprecated_member_use
+// ignore_for_file: deprecated_member_use_from_same_package
+// ignore_for_file: implementation_imports
+// ignore_for_file: invalid_use_of_visible_for_testing_member
+// ignore_for_file: must_be_immutable
+// ignore_for_file: prefer_const_constructors
+// ignore_for_file: unnecessary_parenthesis
+// ignore_for_file: camel_case_types
+// ignore_for_file: subtype_of_sealed_class
+
+class _FakeBaseOptions_0 extends _i1.SmartFake implements _i2.BaseOptions {
+  _FakeBaseOptions_0(Object parent, Invocation parentInvocation)
+    : super(parent, parentInvocation);
+}
+
+class _FakeHttpClientAdapter_1 extends _i1.SmartFake
+    implements _i3.HttpClientAdapter {
+  _FakeHttpClientAdapter_1(Object parent, Invocation parentInvocation)
+    : super(parent, parentInvocation);
+}
+
+class _FakeTransformer_2 extends _i1.SmartFake implements _i4.Transformer {
+  _FakeTransformer_2(Object parent, Invocation parentInvocation)
+    : super(parent, parentInvocation);
+}
+
+class _FakeInterceptors_3 extends _i1.SmartFake implements _i5.Interceptors {
+  _FakeInterceptors_3(Object parent, Invocation parentInvocation)
+    : super(parent, parentInvocation);
+}
+
+class _FakeResponse_4<T1> extends _i1.SmartFake implements _i6.Response<T1> {
+  _FakeResponse_4(Object parent, Invocation parentInvocation)
+    : super(parent, parentInvocation);
+}
+
+class _FakeDio_5 extends _i1.SmartFake implements _i7.Dio {
+  _FakeDio_5(Object parent, Invocation parentInvocation)
+    : super(parent, parentInvocation);
+}
+
+/// A class which mocks [Dio].
+///
+/// See the documentation for Mockito's code generation for more information.
+class MockDio extends _i1.Mock implements _i7.Dio {
+  MockDio() {
+    _i1.throwOnMissingStub(this);
+  }
+
+  @override
+  _i2.BaseOptions get options =>
+      (super.noSuchMethod(
+            Invocation.getter(#options),
+            returnValue: _FakeBaseOptions_0(this, Invocation.getter(#options)),
+          )
+          as _i2.BaseOptions);
+
+  @override
+  _i3.HttpClientAdapter get httpClientAdapter =>
+      (super.noSuchMethod(
+            Invocation.getter(#httpClientAdapter),
+            returnValue: _FakeHttpClientAdapter_1(
+              this,
+              Invocation.getter(#httpClientAdapter),
+            ),
+          )
+          as _i3.HttpClientAdapter);
+
+  @override
+  _i4.Transformer get transformer =>
+      (super.noSuchMethod(
+            Invocation.getter(#transformer),
+            returnValue: _FakeTransformer_2(
+              this,
+              Invocation.getter(#transformer),
+            ),
+          )
+          as _i4.Transformer);
+
+  @override
+  _i5.Interceptors get interceptors =>
+      (super.noSuchMethod(
+            Invocation.getter(#interceptors),
+            returnValue: _FakeInterceptors_3(
+              this,
+              Invocation.getter(#interceptors),
+            ),
+          )
+          as _i5.Interceptors);
+
+  @override
+  set options(_i2.BaseOptions? _options) => super.noSuchMethod(
+    Invocation.setter(#options, _options),
+    returnValueForMissingStub: null,
+  );
+
+  @override
+  set httpClientAdapter(_i3.HttpClientAdapter? _httpClientAdapter) =>
+      super.noSuchMethod(
+        Invocation.setter(#httpClientAdapter, _httpClientAdapter),
+        returnValueForMissingStub: null,
+      );
+
+  @override
+  set transformer(_i4.Transformer? _transformer) => super.noSuchMethod(
+    Invocation.setter(#transformer, _transformer),
+    returnValueForMissingStub: null,
+  );
+
+  @override
+  void close({bool? force = false}) => super.noSuchMethod(
+    Invocation.method(#close, [], {#force: force}),
+    returnValueForMissingStub: null,
+  );
+
+  @override
+  _i8.Future<_i6.Response<T>> head<T>(
+    String? path, {
+    Object? data,
+    Map<String, dynamic>? queryParameters,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #head,
+              [path],
+              {
+                #data: data,
+                #queryParameters: queryParameters,
+                #options: options,
+                #cancelToken: cancelToken,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #head,
+                  [path],
+                  {
+                    #data: data,
+                    #queryParameters: queryParameters,
+                    #options: options,
+                    #cancelToken: cancelToken,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> headUri<T>(
+    Uri? uri, {
+    Object? data,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #headUri,
+              [uri],
+              {#data: data, #options: options, #cancelToken: cancelToken},
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #headUri,
+                  [uri],
+                  {#data: data, #options: options, #cancelToken: cancelToken},
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> get<T>(
+    String? path, {
+    Object? data,
+    Map<String, dynamic>? queryParameters,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+    _i2.ProgressCallback? onReceiveProgress,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #get,
+              [path],
+              {
+                #data: data,
+                #queryParameters: queryParameters,
+                #options: options,
+                #cancelToken: cancelToken,
+                #onReceiveProgress: onReceiveProgress,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #get,
+                  [path],
+                  {
+                    #data: data,
+                    #queryParameters: queryParameters,
+                    #options: options,
+                    #cancelToken: cancelToken,
+                    #onReceiveProgress: onReceiveProgress,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> getUri<T>(
+    Uri? uri, {
+    Object? data,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+    _i2.ProgressCallback? onReceiveProgress,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #getUri,
+              [uri],
+              {
+                #data: data,
+                #options: options,
+                #cancelToken: cancelToken,
+                #onReceiveProgress: onReceiveProgress,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #getUri,
+                  [uri],
+                  {
+                    #data: data,
+                    #options: options,
+                    #cancelToken: cancelToken,
+                    #onReceiveProgress: onReceiveProgress,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> post<T>(
+    String? path, {
+    Object? data,
+    Map<String, dynamic>? queryParameters,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+    _i2.ProgressCallback? onSendProgress,
+    _i2.ProgressCallback? onReceiveProgress,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #post,
+              [path],
+              {
+                #data: data,
+                #queryParameters: queryParameters,
+                #options: options,
+                #cancelToken: cancelToken,
+                #onSendProgress: onSendProgress,
+                #onReceiveProgress: onReceiveProgress,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #post,
+                  [path],
+                  {
+                    #data: data,
+                    #queryParameters: queryParameters,
+                    #options: options,
+                    #cancelToken: cancelToken,
+                    #onSendProgress: onSendProgress,
+                    #onReceiveProgress: onReceiveProgress,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> postUri<T>(
+    Uri? uri, {
+    Object? data,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+    _i2.ProgressCallback? onSendProgress,
+    _i2.ProgressCallback? onReceiveProgress,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #postUri,
+              [uri],
+              {
+                #data: data,
+                #options: options,
+                #cancelToken: cancelToken,
+                #onSendProgress: onSendProgress,
+                #onReceiveProgress: onReceiveProgress,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #postUri,
+                  [uri],
+                  {
+                    #data: data,
+                    #options: options,
+                    #cancelToken: cancelToken,
+                    #onSendProgress: onSendProgress,
+                    #onReceiveProgress: onReceiveProgress,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> put<T>(
+    String? path, {
+    Object? data,
+    Map<String, dynamic>? queryParameters,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+    _i2.ProgressCallback? onSendProgress,
+    _i2.ProgressCallback? onReceiveProgress,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #put,
+              [path],
+              {
+                #data: data,
+                #queryParameters: queryParameters,
+                #options: options,
+                #cancelToken: cancelToken,
+                #onSendProgress: onSendProgress,
+                #onReceiveProgress: onReceiveProgress,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #put,
+                  [path],
+                  {
+                    #data: data,
+                    #queryParameters: queryParameters,
+                    #options: options,
+                    #cancelToken: cancelToken,
+                    #onSendProgress: onSendProgress,
+                    #onReceiveProgress: onReceiveProgress,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> putUri<T>(
+    Uri? uri, {
+    Object? data,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+    _i2.ProgressCallback? onSendProgress,
+    _i2.ProgressCallback? onReceiveProgress,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #putUri,
+              [uri],
+              {
+                #data: data,
+                #options: options,
+                #cancelToken: cancelToken,
+                #onSendProgress: onSendProgress,
+                #onReceiveProgress: onReceiveProgress,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #putUri,
+                  [uri],
+                  {
+                    #data: data,
+                    #options: options,
+                    #cancelToken: cancelToken,
+                    #onSendProgress: onSendProgress,
+                    #onReceiveProgress: onReceiveProgress,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> patch<T>(
+    String? path, {
+    Object? data,
+    Map<String, dynamic>? queryParameters,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+    _i2.ProgressCallback? onSendProgress,
+    _i2.ProgressCallback? onReceiveProgress,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #patch,
+              [path],
+              {
+                #data: data,
+                #queryParameters: queryParameters,
+                #options: options,
+                #cancelToken: cancelToken,
+                #onSendProgress: onSendProgress,
+                #onReceiveProgress: onReceiveProgress,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #patch,
+                  [path],
+                  {
+                    #data: data,
+                    #queryParameters: queryParameters,
+                    #options: options,
+                    #cancelToken: cancelToken,
+                    #onSendProgress: onSendProgress,
+                    #onReceiveProgress: onReceiveProgress,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> patchUri<T>(
+    Uri? uri, {
+    Object? data,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+    _i2.ProgressCallback? onSendProgress,
+    _i2.ProgressCallback? onReceiveProgress,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #patchUri,
+              [uri],
+              {
+                #data: data,
+                #options: options,
+                #cancelToken: cancelToken,
+                #onSendProgress: onSendProgress,
+                #onReceiveProgress: onReceiveProgress,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #patchUri,
+                  [uri],
+                  {
+                    #data: data,
+                    #options: options,
+                    #cancelToken: cancelToken,
+                    #onSendProgress: onSendProgress,
+                    #onReceiveProgress: onReceiveProgress,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> delete<T>(
+    String? path, {
+    Object? data,
+    Map<String, dynamic>? queryParameters,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #delete,
+              [path],
+              {
+                #data: data,
+                #queryParameters: queryParameters,
+                #options: options,
+                #cancelToken: cancelToken,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #delete,
+                  [path],
+                  {
+                    #data: data,
+                    #queryParameters: queryParameters,
+                    #options: options,
+                    #cancelToken: cancelToken,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> deleteUri<T>(
+    Uri? uri, {
+    Object? data,
+    _i2.Options? options,
+    _i9.CancelToken? cancelToken,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #deleteUri,
+              [uri],
+              {#data: data, #options: options, #cancelToken: cancelToken},
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #deleteUri,
+                  [uri],
+                  {#data: data, #options: options, #cancelToken: cancelToken},
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<dynamic>> download(
+    String? urlPath,
+    dynamic savePath, {
+    _i2.ProgressCallback? onReceiveProgress,
+    Map<String, dynamic>? queryParameters,
+    _i9.CancelToken? cancelToken,
+    bool? deleteOnError = true,
+    _i2.FileAccessMode? fileAccessMode = _i2.FileAccessMode.write,
+    String? lengthHeader = 'content-length',
+    Object? data,
+    _i2.Options? options,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #download,
+              [urlPath, savePath],
+              {
+                #onReceiveProgress: onReceiveProgress,
+                #queryParameters: queryParameters,
+                #cancelToken: cancelToken,
+                #deleteOnError: deleteOnError,
+                #fileAccessMode: fileAccessMode,
+                #lengthHeader: lengthHeader,
+                #data: data,
+                #options: options,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<dynamic>>.value(
+              _FakeResponse_4<dynamic>(
+                this,
+                Invocation.method(
+                  #download,
+                  [urlPath, savePath],
+                  {
+                    #onReceiveProgress: onReceiveProgress,
+                    #queryParameters: queryParameters,
+                    #cancelToken: cancelToken,
+                    #deleteOnError: deleteOnError,
+                    #fileAccessMode: fileAccessMode,
+                    #lengthHeader: lengthHeader,
+                    #data: data,
+                    #options: options,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<dynamic>>);
+
+  @override
+  _i8.Future<_i6.Response<dynamic>> downloadUri(
+    Uri? uri,
+    dynamic savePath, {
+    _i2.ProgressCallback? onReceiveProgress,
+    _i9.CancelToken? cancelToken,
+    bool? deleteOnError = true,
+    _i2.FileAccessMode? fileAccessMode = _i2.FileAccessMode.write,
+    String? lengthHeader = 'content-length',
+    Object? data,
+    _i2.Options? options,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #downloadUri,
+              [uri, savePath],
+              {
+                #onReceiveProgress: onReceiveProgress,
+                #cancelToken: cancelToken,
+                #deleteOnError: deleteOnError,
+                #fileAccessMode: fileAccessMode,
+                #lengthHeader: lengthHeader,
+                #data: data,
+                #options: options,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<dynamic>>.value(
+              _FakeResponse_4<dynamic>(
+                this,
+                Invocation.method(
+                  #downloadUri,
+                  [uri, savePath],
+                  {
+                    #onReceiveProgress: onReceiveProgress,
+                    #cancelToken: cancelToken,
+                    #deleteOnError: deleteOnError,
+                    #fileAccessMode: fileAccessMode,
+                    #lengthHeader: lengthHeader,
+                    #data: data,
+                    #options: options,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<dynamic>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> request<T>(
+    String? url, {
+    Object? data,
+    Map<String, dynamic>? queryParameters,
+    _i9.CancelToken? cancelToken,
+    _i2.Options? options,
+    _i2.ProgressCallback? onSendProgress,
+    _i2.ProgressCallback? onReceiveProgress,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #request,
+              [url],
+              {
+                #data: data,
+                #queryParameters: queryParameters,
+                #cancelToken: cancelToken,
+                #options: options,
+                #onSendProgress: onSendProgress,
+                #onReceiveProgress: onReceiveProgress,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #request,
+                  [url],
+                  {
+                    #data: data,
+                    #queryParameters: queryParameters,
+                    #cancelToken: cancelToken,
+                    #options: options,
+                    #onSendProgress: onSendProgress,
+                    #onReceiveProgress: onReceiveProgress,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> requestUri<T>(
+    Uri? uri, {
+    Object? data,
+    _i9.CancelToken? cancelToken,
+    _i2.Options? options,
+    _i2.ProgressCallback? onSendProgress,
+    _i2.ProgressCallback? onReceiveProgress,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(
+              #requestUri,
+              [uri],
+              {
+                #data: data,
+                #cancelToken: cancelToken,
+                #options: options,
+                #onSendProgress: onSendProgress,
+                #onReceiveProgress: onReceiveProgress,
+              },
+            ),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(
+                  #requestUri,
+                  [uri],
+                  {
+                    #data: data,
+                    #cancelToken: cancelToken,
+                    #options: options,
+                    #onSendProgress: onSendProgress,
+                    #onReceiveProgress: onReceiveProgress,
+                  },
+                ),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i8.Future<_i6.Response<T>> fetch<T>(_i2.RequestOptions? requestOptions) =>
+      (super.noSuchMethod(
+            Invocation.method(#fetch, [requestOptions]),
+            returnValue: _i8.Future<_i6.Response<T>>.value(
+              _FakeResponse_4<T>(
+                this,
+                Invocation.method(#fetch, [requestOptions]),
+              ),
+            ),
+          )
+          as _i8.Future<_i6.Response<T>>);
+
+  @override
+  _i7.Dio clone({
+    _i2.BaseOptions? options,
+    _i5.Interceptors? interceptors,
+    _i3.HttpClientAdapter? httpClientAdapter,
+    _i4.Transformer? transformer,
+  }) =>
+      (super.noSuchMethod(
+            Invocation.method(#clone, [], {
+              #options: options,
+              #interceptors: interceptors,
+              #httpClientAdapter: httpClientAdapter,
+              #transformer: transformer,
+            }),
+            returnValue: _FakeDio_5(
+              this,
+              Invocation.method(#clone, [], {
+                #options: options,
+                #interceptors: interceptors,
+                #httpClientAdapter: httpClientAdapter,
+                #transformer: transformer,
+              }),
+            ),
+          )
+          as _i7.Dio);
+}
diff --git a/app/test/services/auth_service_test.dart b/app/test/services/auth_service_test.dart
new file mode 100644
index 0000000..b44c77d
--- /dev/null
+++ b/app/test/services/auth_service_test.dart
@@ -0,0 +1,116 @@
+import 'dart:io';
+import 'package:dio/dio.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ferna/services/auth_service.dart';
+import 'package:ferna/services/http_client.dart';
+import 'package:mockito/mockito.dart';
+import '../mocks.mocks.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  group('AuthService.signup', () {
+    late MockDio mockDio;
+    late AuthService authService;
+
+    setUp(() async {
+      // Create a temporary directory for cookie storage
+      final tempDir = Directory.systemTemp.createTempSync();
+      final cookieDirPath = '${tempDir.path}/cookies_test/';
+
+      // Initialize HttpClient, passing the temp folder so path_provider isn't needed
+      await HttpClient.instance.init(
+        baseUrl: 'http://example.com',
+        testCookieDir: cookieDirPath,
+      );
+
+      // Create and assign the mocked Dio
+      mockDio = MockDio();
+      HttpClient.instance.dio = mockDio;
+
+      // Grab the singleton AuthService (it will use HttpClient.instance.dio)
+      authService = AuthService.instance;
+    });
+
+    test('returns user_id on success (201 + success:true)', () async {
+      // Arrange: stub the mock response with status 201 and {"success": true, "user_id": 42}
+      final fakeResponse = Response(
+        data: {'success': true, 'user_id': 42},
+        statusCode: 201,
+        requestOptions: RequestOptions(path: '/auth/local/signup'),
+      );
+      when(
+        mockDio.post(
+          '/auth/local/signup',
+          data: anyNamed('data'),
+        ),
+      ).thenAnswer((_) async => fakeResponse);
+
+      // Act:
+      final result = await authService.signup(
+        email: 'test@example.com',
+        password: 'password123',
+      );
+
+      // Assert:
+      expect(result, 42);
+
+      // The actual implementation sends { "user": ..., "passwd": ... }
+      verify(
+        mockDio.post(
+          '/auth/local/signup',
+          data: {'user': 'test@example.com', 'passwd': 'password123'},
+        ),
+      ).called(1);
+    });
+
+    test('throws when server returns success:false', () async {
+      // Arrange: server returns 200 but { "success": false, "error": "Invalid data" }
+      final fakeResponse = Response(
+        data: {'success': false, 'error': 'Invalid data'},
+        statusCode: 200,
+        requestOptions: RequestOptions(path: '/auth/local/signup'),
+      );
+      when(
+        mockDio.post(
+          '/auth/local/signup',
+          data: anyNamed('data'),
+        ),
+      ).thenAnswer((_) async => fakeResponse);
+
+      // Act & Assert: signup() should throw because success is false.
+      expect(
+        () async => await authService.signup(
+          email: 'bad@example.com',
+          password: 'short',
+        ),
+        throwsA(isA<Exception>()),
+      );
+    });
+
+    test('throws when HTTP status is non-200/201', () async {
+      // Arrange: server returns 500 status
+      final fakeResponse = Response(
+        data: 'Internal Server Error',
+        statusCode: 500,
+        requestOptions: RequestOptions(path: '/auth/local/signup'),
+        statusMessage: 'Internal Server Error',
+      );
+      when(
+        mockDio.post(
+          '/auth/local/signup',
+          data: anyNamed('data'),
+        ),
+      ).thenAnswer((_) async => fakeResponse);
+
+      // Act & Assert:
+      expect(
+        () async => await authService.signup(
+          email: 'test@example.com',
+          password: 'password123',
+        ),
+        throwsA(isA<Exception>()),
+      );
+    });
+  });
+}
diff --git a/app/test/widget_test.dart b/app/test/widget_test.dart
deleted file mode 100644
index df71632..0000000
--- a/app/test/widget_test.dart
+++ /dev/null
@@ -1,30 +0,0 @@
-// This is a basic Flutter widget test.
-//
-// To perform an interaction with a widget in your test, use the WidgetTester
-// utility in the flutter_test package. For example, you can send tap and scroll
-// gestures. You can also use WidgetTester to find child widgets in the widget
-// tree, read text, and verify that the values of widget properties are correct.
-
-import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'package:ferna/main.dart';
-
-void main() {
-  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
-    // Build our app and trigger a frame.
-    await tester.pumpWidget(const MyApp());
-
-    // Verify that our counter starts at 0.
-    expect(find.text('0'), findsOneWidget);
-    expect(find.text('1'), findsNothing);
-
-    // Tap the '+' icon and trigger a frame.
-    await tester.tap(find.byIcon(Icons.add));
-    await tester.pump();
-
-    // Verify that our counter has incremented.
-    expect(find.text('0'), findsNothing);
-    expect(find.text('1'), findsOneWidget);
-  });
-}