feat: Intégration du frontend Flutter depuis YNOV

- Framework: Flutter web
- Pages: Login, inscription, dashboards
- Services: API client, authentification, gestion d'état
- Intégration avec backend NestJS
- Dockerfile pour déploiement web

frontend/lib/services/api/api_config.dart

@@ -0,0 +1,32 @@
+class ApiConfig {
+  // static const String baseUrl = 'http://localhost:3000/api/v1/';
+  static const String baseUrl = 'https://ynov.ptits-pas.fr/api/v1';
+
+  // Auth endpoints
+  static const String login = '/auth/login';
+  static const String register = '/auth/register';
+  static const String refreshToken = '/auth/refresh';
+
+  // Users endpoints
+  static const String users = '/users';
+  static const String userProfile = '/users/profile';
+  static const String userChildren = '/users/children';
+
+  // Dashboard endpoints
+  static const String dashboard = '/dashboard';
+  static const String events = '/events';
+  static const String contracts = '/contracts';
+  static const String conversations = '/conversations';
+  static const String notifications = '/notifications';
+
+   // Headers
+  static Map<String, String> get headers => {
+    'Content-Type': 'application/json',
+    'Accept': 'application/json',
+  };
+
+  static Map<String, String> authHeaders(String token) => {
+    ...headers,
+    'Authorization': 'Bearer $token',
+  };
+}

frontend/lib/services/api/tokenService.dart

@@ -0,0 +1,71 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+class TokenService {
+  // static const _storage = FlutterSecureStorage();
+  static const _tokenKey = 'access_token';
+  static const String _refreshTokenKey = 'refresh_token';
+  static const _roleKey = 'user_role';
+
+  // Stockage du token
+  static Future<void> saveToken(String token) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(_tokenKey, token);
+  }
+
+  // Stockage du refresh token
+  static Future<void> saveRefreshToken(String refreshToken) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(_refreshTokenKey, refreshToken);
+  }
+
+  // Stockage du rôle
+  static Future<void> saveRole(String role) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(_roleKey, role);
+  }
+
+  // Récupération du token
+  static Future<String?> getToken() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getString(_tokenKey);
+  }
+
+  // Récupération du refresh token
+  static Future<String?> getRefreshToken() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getString(_refreshTokenKey);
+  }
+
+  // Récupération du rôle
+  static Future<String?> getRole() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getString(_roleKey);
+  }
+
+  // Suppression du token
+  static Future<void> deleteToken() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove(_tokenKey);
+  }
+
+  // Suppression du refresh token
+  static Future<void> deleteRefreshToken() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove(_refreshTokenKey);
+  }
+
+
+  // Suppression du rôle
+  static Future<void> deleteRole() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove(_roleKey);
+  }
+
+  // Nettoyage complet
+  static Future<void> clearAll() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove(_tokenKey);
+    await prefs.remove(_refreshTokenKey);
+    await prefs.remove(_roleKey);
+  }
+}