Initial commit: family safety frontend project setup

lib/providers/auth_provider.dart

@@ -0,0 +1,63 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import '../services/auth_service.dart';
+
+class AuthProvider with ChangeNotifier {
+  final AuthService _authService;
+  
+  String _token = '';
+  bool _isLoading = false;
+  String _error = '';
+  
+  AuthProvider({AuthService? authService}) 
+      : _authService = authService ?? AuthService();
+  
+  String get token => _token;
+  bool get isLoggedIn => _token.isNotEmpty;
+  bool get isLoading => _isLoading;
+  String get error => _error;
+  
+  Future<void> login(String login, String password) async {
+    _isLoading = true;
+    _error = '';
+    notifyListeners();
+    
+    try {
+      var response = await _authService.login(login, password);
+      var data = jsonDecode(response);
+      _token = data['token'];
+      notifyListeners();
+    } catch (e) {
+      _error = e.toString();
+      notifyListeners();
+      rethrow;
+    } finally {
+      _isLoading = false;
+      notifyListeners();
+    }
+  }
+  
+  Future<void> register(String login, String password) async {
+    _isLoading = true;
+    _error = '';
+    notifyListeners();
+    
+    try {
+      await _authService.register(login, password);
+      notifyListeners();
+    } catch (e) {
+      _error = e.toString();
+      notifyListeners();
+      rethrow;
+    } finally {
+      _isLoading = false;
+      notifyListeners();
+    }
+  }
+  
+  void logout() {
+    _token = '';
+    notifyListeners();
+  }
+}