Initial Flutter project added

lib/providers/auth_provider.dart

@@ -0,0 +1,81 @@
+import 'dart:convert';
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import '../services/auth_service.dart';
+
+class AuthProvider extends ChangeNotifier {
+  final AuthService _service = AuthService();
+
+  bool _loading = false;
+  bool get loading => _loading;
+
+  String? _token;
+  Map<String, dynamic>? _user;
+
+  String? get token => _token;
+  Map<String, dynamic>? get user => _user;
+  bool get isLoggedIn => _token != null && _token!.isNotEmpty;
+
+  AuthProvider() {
+    _loadFromPrefs();
+  }
+
+  Future<void> _loadFromPrefs() async {
+    final prefs = await SharedPreferences.getInstance();
+    _token = prefs.getString('token');
+    final userJson = prefs.getString('user');
+    if (userJson != null) {
+      try {
+        _user = Map<String, dynamic>.from(jsonDecode(userJson));
+      } catch (_) {
+        _user = null;
+      }
+    }
+    notifyListeners();
+  }
+
+  Future<Map<String, dynamic>> login(String loginId, String password) async {
+    _loading = true;
+    notifyListeners();
+
+    final res = await _service.login(loginId, password);
+
+    _loading = false;
+
+    if (res['success'] == true) {
+      final token = res['token']?.toString();
+      final userMap = res['user'] is Map ? Map<String, dynamic>.from(res['user']) : null;
+
+      if (token != null && userMap != null) {
+        await _saveSession(token, userMap);
+      }
+    }
+
+    notifyListeners();
+    return res;
+  }
+
+  Future<void> _saveSession(String token, Map<String, dynamic> userMap) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString('token', token);
+    await prefs.setString('user', jsonEncode(userMap));
+    _token = token;
+    _user = userMap;
+  }
+
+  Future<void> logout() async {
+    // optional: call API logout if implemented
+    if (_token != null) {
+      try {
+        await _service.logout(_token!);
+      } catch (_) {}
+    }
+
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove('token');
+    await prefs.remove('user');
+    _token = null;
+    _user = null;
+    notifyListeners();
+  }
+}