update api

lib/core/network/dio_client.dart

@@ -5,6 +5,7 @@ import 'api_interceptor.dart';
 /// Dio HTTP client configuration
 class DioClient {
   late final Dio _dio;
+  String? _authToken;
 
   DioClient() {
     _dio = Dio(
@@ -21,10 +22,35 @@ class DioClient {
     );
 
     _dio.interceptors.add(ApiInterceptor());
+
+    // Add auth interceptor to inject token
+    _dio.interceptors.add(
+      InterceptorsWrapper(
+        onRequest: (options, handler) {
+          if (_authToken != null) {
+            options.headers[ApiConstants.authorization] = 'Bearer $_authToken';
+          }
+          return handler.next(options);
+        },
+      ),
+    );
   }
 
   Dio get dio => _dio;
 
+  /// Set authentication token for all future requests
+  void setAuthToken(String token) {
+    _authToken = token;
+  }
+
+  /// Clear authentication token
+  void clearAuthToken() {
+    _authToken = null;
+  }
+
+  /// Check if auth token is set
+  bool get hasAuthToken => _authToken != null;
+
   /// GET request
   Future<Response> get(
     String path, {