some fixes

lib/core/utils/error_utils.dart

@@ -0,0 +1,19 @@
+import 'package:tm_app/core/network/app_exceptions.dart';
+
+/// Utility class for handling error messages
+class ErrorUtils {
+  /// Extracts a clean error message from an Exception
+  static String getErrorMessage(Exception error) {
+    if (error is AppException) {
+      return error.message;
+    }
+
+    // For plain Exception, remove "Exception: " prefix
+    final errorString = error.toString();
+    if (errorString.startsWith('Exception: ')) {
+      return errorString.substring(11);
+    }
+
+    return errorString;
+  }
+}