solve looping of dio request due to auth interceptor onError handling

lib/api/interceptors/auth_interceptor.dart

@@ -33,7 +33,14 @@ class AuthInterceptor extends Interceptor {
     ErrorInterceptorHandler handler,
   ) async {
     // Handle 401 errors by refreshing token and retrying
-    if (err.response?.statusCode == 401) {
+    final response = err.response;
+    if (response?.statusCode == 401) {
+      final data = response?.data;
+      // Only refresh token if error is NOT INCORRECT_TPIN (or similar business error)
+      if (data is Map && data['error'] == 'INCORRECT_TPIN') {
+        // Pass the error through, do not retry
+        return handler.next(err);
+      }
       // On 401, try to get a new token
       final token = await _authRepository.getAccessToken();