fix home and tenders scrolling and no data problem in tenders

lib/view_models/tenders_view_model.dart

@@ -94,11 +94,12 @@ class TendersViewModel with ChangeNotifier {
   }
 
   Future<void> getTenders() async {
-    clearAll(); // Clear all data before fetching new tenders
     _isLoading = true;
+    notifyListeners();
+    clearAll(); // Clear all data before fetching new tenders
+
     _currentOffset = 0;
     _hasMoreData = true;
-    notifyListeners();
 
     final result = await _tendersRepository.getTenders(
       limit: _pageSize,