Refactor tender dialogs to utilize ViewModel and improve state management

- Updated `TendersFilterDialog` and `TendersSortDialog` to use a stateful approach, allowing for better management of selected filters and sorting options.
- Integrated `TendersViewModel` into both dialogs, enabling direct interaction with the view model for setting date ranges and statuses.
- Enhanced the UI to reflect changes in state, ensuring a more responsive user experience when applying filters and sorting.
- Updated the `d_tenders_page.dart` to pass the view model and handle filter and sort actions appropriately.

lib/views/tenders/pages/d_tenders_page.dart

@@ -185,6 +185,7 @@ class _ActionButtons extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final viewModel = context.read<TendersViewModel>();
     return Container(
       margin: EdgeInsets.only(top: 25.0.h()),
       height: 40.0.h(),
@@ -203,9 +204,16 @@ class _ActionButtons extends StatelessWidget {
                       shape: RoundedRectangleBorder(
                         borderRadius: BorderRadius.circular(16),
                       ),
-                      child: const SizedBox(
+                      child: SizedBox(
                         width: 560,
-                        child: TendersFilterDialog(),
+                        child: TendersFilterDialog(
+                          viewModel: viewModel,
+                          onFilterChanged: (dateRange, status) {
+                            viewModel.setDateRange(dateRange);
+                            viewModel.setStatus(status!);
+                            viewModel.callWithSortAndStatus();
+                          },
+                        ),
                       ),
                     ),
               );
@@ -229,9 +237,15 @@ class _ActionButtons extends StatelessWidget {
                       shape: RoundedRectangleBorder(
                         borderRadius: BorderRadius.circular(16),
                       ),
-                      child: const SizedBox(
+                      child: SizedBox(
                         width: 560,
-                        child: TendersSortDialog(),
+                        child: TendersSortDialog(
+                          viewModel: viewModel,
+                          onConfirm: (sort) {
+                            viewModel.setSort(sort);
+                            viewModel.callWithSortAndStatus();
+                          },
+                        ),
                       ),
                     ),
               );