added string for every screen and removed from app strings

lib/views/detail/pages/detail_desktop_page.dart

@@ -7,9 +7,9 @@ import 'package:tm_app/views/detail/widgets/tender_detail_action.dart';
 import 'package:tm_app/views/detail/widgets/tender_detail_card.dart';
 import 'package:tm_app/views/detail/widgets/tender_detail_header.dart';
 
-import '../../../core/constants/strings.dart';
 import '../../../core/routes/app_routes.dart';
 import '../../shared/desktop_navigation_widget.dart';
+import '../strings/tender_details_strings.dart';
 
 class TenderDetailDesktopPage extends StatefulWidget {
   final String tenderId;
@@ -34,28 +34,36 @@ class _TenderDetailDesktopPageState extends State<TenderDetailDesktopPage> {
         viewModel.status == 'submitted' &&
         viewModel.approvalStatus == true) {
       ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(AppStrings.tenderSubmittedSuccessfully)),
+        SnackBar(
+          content: Text(TenderDetailsStrings.tenderSubmittedSuccessfully),
+        ),
       );
     }
     if (viewModel.status.isNotEmpty &&
         viewModel.status == 'unsubmitted' &&
         viewModel.approvalStatus == true) {
       ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(AppStrings.tenderUnsubmittedSuccessfully)),
+        SnackBar(
+          content: Text(TenderDetailsStrings.tenderUnsubmittedSuccessfully),
+        ),
       );
     }
     if (viewModel.status.isNotEmpty &&
         viewModel.status == 'rejected' &&
         viewModel.approvalStatus == true) {
       ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(AppStrings.tenderRejectedSuccessfully)),
+        SnackBar(
+          content: Text(TenderDetailsStrings.tenderRejectedSuccessfully),
+        ),
       );
     }
     if (viewModel.status.isNotEmpty &&
         viewModel.status == 'unrejected' &&
         viewModel.approvalStatus == true) {
       ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(AppStrings.tenderUnrejectedSuccessfully)),
+        SnackBar(
+          content: Text(TenderDetailsStrings.tenderUnrejectedSuccessfully),
+        ),
       );
     }
     if (viewModel.approvalStatus != false && viewModel.errorMessage != null) {
@@ -98,7 +106,9 @@ class _TenderDetailDesktopPageState extends State<TenderDetailDesktopPage> {
 
             final detail = tenderViewModel.tenderDetail;
             if (detail == null) {
-              return const Center(child: Text(AppStrings.tenderNoData));
+              return const Center(
+                child: Text(TenderDetailsStrings.tenderNoData),
+              );
             }
 
             return Column(