Update iOS deployment target to 13.0, enhance Flutter integration, and improve tender submission flow

- Changed the iOS deployment target from 12.0 to 13.0 in Podfile and project settings.
- Updated AppDelegate to support implicit Flutter engine initialization.
- Modified Info.plist to include scene configuration for multiple scenes.
- Enhanced CompletionOfDocumentsRouteData to accept a tenderId parameter.
- Implemented tender submission functionality in TenderDetailViewModel and updated UI components to reflect loading states and success/error messages.
- Added new strings for submission success and error notifications.

lib/view_models/your_tenders_view_model.dart

@@ -206,7 +206,9 @@ class YourTendersViewModel with ChangeNotifier {
         offset: _tendersOffset,
       );
       await getTenders(requestModel: requestModel);
-    } else if (selectedStatus == YourTendersStrings.tendersSubmitted) {
+    } else if (selectedStatus == YourTendersStrings.tendersSubmitted ||
+        selectedStatus == TenderApprovalStatus.submitted.value ||
+        selectedStatus == TenderApprovalStatus.approved.value) {
       final requestModel = GetTendersRequestModel(
         status: TenderApprovalStatus.submitted.value,
         createdFrom: startDateUnix,
@@ -299,10 +301,17 @@ class YourTendersViewModel with ChangeNotifier {
         reset: true,
       );
     } else if (selectedStatus == TenderApprovalStatus.approved.value) {
-      await getTendersFeedback(
-        feedbackType: TenderApprovalStatus.approved.value,
-        reset: true,
+      // "Approved tenders" maps to submitted tender-approvals. The API has no
+      // `approved` value; approved tenders are the ones a company has submitted
+      // for pursuit (GET /api/v1/tender-approvals?status=submitted).
+      final requestModel = GetTendersRequestModel(
+        status: TenderApprovalStatus.submitted.value,
+        createdFrom: startDateUnix,
+        createdTo: endDateUnix,
+        limit: _tendersLimit,
+        offset: _tendersOffset,
       );
+      await getTenders(requestModel: requestModel, reset: true);
     }
   }