Refactor tender detail models and UI components for improved clarity and functionality

- Updated the `Lot`, `Organization`, and `OrganizationAddress` models to enhance data mapping for tender details.
- Revised the `TenderData` model to include additional fields reflecting the API response structure.
- Improved UI components across desktop, mobile, and tablet views by commenting out unused sections for future use.
- Added new string constants for lot details in the tender information section.
- Enhanced unit tests to cover new model fields and ensure resilience to partial API payloads.

lib/views/detail/strings/tender_details_strings.dart

@@ -42,13 +42,13 @@ class TenderDetailsStrings {
   static const String requestSuccessfullyRegistered =
       'Your request has been successfully registered.';
   static const String confirmAndClose = 'Confirm and close';
-  // AI-NOTE (for PR reviewer): Formal toast copy shown after the user confirms
-  // the Accept/submission modal (see tender_detail_action.dart).
+  // Toast copy shown after the user confirms the Accept/submission modal
+  // (see tender_detail_action.dart).
   static const String submissionReceived =
       'Thank you. We have received your submission and will be in touch with you shortly.';
 
-  // AI-NOTE (for PR reviewer): Field labels added for the rewritten
-  // tender-details info section (one per backend field rendered there).
+  // Field labels for the tender-details info section (one per backend field
+  // rendered there).
   // Tender detail field labels
   static const String noticeTypeCode = 'Notice Type';
   static const String formType = 'Form Type';
@@ -71,4 +71,6 @@ class TenderDetailsStrings {
   static const String tenderId = 'Tender ID';
   static const String lots = 'Lots';
   static const String lotId = 'Lot ID';
+  static const String lotTitle = 'Title';
+  static const String lotDescription = 'Description';
 }