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/widgets/tender_detail_header.dart

@@ -9,12 +9,6 @@ import 'package:tm_app/views/detail/widgets/tender_detail_info_section.dart';
 import '../../../core/constants/assets.dart';
 import '../../shared/flag.dart';
 import '../strings/tender_details_strings.dart';
-// AI-NOTE (for PR reviewer): Import is intentionally kept but commented out.
-// The static/mock sections it supports (key risks, winning chance, project id,
-// service/requirements/background dropdowns) were disabled — NOT removed —
-// because they were hard-coded placeholders, not backend data. Re-enable this
-// import together with those sections once the API provides that data.
-// import 'detail_drop_down.dart';
 
 class TenderDetailHeader extends StatelessWidget {
   final bool isScreenBig;
@@ -46,27 +40,12 @@ class TenderDetailHeader extends StatelessWidget {
           SizedBox(height: 16.0.h()),
           _locationBudgetRow(),
           SizedBox(height: 24.0.h()),
-          // AI-NOTE (for PR reviewer): The following mock sections are disabled
-          // on purpose (kept for future use). They render hard-coded values, not
-          // backend data, so they are commented out rather than deleted.
-          // _projectId(),
-          // SizedBox(height: 12.0.h()),
-          // _winningChanceAndDificulty(),
-          // SizedBox(height: 24.0.h()),
-          // _keyRisksDropDown(),
-          // SizedBox(height: 24.0.h()),
           Divider(color: AppColors.grey20),
           TenderDetailInfoSection(isScreenBig: isScreenBig, detail: detail),
           SizedBox(height: 24.0.h()),
           _overViewTitle(),
           SizedBox(height: 12.0.h()),
           _descriptionText(),
-          // AI-NOTE (for PR reviewer): Mock dropdowns disabled (kept for future).
-          // _serviceDropDown(),
-          // SizedBox(height: 24.0.h()),
-          // _requirementsDropDown(),
-          // SizedBox(height: 24.0.h()),
-          // _backgroundDropDown(),
         ],
       ),
     );
@@ -94,103 +73,6 @@ class TenderDetailHeader extends StatelessWidget {
     );
   }
 
-  // AI-NOTE (for PR reviewer): The mock widget builders below are intentionally
-  // preserved as commented-out code. They produce static placeholder content
-  // (not backend-driven) and will be reinstated once the API supplies the
-  // corresponding fields. Do not flag them as dead code — keep as-is.
-  /*
-  Widget _serviceDropDown() =>
-      const DetailDropDown(title: 'Servive/Product', items: []);
-
-  Widget _backgroundDropDown() =>
-      const DetailDropDown(title: 'Background', items: []);
-
-  Widget _requirementsDropDown() {
-    return const DetailDropDown(
-      title: 'Requirements (Summary)',
-      items: [
-        'Market consultation for selecting and procuring a Customer Data Platform (CDP) to unify student data from multiple sources and improve personalization and marketing.',
-      ],
-    );
-  }
-
-  Widget _keyRisksDropDown() {
-    return const DetailDropDown(
-      title: 'Key risks & dealbreakers',
-      items: [
-        'ISO 27001:2022 likely mandatory for future tender.',
-        'Lack of past performance — public sector values references.',
-        'Implementation & ongoing support required (1–5 person team expectation).',
-      ],
-    );
-  }
-
-  Widget _winningChanceAndDificulty() {
-    return Row(
-      children: [
-        Container(
-          height: 24.0.h(),
-          padding: EdgeInsets.symmetric(
-            horizontal: 16.0.w(),
-            vertical: 4.0.h(),
-          ),
-          decoration: BoxDecoration(
-            color: AppColors.blue0,
-            borderRadius: BorderRadius.circular(8),
-          ),
-          child: Text(
-            'Winning chance: <5%',
-            style: TextStyle(
-              color: AppColors.blue10,
-              fontSize: 12.0.sp(),
-              fontWeight: FontWeight.w500,
-            ),
-          ),
-        ),
-        SizedBox(width: 12.0.w()),
-        Container(
-          height: 24.0.h(),
-          padding: EdgeInsets.symmetric(
-            horizontal: 16.0.w(),
-            vertical: 4.0.h(),
-          ),
-          decoration: BoxDecoration(
-            color: AppColors.blue0,
-            borderRadius: BorderRadius.circular(8),
-          ),
-          child: Text(
-            'Difficulty 2/5',
-            style: TextStyle(
-              color: AppColors.blue10,
-              fontSize: 12.0.sp(),
-              fontWeight: FontWeight.w500,
-            ),
-          ),
-        ),
-      ],
-    );
-  }
-
-  Widget _projectId() {
-    return Container(
-      height: 24.0.h(),
-      padding: EdgeInsets.symmetric(horizontal: 16.0.w(), vertical: 4.0.h()),
-      decoration: BoxDecoration(
-        color: AppColors.blue0,
-        borderRadius: BorderRadius.circular(8),
-      ),
-      child: Text(
-        'Project ID 6243372025NLD',
-        style: TextStyle(
-          color: AppColors.blue10,
-          fontSize: 12.0.sp(),
-          fontWeight: FontWeight.w500,
-        ),
-      ),
-    );
-  }
-  */
-
   Widget _locationBudgetRow() {
     return Row(
       children: [