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/data/services/model/lot/lot.dart

@@ -5,9 +5,9 @@ import 'package:freezed_annotation/freezed_annotation.dart';
 part 'lot.freezed.dart';
 part 'lot.g.dart';
 
-// AI-NOTE (for PR reviewer): New model for entries in the tender-details
-// `lots` array. Only lot_id, title and description are mapped — the fields the
-// tender-details "Lots" section renders. Add more fields here if the UI grows.
+// Model for entries in the tender-details `lots` array. Only lot_id, title and
+// description are mapped — the fields the tender-details "Lots" section renders.
+// Add more fields here if the UI grows.
 @freezed
 abstract class Lot with _$Lot {
   const factory Lot({

lib/data/services/model/organization/organization.dart

@@ -6,11 +6,11 @@ import 'package:tm_app/data/services/model/organization/organization_address.dar
 part 'organization.freezed.dart';
 part 'organization.g.dart';
 
-// AI-NOTE (for PR reviewer): Added company_id and a nested address
-// (OrganizationAddress) to surface buyer details on the tender-details page.
-// A dedicated OrganizationAddress type is used instead of the existing
-// `Address` model because the buyer address shape differs (city_name +
-// country_code only) and is unrelated to the user-profile Address.
+// company_id and a nested address (OrganizationAddress) surface buyer details
+// on the tender-details page. A dedicated OrganizationAddress type is used
+// instead of the existing `Address` model because the buyer address shape
+// differs (city_name + country_code only) and is unrelated to the user-profile
+// Address.
 @freezed
 abstract class Organization with _$Organization {
   const factory Organization({

lib/data/services/model/organization/organization_address.dart

@@ -5,10 +5,10 @@ import 'package:freezed_annotation/freezed_annotation.dart';
 part 'organization_address.freezed.dart';
 part 'organization_address.g.dart';
 
-// AI-NOTE (for PR reviewer): New model for the buyer_organization.address
-// object from the tender-details API. Kept separate from the existing profile
-// `Address` model because the shapes differ (this one only needs city_name and
-// country_code). Only the fields the UI shows are mapped.
+// Model for the buyer_organization.address object from the tender-details API.
+// Kept separate from the existing profile `Address` model because the shapes
+// differ (this one only needs city_name and country_code). Only the fields the
+// UI shows are mapped.
 @freezed
 abstract class OrganizationAddress with _$OrganizationAddress {
   const factory OrganizationAddress({

lib/data/services/model/tender_data/tender_data.dart

@@ -8,13 +8,12 @@ import 'package:tm_app/data/services/model/organization/organization.dart';
 part 'tender_data.freezed.dart';
 part 'tender_data.g.dart';
 
-// AI-NOTE (for PR reviewer): New fields were added to mirror the
-// /tenders/details/:id response so the tender-details page can show them:
-// notice_type_code, form_type, notice_language_code, issue_date, issue_time,
-// lots, official_languages. issue_date/issue_time reuse unixTimestampFromJson
-// (epoch seconds, tolerant of ms/string) like the other timestamp fields. All
-// fields are nullable to stay resilient to partial API payloads. Freezed/json
-// codegen (.freezed.dart/.g.dart) was regenerated for these.
+// Fields mirror the /tenders/details/:id response so the tender-details page
+// can show them: notice_type_code, form_type, notice_language_code, issue_date,
+// issue_time, lots, official_languages. issue_date/issue_time reuse
+// unixTimestampFromJson (epoch seconds, tolerant of ms/string) like the other
+// timestamp fields. All fields are nullable to stay resilient to partial API
+// payloads.
 @freezed
 abstract class TenderData with _$TenderData {
   const factory TenderData({