refactor: use GET tenders/recommend and improve tender title UX

Load the Recommended tab from GET /api/v1/tenders/recommend instead of the
AI POST flow with 503 fallback. Fix notification pagination offset, make
tender titles selectable across list and detail views, and ignore .cursor.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/view_models/ai_recommendations_view_model.dart

@@ -1,19 +1,15 @@
 import 'package:flutter/foundation.dart';
-import 'package:tm_app/core/network/app_exceptions.dart';
 import 'package:tm_app/core/utils/result.dart';
 import 'package:tm_app/data/repositories/company_ai_repository.dart';
 import 'package:tm_app/data/repositories/home_repository.dart';
-import 'package:tm_app/data/services/model/recommend_response/recommend_response.dart';
-import 'package:tm_app/data/services/model/recommendation_item/recommendation_item.dart';
 import 'package:tm_app/data/services/model/recommended_tenders_response/recommended_tenders_response.dart';
 import 'package:tm_app/data/services/model/tender_data/tender_data.dart';
 
-/// Drives the "Recommended" (AI) tab in the tenders section.
+/// Drives the "Recommended" tab in the tenders section.
 ///
-/// Calls `POST /api/v1/recommend`. When the AI service is unavailable (503) it
-/// falls back to the legacy CPV/keyword list (`GET /api/v1/tenders/recommend`),
-/// and when the AI returns no results shortly after onboarding it surfaces a
-/// "still learning" hint instead of an empty error.
+/// Calls `GET /api/v1/tenders/recommend`. When the result is empty shortly
+/// after onboarding it surfaces a "still learning" hint instead of an empty
+/// error.
 class AiRecommendationsViewModel with ChangeNotifier {
   AiRecommendationsViewModel({
     required CompanyAiRepository companyAiRepository,
@@ -26,21 +22,17 @@ class AiRecommendationsViewModel with ChangeNotifier {
 
   /// How long after onboarding an empty result is treated as "still learning".
   static const Duration _stillLearningWindow = Duration(minutes: 30);
-  static const int _fallbackPageSize = 20;
+  static const int _pageSize = 20;
 
   bool _isLoading = false;
   String? _errorMessage;
-  List<RecommendationItem> _items = const [];
-  List<TenderData> _fallbackTenders = const [];
-  bool _usingFallback = false;
+  List<TenderData> _recommendedTenders = const [];
   bool _stillLearning = false;
   bool _hasLoaded = false;
 
   bool get isLoading => _isLoading;
   String? get errorMessage => _errorMessage;
-  List<RecommendationItem> get items => _items;
-  List<TenderData> get fallbackTenders => _fallbackTenders;
-  bool get usingFallback => _usingFallback;
+  List<TenderData> get recommendedTenders => _recommendedTenders;
   bool get stillLearning => _stillLearning;
 
   /// True once a load has completed (used to distinguish "no results" from
@@ -51,8 +43,7 @@ class AiRecommendationsViewModel with ChangeNotifier {
   bool get isEmpty =>
       !_isLoading &&
       _errorMessage == null &&
-      _items.isEmpty &&
-      _fallbackTenders.isEmpty;
+      _recommendedTenders.isEmpty;
 
   /// Loads recommendations if they haven't been loaded yet this session.
   Future<void> loadIfNeeded() async {
@@ -62,28 +53,32 @@ class AiRecommendationsViewModel with ChangeNotifier {
     await loadRecommendations();
   }
 
-  /// Loads AI recommendations, applying the 503 fallback and empty-state logic.
+  /// Loads recommended tenders for the Recommended tab.
   Future<void> loadRecommendations() async {
     _isLoading = true;
     _errorMessage = null;
-    _usingFallback = false;
     _stillLearning = false;
     notifyListeners();
 
-    final result = await _companyAiRepository.getRecommendations();
+    final result = await _homeRepository.getHomeRecommendedTenders(
+      limit: _pageSize,
+      offset: 0,
+    );
 
     var loadedSuccessfully = false;
 
     switch (result) {
-      case Ok<RecommendResponse>():
-        _items = result.value.data ?? const [];
-        _fallbackTenders = const [];
-        if (_items.isEmpty) {
+      case Ok<RecommendedTendersResponse>():
+        _recommendedTenders =
+            result.value.data?.tenders.whereType<TenderData>().toList() ??
+            const [];
+        if (_recommendedTenders.isEmpty) {
           _stillLearning = _onboardingWasRecent();
         }
         loadedSuccessfully = true;
-      case Error<RecommendResponse>():
-        loadedSuccessfully = await _handleError(result.error);
+      case Error<RecommendedTendersResponse>():
+        _recommendedTenders = const [];
+        _errorMessage = result.error.toString();
     }
 
     _isLoading = false;
@@ -94,39 +89,6 @@ class AiRecommendationsViewModel with ChangeNotifier {
   /// Pull-to-refresh: always re-fetches.
   Future<void> refresh() => loadRecommendations();
 
-  Future<bool> _handleError(Exception error) async {
-    // 503 means the AI service isn't configured/available — fall back to the
-    // legacy recommend list rather than showing an error. NetworkManager only
-    // exposes this status when Dio received an HTTP response; connection and
-    // timeout failures have no reliable status code and should remain retryable.
-    if (error is AppException && error.statusCode == 503) {
-      await _loadFallback();
-      return _errorMessage == null;
-    }
-    _items = const [];
-    _fallbackTenders = const [];
-    _errorMessage = error.toString();
-    return false;
-  }
-
-  Future<void> _loadFallback() async {
-    final result = await _homeRepository.getHomeRecommendedTenders(
-      limit: _fallbackPageSize,
-      offset: 0,
-    );
-
-    switch (result) {
-      case Ok<RecommendedTendersResponse>():
-        _items = const [];
-        _fallbackTenders =
-            result.value.data?.tenders.whereType<TenderData>().toList() ??
-            const [];
-        _usingFallback = true;
-      case Error<RecommendedTendersResponse>():
-        _errorMessage = result.error.toString();
-    }
-  }
-
   bool _onboardingWasRecent() {
     final startedAt = _companyAiRepository.lastOnboardingStartedAt();
     if (startedAt == null) {