feat: add AI recommendations flow for tenders

Implement company AI onboarding/recommendation models, services, repository, and tender UI integration with supporting tests.

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

test/model/onboarding_response_test.dart

@@ -0,0 +1,51 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:tm_app/data/services/model/onboarding_response/onboarding_response.dart';
+
+void main() {
+  group('OnboardingResponse Model Test', () {
+    final mockJson = {
+      'success': true,
+      'message': 'AI onboarding started successfully',
+      'data': {'status': 'started'},
+      'error': {'message': null, 'code': null, 'details': null},
+    };
+
+    test('fromJson creates valid OnboardingResponse instance', () {
+      final response = OnboardingResponse.fromJson(mockJson);
+
+      expect(response.success, true);
+      expect(response.message, 'AI onboarding started successfully');
+      expect(response.data?.status, 'started');
+    });
+
+    test('handles null data gracefully', () {
+      final response = OnboardingResponse.fromJson({
+        'success': false,
+        'message': 'AI service not configured',
+        'data': null,
+        'error': {'message': 'unavailable', 'code': '503', 'details': null},
+      });
+
+      expect(response.success, false);
+      expect(response.data, isNull);
+      expect(response.error?.message, 'unavailable');
+    });
+
+    test('toJson round-trips status', () {
+      final response = OnboardingResponse.fromJson(mockJson);
+      final json = response.toJson();
+      final data = Map<String, dynamic>.from(json['data'] as Map);
+
+      expect(json['success'], true);
+      expect(data['status'], 'started');
+    });
+
+    test('equality and copyWith work as expected', () {
+      final response = OnboardingResponse.fromJson(mockJson);
+      final updated = response.copyWith(message: 'Updated');
+
+      expect(updated.message, 'Updated');
+      expect(updated != response, true);
+    });
+  });
+}

test/model/recommend_response_test.dart

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+import 'package:flutter_test/flutter_test.dart';
+import 'package:tm_app/data/services/model/recommend_response/recommend_response.dart';
+
+void main() {
+  group('RecommendResponse Model Test', () {
+    final mockJson = {
+      'success': true,
+      'message': 'AI recommendations retrieved successfully',
+      'data': [
+        {
+          'rank': '1',
+          'tender_id': '674a1b2c3d4e5f6789012345',
+          'analysis': 'Strong match based on company industry and CPV codes.',
+        },
+        {
+          'rank': '2',
+          'tender_id': '674a1b2c3d4e5f6789012346',
+          'analysis': 'Relevant scope and geographic fit.',
+        },
+      ],
+      'error': {'message': null, 'code': null, 'details': null},
+    };
+
+    test('fromJson parses the ranked recommendation list', () {
+      final response = RecommendResponse.fromJson(mockJson);
+
+      expect(response.success, true);
+      expect(response.data, isNotNull);
+      expect(response.data!.length, 2);
+      expect(response.data!.first.rank, '1');
+      expect(response.data!.first.tenderId, '674a1b2c3d4e5f6789012345');
+      expect(
+        response.data!.first.analysis,
+        'Strong match based on company industry and CPV codes.',
+      );
+    });
+
+    test('handles empty data (AI still indexing)', () {
+      final response = RecommendResponse.fromJson({
+        'success': true,
+        'message': 'AI recommendations retrieved successfully',
+        'data': <dynamic>[],
+        'error': null,
+      });
+
+      expect(response.success, true);
+      expect(response.data, isEmpty);
+    });
+
+    test('toJson round-trips the nested items', () {
+      final response = RecommendResponse.fromJson(mockJson);
+      final json = response.toJson();
+      final data = (json['data'] as List).cast<Map<String, dynamic>>();
+
+      expect(json['success'], true);
+      expect(data.length, 2);
+      expect(data[1]['tender_id'], '674a1b2c3d4e5f6789012346');
+      expect(data[1]['rank'], '2');
+    });
+
+    test('equality and copyWith work as expected', () {
+      final response = RecommendResponse.fromJson(mockJson);
+      final updated = response.copyWith(message: 'Updated');
+
+      expect(updated.message, 'Updated');
+      expect(updated != response, true);
+    });
+  });
+}