feat(app): clean architecture with typed repositories, DTO models and calendar event logos

FinlyticApp/lib/features/trades/repositories/trade_repository.dart

@@ -2,11 +2,12 @@ import 'dart:async';
 import 'package:finlytic_app/core/network/api_client.dart';
 import 'package:finlytic_app/features/trades/models/trade_model.dart';
 import 'package:finlytic_app/features/trades/models/trade_acceptance_dto.dart';
+import 'package:finlytic_app/features/trades/models/close_trade_request_dto.dart';
 
 class TradeRepository {
   final ApiClient apiClient;
 
-  TradeRepository({required this.apiClient});
+  const TradeRepository({required this.apiClient});
 
   Future<List<TradeModel>> fetchTrades({String? isin, String? status}) async {
     try {
@@ -24,8 +25,7 @@ class TradeRepository {
       }
       return [];
     } catch (e) {
-      print('Error fetching trades: $e');
-      throw Exception('Trades konnten nicht geladen werden');
+      throw Exception('Trades konnten nicht geladen werden: $e');
     }
   }
 
@@ -36,9 +36,15 @@ class TradeRepository {
     }
   }
 
-  Future<void> closeTrade(String id, {double? exitPrice}) async {
-    final body = exitPrice != null ? {'userExitPrice': exitPrice} : null;
-    final response = await apiClient.post('/api/v1/user/trades/$id/close', data: body);
+  Future<void> rejectTrade(String tradeId) async {
+    final response = await apiClient.post('/api/v1/user/trades/$tradeId/reject');
+    if (response.statusCode != 200) {
+      throw Exception('Trade konnte nicht abgelehnt werden');
+    }
+  }
+
+  Future<void> closeTrade(String id, {CloseTradeRequestDto? dto}) async {
+    final response = await apiClient.post('/api/v1/user/trades/$id/close', data: dto?.toJson());
     if (response.statusCode != 200) {
       throw Exception('Trade konnte nicht geschlossen werden');
     }