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

FinlyticApp/lib/features/discovery/repositories/discovery_repository.dart

@@ -0,0 +1,21 @@
+import '../../../core/network/api_client.dart';
+import '../models/discovery_asset_model.dart';
+
+/// Clean Architecture Repository for fetching asset discovery data.
+class DiscoveryRepository {
+  final ApiClient apiClient;
+
+  const DiscoveryRepository({required this.apiClient});
+
+  /// Fetches top discovery assets.
+  Future<List<DiscoveryAssetModel>> getDiscoveryAssets({int limit = 15}) async {
+    final res = await apiClient.get('/api/v1/assets/discovery?limit=$limit');
+    if (res.statusCode == 200 && res.data is List) {
+      return (res.data as List)
+          .whereType<Map<String, dynamic>>()
+          .map((e) => DiscoveryAssetModel.fromJson(e))
+          .toList();
+    }
+    return [];
+  }
+}