feat: добавить адаптер IconData для Hive

lib/data/database/hive_service.dart

@@ -1,6 +1,7 @@
 import 'package:hive_ce_flutter/hive_flutter.dart';
 import 'package:logger/logger.dart';
 import '/models/category.dart';
+import '/models/icon_data_adapter.dart';
 import '/models/tag.dart';
 import '/models/transaction_record.dart';
 import '/utils/category_utils.dart';
@@ -19,6 +20,9 @@ class HiveService {
     await Hive.initFlutter();
     
     // Регистрация адаптеров
+    if (!Hive.isAdapterRegistered(IconDataAdapter().typeId)) {
+      Hive.registerAdapter(IconDataAdapter());
+    }
     if (!Hive.isAdapterRegistered(CategoryAdapter().typeId)) {
       Hive.registerAdapter(CategoryAdapter());
     }

lib/models/icon_data_adapter.dart

@@ -0,0 +1,22 @@
+import 'package:flutter/material.dart';
+import 'package:hive/hive.dart';
+
+class IconDataAdapter extends TypeAdapter<IconData> {
+  @override
+  final typeId = 100; // Уникальный ID, не пересекающийся с другими адаптерами
+
+  @override
+  IconData read(BinaryReader reader) {
+    return IconData(
+      reader.readInt(), // codePoint
+      fontFamily: reader.readString(), // fontFamily
+    );
+  }
+
+  @override
+  void write(BinaryWriter writer, IconData obj) {
+    writer
+      ..writeInt(obj.codePoint)
+      ..writeString(obj.fontFamily ?? 'MaterialIcons');
+  }
+}