Removes user-specific repository methods

Removes the now-unnecessary user-specific methods from the category and tag repositories. The repositories are now user-specific at the box level, so filtering by user ID within the repository methods is redundant.

Also, removes now-unused imports related to user logic in category and tag list pages, and the add transaction dialog.

lib/data/repositories/hive_category_repository.dart

@@ -71,39 +71,6 @@ class HiveCategoryRepository implements ICategoryRepository {
     }
   }
 
-  // Новые методы для работы с пользователями
-  
-  @override
-  Future<List<Category>> getAllByUser(String userId) async {
-    try {
-      return _box.values.toList();
-    } catch (e) {
-      throw Exception('Ошибка получения категорий пользователя: $e');
-    }
-  }
-
-  @override
-  Future<List<Category>> getIncomeCategoriesByUser(String userId) async {
-    try {
-      return _box.values
-          .where((c) => c.isIncome)
-          .toList();
-    } catch (e) {
-      throw Exception('Ошибка получения категорий доходов пользователя: $e');
-    }
-  }
-
-  @override
-  Future<List<Category>> getExpenseCategoriesByUser(String userId) async {
-    try {
-      return _box.values
-          .where((c) => !c.isIncome)
-          .toList();
-    } catch (e) {
-      throw Exception('Ошибка получения категорий расходов пользователя: $e');
-    }
-  }
-
   @override
   Future<void> addAll(List<Category> categories) async {
     try {

lib/data/repositories/hive_tag_repository.dart

@@ -40,12 +40,6 @@ class HiveTagRepository implements ITagRepository {
     await _box.delete(id);
   }
 
-  @override
-  Future<List<Tag>> getAllByUser(String userId) async {
-    // Фильтрация по userId больше не требуется, так как бокс уже пользовательский
-    return _box.values.toList();
-  }
-
   @override
   Future<void> addAll(List<Tag> tags) async {
     final Map<String, Tag> tagMap = {

lib/pages/category/category_list_page.dart

@@ -4,7 +4,6 @@ import 'package:budget_app/models/category.dart';
 import 'package:budget_app/pages/category/category_edit_page.dart';
 import 'package:budget_app/pages/category/widgets/add_category_button.dart';
 import 'package:budget_app/pages/category/widgets/category_list_item.dart';
-import 'package:budget_app/logic/user/user_cubit.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:get_it/get_it.dart';

lib/pages/home/widgets/add_transaction_dialog.dart

@@ -12,7 +12,6 @@ import '../../../data/repositories/interfaces/itag_repository.dart';
 import '../../../models/category.dart';
 import '../../../models/tag.dart';
 import '../../../models/transaction_record.dart';
-import '../../../logic/user/user_cubit.dart';
 import '../../../utils/category_utils.dart';
 
 class AddTransactionDialog extends StatefulWidget {

lib/pages/tag/tag_list_page.dart

@@ -5,7 +5,6 @@ import 'package:budget_app/models/tag.dart';
 import 'package:budget_app/pages/tag/tag_edit_page.dart';
 import 'package:budget_app/pages/tag/widgets/add_tag_button.dart';
 import 'package:budget_app/pages/tag/widgets/tag_list_item.dart';
-import 'package:budget_app/logic/user/user_cubit.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:get_it/get_it.dart';