refactor(StorageCleaner): 规范化页面组件目录结构

- 将子组件移至 components/ 子目录（OptionItem、AutoRefreshToggle、CleaningResult、StorageCleanerConfirm、StorageOptionsGrid、ErrorDisplay）
- 创建 __tests__/ 目录结构
- 更新所有相关导入路径

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

src/components/__tests__/StorageCleanerConfirm.test.tsx

@@ -1,6 +1,6 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { fireEvent, render, screen } from '@testing-library/react';
-import { StorageCleanerConfirm } from '@/pages/StorageCleaner/StorageCleanerConfirm';
+import { StorageCleanerConfirm } from '@/pages/StorageCleaner/components/StorageCleanerConfirm';
 import type { StorageCleanerOptions } from '@/types/storage';
 import React from 'react';