refactor: restructure main_clean.py with dependency injection and interfaces

Refactor discrete material cleaner to improve maintainability and testability:

- Introduce dependency injection pattern for service components
- Add interfaces (IPageNavigator, IMaterialExtractor, IDeletionChecker)
- Extract PageNavigator service for page navigation logic
- Extract MaterialExtractor service for data extraction
- Extract DatabaseDeletionChecker service for deletion logic
- Add MaterialInfo data model for structured data
- Centralize configuration (CleanerConfig, UIConstants)
- Implement separation of concerns across services layer

Also includes comprehensive execution mechanism documentation.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

config/__init__.py

@@ -1 +1,6 @@
-# Config package
+"""配置模块 - 集中管理应用配置"""
+
+from config.ui_constants import UIConstants
+from config.cleaner_config import CleanerConfig
+
+__all__ = ["UIConstants", "CleanerConfig"]