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>

models/__init__.py

@@ -0,0 +1,5 @@
+"""数据模型模块 - 定义数据结构"""
+
+from models.material_info import MaterialInfo
+
+__all__ = ["MaterialInfo"]

models/material_info.py

@@ -0,0 +1,19 @@
+"""
+物料信息数据模型
+定义物料信息的数据结构
+"""
+
+from dataclasses import dataclass
+from typing import Optional
+
+
+@dataclass
+class MaterialInfo:
+    """物料信息"""
+
+    serial_number: int  # 序号
+    code: str  # 物料编码
+    name: str  # 物料名称
+    pending_quantity: str  # 累计待发数量
+    shipped_quantity: str  # 累计出库数量
+    should_delete: bool = False  # 是否需要删除