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>

interfaces/i_material_extractor.py

@@ -0,0 +1,53 @@
+"""
+物料信息提取接口
+定义从页面提取物料信息的抽象接口
+"""
+
+from abc import ABC, abstractmethod
+from playwright.sync_api import Frame
+from typing import List
+from models.material_info import MaterialInfo
+
+
+class IMaterialExtractor(ABC):
+    """物料信息提取接口"""
+
+    @abstractmethod
+    def extract_detail_count(self, frame: Frame) -> int:
+        """
+        提取详细信息数量
+
+        Args:
+            frame: 目标 iframe
+
+        Returns:
+            详细信息数量
+        """
+        pass
+
+    @abstractmethod
+    def extract_detail_status(self, frame: Frame) -> str:
+        """
+        提取备料状态
+
+        Args:
+            frame: 目标 iframe
+
+        Returns:
+            备料状态文本
+        """
+        pass
+
+    @abstractmethod
+    def extract_materials(self, frame: Frame, count: int) -> List[MaterialInfo]:
+        """
+        提取所有物料信息
+
+        Args:
+            frame: 目标 iframe
+            count: 物料数量
+
+        Returns:
+            物料信息列表
+        """
+        pass