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/ui_constants.py

@@ -0,0 +1,72 @@
+"""
+UI 常量配置
+集中管理所有 UI 相关的选择器、超时、重试配置
+"""
+
+from dataclasses import dataclass
+
+
+@dataclass
+class Selectors:
+    """CSS 选择器常量"""
+
+    # 搜索相关
+    SEARCH_BTN: str = ".search-component-searchBtn"
+    SEARCH_ICON: str = ".search-name-wrapper > .iconfont"
+    QUERY_BY_ORDER: str = "订单号查询"
+    TAB_ALL: str = "全部"
+    DISPLAY_COUNT_INPUT: str = "#rc_select_0"
+
+    # 订单相关
+    HOT_KEY_HEAD: str = "#hot-key-head_list"
+    MORE_BUTTON: str = "更多"
+    MATERIAL_PLAN: str = "备料计划"
+
+    # iframe
+    FORWARD_FRAME: str = "#forwardFrame"
+    MAIN_IFRAME: str = "#mainiframe"
+
+    # 按钮
+    MODIFY_BUTTON: str = "修改"
+    SAVE_BUTTON: str = "保存"
+    EXPAND_BUTTON: str = "展开"
+
+    # 容器
+    CARD_TABLE_SIDE_BOX: str = ".card-table-side-box"
+
+
+@dataclass
+class Timeouts:
+    """超时配置常量（单位：毫秒）"""
+
+    # 页面加载
+    IFRAME_VISIBLE: int = 15000
+    PLAN_CODE_VISIBLE: int = 30000
+    BUTTON_VISIBLE: int = 10000
+    SERIAL_VISIBLE: int = 10000
+    FORM_VISIBLE: int = 5000
+
+    # 加载等待
+    LOADING_VISIBLE_WAIT: int = 3000
+    LOADING_HIDDEN_WAIT: int = 0  # 无限等待
+
+    # 轮询等待（秒）
+    PLAN_CODE_MAX_WAIT: int = 30  # 最多等待30秒
+    PLAN_CHECK_INTERVAL: float = 0.5  # 每0.5秒检查一次
+
+
+@dataclass
+class RetryConfig:
+    """重试配置"""
+
+    DISPLAY_COUNT_MAX_RETRIES: int = 3
+    EXPECTED_DISPLAY_COUNT: str = "5000"
+
+
+@dataclass
+class UIConstants:
+    """UI 配置总入口"""
+
+    selectors: Selectors = Selectors()
+    timeouts: Timeouts = Timeouts()
+    retry: RetryConfig = RetryConfig()