style: normalize code formatting across the codebase

- Standardize quote style (single to double quotes)
- Improve code formatting consistency
- Apply formatting to utilities, GUI components, and tools
- Update imports and docstrings for consistency

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

db/materials_to_delete.py

@@ -2,6 +2,7 @@
 待删除物料查询组件
 从数据库查询指定负责人需要删除的物料名称
 """
+
 from typing import List, Dict, Any
 from db.connection import get_connection
 
@@ -25,7 +26,7 @@ def get_materials_to_delete(manager_name):
     with get_connection() as conn:
         results = conn.execute_query(query, (manager_name,))
         # 提取物料名称并去除空值
-        material_names = [row['MaterialName'] for row in results if row['MaterialName']]
+        material_names = [row["MaterialName"] for row in results if row["MaterialName"]]
         return material_names