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>

tools/analyze_excel.py

@@ -1,14 +1,16 @@
 """
 分析 Excel 文件的数据结构
 """
+
 import pandas as pd
 import openpyxl
 import sys
 
 # 设置输出编码
-if sys.platform == 'win32':
+if sys.platform == "win32":
     import io
-    sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding='utf-8')
+
+    sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding="utf-8")
 
 # 读取 Excel 文件
 file_path = "data/导出文件.xlsx"
@@ -52,12 +54,12 @@ for sheet_name in sheet_names:
     for i, col in enumerate(df.columns):
         print(f"  列 {i}: {col}")
     print(f"\n数据预览:")
-    pd.set_option('display.max_rows', 25)
-    pd.set_option('display.max_columns', 20)
-    pd.set_option('display.width', 200)
-    pd.set_option('display.max_colwidth', 30)
+    pd.set_option("display.max_rows", 25)
+    pd.set_option("display.max_columns", 20)
+    pd.set_option("display.width", 200)
+    pd.set_option("display.max_colwidth", 30)
     print(df)
-    pd.reset_option('display.max_rows')
-    pd.reset_option('display.max_columns')
-    pd.reset_option('display.width')
-    pd.reset_option('display.max_colwidth')
+    pd.reset_option("display.max_rows")
+    pd.reset_option("display.max_columns")
+    pd.reset_option("display.width")
+    pd.reset_option("display.max_colwidth")