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/connection.py

@@ -3,6 +3,7 @@ SQL Server 数据库连接组件
 
 提供数据库连接和查询接口
 """
+
 import pyodbc
 from typing import List, Dict, Any, Optional
 import sys
@@ -17,12 +18,12 @@ from config.defaults import DEFAULT_APP_CONFIG
 
 # 从默认配置获取数据库配置
 SQL_SERVER_CONFIG = {
-    'driver': DEFAULT_APP_CONFIG.database.driver,
-    'server': DEFAULT_APP_CONFIG.database.server,
-    'database': DEFAULT_APP_CONFIG.database.database,
-    'username': DEFAULT_APP_CONFIG.database.username,
-    'password': DEFAULT_APP_CONFIG.database.password,
-    'TrustServerCertificate': DEFAULT_APP_CONFIG.database.trust_server_certificate,
+    "driver": DEFAULT_APP_CONFIG.database.driver,
+    "server": DEFAULT_APP_CONFIG.database.server,
+    "database": DEFAULT_APP_CONFIG.database.database,
+    "username": DEFAULT_APP_CONFIG.database.username,
+    "password": DEFAULT_APP_CONFIG.database.password,
+    "TrustServerCertificate": DEFAULT_APP_CONFIG.database.trust_server_certificate,
 }
 
 
@@ -61,7 +62,9 @@ class DatabaseConnection:
 
         try:
             self.connection = pyodbc.connect(conn_str)
-            print(f"成功连接到数据库: {self.config['server']}/{self.config['database']}")
+            print(
+                f"成功连接到数据库: {self.config['server']}/{self.config['database']}"
+            )
             return self.connection
         except pyodbc.Error as e:
             print(f"数据库连接失败: {e}")
@@ -74,7 +77,9 @@ class DatabaseConnection:
             self.connection = None
             print("数据库连接已关闭")
 
-    def execute_query(self, sql: str, params: Optional[tuple] = None) -> List[Dict[str, Any]]:
+    def execute_query(
+        self, sql: str, params: Optional[tuple] = None
+    ) -> List[Dict[str, Any]]:
         """
         执行查询语句并返回结果
 
@@ -168,7 +173,7 @@ def query_production_orders(总排号_list: List[str]) -> List[Dict[str, Any]]:
     db = DatabaseConnection()
 
     # 构建占位符字符串
-    placeholders = ','.join(['?' for _ in 总排号_list])
+    placeholders = ",".join(["?" for _ in 总排号_list])
 
     sql = f"""
     SELECT [总排号], [生产订单号], [序号], [订单号], [客户名称], [产品型号]