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>

config/schema.py

@@ -13,6 +13,7 @@ from pathlib import Path
 @dataclass
 class ERPConfig:
     """ERP 系统配置"""
+
     url: str
     username: str
     password: str
@@ -35,6 +36,7 @@ class ERPConfig:
 @dataclass
 class DatabaseConfig:
     """数据库配置"""
+
     server: str
     database: str
     username: str
@@ -59,6 +61,7 @@ class DatabaseConfig:
 @dataclass
 class PathConfig:
     """文件路径配置"""
+
     data_dir: str
     production_id_file: str
     default_output: str = "离散备料计划维护_合并.xlsx"
@@ -77,6 +80,7 @@ class PathConfig:
 @dataclass
 class ExtractionConfig:
     """数据提取配置"""
+
     batch_size: int = 100
     verbose: bool = True
     auto_convert: bool = True
@@ -95,6 +99,7 @@ class ExtractionConfig:
 @dataclass
 class AppConfig:
     """应用总配置"""
+
     erp: ERPConfig
     database: DatabaseConfig
     paths: PathConfig
@@ -139,5 +144,5 @@ class AppConfig:
                 "verbose": self.extraction.verbose,
                 "auto_convert": self.extraction.auto_convert,
                 "merge_batches": self.extraction.merge_batches,
-            }
+            },
         }