refactor(style): 统一项目代码风格，整理导入顺序、间距规范与方法排列

- GUI 模块统一 QtCore → QtGui → QtWidgets 导入排列，各类独占一行按字母排序
- 统一类间两空行、类内方法间一空行、函数间一空行的间距规范
- 统一方法排列顺序：__init__ → setupUi → connectSignals → public → Slot → private
- 统一 _widgets 中 ConditionRowFrame/ActionStepFrame 方法命名（populate* / toScript / updateValueWidget）
- LibTimeSelector 迁入 operators/abs 抽象层

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/utils/JSONReader.py

@@ -42,7 +42,6 @@ class JSONReader:
         self.__json_data = None
         self.__read()
 
-
     def __read(
         self
     ):
@@ -59,7 +58,6 @@ class JSONReader:
         except Exception as e:
             raise Exception(f"读取文件时发生未知错误: {e}") from e
 
-
     def read(
         self
     ) -> bool:
@@ -70,14 +68,12 @@ class JSONReader:
             return False
         return True
 
-
     def data(
         self
     ) -> dict:
 
         return self.__json_data.copy()
 
-
     def path(
         self
     ) -> str: