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/gui/ALUserTreeWidget.py

@@ -10,14 +10,22 @@ See the LICENSE file for details.
 from enum import Enum
 
 from PySide6.QtCore import (
-    Qt, QSize, QCoreApplication, QRect, QPoint
+    Qt,
+    QSize,
+    QCoreApplication,
+    QRect,
+    QPoint
 )
 from PySide6.QtWidgets import (
-    QAbstractScrollArea, QAbstractItemView,
-    QTreeWidget, QTreeWidgetItem
+    QAbstractScrollArea,
+    QAbstractItemView,
+    QTreeWidget,
+    QTreeWidgetItem
 )
 from PySide6.QtGui import (
-     QDragEnterEvent, QDragMoveEvent, QDropEvent
+     QDragEnterEvent,
+     QDragMoveEvent,
+     QDropEvent
 )
 
 
@@ -39,7 +47,6 @@ class ALUserTreeWidget(QTreeWidget):
         self.setupUi()
         self.translateUi()
 
-
     def setupUi(
         self
     ):
@@ -70,7 +77,6 @@ class ALUserTreeWidget(QTreeWidget):
         self.header().setHighlightSections(False)
         self.header().setProperty(u"showSortIndicator", True)
 
-
     def translateUi(
         self
     ):
@@ -78,7 +84,6 @@ class ALUserTreeWidget(QTreeWidget):
         ___qtreewidgetitem = self.headerItem()
         ___qtreewidgetitem.setText(1, QCoreApplication.translate("ALConfigWidget", u"\u72b6\u6001", None));
 
-
     @staticmethod
     def isDragPositionValid(
         target_rect: QRect,
@@ -90,7 +95,6 @@ class ALUserTreeWidget(QTreeWidget):
             y_offset < target_rect.height()*0.8)
         return valid
 
-
     def dragEnterEvent(
         self,
         event: QDragEnterEvent
@@ -98,7 +102,6 @@ class ALUserTreeWidget(QTreeWidget):
 
         super().dragEnterEvent(event)
 
-
     def dragMoveEvent(
         self,
         event: QDragMoveEvent
@@ -136,7 +139,6 @@ class ALUserTreeWidget(QTreeWidget):
             return
         event.acceptProposedAction()
 
-
     def dropEvent(
         self,
         event: QDropEvent