fix: Step7 UI坍塌修复+EventBus打通 + DRY抽离spxy/ks + GridSearchCV→RandomizedSearchCV + smoke test死链修复

src/new/views/step7_view.py

@@ -27,7 +27,7 @@ from PyQt5.QtCore import Qt
 from PyQt5.QtGui import QBrush, QColor, QFont
 from PyQt5.QtWidgets import (
     QCheckBox, QGroupBox, QHBoxLayout, QLabel, QListWidget,
-    QListWidgetItem, QMessageBox, QPushButton, QVBoxLayout,
+    QListWidgetItem, QMessageBox, QPushButton, QSizePolicy, QVBoxLayout,
 )
 
 from src.gui.components.custom_widgets import FileSelectWidget
@@ -127,6 +127,8 @@ class Step7View(BaseView):
 
         self.formula_list = QListWidget()
         self.formula_list.setSelectionMode(QListWidget.MultiSelection)
+        self.formula_list.setMinimumHeight(300)
+        self.formula_list.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
         # view 层不需要 itemChanged 副作用；service 接管时再启用
         self.formula_list.blockSignals(True)
         formula_outer_layout.addWidget(self.formula_list)
@@ -149,7 +151,7 @@ class Step7View(BaseView):
         self.run_btn = QPushButton("立即执行计算")
         self.run_btn.setStyleSheet(ModernStylesheet.get_button_stylesheet("success"))
         self.run_btn.setMinimumHeight(40)
-        self.run_btn.clicked.connect(self._on_run_clicked)
+        self.run_btn.clicked.connect(self._on_run_single_clicked)
         layout.addWidget(self.run_btn)
 
         layout.addStretch()
@@ -316,5 +318,7 @@ class Step7View(BaseView):
     # ------------------------------------------------------------------
     # 执行入口
     # ------------------------------------------------------------------
-    def _on_run_clicked(self):
-        self.dispatch_execute("step7", self.get_config())
+    def _on_run_single_clicked(self):
+        from src.gui.core.event_bus import global_event_bus
+        config = self.get_config()
+        global_event_bus.publish('RequestRunSingleStep', {'step_name': 'step7', 'config': config})