fix(gui): step8 QBrush崩溃修复 + step9 自动探测 Traditional_Indices 目录回填

src/gui/panels/step9_panel.py

@@ -315,6 +315,25 @@ class Step9Panel(QWidget):
                     if not existing or not existing.strip():
                         self.csv_file.set_path(step5_output_path)
 
+            # 1.5 自动探测并回填 Step 8 双轨输出的 Traditional_Indices 目录
+            if self.work_dir:
+                trad_indices_dir = os.path.join(
+                    self.work_dir, "11_12_13_predictions", "Traditional_Indices"
+                )
+                if os.path.isdir(trad_indices_dir):
+                    csv_files = [
+                        f for f in os.listdir(trad_indices_dir)
+                        if f.lower().endswith('.csv')
+                    ]
+                    if csv_files:
+                        csv_files.sort()
+                        first_csv = os.path.join(trad_indices_dir, csv_files[0])
+                        existing = self.csv_file.get_path()
+                        if not existing or not existing.strip():
+                            self.csv_file.set_path(first_csv)
+                            self.refresh_csv_columns()
+                            print(f"✅ 自动探测到 Traditional_Indices 目录，加载首个CSV: {csv_files[0]}")
+
             # 2. 自动填充输出目录（9_Custom_Regression_Modeling）
             if self.work_dir:
                 output_dir = os.path.join(self.work_dir, "9_Custom_Regression_Modeling")