界面优化

src/gui/panels/report_generation_panel.py

@@ -195,13 +195,23 @@ class ReportGenerationPanel(QWidget):
             self.text_model_edit.setText(self.vision_model_edit.text())
             self.text_model_edit.blockSignals(False)
 
+    def _get_default_work_dir(self):
+        """获取 work_dir，优先用主窗口缓存的 work_dir"""
+        if self.main_window and hasattr(self.main_window, 'work_dir') and self.main_window.work_dir:
+            return str(self.main_window.work_dir)
+        return ""
+
     def browse_work_dir(self):
-        d = QFileDialog.getExistingDirectory(self, "选择工作目录")
+        default = self._get_default_work_dir()
+        d = QFileDialog.getExistingDirectory(self, "选择工作目录", default)
         if d:
             self.work_dir_edit.setText(d)
 
     def browse_output_dir(self):
-        d = QFileDialog.getExistingDirectory(self, "选择报告输出目录")
+        default = self._get_default_work_dir()
+        if default:
+            default = os.path.join(default, "14_visualization")
+        d = QFileDialog.getExistingDirectory(self, "选择报告输出目录", default)
         if d:
             self.output_dir_edit.setText(d)
 

src/gui/panels/step4_panel.py

@@ -168,7 +168,10 @@ class Step4Panel(QWidget):
 
         try:
             rows_to_preview = max(1, self.preview_rows_spin.value())
-            df = pd.read_csv(csv_path, nrows=rows_to_preview)
+            # dtype=object 确保所有列以字符串读取，避免空值/混合类型导致 dtype 报错
+            df = pd.read_csv(csv_path, nrows=rows_to_preview, dtype=object)
+            # fillna 在 PandasTableModel.__init__ 中已执行，此处再次防御性处理
+            df = df.fillna('')
             if df.empty:
                 self.reset_preview("CSV文件为空")
                 return

src/gui/panels/step5_panel.py

@@ -191,6 +191,15 @@ class Step5Panel(QWidget):
         else:
             self.output_file.set_path("")
 
+        # 5. 尝试从 Step4 界面读取已处理的水质参数 CSV 路径，自动填入本面板
+        main_window = self.window()
+        if main_window and hasattr(main_window, 'step4_panel'):
+            step4_output_path = main_window.step4_panel.output_file.get_path()
+            if step4_output_path:
+                existing_csv = self.csv_file.get_path()
+                if not existing_csv or not existing_csv.strip():
+                    self.csv_file.set_path(step4_output_path)
+
     def run_step(self):
         """独立运行步骤5"""
         # 验证输入

src/gui/panels/step6_5_panel.py

@@ -211,9 +211,52 @@ class Step6_5Panel(QWidget):
         if 'csv_path' in config:
             self.training_csv_file.set_path(config['csv_path'])
 
+    def update_from_config(self, work_dir=None, pipeline=None):
+        """从全局配置自动填充训练数据和输出路径
+
+        Args:
+            work_dir: 工作目录路径
+            pipeline: Pipeline 实例（未使用，保留接口兼容性）
+        """
+        if work_dir:
+            self.work_dir = work_dir
+        elif hasattr(self, 'work_dir') and self.work_dir:
+            pass
+        else:
+            self.work_dir = None
+
+        # 1. 尝试从 Step5 界面读取训练光谱 CSV 路径
+        main_window = self.window()
+        if main_window and hasattr(main_window, 'step5_panel'):
+            step5_output_path = main_window.step5_panel.output_file.get_path()
+            if step5_output_path:
+                existing = self.training_csv_file.get_path()
+                if not existing or not existing.strip():
+                    self.training_csv_file.set_path(step5_output_path)
+
+        # 2. 自动填充输出目录（8_Regression_Modeling）
+        if self.work_dir:
+            output_dir = os.path.join(self.work_dir, "8_Regression_Modeling")
+            os.makedirs(output_dir, exist_ok=True)
+            existing_out = self.output_dir.get_path()
+            if not existing_out or not existing_out.strip():
+                self.output_dir.set_path(output_dir)
+
+    def _get_default_work_dir(self):
+        """获取 work_dir，优先用 panel 自身缓存的，否则尝试从主窗口取"""
+        if hasattr(self, 'work_dir') and self.work_dir:
+            return str(self.work_dir)
+        mw = self.window()
+        if mw and hasattr(mw, 'work_dir') and mw.work_dir:
+            return str(mw.work_dir)
+        return ""
+
     def browse_output_dir(self):
         """浏览输出目录"""
-        dir_path = QFileDialog.getExistingDirectory(self, "选择输出模型目录", "")
+        default = self._get_default_work_dir()
+        if default:
+            default = os.path.join(default, "8_Regression_Modeling")
+        dir_path = QFileDialog.getExistingDirectory(self, "选择输出模型目录", default)
         if dir_path:
             self.output_dir.set_path(dir_path)
 

src/gui/panels/step6_75_panel.py

@@ -280,6 +280,37 @@ class Step6_75Panel(QWidget):
         if 'enabled' in config:
             self.enable_checkbox.setChecked(config['enabled'])
 
+    def update_from_config(self, work_dir=None, pipeline=None):
+        """从全局配置自动填充训练数据和输出路径
+
+        Args:
+            work_dir: 工作目录路径
+            pipeline: Pipeline 实例（未使用，保留接口兼容性）
+        """
+        if work_dir:
+            self.work_dir = work_dir
+        elif hasattr(self, 'work_dir') and self.work_dir:
+            pass
+        else:
+            self.work_dir = None
+
+        # 1. 尝试从 Step5 界面读取训练光谱 CSV 路径
+        main_window = self.window()
+        if main_window and hasattr(main_window, 'step5_panel'):
+            step5_output_path = main_window.step5_panel.output_file.get_path()
+            if step5_output_path:
+                existing = self.csv_file.get_path()
+                if not existing or not existing.strip():
+                    self.csv_file.set_path(step5_output_path)
+
+        # 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")
+            os.makedirs(output_dir, exist_ok=True)
+            existing_out = self.output_dir.text().strip()
+            if not existing_out:
+                self.output_dir.setText(output_dir)
+
     def run_step(self):
         """独立运行步骤6.75"""
         csv_path = self.csv_file.get_path()

src/gui/panels/step6_panel.py

@@ -42,15 +42,15 @@ class Step6Panel(QWidget):
         layout.addWidget(self.ml_page)
 
         # 输出文件路径
-        self.output_dir = FileSelectWidget(
-            "输出模型目录:",
-            "Directories;;All Files (*.*)"
+        self.output_path = FileSelectWidget(
+            "输出文件:",
+            "CSV Files (*.csv);;All Files (*.*)",
+            mode="save"
         )
-        self.output_dir.line_edit.setPlaceholderText("models_output")
-        # 修改浏览按钮为选择目录
-        self.output_dir.browse_btn.clicked.disconnect()
-        self.output_dir.browse_btn.clicked.connect(self.browse_output_dir)
-        layout.addWidget(self.output_dir)
+        self.output_path.line_edit.setPlaceholderText("自动生成，或手动指定输出文件路径...")
+        self.output_path.browse_btn.clicked.disconnect()
+        self.output_path.browse_btn.clicked.connect(self.browse_output_path)
+        layout.addWidget(self.output_path)
 
         # 启用步骤
         self.enable_checkbox = QCheckBox("启用此步骤")
@@ -198,11 +198,38 @@ class Step6Panel(QWidget):
         for checkbox in checkboxes_dict.values():
             checkbox.setChecked(checked)
 
-    def browse_output_dir(self):
-        """浏览输出目录"""
-        dir_path = QFileDialog.getExistingDirectory(self, "选择输出模型目录", "")
-        if dir_path:
-            self.output_dir.set_path(dir_path)
+    def _get_default_work_dir(self):
+        """获取 work_dir，优先用 panel 自身缓存的，否则尝试从主窗口取"""
+        if hasattr(self, 'work_dir') and self.work_dir:
+            return str(self.work_dir)
+        mw = self.window()
+        if mw and hasattr(mw, 'work_dir') and mw.work_dir:
+            return str(mw.work_dir)
+        return ""
+
+    def browse_output_path(self):
+        """浏览输出文件路径（保存对话框）"""
+        current = self.output_path.get_path().strip()
+        if current:
+            initial_dir = os.path.dirname(current)
+            initial_file = os.path.basename(current)
+        else:
+            initial_dir = ""
+            initial_file = ""
+
+        if not initial_dir or not os.path.isdir(initial_dir):
+            # 默认定位到 indices 目录
+            work_dir = self._get_default_work_dir()
+            initial_dir = os.path.join(work_dir, "6_water_quality_indices") if work_dir else ""
+            if initial_dir and not os.path.isdir(initial_dir):
+                os.makedirs(initial_dir, exist_ok=True)
+
+        file_path, _ = QFileDialog.getSaveFileName(
+            self, "保存输出文件", os.path.join(initial_dir, initial_file) if initial_file else initial_dir,
+            "CSV Files (*.csv);;All Files (*.*)"
+        )
+        if file_path:
+            self.output_path.set_path(file_path)
 
     def get_config(self):
         """获取配置"""
@@ -229,7 +256,9 @@ class Step6Panel(QWidget):
         training_csv_path = self.training_csv_file.get_path()
         if training_csv_path:
             config['training_csv_path'] = training_csv_path
-        # 注意：step6_train_models 不接受 output_dir 参数，输出目录由 pipeline 内部根据 work_dir 生成
+        output_path = self.output_path.get_path()
+        if output_path:
+            config['output_path'] = output_path
         return config
 
     def set_config(self, config):
@@ -252,8 +281,8 @@ class Step6Panel(QWidget):
                 checkbox.setChecked(method in methods)
         if 'training_csv_path' in config:
             self.training_csv_file.set_path(config['training_csv_path'])
-        if 'output_dir' in config:
-            self.output_dir.set_path(config['output_dir'])
+        if 'output_path' in config:
+            self.output_path.set_path(config['output_path'])
 
     def update_from_config(self, work_dir=None, pipeline=None):
         """从全局配置自动填充训练数据和输出路径
@@ -288,13 +317,22 @@ class Step6Panel(QWidget):
                 if step5_csv:
                     self.training_csv_file.set_path(step5_csv)
 
-        # 2. 自动填充输出目录（基于工作目录）
+        # 2. 自动填充输出文件路径（基于工作目录和输入文件名）
+        # 输入是 training_spectra.csv → 输出 {work_dir}/6_water_quality_indices/training_spectra_indices.csv
+        # 输入是 sampling_spectra.csv   → 输出 {work_dir}/6_water_quality_indices/sampling_spectra_indices.csv
         if self.work_dir:
-            output_dir = os.path.join(self.work_dir, "7_Supervised_Model_Training")
-            os.makedirs(output_dir, exist_ok=True)
-            self.output_dir.set_path(output_dir.replace('\\', '/'))
+            indices_dir = os.path.join(self.work_dir, "6_water_quality_indices")
+            os.makedirs(indices_dir, exist_ok=True)
+            training_csv = self.training_csv_file.get_path()
+            if training_csv:
+                basename = os.path.splitext(os.path.basename(training_csv))[0]
+                output_file = f"{basename}_indices.csv"
+            else:
+                output_file = "water_quality_indices.csv"
+            output_path = os.path.join(indices_dir, output_file).replace('\\', '/')
+            self.output_path.set_path(output_path)
         else:
-            self.output_dir.set_path("")
+            self.output_path.set_path("")
 
     def run_step(self):
         """独立运行步骤6"""

src/gui/panels/step8_5_panel.py

@@ -4,6 +4,9 @@
 Step8_5 面板 - 非经验模型预测
 """
 
+import os
+from pathlib import Path
+
 from PyQt5.QtWidgets import (
     QWidget, QVBoxLayout, QGroupBox, QFormLayout,
     QPushButton, QCheckBox, QComboBox, QLineEdit, QMessageBox,
@@ -79,15 +82,70 @@ class Step8_5Panel(QWidget):
         layout.addStretch()
         self.setLayout(layout)
 
+    def update_from_config(self, work_dir=None, pipeline=None):
+        """从全局配置自动填充采样光谱和回归模型目录
+
+        Args:
+            work_dir: 工作目录路径
+            pipeline: Pipeline 实例（未使用，保留接口兼容性）
+        """
+        if work_dir:
+            self.work_dir = work_dir
+        elif hasattr(self, 'work_dir') and self.work_dir:
+            pass
+        else:
+            self.work_dir = None
+
+        main_window = self.window()
+
+        # 1. 尝试从 Step7 界面读取全湖采样点 CSV 路径
+        if main_window and hasattr(main_window, 'step7_panel'):
+            step7_output_path = main_window.step7_panel.output_file.get_path()
+            if step7_output_path:
+                existing = self.sampling_csv_file.get_path()
+                if not existing or not existing.strip():
+                    self.sampling_csv_file.set_path(step7_output_path)
+
+        # 2. 尝试从 Step6.5 界面读取回归模型目录
+        if main_window and hasattr(main_window, 'step6_5_panel'):
+            step6_5_models_dir = main_window.step6_5_panel.output_dir.get_path()
+            if step6_5_models_dir:
+                existing_models = self.models_dir_file.get_path()
+                if not existing_models or not existing_models.strip():
+                    self.models_dir_file.set_path(step6_5_models_dir)
+
+        # 3. 自动填充输出路径（非经验模型预测目录）
+        if self.work_dir:
+            output_dir = os.path.join(self.work_dir, "11_12_13_predictions/Non_Empirical_Prediction")
+            os.makedirs(output_dir, exist_ok=True)
+            existing_out = self.output_file.get_path()
+            if not existing_out or not existing_out.strip():
+                self.output_file.set_path(output_dir)
+
+    def _get_default_work_dir(self):
+        """获取 work_dir，优先用 panel 自身缓存的，否则尝试从主窗口取"""
+        if hasattr(self, 'work_dir') and self.work_dir:
+            return str(self.work_dir)
+        mw = self.window()
+        if mw and hasattr(mw, 'work_dir') and mw.work_dir:
+            return str(mw.work_dir)
+        return ""
+
     def browse_models_dir(self):
         """浏览模型目录"""
-        dir_path = QFileDialog.getExistingDirectory(self, "选择模型目录", "")
+        default = self._get_default_work_dir()
+        if default:
+            default = os.path.join(default, "8_Regression_Modeling")
+        dir_path = QFileDialog.getExistingDirectory(self, "选择模型目录", default)
         if dir_path:
             self.models_dir_file.set_path(dir_path)
 
     def browse_output_dir(self):
         """浏览输出目录"""
-        dir_path = QFileDialog.getExistingDirectory(self, "选择输出文件夹", "")
+        default = self._get_default_work_dir()
+        if default:
+            default = os.path.join(default, "11_12_13_predictions/Non_Empirical_Prediction")
+        dir_path = QFileDialog.getExistingDirectory(self, "选择输出文件夹", default)
         if dir_path:
             self.output_file.set_path(dir_path)
 

src/gui/panels/step8_75_panel.py

@@ -4,6 +4,8 @@
 Step8_75 面板 - 自定义回归预测
 """
 
+import os
+
 from PyQt5.QtWidgets import (
     QWidget, QVBoxLayout, QGroupBox,
     QPushButton, QCheckBox, QMessageBox, QFileDialog,
@@ -73,15 +75,70 @@ class Step8_75Panel(QWidget):
         layout.addStretch()
         self.setLayout(layout)
 
+    def update_from_config(self, work_dir=None, pipeline=None):
+        """从全局配置自动填充采样光谱和自定义回归模型目录
+
+        Args:
+            work_dir: 工作目录路径
+            pipeline: Pipeline 实例（未使用，保留接口兼容性）
+        """
+        if work_dir:
+            self.work_dir = work_dir
+        elif hasattr(self, 'work_dir') and self.work_dir:
+            pass
+        else:
+            self.work_dir = None
+
+        main_window = self.window()
+
+        # 1. 尝试从 Step7 界面读取全湖采样点 CSV 路径
+        if main_window and hasattr(main_window, 'step7_panel'):
+            step7_output_path = main_window.step7_panel.output_file.get_path()
+            if step7_output_path:
+                existing = self.sampling_csv_file.get_path()
+                if not existing or not existing.strip():
+                    self.sampling_csv_file.set_path(step7_output_path)
+
+        # 2. 尝试从 Step6.75 界面读取自定义回归模型目录
+        if main_window and hasattr(main_window, 'step6_75_panel'):
+            step6_75_models_dir = main_window.step6_75_panel.output_dir.text().strip()
+            if step6_75_models_dir:
+                existing_models = self.regression_models_dir.get_path()
+                if not existing_models or not existing_models.strip():
+                    self.regression_models_dir.set_path(step6_75_models_dir)
+
+        # 3. 自动填充输出目录（自定义回归预测目录）
+        if self.work_dir:
+            output_dir = os.path.join(self.work_dir, "11_12_13_predictions/Custom_Regression_Prediction")
+            os.makedirs(output_dir, exist_ok=True)
+            existing_out = self.output_dir_widget.get_path()
+            if not existing_out or not existing_out.strip():
+                self.output_dir_widget.set_path(output_dir)
+
+    def _get_default_work_dir(self):
+        """获取 work_dir，优先用 panel 自身缓存的，否则尝试从主窗口取"""
+        if hasattr(self, 'work_dir') and self.work_dir:
+            return str(self.work_dir)
+        mw = self.window()
+        if mw and hasattr(mw, 'work_dir') and mw.work_dir:
+            return str(mw.work_dir)
+        return ""
+
     def browse_regression_models_dir(self):
         """浏览回归模型目录"""
-        dir_path = QFileDialog.getExistingDirectory(self, "选择回归模型目录", "")
+        default = self._get_default_work_dir()
+        if default:
+            default = os.path.join(default, "9_Custom_Regression_Modeling")
+        dir_path = QFileDialog.getExistingDirectory(self, "选择回归模型目录", default)
         if dir_path:
             self.regression_models_dir.set_path(dir_path)
 
     def browse_output_dir(self):
         """浏览输出目录"""
-        dir_path = QFileDialog.getExistingDirectory(self, "选择输出目录", "")
+        default = self._get_default_work_dir()
+        if default:
+            default = os.path.join(default, "11_12_13_predictions/Custom_Regression_Prediction")
+        dir_path = QFileDialog.getExistingDirectory(self, "选择输出目录", default)
         if dir_path:
             self.output_dir_widget.set_path(dir_path)
 

src/gui/panels/step8_panel.py

@@ -4,6 +4,9 @@
 Step8 面板 - 机器学习预测
 """
 
+import os
+from pathlib import Path
+
 from PyQt5.QtWidgets import (
     QWidget, QVBoxLayout, QGroupBox, QFormLayout,
     QPushButton, QCheckBox, QComboBox, QLineEdit, QMessageBox,
@@ -76,9 +79,61 @@ class Step8Panel(QWidget):
         layout.addStretch()
         self.setLayout(layout)
 
+    def update_from_config(self, work_dir=None, pipeline=None):
+        """从全局配置自动填充采样光谱和模型目录
+
+        Args:
+            work_dir: 工作目录路径
+            pipeline: Pipeline 实例（未使用，保留接口兼容性）
+        """
+        if work_dir:
+            self.work_dir = work_dir
+        elif hasattr(self, 'work_dir') and self.work_dir:
+            pass
+        else:
+            self.work_dir = None
+
+        main_window = self.window()
+
+        # 1. 尝试从 Step7 界面读取全湖采样点 CSV 路径
+        if main_window and hasattr(main_window, 'step7_panel'):
+            step7_output_path = main_window.step7_panel.output_file.get_path()
+            if step7_output_path:
+                existing = self.sampling_csv_file.get_path()
+                if not existing or not existing.strip():
+                    self.sampling_csv_file.set_path(step7_output_path)
+
+        # 2. 尝试从 Step6 界面读取监督模型目录
+        if main_window and hasattr(main_window, 'step6_panel'):
+            step6_models_dir = main_window.step6_panel.output_dir.get_path()
+            if step6_models_dir:
+                existing_models = self.models_dir_file.get_path()
+                if not existing_models or not existing_models.strip():
+                    self.models_dir_file.set_path(step6_models_dir)
+
+        # 3. 自动填充输出路径（机器学习预测目录）
+        if self.work_dir:
+            output_dir = os.path.join(self.work_dir, "11_12_13_predictions/Machine_Learning_Prediction")
+            os.makedirs(output_dir, exist_ok=True)
+            existing_out = self.output_file.get_path()
+            if not existing_out or not existing_out.strip():
+                self.output_file.set_path(output_dir)
+
+    def _get_default_work_dir(self):
+        """获取 work_dir，优先用 panel 自身缓存的，否则尝试从主窗口取"""
+        if hasattr(self, 'work_dir') and self.work_dir:
+            return str(self.work_dir)
+        mw = self.window()
+        if mw and hasattr(mw, 'work_dir') and mw.work_dir:
+            return str(mw.work_dir)
+        return ""
+
     def browse_models_dir(self):
         """浏览模型目录"""
-        dir_path = QFileDialog.getExistingDirectory(self, "选择模型目录", "")
+        default = self._get_default_work_dir()
+        if default:
+            default = os.path.join(default, "7_Supervised_Model_Training")
+        dir_path = QFileDialog.getExistingDirectory(self, "选择模型目录", default)
         if dir_path:
             self.models_dir_file.set_path(dir_path)
 

src/gui/panels/step9_panel.py

@@ -101,12 +101,9 @@ class Step9Panel(QWidget):
         mode_row = QHBoxLayout()
         self.mode_single_rb = QRadioButton("单个 CSV 文件")
         self.mode_folder_rb = QRadioButton("文件夹批量")
-        self.mode_single_rb.setChecked(True)
         self._mode_group = QButtonGroup(self)
         self._mode_group.addButton(self.mode_single_rb, 0)
         self._mode_group.addButton(self.mode_folder_rb, 1)
-        self.mode_single_rb.toggled.connect(self._on_step9_mode_changed)
-        self.mode_folder_rb.toggled.connect(self._on_step9_mode_changed)
         mode_row.addWidget(self.mode_single_rb)
         mode_row.addWidget(self.mode_folder_rb)
         mode_row.addStretch()
@@ -192,16 +189,36 @@ class Step9Panel(QWidget):
 
         layout.addStretch()
         self.setLayout(layout)
-        self._on_step9_mode_changed()
 
-    def _on_step9_mode_changed(self):
+        # 信号绑定与初始状态
+        self.mode_single_rb.toggled.connect(self._toggle_input_mode)
+        self.mode_folder_rb.toggled.connect(self._toggle_input_mode)
+        self.mode_single_rb.setChecked(True)  # 默认选中"单个 CSV"
+        self._toggle_input_mode()             # 根据默认值设置初始显示状态
+
+    def _toggle_input_mode(self):
+        """槽函数：根据单选框状态动态显示/隐藏对应的输入组件。"""
         folder_mode = self.mode_folder_rb.isChecked()
-        self.prediction_csv_file.setEnabled(not folder_mode)
-        self._folder_row_widget.setEnabled(folder_mode)
-        self.recursive_csv_cb.setEnabled(folder_mode)
+        # 单个 CSV 模式：显示单文件选择，隐藏文件夹选择
+        self.prediction_csv_file.setVisible(not folder_mode)
+        # 文件夹批量模式：显示文件夹选择 + 递归选项，隐藏单文件选择
+        self._folder_row_widget.setVisible(folder_mode)
+        self.recursive_csv_cb.setVisible(folder_mode)
+
+    def _get_default_work_dir(self):
+        """获取 work_dir，优先用 panel 自身缓存的，否则尝试从主窗口取"""
+        if hasattr(self, 'work_dir') and self.work_dir:
+            return str(self.work_dir)
+        mw = self.window()
+        if mw and hasattr(mw, 'work_dir') and mw.work_dir:
+            return str(mw.work_dir)
+        return ""
 
     def browse_prediction_csv_dir(self):
-        d = QFileDialog.getExistingDirectory(self, "选择预测结果 CSV 所在文件夹")
+        default = self._get_default_work_dir()
+        if default:
+            default = os.path.join(default, "11_12_13_predictions")
+        d = QFileDialog.getExistingDirectory(self, "选择预测结果 CSV 所在文件夹", default)
         if d:
             self.prediction_csv_dir_edit.setText(d)
 
@@ -281,9 +298,68 @@ class Step9Panel(QWidget):
             if p.parent and str(p.parent) != '.':
                 self.output_dir.set_path(str(p.parent))
 
+    def update_from_config(self, work_dir=None, pipeline=None):
+        """从全局配置自动填充预测结果目录
+
+        优先使用 Step8（机器学习预测）的输出目录作为待预测 CSV 目录；
+        其次回退到 Step8.5（回归预测）或 Step8.75（自定义回归预测）的输出目录。
+
+        Args:
+            work_dir: 工作目录路径
+            pipeline: Pipeline 实例（未使用，保留接口兼容性）
+        """
+        if work_dir:
+            self.work_dir = work_dir
+        elif hasattr(self, 'work_dir') and self.work_dir:
+            pass
+        else:
+            self.work_dir = None
+
+        main_window = self.window()
+        if not main_window:
+            return
+
+        # 1. 尝试从 Step8 界面读取机器学习预测输出目录（优先）
+        pred_dir = None
+        if hasattr(main_window, 'step8_panel'):
+            step8_output = main_window.step8_panel.output_file.get_path()
+            if step8_output:
+                pred_dir = str(Path(step8_output).parent)
+
+        # 2. 备选：从 Step8.5 界面读取非经验预测输出目录
+        if not pred_dir and hasattr(main_window, 'step8_5_panel'):
+            step8_5_output = main_window.step8_5_panel.output_file.get_path()
+            if step8_5_output:
+                pred_dir = str(Path(step8_5_output).parent)
+
+        # 3. 备选：从 Step8.75 界面读取自定义回归预测输出目录
+        if not pred_dir and hasattr(main_window, 'step8_75_panel'):
+            step8_75_output = main_window.step8_75_panel.output_dir_widget.get_path()
+            if step8_75_output:
+                pred_dir = step8_75_output
+
+        # 自动填入"预测CSV目录"（文件夹批量模式）
+        if pred_dir:
+            existing_dir = (self.prediction_csv_dir_edit.text() or "").strip()
+            if not existing_dir:
+                self.prediction_csv_dir_edit.setText(pred_dir)
+                # 切换到文件夹批量模式
+                self.mode_folder_rb.setChecked(True)
+
+        # 4. 自动填充输出目录（14_visualization）
+        if self.work_dir:
+            output_dir = os.path.join(self.work_dir, "14_visualization")
+            os.makedirs(output_dir, exist_ok=True)
+            existing_out = self.output_dir.get_path()
+            if not existing_out or not existing_out.strip():
+                self.output_dir.set_path(output_dir)
+
     def browse_output_dir(self):
         """浏览输出目录"""
-        dir_path = QFileDialog.getExistingDirectory(self, "选择输出模型目录", "")
+        default = self._get_default_work_dir()
+        if default:
+            default = os.path.join(default, "14_visualization")
+        dir_path = QFileDialog.getExistingDirectory(self, "选择输出分布图目录", default)
         if dir_path:
             self.output_dir.set_path(dir_path)
 

src/gui/panels/visualization_panel.py

@@ -1215,9 +1215,19 @@ class VisualizationPanel(QWidget):
         if work_dir:
             QTimer.singleShot(100, self.scan_work_directory)
 
+    def _get_default_work_dir(self):
+        """获取 work_dir，优先用 panel 自身缓存的，否则尝试从主窗口取"""
+        if hasattr(self, 'work_dir') and self.work_dir:
+            return str(self.work_dir)
+        mw = self.window()
+        if mw and hasattr(mw, 'work_dir') and mw.work_dir:
+            return str(mw.work_dir)
+        return ""
+
     def browse_work_dir(self):
         """浏览工作目录"""
-        dir_path = QFileDialog.getExistingDirectory(self, "选择工作目录")
+        default = self._get_default_work_dir()
+        dir_path = QFileDialog.getExistingDirectory(self, "选择工作目录", default)
         if dir_path:
             self.work_dir = dir_path
             self.work_dir_edit.setText(dir_path)
@@ -1225,7 +1235,8 @@ class VisualizationPanel(QWidget):
 
     def browse_img_dir(self):
         """手动浏览图像目录"""
-        dir_path = QFileDialog.getExistingDirectory(self, "选择图像目录")
+        default = self._get_default_work_dir()
+        dir_path = QFileDialog.getExistingDirectory(self, "选择图像目录", default)
         if dir_path:
             self.img_dir_edit.setText(dir_path)
             self.image_tree.scan_directory(dir_path)