Step4 心跳刷新 + Step10 输出目录更名与智能寻址优化

src/gui/panels/step4_sampling_panel.py

@@ -6,6 +6,7 @@ Step4 面板 - 采样点布设
 
 import os
 
+from PyQt5.QtCore import QTimer
 from PyQt5.QtWidgets import (
     QWidget, QVBoxLayout, QGroupBox, QFormLayout,
     QPushButton, QCheckBox, QSpinBox, QMessageBox,
@@ -94,6 +95,11 @@ class Step4SamplingPanel(QWidget):
         layout.addStretch()
         self.setLayout(layout)
 
+        # 添加心跳定时器，每2秒自动检查一次输出文件状态，刷新预览按钮
+        self._status_timer = QTimer(self)
+        self._status_timer.timeout.connect(self._check_csv_exists)
+        self._status_timer.start(2000)
+
         # 监听输出路径变化，实时更新预览按钮状态
         self.output_file.line_edit.textChanged.connect(self._on_output_changed)