fix: improve thread handling and cleanup

temp_file_trans_client/main.py

@@ -1,4 +1,5 @@
 import sys
+import os
 from PySide6.QtWidgets import QApplication, QMessageBox, QMainWindow
 from PySide6.QtCore import QThread, Signal
 from ui import UiCreator
@@ -51,7 +52,7 @@ class MainWindow:
     
     def on_file_selected(self, filepath):
         self.selected_file = filepath
-        filename = filepath.split('/')[-1] if '/' in filepath else filepath.split('\\')[-1]
+        filename = os.path.basename(filepath)
         self.window.drop_label.setText(f"已选择: {filename}")
         self.window.status_label.setText(f"状态: 已选择文件: {filename}")
     
@@ -60,14 +61,18 @@ class MainWindow:
             self.window.status_label.setText("状态: 请先选择文件")
             return
 
+        if self.upload_thread is not None and self.upload_thread.isRunning():
+            self.window.status_label.setText("状态: 上传进行中，请等待")
+            return
+
         expiry = self.window.expiry_combo.currentText()
         self.window.progress_bar.setVisible(True)
-        self.window.progress_bar.setValue(30)
         self.window.upload_btn.setEnabled(False)
         self.window.status_label.setText("状态: 上传中...")
 
         self.upload_thread = UploadThread(self.selected_file, expiry, self.server_url)
         self.upload_thread.finished.connect(self.on_upload_success)
+        self.upload_thread.finished.connect(self.upload_thread.deleteLater)
         self.upload_thread.error.connect(self.on_upload_error)
         self.upload_thread.progress.connect(self.window.progress_bar.setValue)
         self.upload_thread.start()