Trim whitespace from input paths in config setup

Removed leading and trailing whitespace from user input paths to prevent potential errors caused by unintended spaces.

bd_to_avp/gui/main_window.py

@@ -459,11 +459,11 @@ def save_config(self) -> None:
             config.source_path = None
         else:
             config.source_folder_path = (
-                Path(self.source_folder_widget.text()) if self.source_folder_widget.text() else None
+                Path(self.source_folder_widget.text().strip()) if self.source_folder_widget.text() else None
             )
-            config.source_path = Path(self.source_file_widget.text()) if self.source_file_widget.text() else None
+            config.source_path = Path(self.source_file_widget.text().strip()) if self.source_file_widget.text() else None
 
-        config.output_root_path = Path(self.output_folder_widget.text())
+        config.output_root_path = Path(self.output_folder_widget.text().strip())
         config.audio_bitrate = self.audio_bitrate_spinbox.value()
         config.mv_hevc_quality = self.mv_hevc_quality_spinbox.value()
         config.fov = self.fov_spinbox.value()