修复偏移问题，修复代理问题

app/utils/tasks.py

@@ -17,6 +17,13 @@ huey_db_path = os.path.join(instance_dir, 'huey_queue.db')
 
 huey = SqliteHuey(filename=huey_db_path)
 
+def get_gcode_dir(app):
+    with app.app_context():
+        conf = SystemConfig.query.filter_by(key='gcode_upload_folder').first()
+        if conf and conf.value and os.path.exists(conf.value):
+            return conf.value
+    return app.config['UPLOAD_FOLDER']
+
 
 @huey.task()
 def slice_stl_task(file_id, stl_filepath, quality_preset=None, infill_density=None, support_enable=None, support_pattern=None, delete_stl=False):
@@ -31,7 +38,7 @@ def slice_stl_task(file_id, stl_filepath, quality_preset=None, infill_density=No
 
         # Cache variables and commit slicing status
         gcode_filename = print_file.filename.rsplit('.', 1)[0] + '.gcode'
-        gcode_filepath = os.path.join(app.config['UPLOAD_FOLDER'], gcode_filename)
+        gcode_filepath = os.path.join(get_gcode_dir(app), gcode_filename)
         print_file.status = 'slicing'
         db.session.commit()