fix: 若干改进

src/heurams/interface/__main__.py

@@ -1,5 +1,3 @@
-from heurams.context import rootdir, workdir, config_var
-
 from textual.app import App
 from textual.widgets import Button
 from .screens.dashboard import DashboardScreen
@@ -48,6 +46,7 @@ def is_subdir(parent, child):
         return 0
 
 # 开发模式
+from heurams.context import rootdir, workdir, config_var
 from pathlib import Path
 from heurams.context import rootdir
 import os