fix(ui): MainWindow.__init__ 添加 config=None 参数

src/ui/main_window.py

@@ -279,8 +279,9 @@ class SettingsView(QWidget):
 class MainWindow(QMainWindow):
     """Main application window."""
     
-    def __init__(self):
+    def __init__(self, config=None):
         super().__init__()
+        self.config = config or {}
         self.setWindowTitle("WeChat Agent")
         self.setMinimumSize(1200, 800)
         self.setup_ui()