优化

app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt

@@ -92,7 +92,7 @@ class BookSourceEditActivity :
     }
 
     override fun onMenuOpened(featureId: Int, menu: Menu): Boolean {
-        menu.findItem(R.id.menu_login)?.isVisible = !viewModel.bookSource?.loginUrl.isNullOrBlank()
+        menu.findItem(R.id.menu_login)?.isVisible = !getSource().loginUrl.isNullOrBlank()
         menu.findItem(R.id.menu_auto_complete)?.isChecked = viewModel.autoComplete
         return super.onMenuOpened(featureId, menu)
     }