新建&修改弹窗，有前端页面缓存

以新建为例，点击新建并打开弹窗后，应该显示一个全新的所有值为空的弹窗，但实际上弹窗内仍保留了上次新建时留下的值。

修改也有类似的问题。

Reproduce the create and edit modal behavior, then trace the frontend form state used when each modal opens. Done means a new-create modal starts with all values empty, while an edit modal shows only the selected item's values rather than values retained from an earlier operation.

Written by the indexing model from the issue text.