Save status

hi please add save state
For example, a text is written on a page and we go to the next page and return to the previous page , text must exist !

No file or test is identified. Start by locating the split-view and drawer-navigation example entry points, then trace how page changes are handled. Done means text entered on one page remains when navigating away and returning, with a focused test or reproducible check if the project provides one.

索引モデルが issue の本文から書いたものです。