I can't have access to a code that l mistakely deleted on my editer on phone since there is no undo or redo features. Redo and Undo features should be added at the bottom of editer to save us

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No files, tests, or entry points are named. Start by locating the mobile editor implementation and its text-editing state, then clarify the intended placement and behavior of undo and redo controls. Done means the requested controls work for accidental edits and are covered by appropriate tests.

Written by the indexing model from the issue text.