PR #162 (improvise-xg1z) made render.rs paint edit_seed when Editing
arrived without its edit buffer, but commit and append-char still read
the absent buffer as the empty string. So the overlay showed the value,
Enter composed ClearCell, and a typed character replaced the text
instead of extending it: two derivations of what is in the editor.
The fold now seeds the missing buffer (ClientState::settle_editor, next
to settle_mode), and render.rs reads the buffer through read_buffer, as
commit does. edit_seed goes back to pub(crate) and no renderer calls it.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze
Edward Langley
bdf9bff472