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Add Auto checkboxes (checked by default) next to WPM and Tone inputs. Auto Tone uses a multi-bin Goertzel scan across 300-1200 Hz with stability tracking. Auto WPM collects on-durations in a rolling buffer and uses k-means-style clustering to separate dits from dahs. Unchecking Auto allows manual control. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>