case "0":
		// Confirm existing label (upgrade certainty to 100)
		if m.state.Player != nil {
			m.state.Player.Stop()
		}
		if m.state.ConfirmLabel() {
			if err := m.state.Save(); err != nil {
				m.err = err.Error()
				return m, nil
			}
		}
		if !m.state.NextSegment() {
			m.quitting = true
			return m, tea.Quit
		}
		return m, m.segmentChangeCmd()

	b.WriteString(helpDarkStyle.Render(wrapText("[esc]quit [,]prev [.]next [space]comment [ctrl+s]clip [ctrl+d]bookmark [ctrl+,]prev-bk [ctrl+.]next-bk [enter]play [shift+enter]½speed", wrapWidth)))

	b.WriteString(helpDarkStyle.Render(wrapText("[esc]quit [,]prev [.]next [0]confirm [space]comment [ctrl+s]clip [ctrl+d]bookmark [ctrl+,]prev-bk [ctrl+.]next-bk [enter]play [shift+enter]½speed", wrapWidth)))

	s.Dirty = true
}

// ConfirmLabel upgrades the current segment's existing filter label certainty
// to 100. Returns true if a write is needed (label existed and was below 100).
func (s *ClassifyState) ConfirmLabel() bool {
	seg := s.CurrentSegment()
	if seg == nil {
		return false
	}
	filterLabels := seg.GetFilterLabels(s.Config.Filter)
	if len(filterLabels) == 0 {
		return false
	}
	if filterLabels[0].Certainty == 100 {
		return false
	}
	df := s.CurrentFile()
	if df == nil {
		return false
	}
	df.Meta.Reviewer = s.Config.Reviewer
	filterLabels[0].Certainty = 100

	return true