// Goto dialog state
	gotoMode  bool   // true when goto mode is active
	gotoInput string // current number input

	}
	// If in goto mode, route to goto handler
	if m.gotoMode {
		return m.handleGotoKey(msg)

	// Check for Ctrl+G (goto file dialog)
	if msg.String() == "ctrl+g" {
		m.gotoInput = ""
		m.gotoMode = true
		return m, nil
	}

		}
		return m, nil
	}
	return m, nil
}
// handleGotoKey handles key presses in goto mode
func (m Model) handleGotoKey(msg tea.KeyPressMsg) (tea.Model, tea.Cmd) {
	key := msg.Key()
	// Enter: execute goto
	if key.Code == tea.KeyEnter {
		if m.gotoInput == "" {
			m.gotoMode = false
			return m, nil
		}
		fileNum := 0
		for _, ch := range m.gotoInput {
			if ch >= '0' && ch <= '9' {
				fileNum = fileNum*10 + int(ch-'0')
			}
		}
		if m.state.GotoFile(fileNum) {
			if m.state.Player != nil {
				m.state.Player.Stop()
			}
			m.gotoMode = false
			return m, m.segmentChangeCmd()

		m.err = fmt.Sprintf("Invalid file number: %s", m.gotoInput)
		m.gotoMode = false
		return m, nil
	}
	// Escape: cancel
	if key.Code == tea.KeyEscape || key.Code == tea.KeyEsc {
		m.gotoMode = false

	// Backspace: remove last digit
	if key.Code == tea.KeyBackspace {
		if len(m.gotoInput) > 0 {
			m.gotoInput = m.gotoInput[:len(m.gotoInput)-1]
		}
		return m, nil
	}
	// Digits: append to input
	s := msg.String()
	if len(s) == 1 && s[0] >= '0' && s[0] <= '9' {
		// Limit to reasonable number of digits (9 digits = 999,999,999 files)
		if len(m.gotoInput) < 9 {
			m.gotoInput += s
		}
		return m, nil
	}

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

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

	// Goto dialog (when active)
	if m.gotoMode {
		m.renderGotoDialog(&b)
		return tea.NewView(b.String())
	}

// renderGotoDialog renders the goto file input dialog
func (m Model) renderGotoDialog(b *strings.Builder) {
	inputLine := m.gotoInput + "█"
	totalFiles := m.state.TotalFiles()
	helpLine := "[enter]go  [esc]cancel"

	// Render box
	content := fmt.Sprintf("Go to file:\n%s/%d\n%s", inputLine, totalFiles, helpLine)
	b.WriteString(commentBoxStyle.Render(content))
}

}
// TotalFiles returns the total number of data files
func (s *ClassifyState) TotalFiles() int {
	return len(s.DataFiles)
}
// GotoFile jumps to a specific file number (1-based), returns false if invalid
func (s *ClassifyState) GotoFile(fileNum int) bool {
	idx := fileNum - 1
	if idx < 0 || idx >= len(s.DataFiles) {
		return false
	}
	s.FileIdx = idx
	s.SegmentIdx = 0
	return true

## [2026-03-29] Goto file feature for `calls classify` TUI
Added `ctrl+g` keybinding to jump directly to any file by number. The dialog accepts
a file number (1-based) and jumps to the first segment of that file.
**Keybinding:** `ctrl+g` → type number → `enter` to jump, `esc` to cancel
**Changes:**
- `tools/calls_classify.go` — Added `TotalFiles()` and `GotoFile()` methods to `ClassifyState`
- `tui/classify.go` — Added `gotoMode` and `gotoInput` state; `ctrl+g` keybinding;
  `handleGotoKey()` for digit/backspace/enter/esc handling; `renderGotoDialog()` for UI display