Method installTurnContext

internal/tui/model.go:620–625

installTurnContext cancels any in-flight turn context and installs a fresh per-turn root on m.turnCtx / m.cancel. Cancel-old-then-install-new keeps Ctrl+C consistent: one m.cancel() always unwinds the whole current cascade.

()

	ch := m.cli.Chat(m.turnCtx, msgs, m.buildTools())
	m.stream = ch
	return readEvent(ch)
}

// installTurnContext cancels any in-flight turn context and installs a fresh
// per-turn root on m.turnCtx / m.cancel. Cancel-old-then-install-new keeps
// Ctrl+C consistent: one m.cancel() always unwinds the whole current cascade.
func (m *Model) installTurnContext() {
	if m.cancel != nil {
		m.cancel()