Struct runnerFlags

internal/spawner/spawner_test.go:482–484

runnerFlags bundles per-backend "was called" flags so routing tests can assert on which backend SpawnTab dispatched to without an awkward multi-return-value tuple.

// can assert on which backend SpawnTab dispatched to without an
// awkward multi-return-value tuple.
type runnerFlags struct {
	iterm, terminal, zellij, kitty, warp, ghostty *bool
}

// stubAllRunners replaces every backend's Runner (plus warp's
// OpenURL/WriteScript and kitty's RunnerOutput) with no-op stubs that