In Ink (App.tsx v7.0.4, 40b3a75) the isFocusEnabled guard lives ONLY in
handleTabNavigation, not in focusNext/focusPrevious. So after disableFocus()
pressing Tab/Shift-Tab is a no-op, but a programmatic
useFocusManager().focusNext()/focusPrevious() still moves focus.
vue-tui previously short-circuited focusNext/focusPrevious on the internal
`enabled` flag, making the programmatic API a no-op while focus was disabled —
divergent from Ink. Move the enabled-check out of focusNext/focusPrevious and
into the Tab/Shift-Tab input listener (mirroring handleTabNavigation), keeping
the focusables.length === 0 short-circuit so focusing an empty/unmounted tree
stays a harmless no-op. The now-redundant local `enabled` is dropped in favor of
ctx.enabled as the single source of truth.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Yunfei He
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