Favorites are now merged between local list and the remote service and
stored in di-tui's config fle. If no local favorites are configured the
behavior is unchanged; once the user interacts, the config becomes the
source of truth for ordering and visibility.
Merge rules:
- Local entries appear first, sorted by the user's preference
- Hidden local entries suppress matching remote entries
- Remote favorites with no local entry are appended to the end, in order
Reorder saves are debounced 200ms so rapid key presses produce a single
config write. Toggling a favorite saves immediately.
