Checkbox Multiselect

The component is self-contained: one file, no dependencies, its own palette in the local --vibeui-autocomplete-014-* variables. The selection is kept as an array of strings and the list order never changes — picks do not float to the top, so the eye does not lose its place. A row is a real label with an input[type=checkbox]: keyboard, state and the screen-reader announcement come from the browser rather than being imitated with roles. The whole row is the target rather than the tick itself: a 15px box is next to impossible to hit with a finger. The cursor is driven by the arrows and toggled by Enter — space is taken by typing in the search field. The selection counter is marked role="status", so the change is read aloud. The footer layout is computed from the panel's own width through a container query. The theme comes from color-scheme through light-dark(), and the component switches on a class-based dark theme for itself.