New parts `<Combobox.SelectedTags>`, `<Combobox.SelectedTag>` and
`<Combobox.SelectedTagRemove>` render the current selection as
removable chips inside `<Combobox.Control>` when `type='multiple'`
(Material UI Autocomplete pattern):
- Morfo: 3 new public parts with kebab names + texts entries.
- Langs: es/en entries `selected-tags` / `selected-tag-remove`.
- Soma: `ComboboxSelectedTagsProvider` exposes `items` derived from
the provider's label registry; `ComboboxSelectedTagProvider`
surfaces `data-value` / `data-label`; `ComboboxSelectedTagRemoveProvider`
resolves its parent tag via context and calls `provider.removeValue`
on click. Provider gains `getSelectedItems()` and `removeValue()`
helpers; `selectedTagsEmpty` runtime prop drives `[data-empty]`.
- Soma item registry: stop unregistering labels on Item cleanup so
chips keep proper labels after the listbox closes/lazy-unmounts.
- Eidos: default snippet loops items and renders a chip + X icon
per entry; consumer can override the snippet for custom rendering.
- CSS: chip styling, wrap-friendly Control with breathing padding
when chips are present, ClearButton pinned right via auto margin,
input flex basis reduced to 4rem so it shares a row with chips.
- Demo: renders `<Combobox.SelectedTags />` inside Control when
`mode === 'multiple'`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>