Filter Date Chip

The component is self-contained: one file, zero dependencies, its own palette in local variables --vibeui-calendar-029-*. Client-side: the value, the panel's openness and the month on show live in useState. The panel is positioned absolutely against the [data-part="anchor"] wrapper with position:relative, so it needs neither a portal nor coordinate maths. The chip button carries aria-expanded and aria-controls, Escape is caught by a handler on the root and closes the panel, and picking a day closes it as well. The clear button is placed beside the chip rather than nested inside it: an interactive element inside a button is invalid markup, broken for both the keyboard and a screen reader. The grid is built on 42 cells from Monday, and days of neighbouring months are marked data-outside. The theme comes from the surrounding color-scheme through light-dark(): the filter row has no surface of its own by default, it sits directly on the page background and darkens along with it, while the background prop brings the panel back. The panel itself has a surface of its own — --vibeui-calendar-029-panel: a popover has to be opaque, otherwise the month grid lands on the text beneath it. The captions of the clear and paging buttons arrive in props, the Russian values sit in the defaults.