Build on top of v1.8.3-alpha.52. Bandeau redesign per ReikanYsora's screenshot:
- Mushroom-card style with 8 px margin, --ha-card-background + --divider-color border.
- Grid layout (auto / 1fr / auto) keeps weather chip left, date centre, close button right.
- Calendar glyph added before the date, plus an HA-frontend-style pill chip ('Aujourd'hui' / 'Hier' / etc.) styled like the Now chip from the screenshot (color-mix 18 % primary background, primary text, rounded 14 px).
- Weather chip icon properly centred (line-height: 0 fix).
- Close button moved from absolute overlay to flex child of the bandeau.
- Hover text-grow dropped per spec.