Website: Wheel of the Year seasonal themes with auto-midnight updates

Colour themes now follow the Wheel of the Year. Eight seasonal themes map to the eight sabbats, replacing the previous four-theme rotation. Seasonal themes (new "Wheel of the Year" category): | Sabbat | Dates | Theme | Colour | |--------|-------|-------|--------| | Samhain | Oct 31 – Nov 1 | Ocean | deep blue | | Yule | Dec 20–23 | Slate | dark cold grey | | Imbolc | Feb 1–2 | Frost | pale ice-blue | | Ostara | Mar 19–21 | Sage | green | | Beltane | Apr 30 – May 1 | Ember | fire-red | | Litha | Jun 20–22 | Amber | bright gold | | Lughnasadh | Aug 1–2 | Copper | harvest orange | | Mabon | Sep 21–24 | Rust | earthy brown-red | Between-sabbat periods use the season in force — no jarring jumps mid-cycle. Auto-midnight updates: If a user leaves the page open at midnight and the date has crossed into a new sabbat or period, the theme updates automatically (every 60s check). Tick stops the moment they pick an explicit theme. website bumped: 11.11.1 → 11.12.0 Part of the @ewanc26/pkgs monorepo.