Housing Decor Guide

### Added
- Recipes tab: new expansion-filter dropdown above the profession list. Lists
  only expansions that have recipes in the DB, tinted with the expansion's
  canonical colour. Selection persists across /reload.
- Recipes tab: new "Known" toggle button added between "All" and "Ready",
  restricting the list to recipes the current character has already learned.
  Tri-state exclusive with "All" / "Ready"; selection persists across /reload.
  Big thanks to Jack for prototyping both filters in a community fork —
  these features are ported from his work.

### Fixed
- Lumber tracker in Recipes tab: "In Stock" column sometimes rendered the
  "have/needed" form instead of the collapsed single-count form on first
  window open, even for lumber types whose decor was fully collected. Root
  cause: the lumber tracker's HDG_COLLECTION_READY handler only refreshed
  the pinned widget, not the embedded in-window tracker. Switching tabs
  away and back masked the issue (RefreshLumberTracking fires on show).
  Fix: also call HDG_UI.RefreshLumberTracking() when the collection cache
  warms, so the embedded tracker re-renders with fresh collection state.