v0.19.0 — TierList, docs IA & mobile key caps

Added

• TierList component (DS-0159, DS-0160) — labelled tier rows (S / A / B / C / D by
  default, or any { id, label, color? } list) plus an unranked tray, holding one tile per
  item. Tiles move by pointer drag between and within rows (Pointer Events, so touch works;
  live reorder with a ghost under the pointer, commit on release) and by keyboard (Space
  picks up, arrows move — left/right within the row, up/down across rows, Home/End — Space
  drops, Escape cancels) with every step read out by a polite live region, so ranking never
  depends on dragging (WCAG 2.2 SC 2.5.7). Presentational: what a tile shows is your tile
  snippet; the result comes back as placements (tier id → ordered item ids) through
  bind:placements / onchange; onselect activates a tile (Enter / click); readonly shows
  someone else's ranking. Row accents are palette slots (accent, cyan, yellow, muted, red, …)
  as Badge-style washes — no colour literals; sizes read the new --ss-tier-* tokens
  (src/styles/components/_tierlist.scss). No runtime dependency: the pure model, move maths
  and wording live in tierlist-core.ts, shared with the plain-HTML behaviour
  (dssoca/vanilla.js now drives the rendered markup: same drag + keyboard paths, emits
  ss:change with { placements }, data-ss-readonly makes it inert). Ported from the
  passoca roulette tierlist minus its app logic (posters, autosave, publish, export).
• Inspirations gallery inside the docs (DS-0158). /inspirations on the docs site lists
  every example website — same cards, blurbs, component chips and thumbnails as the GitHub Pages
  gallery — inside the docs layout and axes; each card opens its site on the Pages host in a new
  tab. The nav entry is internal now (Explore group) and search routes to it. One source of
  truth: inspirations/manifest.json feeds both galleries (the Pages gallery's cards are rendered
  into index.html at build time from it — adding a site is a folder + a manifest entry),
  drift-guarded by the root and docs test suites. Thumbnails are hot-linked from the Pages host
  with the striped placeholder as fallback.
• Card external prop (DS-0158) — with href, the overlay link opens in a new tab
  (target="_blank", rel="noopener noreferrer") and announces "(opens in a new tab)", matching
  Sidebar's external.
• Icon search glyph (DS-0157) — a magnifier, used by Topbar's command button on touch
  devices (below) and available to consumers like every other built-in.

Changed

• Inspirations gallery cards: head laid out as two rows (DS-0158) — title with the ↗ at its
  end, then the kind on its own line — on both the Pages gallery and the docs gallery.
• Kbd hides itself on keyboard-less devices — hideOnMobile prop, default true
  (DS-0157; behaviour change). Key-cap chips are noise where the only input is a finger, so
  on @media (hover: none) and (pointer: coarse) viewports (phones, tablets) the chip is now
  display: none — a capability query, not a width, so a narrow desktop window keeps its hints.
  Pass hideOnMobile={false} where the chip is the content rather than a hint; it then renders
  data-hide-on-mobile="false" on the root, which is also the plain-HTML opt-out (bare
  <kbd class="ss-kbd"> markup gets the new default with no changes). ShortcutsHelp opts its
  rows out; Topbar's command button swaps the hidden ⌘K chip for a decorative search glyph on
  those devices so the tap target never renders empty. Audit your own "Enter to send"-style
  sentences: the chip hides, the words around it are yours to hide. The Inspirations sites do
  exactly that.
• Docs sidebar — grouped guide pages (DS-0156). The flat run of nine links above the
  component list is now three labelled groups: Getting started (Introduction, Installation,
  Plain HTML & CSS), Configuration (Theming & config, Tokens, Theme Builder, Keyboard) and
  Explore (Inspirations, Color theory, All components). No page moved URL; NAV groups
  carry a stable section key plus a rendered label, and the search palette hints each
  page with its group. Membership is pinned by the docs tests.

Fixed

• Inspirations thumbnails on GitHub Pages (hotfix after 0.18.0) — the screenshot script
  ran the Playwright CLI synchronously from the same process that serves the built site, so
  the browser's first request was never answered and the Pages run hung; the capture is
  asynchronous now, with a hard timeout, and the suite pins it.

Full changelog: v0.18.0...v0.19.0