feat(deeplink): jump from banner/rank list to the exact post in All Materials

- FigmaBanner: route same-app linkUrl through SPA navigation so the stream's
  scroll-to-post runs without a full reload; defer pointer capture until a real
  drag starts, fixing plain clicks being swallowed by setPointerCapture
- PopularRankList: rank rows navigate straight to /browse?sort=popular&post=<id>
- MessageStream: ?post= deep links jump directly to the target instead of
  resetting to the top and animating through the stream
- ScrollToTop: skip the top-reset for ?post= navigations so the target page
  handles its own alignment

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/PopularRankList.tsx

@@ -119,7 +119,9 @@ function PopularRankRow({
     <article className="relative flex items-center gap-3 rounded-2xl border border-ark-line bg-ark-panel p-3 transition hover:border-ark-gold/45 md:gap-4 md:p-4">
       <button
         type="button"
-        onClick={() => navigate(`/resource/${post.id}`)}
+        onClick={() =>
+          navigate(`/browse?sort=popular&post=${encodeURIComponent(post.id)}`)
+        }
         aria-label={r.title}
         className="absolute inset-0 z-0 rounded-2xl outline-none focus-visible:ring-2 focus-visible:ring-ark-gold/70"
       />