Fix cart-badge false pulse, blog hero-card misattribution, legal breadcrumb color

- Cart badge pulsed on every page load/reload, not just real cart
  changes — useCartCount's SSR snapshot is always 0, so hydration alone
  satisfied the "count increased" check. Skip the very first effect run.
- WishlistButton: touch-device smaller/subtler sizing now applies
  regardless of revealOnHover (e.g. the homepage spotlight heart), not
  just the shop grid's hover-reveal mode.
- /blog: the big featured-style hero card was applied to whatever post
  sorted first post-filter, even when that post isn't actually the
  `featured` one (a category filter can exclude the real featured post
  entirely). Now gated on the post's own `featured` flag.
- Legal pages' "Startseite" breadcrumb link now matches the same
  text-brand/hover:underline treatment already used elsewhere on these
  pages (e.g. Impressum's Anbieter email link), instead of staying muted
  until hover.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018unaXmuzVA8ct1b6WoyP1U

app/components/Navbar.tsx

@@ -177,6 +177,12 @@ function CartLink() {
   const anchorRef = useRef<HTMLAnchorElement>(null);
   const [pulse, setPulse] = useState(false);
   const prevVisibleRef = useRef(0);
+  // useCartCount's getServerSnapshot is always 0 (see cart.ts) so hydration
+  // always transitions 0 -> the real count on first render — without this
+  // guard that transition alone satisfied "visibleCount > prevVisibleRef"
+  // and pulsed the badge on every single page load/reload, not just an
+  // actual in-session cart change.
+  const hasMountedRef = useRef(false);
   const pathname = usePathname();
 
   // Held back by pendingCount while a ball is mid-flight, so the badge only
@@ -191,6 +197,11 @@ function CartLink() {
   }, [registerCartIcon]);
 
   useEffect(() => {
+    if (!hasMountedRef.current) {
+      hasMountedRef.current = true;
+      prevVisibleRef.current = visibleCount;
+      return;
+    }
     if (visibleCount > prevVisibleRef.current) {
       setPulse(true);
       const t = setTimeout(() => setPulse(false), 350);