Gate search behind CompanySettings.searchEnabled; fix two reported bugs

Search icon now gated behind the new backend toggle, same pattern as
wishlistEnabled — off by default.

Fixed: blog category filter bar was invisible — it was wrapped in
<Reveal>, which sits right at/just past the hero's bottom edge, the
exact "already near the initial viewport" position Reveal.tsx's own
comment documents as a whileInView(margin:"-80px") trap (an element
already visible without scrolling can permanently never register as
"entered view", since `once: true` never gets a second chance). Now a
plain div, no scroll-reveal animation needed for a filter bar anyway.

Fixed: wishlist count showing one behind on the Navbar badge —
useWishlist.ts's toggle() broadcast the "refetch me" event immediately
after the optimistic local update, before the POST request was even
sent. Another instance's resulting refetch could race the actual
server-side write, get the pre-toggle list, and then never get told to
refetch again. Broadcast now only fires after the request settles.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/components/Navbar.tsx

@@ -246,7 +246,15 @@ function CartLink() {
   );
 }
 
-export function Navbar({ singleActiveProduct, wishlistEnabled }: { singleActiveProduct: boolean; wishlistEnabled: boolean }) {
+export function Navbar({
+  singleActiveProduct,
+  wishlistEnabled,
+  searchEnabled,
+}: {
+  singleActiveProduct: boolean;
+  wishlistEnabled: boolean;
+  searchEnabled: boolean;
+}) {
   const pathname = usePathname();
   const [scrolled, setScrolled] = useState(false);
   const [activeSection, setActiveSection] = useState("");
@@ -545,7 +553,7 @@ export function Navbar({ singleActiveProduct, wishlistEnabled }: { singleActiveP
                 built-in padding read as too much space on mobile, where
                 these two icons are the only always-visible controls. */}
             <div className="flex items-center">
-              <SearchButton />
+              {searchEnabled && <SearchButton />}
               <AccountLink />
               {wishlistEnabled && <WishlistLink />}
               <CartLink />