Give the shell one header, a skip link, and a cookie-aware first paint.

Breakpoint clones were still in the tab order, marketing always painted Log in, and at 430px the logo overlay covered Use cases and Learn.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/components/asset/Logo/Logo.tsx

@@ -95,7 +95,7 @@ const Logo = memo<LogoProps>(
     const wordmarkVisibilityClass =
       size === "topNavFolderTop" || size === "topNavHeader"
         ? wordmark
-          ? "hidden sm:block"
+          ? "hidden md:block"
           : "hidden"
         : wordmark
           ? ""