feat(library): add vocation filter, normalize categories, improve grid layout

Added vocation state and included it in query string builder, updated onFilter to accept a vocation parameter, improved grid layout with grid flow classes, normalized category names for consistent item icons, and refined stats mapping to handle type safety.

components/Header.tsx

@@ -20,6 +20,7 @@ export default function Header() {
   const locale = useLocale();
 
   const links = [
+    { href: `/${locale}/library`, label: "Library" },
     { href: `/${locale}/market`, label: t("market") },
     { href: `/${locale}/sobre`, label: t("about") },
     { href: `/${locale}/precos`, label: t("prices") },