feat: implement i18n for product and category, add 5 new locales

apps/spa/src/pages/SearchPage.tsx

@@ -126,10 +126,10 @@ export default function SearchPage() {
               {categories.map((cat) => (
                 <Link
                   key={cat.id}
-                  to={`/search?q=${encodeURIComponent(cat.name)}`}
+                  to={`/search?q=${encodeURIComponent(typeof cat.name === 'string' ? cat.name : (cat.name as any)?.[i18n.language] || (cat.name as any)?.en || '')}`}
                   className="bg-white border border-spa-stone/20 px-4 py-1.5 rounded-full text-xs font-medium text-spa-stone hover:border-spa-forest hover:text-spa-forest shadow-sm transition-all duration-300"
                 >
-                  {cat.name}
+                  {typeof cat.name === 'string' ? cat.name : (cat.name as any)?.[i18n.language] || (cat.name as any)?.en || ''}
                 </Link>
               ))}
             </div>