💄 style(pricing): 注释掉注册按钮文本

- 临时隐藏注册按钮文字，保留按钮元素结构

src/client/home/pages/PricingPage.tsx

@@ -63,7 +63,7 @@ export default function PricingPage() {
                 onClick={() => navigate('/register')}
                 className="bg-blue-600 text-white px-4 py-2 rounded-lg hover:bg-blue-700 transition-colors font-medium"
               >
-                注册
+                {/* 注册 */}
               </button>
             </nav>
           </div>