fix: restore portfolio loader and safe consent revocation

app/components/GoogleAnalytics.tsx

@@ -98,6 +98,7 @@ const buttonClassName =
 function GoogleAnalyticsConsent() {
   const [consent, setConsent] = useState<AnalyticsConsent | null>();
   const [preferencesOpen, setPreferencesOpen] = useState(false);
+  const [revokeError, setRevokeError] = useState<string | null>(null);
   const configuredRef = useRef(false);
   const preferencesButtonRef = useRef<HTMLButtonElement>(null);
 
@@ -150,7 +151,13 @@ function GoogleAnalyticsConsent() {
   }
 
   function revokeAnalytics() {
-    persistConsent("denied");
+    if (!persistConsent("denied")) {
+      setRevokeError(
+        "Não foi possível salvar a revogação. Tente novamente para concluir.",
+      );
+      return;
+    }
+    setRevokeError(null);
     window[GA_DISABLE_KEY] = true;
     window.gtag?.("consent", "update", deniedConsent);
     expireAnalyticsCookies();
@@ -250,6 +257,15 @@ function GoogleAnalyticsConsent() {
             Analytics está {consent === "granted" ? "ativo" : "desativado"}.
             Dados de publicidade permanecem negados.
           </p>
+          {revokeError && (
+            <p
+              role="alert"
+              aria-label="Falha ao salvar a revogação"
+              className="mt-sp-3 text-[13px] leading-6 text-[var(--slash)]"
+            >
+              {revokeError}
+            </p>
+          )}
           <div className="mt-sp-4 flex flex-wrap gap-sp-2">
             {consent === "granted" ? (
               <button