fix: fall back to Facebook-only when ad account can't use the page's Instagram

Meta rejects the whole ad creative with error 200/1815199 when the ad
account isn't authorized (in Business Manager) to use the Instagram
account linked to the chosen page. Picking a different page in the new
selector doesn't help if that page's IG is also unshared. Now, when the
creative fails for that specific reason, we retry without
instagram_actor_id so the ad still publishes on Facebook, and the modal
explains why Instagram was dropped and how to enable it.

createFullCampaign gets the same fallback for free.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/components/dashboard/AddAdModal.tsx

@@ -80,6 +80,7 @@ export function AddAdModal({
   const [publishing, setPublishing] = useState(false);
   const [error, setError] = useState<FriendlyError | string | null>(null);
   const [done, setDone] = useState(false);
+  const [instagramDropped, setInstagramDropped] = useState(false);
 
   useEffect(() => {
     let cancelled = false;
@@ -271,6 +272,7 @@ export function AddAdModal({
         return;
       }
 
+      setInstagramDropped(Boolean(data.data?.instagram_dropped));
       setDone(true);
       onCreated();
     } catch (err) {
@@ -301,6 +303,13 @@ export function AddAdModal({
             <p className="text-xs" style={{ color: 'var(--muted-fg)' }}>
               Ele foi criado como Pausado — ative-o no Ads Manager (ou na tabela) quando estiver pronto.
             </p>
+            {instagramDropped && (
+              <div className="text-[11px] mt-1 px-3 py-2 rounded-lg text-left" style={{ background: 'rgba(234,179,8,0.08)', border: '1px solid rgba(234,179,8,0.2)', color: '#fcd34d' }}>
+                ⚠️ Publicamos <strong>só no Facebook</strong>: a conta de anúncios ainda não tem permissão pra usar
+                {selectedInstagramAccount ? <> a conta <strong>@{selectedInstagramAccount.username}</strong></> : ' a conta do Instagram'} desta página.
+                Para ativar o Instagram, vincule a conta no Business Manager (Configurações do Negócio → Contas do Instagram → Atribuir conta de anúncios) e republique.
+              </div>
+            )}
             <button onClick={onClose} className="btn-primary mt-2">Fechar</button>
           </div>
         ) : (

src/lib/mcp/tools.ts

@@ -608,12 +608,16 @@ export async function addAdToAdSet(client: Client, params: AddAdToAdSetParams) {
   // the most broadly compatible across placements.
   const primaryImageHash = imageHashes[0];
 
-  let creative;
+  // Monta o criativo com (ou sem) o Instagram. Quando a conta de anúncios não
+  // tem permissão pra usar a conta de IG vinculada à página, a Meta recusa o
+  // criativo inteiro (erro 200 / subcode 1815199). Nesse caso refazemos o
+  // criativo só com o Facebook, em vez de barrar a publicação.
+  const buildCreative = (instagramActorId?: string) => {
     if (params.is_whatsapp) {
-    creative = await createWhatsappAdCreative(client, {
+      return createWhatsappAdCreative(client, {
         name: creativeName,
         page_id: params.page_id,
-      instagram_actor_id: params.instagram_actor_id,
+        instagram_actor_id: instagramActorId,
         image_hash: primaryImageHash,
         message: params.primary_text,
         headline: params.headline,
@@ -623,11 +627,11 @@ export async function addAdToAdSet(client: Client, params: AddAdToAdSetParams) {
         whatsapp_phone_number: params.whatsapp_phone_number,
         ad_account_id: params.ad_account_id,
       });
-  } else {
+    }
-    creative = await createAdCreative(client, {
+    return createAdCreative(client, {
       name: creativeName,
       page_id: params.page_id,
-      instagram_actor_id: params.instagram_actor_id,
+      instagram_actor_id: instagramActorId,
       image_hash: primaryImageHash,
       link: params.link,
       message: params.primary_text,
@@ -636,6 +640,23 @@ export async function addAdToAdSet(client: Client, params: AddAdToAdSetParams) {
       call_to_action_type: params.cta,
       ad_account_id: params.ad_account_id,
     });
+  };
+
+  // 1815199: "A conta de anúncios não tem acesso a esta conta do Instagram".
+  const isInstagramPermissionError = (err: unknown) =>
+    err instanceof Error && /1815199/.test(err.message);
+
+  let creative;
+  let instagramDropped = false;
+  try {
+    creative = await buildCreative(params.instagram_actor_id);
+  } catch (err) {
+    if (params.instagram_actor_id && isInstagramPermissionError(err)) {
+      creative = await buildCreative(undefined);
+      instagramDropped = true;
+    } else {
+      throw err;
+    }
   }
 
   const creativeId = (creative as any)?.id;
@@ -659,6 +680,7 @@ export async function addAdToAdSet(client: Client, params: AddAdToAdSetParams) {
     adset_id: params.adset_id,
     creative_id: creativeId,
     ad_id: adId,
+    instagram_dropped: instagramDropped,
   };
 }