Toast system_alert ganha botão de ação com deeplink

Novo <Toast group="system-alerts"> no AppLayout com template custom
(vive no bloco global — persiste em qualquer layout/rota). Renderiza:
- Ícone de alerta + título em bold
- Detail em texto menor com opacity
- Botão com deeplink quando payload.deeplink existe, severity danger

Label do botão inferido do deeplink:
- /configuracoes/creditos-whatsapp → "Ir pra loja"
- /configuracoes/whatsapp-pessoal  → "Ver conexão"
- /configuracoes/whatsapp-oficial  → "Ver canal oficial"
- outros → "Abrir" (ou payload.actionLabel se vier explícito)

Clique navega via router.push se é path interno, senão
window.location.href. Toast continua sticky (24h) + closable.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/layout/AppLayout.vue

@@ -17,7 +17,18 @@
 <script setup>
 import { useLayout } from '@/layout/composables/layout';
 import { computed, onMounted, onBeforeUnmount, provide, watch } from 'vue';
-import { useRoute } from 'vue-router';
+import { useRoute, useRouter } from 'vue-router';
+
+const router = useRouter();
+
+function goToDeeplink(link) {
+    if (!link) return;
+    if (typeof link === 'string' && link.startsWith('/')) {
+        router.push(link);
+    } else {
+        window.location.href = link;
+    }
+}
 
 import AppFooter from './AppFooter.vue';
 import AppSidebar from './AppSidebar.vue';
@@ -175,6 +186,32 @@ onBeforeUnmount(() => {
     <GlobalNoticeBanner />
     <ConversationDrawer />
     <GlobalInboundNotifier />
+
+    <!-- Toast especial pra alertas de sistema (heartbeat, saldo baixo, etc) —
+         vermelho sticky com botão de ação opcional via payload.deeplink -->
+    <Toast group="system-alerts" position="top-right" :pt="{ root: { style: 'width: 28rem; max-width: 92vw' } }">
+        <template #message="slotProps">
+            <div class="flex flex-col gap-2 w-full">
+                <div class="flex items-start gap-2">
+                    <i class="pi pi-exclamation-circle text-lg mt-0.5" style="color: var(--p-red-500)" />
+                    <div class="flex-1 min-w-0">
+                        <div class="font-bold text-sm">{{ slotProps.message.summary }}</div>
+                        <div class="text-xs mt-0.5 leading-relaxed opacity-85">{{ slotProps.message.detail }}</div>
+                    </div>
+                </div>
+                <Button
+                    v-if="slotProps.message.data?.deeplink"
+                    :label="slotProps.message.data?.actionLabel || 'Abrir'"
+                    icon="pi pi-arrow-right"
+                    iconPos="right"
+                    size="small"
+                    severity="danger"
+                    class="rounded-full self-end"
+                    @click="goToDeeplink(slotProps.message.data.deeplink)"
+                />
+            </div>
+        </template>
+    </Toast>
 </template>
 
 <style>