FIX: Status da conexão retorna CONNECTED para o frontend exibir os chats

O frontend bloqueia loadChats() quando whatsappStatus !== 'CONNECTED'.
Com a Meta API, getStatus() retornava 'META_API', zerando a lista de
conversas a cada refresh. Corrigido para retornar 'CONNECTED' e o gateway
agora emite o status ao conectar para atualizar o frontend via socket.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/modules/whatsapp/whatsapp.gateway.ts

@@ -44,6 +44,7 @@ export class WhatsappGateway implements OnGatewayInit, OnGatewayConnection, OnGa
   
   handleConnection(client: Socket) {
     this.logger.log(`Client connected: ${client.id} (${client.data.user?.username || 'usuario desconhecido'})`);
+    client.emit('status', 'CONNECTED');
   }
 
   handleDisconnect(client: Socket) {

src/modules/whatsapp/whatsapp.service.ts

@@ -52,7 +52,7 @@ export class WhatsappService {
   }
 
   getStatus() {
-    return 'META_API';
+    return 'CONNECTED';
   }
 
   async getChats() {