FIX: IDs no formato @c.us para compatibilidade com o frontend

O frontend exige IDs no formato 5511999@c.us (verifica includes('@')
antes de carregar mensagens e usa split('@')[0] para exibir o nome).
Adicionados helpers cleanPhone/toWaId: DB continua com números limpos,
interface pública expõe @c.us. Corrige mensagens não carregando ao
abrir um chat e socket real-time mapeando o contato correto.

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

src/modules/whatsapp/whatsapp.service.ts

@@ -55,14 +55,23 @@ export class WhatsappService {
     return 'CONNECTED';
   }
 
+  private cleanPhone(id: string): string {
+    return id.replace(/@c\.us$/, '');
+  }
+
+  private toWaId(phone: string): string {
+    return phone.includes('@') ? phone : `${phone}@c.us`;
+  }
+
   async getChats() {
     const rows = await this.mensagensRepository.findChats();
     return Promise.all(rows.map(async (row: any) => {
       const chatId = row.chat_id;
+      const waId = this.toWaId(chatId);
       const assignment = await this.assignmentService.getAssignment(chatId);
       const contactProfile = await this.getCustomerContact(chatId);
       return {
-        id: { _serialized: chatId, user: chatId, server: 'c.us' },
+        id: { _serialized: waId, user: chatId, server: 'c.us' },
         name: contactProfile?.name || row.sender_name || chatId,
         preview: row.preview || '',
         timestamp: Number(row.timestamp),
@@ -75,7 +84,8 @@ export class WhatsappService {
   }
 
   async getChatMessages(chatId: string) {
-    const rows = await this.mensagensRepository.findByChatId(chatId);
+    const cleanId = this.cleanPhone(chatId);
+    const rows = await this.mensagensRepository.findByChatId(cleanId);
     return rows.map((row: any) => ({
       id: { _serialized: row.wamid, user: row.wamid, server: 'c.us' },
       body: row.body ?? '',
@@ -83,7 +93,7 @@ export class WhatsappService {
       timestamp: Number(row.timestamp),
       hasMedia: row.type !== 'text',
       media: null,
-      chatId: row.chat_id,
+      chatId: this.toWaId(row.chat_id),
       status: row.status,
     }));
   }
@@ -112,6 +122,7 @@ export class WhatsappService {
   }
 
   async sendMessage(to: string, message: string, _media?: { data: string; mimetype: string; filename?: string }, senderName?: string) {
+    const cleanTo = this.cleanPhone(to);
     const token = process.env.META_ACCESS_TOKEN;
     const phoneNumberId = process.env.META_PHONE_NUMBER_ID;
     const apiVersion = process.env.META_API_VERSION || 'v25.0';
@@ -133,7 +144,7 @@ export class WhatsappService {
         body: JSON.stringify({
           messaging_product: 'whatsapp',
           recipient_type: 'individual',
-          to,
+          to: cleanTo,
           type: 'text',
           text: { preview_url: false, body },
         }),
@@ -142,18 +153,18 @@ export class WhatsappService {
 
     if (!response.ok) {
       const error = await response.json().catch(() => ({}));
-      this.logger.error(`[Meta] Falha ao enviar mensagem para ${to}:`, error);
+      this.logger.error(`[Meta] Falha ao enviar mensagem para ${cleanTo}:`, error);
       throw new Error(`Meta API erro ${response.status}: ${JSON.stringify(error)}`);
     }
 
     const result = await response.json() as any;
     const wamid = result?.messages?.[0]?.id;
-    this.logger.log(`[Meta] Mensagem enviada para ${to}: ${wamid}`);
+    this.logger.log(`[Meta] Mensagem enviada para ${cleanTo}: ${wamid}`);
 
     if (wamid) {
       await this.mensagensRepository.save({
         wamid,
-        chatId: to,
+        chatId: cleanTo,
         fromMe: true,
         type: 'text',
         body: body,
@@ -163,7 +174,7 @@ export class WhatsappService {
       });
     }
 
-    await this.assignmentService.clearTransferNote(to);
+    await this.assignmentService.clearTransferNote(cleanTo);
     return result;
   }
 
@@ -257,7 +268,7 @@ export class WhatsappService {
     });
 
     this.gateway.emitNewMessage({
-      from,
+      from: this.toWaId(from),
       body: messageBody,
       timestamp,
       isGroupMsg: false,