feat: Handle external echo messages from native apps (#13371)

When businesses use WhatsApp Business App (co-existence mode) or
Instagram App or TikTok alongside Chatwoot, messages sent from the
native apps were not synced properly back to Chatwoot. This left agents
with an incomplete conversation history and no visibility into responses
sent outside the dashboard. Additionally, if these echo messages did
arrive, they appeared as "Sent by: Bot" in the UI since they had no
sender, making it confusing for agents.

This PR subscribes to WhatsApp `smb_message_echoes` webhook events and
routes them through the existing service with an `outgoing_echo` flag,
mirroring how Instagram already handles echoes. On the Instagram side,
echo messages now also carry the `external_echo` content attribute and
`delivered` status.

On the frontend, messages with `externalEcho` are distinguished from bot
messages showing a "Native app" avatar and an advisory note encouraging
agents to reply from Chatwoot to maintain the service window.

<img width="1518" height="524" alt="CleanShot 2026-01-29 at 13 37 57@2x"
src="https://github.com/user-attachments/assets/5aa0b552-6382-441f-96aa-9a62ca716e4a"
/>


Fixes
https://linear.app/chatwoot/issue/CW-4204/display-messages-not-sent-from-chatwoot-in-case-of-outgoing-echo
Fixes
https://linear.app/chatwoot/issue/PLA-33/incoming-from-me-messages-from-whatsapp-business-app-are-not-falling

app/javascript/dashboard/components-next/message/Message.vue

@@ -3,12 +3,14 @@ import { onMounted, computed, ref, toRefs } from 'vue';
 import { useTimeoutFn } from '@vueuse/core';
 import { provideMessageContext } from './provider.js';
 import { useTrack } from 'dashboard/composables';
+import { useMapGetter } from 'dashboard/composables/store';
 import { emitter } from 'shared/helpers/mitt';
 import { useI18n } from 'vue-i18n';
 import { useRoute } from 'vue-router';
 import { LocalStorage } from 'shared/helpers/localStorage';
 import { ACCOUNT_EVENTS } from 'dashboard/helper/AnalyticsHelper/events';
 import { LOCAL_STORAGE_KEYS } from 'dashboard/constants/localStorage';
+import { getInboxIconByType } from 'dashboard/helper/inbox';
 import { BUS_EVENTS } from 'shared/constants/busEvents';
 import {
   MESSAGE_TYPES,
@@ -139,6 +141,8 @@ const showBackgroundHighlight = ref(false);
 const showContextMenu = ref(false);
 const { t } = useI18n();
 const route = useRoute();
+const inboxGetter = useMapGetter('inboxes/getInbox');
+const inbox = computed(() => inboxGetter.value(props.inboxId) || {});
 
 /**
  * Computes the message variant based on props
@@ -162,6 +166,10 @@ const variant = computed(() => {
   if (props.contentAttributes?.isUnsupported)
     return MESSAGE_VARIANTS.UNSUPPORTED;
 
+  if (props.contentAttributes?.externalEcho) {
+    return MESSAGE_VARIANTS.AGENT;
+  }
+
   const isBot = !props.sender || props.sender.type === SENDER_TYPES.AGENT_BOT;
   if (isBot && props.messageType === MESSAGE_TYPES.OUTGOING) {
     return MESSAGE_VARIANTS.BOT;
@@ -424,6 +432,18 @@ function handleReplyTo() {
 }
 
 const avatarInfo = computed(() => {
+  if (props.contentAttributes?.externalEcho) {
+    const { name, avatar_url, channel_type, medium } = inbox.value;
+    const iconName = avatar_url
+      ? null
+      : getInboxIconByType(channel_type, medium);
+    return {
+      name: iconName ? '' : name || t('CONVERSATION.NATIVE_APP'),
+      src: avatar_url || '',
+      iconName,
+    };
+  }
+
   // If no sender, return bot info
   if (!props.sender) {
     return {
@@ -451,6 +471,9 @@ const avatarInfo = computed(() => {
 });
 
 const avatarTooltip = computed(() => {
+  if (props.contentAttributes?.externalEcho) {
+    return t('CONVERSATION.NATIVE_APP_ADVISORY');
+  }
   if (avatarInfo.value.name === '') return '';
   return `${t('CONVERSATION.SENT_BY')} ${avatarInfo.value.name}`;
 });
@@ -484,7 +507,7 @@ provideMessageContext({
   <div
     v-if="shouldRenderMessage"
     :id="`message${props.id}`"
-    class="flex mb-2 w-full message-bubble-container"
+    class="flex w-full mb-2 message-bubble-container"
     :data-message-id="props.id"
     :class="[
       flexOrientationClass,

app/javascript/dashboard/i18n/locale/en/conversation.json

@@ -253,6 +253,8 @@
     "MESSAGE_ERROR": "Unable to send this message, please try again later",
     "SENT_BY": "Sent by:",
     "BOT": "Bot",
+    "NATIVE_APP": "Native app",
+    "NATIVE_APP_ADVISORY": "This message was sent from the native app. Reply from Chatwoot to maintain the message window.",
     "SEND_FAILED": "Couldn't send message! Try again",
     "TRY_AGAIN": "retry",
     "ASSIGNMENT": {