fix: finalize WhatsApp calls when terminate webhook overtakes connect (#14836)

## Description

Some inbound WhatsApp calls stayed stuck in "ringing" forever. When a
caller hung up within ~1s of dialing, Meta delivered the terminate
webhook before the connect webhook. The terminate arrived with no call
record yet and was dropped, then connect created the call in ringing
with nothing left to close it. These calls now correctly land as missed
(no_answer), and an agent who taps Accept on a call that already ended
gets a clean "call ended" instead of a generic error.

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)

## How Has This Been Tested?

- local UI testing

## Checklist:

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/dashboard/composables/useCallSession.js

@@ -161,6 +161,7 @@ const buildCallActions = ({ callsStore, whatsappSession, t }) => {
       return { conferenceSid: joinResponse?.conference_sid };
     } catch (error) {
       useAlert(error?.response?.data?.error || t('CONTACT_PANEL.CALL_FAILED'));
+      // 409 = the call already ended before accept landed (e.g. caller hung up mid-ring).
       if (error?.response?.status === 409) {
         TwilioVoiceClient.endClientCall();
         markDismissed(callSid);

app/javascript/dashboard/helper/voice.js

@@ -1,4 +1,7 @@
-import { CONTENT_TYPES } from 'dashboard/components-next/message/constants';
+import {
+  CONTENT_TYPES,
+  VOICE_CALL_STATUS,
+} from 'dashboard/components-next/message/constants';
 import { MESSAGE_TYPE } from 'shared/constants/messages';
 import { useCallsStore } from 'dashboard/stores/calls';
 import types from 'dashboard/store/mutation-types';
@@ -101,6 +104,7 @@ export function handleVoiceCallCreated(
     callSid,
     callId,
     provider,
+    status,
     callDirection,
     conversationId,
     inboxId,
@@ -108,6 +112,11 @@ export function handleVoiceCallCreated(
     senderId,
   } = extractCallData(message);
 
+  // A voice_call message can be created already terminal when the caller hangs
+  // up before connect. Only ring while the call is actually ringing; mirrors the
+  // guard in seedCallsFromHydratedMessages.
+  if (status !== VOICE_CALL_STATUS.RINGING) return;
+
   if (
     !shouldShowCall({
       callDirection,