feat(voice): WhatsApp Cloud Calling — UI [6] (#14346)

## Summary

Frontend for WhatsApp Cloud Calling: header / contact-panel call
buttons, ringing widget, accept/reject/hangup, mute, in-bubble audio
player + transcript, recording-on-hangup upload, mid-call reload
warning. WebRTC is browser-direct to Meta — no media server bridge.

## Closes
- https://linear.app/chatwoot/issue/PLA-150

## How to test

Requires backend support — the controller, services, model changes, and
routes ship in **#14334** (`feature/pla-150`). Merge / deploy that first
(or simultaneously); the FE alone won't function without those
endpoints.

Then on staging, for a WhatsApp Cloud + embedded-signup inbox with the
new \`Configuration → Enable voice calling\` toggle ON and webhook
registered:

1. **Outbound** — open a conversation, click the phone icon in the
conversation header (or contact panel), grant mic, your phone rings,
answer, audio both ways, hang up. Recording + transcript land in the
bubble within ~10s.
2. **Inbound** — call the business number from your phone. The
FloatingCallWidget appears bottom-right with caller name. Click accept,
audio both ways, hang up. Recording + transcript appear.
3. **Mute** — during an active WhatsApp call, click the mic icon next to
hangup. Speech stops reaching Meta until you click again.
4. **Mid-call reload guard** — try `Cmd-R` during an active call;
browser shows a confirm prompt.

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: iamsivin <iamsivin@gmail.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

app/javascript/dashboard/components-next/icon/ChannelIcon.vue

@@ -1,5 +1,6 @@
 <script setup>
-import { toRef } from 'vue';
+import { computed, toRef } from 'vue';
+import { isVoiceCallEnabled } from 'dashboard/helper/inbox';
 import { useChannelIcon } from './provider';
 import Icon from 'next/icon/Icon.vue';
 
@@ -10,9 +11,20 @@ const props = defineProps({
   },
 });
 
+defineOptions({ inheritAttrs: false });
+
 const channelIcon = useChannelIcon(toRef(props, 'inbox'));
+const hasVoiceBadge = computed(() => isVoiceCallEnabled(props.inbox));
 </script>
 
 <template>
-  <Icon :icon="channelIcon" />
+  <span class="relative inline-flex" v-bind="$attrs">
+    <Icon :icon="channelIcon" class="size-full" />
+    <span
+      v-if="hasVoiceBadge"
+      class="absolute top-0 ltr:right-0 rtl:left-0 inline-flex items-center justify-center size-2 rounded-full bg-n-surface-1"
+    >
+      <Icon icon="i-lucide-audio-lines" class="size-1.5 text-n-slate-12" />
+    </span>
+  </span>
 </template>

app/javascript/dashboard/components-next/icon/provider.js

@@ -1,5 +1,5 @@
+import { INBOX_TYPES, TWILIO_CHANNEL_MEDIUM } from 'dashboard/helper/inbox';
 import { computed } from 'vue';
-import { isVoiceCallEnabled } from 'dashboard/helper/inbox';
 
 export function useChannelIcon(inbox) {
   const channelTypeIconMap = {
@@ -27,19 +27,29 @@ export function useChannelIcon(inbox) {
     const type = inboxDetails.channel_type;
     let icon = channelTypeIconMap[type];
 
-    if (type === 'Channel::Email' && inboxDetails.provider) {
+    if (type === INBOX_TYPES.EMAIL && inboxDetails.provider) {
       if (Object.keys(providerIconMap).includes(inboxDetails.provider)) {
         icon = providerIconMap[inboxDetails.provider];
       }
     }
 
     // Special case for Twilio whatsapp
-    if (type === 'Channel::TwilioSms' && inboxDetails.medium === 'whatsapp') {
+    if (
+      type === INBOX_TYPES.TWILIO &&
+      inboxDetails.medium === TWILIO_CHANNEL_MEDIUM.WHATSAPP
+    ) {
       icon = 'i-woot-whatsapp';
     }
 
-    // Special case for voice-enabled inboxes (Twilio, WhatsApp, etc.)
-    if (isVoiceCallEnabled(inboxDetails)) {
+    // Native Twilio voice inbox: a TwilioSms with voice enabled (and no WhatsApp medium)
+    // is presented as a Voice channel, so show the phone icon.
+    const voiceEnabled =
+      inboxDetails.voice_enabled || inboxDetails.voiceEnabled;
+    if (
+      type === INBOX_TYPES.TWILIO &&
+      voiceEnabled &&
+      inboxDetails.medium !== TWILIO_CHANNEL_MEDIUM.WHATSAPP
+    ) {
       icon = 'i-woot-voice';
     }