feat(inbox): Add beta badge for TikTok and Voice channels (#14378)

TikTok and Voice channels in the inbox creation flow now display a small
"Beta" badge next to their title, signaling that these integrations are
still being polished while keeping them available for users to try.
Fixes
https://linear.app/chatwoot/issue/CW-7026/add-beta-label-for-tiktok-and-voice-inboxes

---------

Co-authored-by: Muhsin <12408980+muhsin-k@users.noreply.github.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/javascript/dashboard/components/widgets/ChannelItem.vue

@@ -77,6 +77,10 @@ const isComingSoon = computed(() => {
   return ['voice'].includes(key) && !isActive.value;
 });
 
+const isBeta = computed(() => {
+  return ['tiktok', 'voice'].includes(props.channel.key);
+});
+
 const onItemClick = () => {
   if (isActive.value) {
     emit('channelItemClick', props.channel.key);
@@ -90,6 +94,7 @@ const onItemClick = () => {
     :description="channel.description"
     :icon="channel.icon"
     :is-coming-soon="isComingSoon"
+    :is-beta="isBeta"
     :disabled="!isActive"
     @click="onItemClick"
   />