feat: Add twilio content templates (#12277)

Implements comprehensive Twilio WhatsApp content template support (Phase
1) enabling text, media, and quick reply templates with proper parameter
conversion, sync capabilities, and feature flag protection.

###  Features Implemented

  **Template Types Supported**

  - Basic Text Templates: Simple text with variables ({{1}}, {{2}})
  - Media Templates: Image/Video/Document templates with text variables
  - Quick Reply Templates: Interactive button templates
- Phase 2 (Future): List Picker, Call-to-Action, Catalog, Carousel,
Authentication templates

  **Template Synchronization**

- API Endpoint: POST
/api/v1/accounts/{account_id}/inboxes/{inbox_id}/sync_templates
  - Background Job: Channels::Twilio::TemplatesSyncJob
  - Storage: JSONB format in channel_twilio_sms.content_templates
  - Auto-categorization: UTILITY, MARKETING, AUTHENTICATION categories

 ###  Template Examples Tested


  #### Text template
```
  { "name": "greet", "language": "en" }
```
  #### Template with variables
```
  { "name": "order_status", "parameters": [{"type": "body", "parameters": [{"text": "John"}]}] }
```

  #### Media template with image
```
  { "name": "product_showcase", "parameters": [
    {"type": "header", "parameters": [{"image": {"link": "image.jpg"}}]},
    {"type": "body", "parameters": [{"text": "iPhone"}, {"text": "$999"}]}
  ]}
```
#### Preview

<img width="1362" height="1058" alt="CleanShot 2025-08-26 at 10 01
51@2x"
src="https://github.com/user-attachments/assets/cb280cea-08c3-44ca-8025-58a96cb3a451"
/>

<img width="1308" height="1246" alt="CleanShot 2025-08-26 at 10 02
02@2x"
src="https://github.com/user-attachments/assets/9ea8537a-61e9-40f5-844f-eaad337e1ddd"
/>

#### User guide

https://www.chatwoot.com/hc/user-guide/articles/1756195741-twilio-content-templates

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

app/javascript/dashboard/components-next/NewConversation/components/ActionButtons.vue

@@ -11,12 +11,14 @@ import { extractTextFromMarkdown } from 'dashboard/helper/editorHelper';
 
 import Button from 'dashboard/components-next/button/Button.vue';
 import WhatsAppOptions from './WhatsAppOptions.vue';
+import ContentTemplateSelector from './ContentTemplateSelector.vue';
 
 const props = defineProps({
   attachedFiles: { type: Array, default: () => [] },
   isWhatsappInbox: { type: Boolean, default: false },
   isEmailOrWebWidgetInbox: { type: Boolean, default: false },
   isTwilioSmsInbox: { type: Boolean, default: false },
+  isTwilioWhatsAppInbox: { type: Boolean, default: false },
   messageTemplates: { type: Array, default: () => [] },
   channelType: { type: String, default: '' },
   isLoading: { type: Boolean, default: false },
@@ -32,6 +34,7 @@ const emit = defineEmits([
   'discard',
   'sendMessage',
   'sendWhatsappMessage',
+  'sendTwilioMessage',
   'insertEmoji',
   'addSignature',
   'removeSignature',
@@ -63,6 +66,20 @@ const sendWithSignature = computed(() => {
   return fetchSignatureFlagFromUISettings(props.channelType);
 });
 
+const showTwilioContentTemplates = computed(() => {
+  return props.isTwilioWhatsAppInbox && props.inboxId;
+});
+
+const shouldShowEmojiButton = computed(() => {
+  return (
+    !props.isWhatsappInbox && !props.isTwilioWhatsAppInbox && !props.hasNoInbox
+  );
+});
+
+const isRegularMessageMode = computed(() => {
+  return !props.isWhatsappInbox && !props.isTwilioWhatsAppInbox;
+});
+
 const setSignature = () => {
   if (signatureToApply.value) {
     if (sendWithSignature.value) {
@@ -125,7 +142,7 @@ const keyboardEvents = {
     action: () => {
       if (
         isEditorHotKeyEnabled('enter') &&
-        !props.isWhatsappInbox &&
+        isRegularMessageMode.value &&
         !props.isDropdownActive
       ) {
         emit('sendMessage');
@@ -136,7 +153,7 @@ const keyboardEvents = {
     action: () => {
       if (
         isEditorHotKeyEnabled('cmd_enter') &&
-        !props.isWhatsappInbox &&
+        isRegularMessageMode.value &&
         !props.isDropdownActive
       ) {
         emit('sendMessage');
@@ -158,8 +175,13 @@ useKeyboardEvents(keyboardEvents);
         :message-templates="messageTemplates"
         @send-message="emit('sendWhatsappMessage', $event)"
       />
+      <ContentTemplateSelector
+        v-if="showTwilioContentTemplates"
+        :inbox-id="inboxId"
+        @send-message="emit('sendTwilioMessage', $event)"
+      />
       <div
-        v-if="!isWhatsappInbox && !hasNoInbox"
+        v-if="shouldShowEmojiButton"
         v-on-click-outside="() => (isEmojiPickerOpen = false)"
         class="relative"
       >
@@ -172,7 +194,7 @@ useKeyboardEvents(keyboardEvents);
         />
         <EmojiInput
           v-if="isEmojiPickerOpen"
-          class="ltr:left-0 rtl:right-0 top-full mt-1.5"
+          class="top-full mt-1.5 ltr:left-0 rtl:right-0"
           :on-click="onClickInsertEmoji"
         />
       </div>
@@ -199,7 +221,7 @@ useKeyboardEvents(keyboardEvents);
         />
       </FileUpload>
       <Button
-        v-if="hasSelectedInbox && !isWhatsappInbox"
+        v-if="hasSelectedInbox && isRegularMessageMode"
         icon="i-lucide-signature"
         color="slate"
         size="sm"
@@ -218,7 +240,7 @@ useKeyboardEvents(keyboardEvents);
         @click="emit('discard')"
       />
       <Button
-        v-if="!isWhatsappInbox"
+        v-if="isRegularMessageMode"
         :label="sendButtonLabel"
         size="sm"
         class="!text-xs font-medium"