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/widgets/conversation/ReplyBox.vue

@@ -27,6 +27,7 @@ import {
   replaceVariablesInMessage,
 } from '@chatwoot/utils';
 import WhatsappTemplates from './WhatsappTemplates/Modal.vue';
+import ContentTemplates from './ContentTemplates/ContentTemplatesModal.vue';
 import { MESSAGE_MAX_LENGTH } from 'shared/helpers/MessageTypeHelper';
 import inboxMixin, { INBOX_FEATURES } from 'shared/mixins/inboxMixin';
 import { trimContent, debounce, getRecipients } from '@chatwoot/utils';
@@ -61,6 +62,7 @@ export default {
     ReplyToMessage,
     ReplyTopPanel,
     ResizableTextArea,
+    ContentTemplates,
     WhatsappTemplates,
     WootMessageEditor,
   },
@@ -109,6 +111,7 @@ export default {
       toEmails: '',
       doAutoSaveDraft: () => {},
       showWhatsAppTemplatesModal: false,
+      showContentTemplatesModal: false,
       updateEditorSelectionWith: '',
       undefinedVariableMessage: '',
       showMentions: false,
@@ -187,6 +190,9 @@ export default {
     showWhatsappTemplates() {
       return this.isAWhatsAppCloudChannel && !this.isPrivate;
     },
+    showContentTemplates() {
+      return this.isATwilioWhatsAppChannel && !this.isPrivate;
+    },
     isPrivate() {
       if (this.currentChat.can_reply || this.isAWhatsAppChannel) {
         return this.isOnPrivateNote;
@@ -659,6 +665,12 @@ export default {
     hideWhatsappTemplatesModal() {
       this.showWhatsAppTemplatesModal = false;
     },
+    openContentTemplateModal() {
+      this.showContentTemplatesModal = true;
+    },
+    hideContentTemplatesModal() {
+      this.showContentTemplatesModal = false;
+    },
     onClickSelfAssign() {
       const {
         account_id,
@@ -774,6 +786,13 @@ export default {
       });
       this.hideWhatsappTemplatesModal();
     },
+    async onSendContentTemplateReply(messagePayload) {
+      this.sendMessage({
+        conversationId: this.currentChat.id,
+        ...messagePayload,
+      });
+      this.hideContentTemplatesModal();
+    },
     replaceText(message) {
       if (this.sendWithSignature && !this.private) {
         // if signature is enabled, append it to the message
@@ -1217,6 +1236,7 @@ export default {
       :conversation-id="conversationId"
       :enable-multiple-file-upload="enableMultipleFileUpload"
       :enable-whats-app-templates="showWhatsappTemplates"
+      :enable-content-templates="showContentTemplates"
       :inbox="inbox"
       :is-on-private-note="isOnPrivateNote"
       :is-recording-audio="isRecordingAudio"
@@ -1239,6 +1259,7 @@ export default {
       :portal-slug="connectedPortalSlug"
       :new-conversation-modal-active="newConversationModalActive"
       @select-whatsapp-template="openWhatsappTemplateModal"
+      @select-content-template="openContentTemplateModal"
       @toggle-editor="toggleRichContentEditor"
       @replace-text="replaceText"
       @toggle-insert-article="toggleInsertArticle"
@@ -1251,6 +1272,14 @@ export default {
       @cancel="hideWhatsappTemplatesModal"
     />
 
+    <ContentTemplates
+      :inbox-id="inbox.id"
+      :show="showContentTemplatesModal"
+      @close="hideContentTemplatesModal"
+      @on-send="onSendContentTemplateReply"
+      @cancel="hideContentTemplatesModal"
+    />
+
     <woot-confirm-modal
       ref="confirmDialog"
       :title="$t('CONVERSATION.REPLYBOX.UNDEFINED_VARIABLES.TITLE')"