feat: Add manual WhatsApp templates sync with UI (#12007)

Fixes https://github.com/chatwoot/chatwoot/issues/9600

**Summary**
- Added manual WhatsApp templates sync functionality accessible via UI
- Added refresh button in both inbox settings and template picker modal
- Enhanced template picker to always show for WhatsApp Cloud channels
(even when empty)


**Preview**

<img width="1456" height="798" alt="CleanShot 2025-07-22 at 14 15 28@2x"
src="https://github.com/user-attachments/assets/8a04ff26-61fa-42ee-a1b8-5e06433ae6e0"
/>


<img width="2376" height="1574" alt="CleanShot 2025-07-22 at 14 19
24@2x"
src="https://github.com/user-attachments/assets/1c772034-04ff-484d-88dd-ca8123e93065"
/>

---------

Co-authored-by: iamsivin <iamsivin@gmail.com>

app/javascript/dashboard/components/widgets/conversation/ReplyBox.vue

@@ -184,9 +184,8 @@ export default {
 
       return false;
     },
-    hasWhatsappTemplates() {
-      return !!this.$store.getters['inboxes/getWhatsAppTemplates'](this.inboxId)
-        .length;
+    showWhatsappTemplates() {
+      return this.isAWhatsAppCloudChannel && !this.isPrivate;
     },
     isPrivate() {
       if (this.currentChat.can_reply || this.isAWhatsAppChannel) {
@@ -1212,7 +1211,7 @@ export default {
     <ReplyBottomPanel
       :conversation-id="conversationId"
       :enable-multiple-file-upload="enableMultipleFileUpload"
-      :has-whatsapp-templates="hasWhatsappTemplates"
+      :enable-whats-app-templates="showWhatsappTemplates"
       :inbox="inbox"
       :is-on-private-note="isOnPrivateNote"
       :is-recording-audio="isRecordingAudio"