feat: Add support for sending CSAT surveys via templates (Whatsapp Cloud) (#12787)

This PR enables sending CSAT surveys on WhatsApp using approved WhatsApp
message templates, ensuring survey delivery even after the 24-hour
session window.

The system now automatically creates, updates, and monitors WhatsApp
CSAT templates without manual intervention.

<img width="1664" height="1792" alt="approved"
src="https://github.com/user-attachments/assets/c6efd61e-1d01-4738-abb6-0afc0dace975"
/>

#### Why this change

Previously, WhatsApp CSAT messages failed outside the 24-hour customer
window.

With this update:

- CSAT surveys are delivered reliably using WhatsApp templates
- Template creation happens automatically in the background
- Users can modify survey content and recreate templates easily
- Clear UI states show template approval status

#### Screens & States

<details>
<summary>Default — No template configured yet</summary>
<img width="1662" height="1788" alt="default"
src="https://github.com/user-attachments/assets/ed26d71b-cf7c-4a26-a2af-da88772c847c"
/>
</details>
<details>
<summary>Pending — Template submitted, awaiting Meta approval</summary>
<img width="1658" height="1816" alt="pending"
src="https://github.com/user-attachments/assets/923b789b-d91b-4364-905d-e56a2b65331a"
/>
</details>
<details>
<summary>Approved — Survey will be sent when conversation
resolves</summary>
<img width="1664" height="1792" alt="approved"
src="https://github.com/user-attachments/assets/c6efd61e-1d01-4738-abb6-0afc0dace975"
/>
</details>
<details>
<summary>Rejected — Template rejected by Meta</summary>
<img width="1672" height="1776" alt="rejected"
src="https://github.com/user-attachments/assets/f69a9b0e-be27-4e67-a993-7b8149502c4f"
/>
</details>
<details>
<summary>Not Found — Template missing in Meta Platform</summary>
<img width="1660" height="1784" alt="not-exist"
src="https://github.com/user-attachments/assets/a2a4b4f7-b01a-4424-8fcb-3ed84256e057"
/>
</details>
<details>
<summary>Edit Template — Delete & recreate template on change</summary>
<img width="2342" height="1778" alt="edit-survey"
src="https://github.com/user-attachments/assets/0f999285-0341-4226-84e9-31f0c6446924"
/>
</details>

#### Test Cases


**1. First-time CSAT setup on WhatsApp inbox**

- Enable CSAT
- Enter message + button text
- Save
- Expected: Template created automatically, UI shows pending state

**2. CSAT toggle without changing text**

- Existing approved template
- Toggle CSAT OFF → ON (no text change)
- Expected: No confirmation alert, no template recreation

**3. Editing only survey rules**

- Modify labels or rule conditions only
- Expected: No confirmation alert, template remains unchanged

**4. Template text change**

- Change survey message or button text
- Save
- Expected:
    - Confirmation dialog shown
    - On confirm → previous template deleted, new one created
    - On cancel → revert to previous values

**5. Language change**

- Change template language (e.g., en → es)
- Expected: Confirmation dialog + new template on confirm

 **6. Sending survey**

- Template approved → always send template
- Template pending → send free-form within 24 hours only
- Template rejected/missing → fallback to free-form (if within window)
- Outside 24 hours & no approved template → activity log only

**7. Non-WhatsApp inbox**

- Enable CSAT for email/web inbox
- Expected: No template logic triggered


Fixes
https://linear.app/chatwoot/issue/CW-6188/support-for-sending-csat-surveys-via-approved-whatsapp

---------

Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: Vinay Keerthi <11478411+stonecharioteer@users.noreply.github.com>
Co-authored-by: iamsivin <iamsivin@gmail.com>

app/javascript/dashboard/i18n/locale/en/inboxMgmt.json

@@ -808,6 +808,35 @@
         "LABEL": "Message",
         "PLACEHOLDER": "Please enter a message to show users with the form"
       },
+      "BUTTON_TEXT": {
+        "LABEL": "Button text",
+        "PLACEHOLDER": "Please rate us"
+      },
+      "LANGUAGE": {
+        "LABEL": "Language",
+        "PLACEHOLDER": "Select template language"
+      },
+      "MESSAGE_PREVIEW": {
+        "LABEL": "Message preview",
+        "TOOLTIP": "This may vary slightly when rendered on WhatsApp's platform."
+      },
+      "TEMPLATE_STATUS": {
+        "APPROVED": "Approved by WhatsApp",
+        "PENDING": "Pending WhatsApp approval",
+        "REJECTED": "Meta rejected the template",
+        "DEFAULT": "Needs WhatsApp approval",
+        "NOT_FOUND": "The template does not exist in the Meta platform."
+      },
+      "TEMPLATE_CREATION": {
+        "SUCCESS_MESSAGE": "WhatsApp template created successfully and sent for approval",
+        "ERROR_MESSAGE": "Failed to create WhatsApp template"
+      },
+      "TEMPLATE_UPDATE_DIALOG": {
+        "TITLE": "Edit survey details",
+        "DESCRIPTION": "We will delete the previous template and make a new one which will be sent again for WhatsApp approval",
+        "CONFIRM": "Create new template",
+        "CANCEL": "Go back"
+      },
       "SURVEY_RULE": {
         "LABEL": "Survey rule",
         "DESCRIPTION_PREFIX": "Send the survey if the conversation",
@@ -819,6 +848,7 @@
         "SELECT_PLACEHOLDER": "select labels"
       },
       "NOTE": "Note: CSAT surveys are sent only once per conversation",
+      "WHATSAPP_NOTE": "Note: We will create a template and send it for WhatsApp approval. After being approved, surveys will be sent only once per conversation as per the survey rule.",
       "API": {
         "SUCCESS_MESSAGE": "CSAT settings updated successfully",
         "ERROR_MESSAGE": "We couldn't update CSAT settings. Please try again later."