feat(cloud): Add support for viewing status of SSL in custom domains (#12011)

# Pull Request Template

## Description

Fixes
[CW-4620](https://linear.app/chatwoot/issue/CW-4620/rethinking-custom-domains-in-chatwoot)

<img width="642" height="187" alt="Screenshot 2025-07-29 at 8 17 44 PM"
src="https://github.com/user-attachments/assets/ad2f5dac-4b27-4dce-93ca-6cbba74443fb"
/>


## Type of change

- [x] New feature (non-breaking change which adds functionality)

## How Has This Been Tested?



## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

---------

Co-authored-by: Vishnu Narayanan <iamwishnu@gmail.com>
Co-authored-by: Pranav <pranavrajs@gmail.com>
Co-authored-by: Pranav <pranav@chatwoot.com>

app/javascript/dashboard/api/helpCenter/portals.js

@@ -21,6 +21,14 @@ class PortalsAPI extends ApiClient {
   deleteLogo(portalSlug) {
     return axios.delete(`${this.url}/${portalSlug}/logo`);
   }
+
+  sendCnameInstructions(portalSlug, email) {
+    return axios.post(`${this.url}/${portalSlug}/send_instructions`, { email });
+  }
+
+  sslStatus(portalSlug) {
+    return axios.get(`${this.url}/${portalSlug}/ssl_status`);
+  }
 }
 
 export default PortalsAPI;