[FIX] sms_marketing: ensure SMS links use the correct domain

Before this commit, the generated SMS link did not include the
SMS code because it was created using the domain of the second
website instead of the intended one. This happened because the
comparison was made against the `web.base.url` parameter instead
of the current website domain.

With this fix, the system correctly uses the current website domain
for both link generation and comparison, ensuring the correct domain
is applied.

Steps to reproduce:
- Go to **SMS Marketing**.
- Create a new `mailing.mailing` with **Concat Recipients**.
- Set up **two websites** with different domains.
- Configure `web.base.url` using the same domain as the **first website**.
- Log in to the **second website**.
- Send the `mailing.mailing`.

Expected behavior:
- The SMS link should include the correct domain and the SMS code.

odoo#201641

Author: imanie383

addons/mass_mailing_sms/models/sms_sms.py

@@ -16,14 +16,15 @@ def _update_body_short_links(self):
         """ Override to tweak shortened URLs by adding statistics ids, allowing to
         find customer back once clicked. """
         res = dict.fromkeys(self.ids, False)
+        base_url = self.env['website'].get_current_website().get_base_url()
         for sms in self:
             if not sms.mailing_id or not sms.body:
                 res[sms.id] = sms.body
                 continue
 
             body = sms.body
             for url in set(re.findall(tools.TEXT_URL_REGEX, body)):
-                if url.startswith(sms.get_base_url() + '/r/'):
+                if url.startswith(sms.get_base_url() + '/r/') or url.startswith(base_url + '/r/'):
                     body = re.sub(re.escape(url) + r'(?![\w@:%.+&~#=/-])', url + f'/s/{sms.id}', body)
             res[sms.id] = body
         return res