[FIX] mail_show_follower: Use company from the document to render mes…

…sages correctly

In a multi-company environment, if one company uses the show_followers_partner_format by partner_name and another company uses partner_email, a user with permissions in both companies may experience issues. If a document belongs to Company A, but the current company is set to Company B, the message format is taken from the current company (Company B) instead of the document’s company (Company A). This fix ensures that the message format is rendered based on the document's company.

mail_show_follower/models/mail_mail.py

@@ -104,8 +104,10 @@ def _send(self, auto_commit=False, raise_exception=False, smtp_session=None):
                         # get partners
                         cc_internal = True
                         # else get company in object
+                        company = self.env.company
                         if hasattr(obj, "company_id") and obj.company_id:
                             cc_internal = obj.company_id.show_internal_users_cc
+                            company = obj.company_id
                         # get company in user
                         elif mail.env and mail.env.user and mail.env.user.company_id:
                             cc_internal = (
@@ -139,14 +141,16 @@ def _send(self, auto_commit=False, raise_exception=False, smtp_session=None):
                                 mail.mapped("recipient_ids.lang")
                                 + [
                                     mail.author_id.lang,
-                                    self.env.company.partner_id.lang,
+                                    company.partner_id.lang,
                                 ],
                             )
                         )
                         # get show follower text
-                        final_cc = mail.with_context(
-                            lang=langs and langs[0]
-                        )._build_cc_text(partners)
+                        final_cc = (
+                            mail.with_context(lang=langs and langs[0])
+                            .with_company(company)
+                            ._build_cc_text(partners)
+                        )
                         # it is saved in the body_html field so that it does
                         # not appear in the odoo log
                         mail.body_html = final_cc + mail.body_html