changes

fusion_faxes/models/res_config_settings.py

@@ -15,6 +15,15 @@ class ResConfigSettings(models.TransientModel):
         string='Enable RingCentral Faxing',
         config_parameter='fusion_faxes.ringcentral_enabled',
     )
+    ff_show_send_fax_button = fields.Boolean(
+        string='Show "Send Fax" Button on Sale Orders & Invoices',
+        config_parameter='fusion_faxes.show_send_fax_button',
+        default=True,
+        help='When enabled, the "Send Fax" header button appears on '
+             'sale order and invoice forms (for users in the Fax User '
+             'group). Turn off to hide the button without removing '
+             'fax-user access.',
+    )
     ff_ringcentral_server_url = fields.Char(
         string='RingCentral Server URL',
         config_parameter='fusion_faxes.ringcentral_server_url',
@@ -103,7 +112,15 @@ class ResConfigSettings(models.TransientModel):
             }
 
     def set_values(self):
-        """Protect credential fields from being blanked accidentally."""
+        """Protect credential fields from being blanked accidentally
+        and force-persist the Send Fax Boolean.
+
+        Odoo's stock ``set_param`` removes the row when a Boolean
+        config_parameter is False, which makes the ``get_param``
+        fallback default kick in — toggling OFF then would silently
+        re-show the button. We bypass that by writing 'True' / 'False'
+        as a string after super() runs so the row always exists.
+        """
         protected_keys = [
             'fusion_faxes.ringcentral_client_id',
             'fusion_faxes.ringcentral_client_secret',
@@ -122,4 +139,9 @@ class ResConfigSettings(models.TransientModel):
                 existing = ICP.get_param(key, '')
                 if existing:
                     ICP.set_param(key, existing)
-        return super().set_values()
+        res = super().set_values()
+        ICP.set_param(
+            'fusion_faxes.show_send_fax_button',
+            'True' if self.ff_show_send_fax_button else 'False',
+        )
+        return res