Feature: consumption templates (#4196)

* Initial implementation of consumption templates

* Frontend implementation of consumption templates

Testing

* Support consumption template source

* order templates, automatically add permissions

* Support title assignment in consumption templates

* Refactoring, filters to and, show sources on list

Show sources on template list, update some translation strings

Make filters and

minor testing

* Update strings

* Only update django-multiselectfield

* Basic docs, document some methods

* Improve testing coverage, template multi-assignment merges

src/paperless_mail/tests/test_mail.py

@@ -392,6 +392,11 @@ class TestMail(
             assign_title_from=MailRule.TitleSource.FROM_SUBJECT,
         )
         self.assertEqual(handler._get_title(message, att, rule), "the message title")
+        rule = MailRule(
+            name="b",
+            assign_title_from=MailRule.TitleSource.NONE,
+        )
+        self.assertEqual(handler._get_title(message, att, rule), None)
 
     def test_handle_message(self):
         message = self.create_message(