[Update] 修改一些文案和翻译

apps/assets/backends/db.py

@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 #
+from django.utils.translation import ugettext as _
 from functools import reduce
 from django.db.models import F, CharField, Value, IntegerField, Q, Count
 from django.db.models.functions import Concat
@@ -240,7 +241,7 @@ class AdminUserBackend(DBBackend):
         )
 
     def _perform_delete_by_union_id(self, union_id_cleaned):
-        raise PermissionError("Could remove asset admin user")
+        raise PermissionError(_("Could not remove asset admin user"))
 
     def all(self):
         qs = self.model.objects.all().annotate(
@@ -301,7 +302,7 @@ class AuthbookBackend(DBBackend):
         authbook_id, asset_id = union_id_cleaned
         authbook = get_object_or_none(AuthBook, pk=authbook_id)
         if authbook.is_latest:
-            raise PermissionError("Latest version could be delete")
+            raise PermissionError(_("Latest version could not be delete"))
         AuthBook.objects.filter(id=authbook_id).delete()
 
     def all(self):