feat:物料新增set_safe接口设置安全库存上下限

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/mtm/views.py

@@ -79,7 +79,20 @@ class MaterialViewSet(CustomModelViewSet):
             'week_esitimate_consume', None)
         obj.save()
         return Response()
-    
+
+    @action(methods=['put'], detail=True, serializer_class=Serializer, perms_map={'put': '*'})
+    @transaction.atomic
+    def set_safe(self, request, *args, **kwargs):
+        """设置安全库存上下限
+
+        count_safe 为下限, count_safe_upper 为上限
+        """
+        obj: Material = self.get_object()
+        obj.count_safe = request.data.get('count_safe', None)
+        obj.count_safe_upper = request.data.get('count_safe_upper', None)
+        obj.save(update_fields=['count_safe', 'count_safe_upper', 'update_time'])
+        return Response()
+
     @action(methods=['get'], detail=False, serializer_class=Serializer, perms_map={'get': '*'})
     def cates(self, request, *args, **kwargs):
         res = Material.objects.exclude(cate='').exclude(cate=None).values_list('cate', flat=True).distinct()