style: 统一处理历史状态展示口径

apps/audit/models.py

@@ -99,3 +99,11 @@ class NotificationRecord(models.Model):
 
     def __str__(self) -> str:
         return f"{self.notify_reason}:{self.batch_id}"
+
+    def get_message_status_display_text(self) -> str:
+        """返回通知状态的中文展示文案。"""
+        return {
+            self.STATUS_PENDING: "处理中",
+            self.STATUS_SENT: "已发送",
+            self.STATUS_FAILED: "失败",
+        }.get(self.message_status, self.message_status)