feat: add daily report functionality and settlement status to shop orders

backend/order/signals.py

@@ -1,4 +1,4 @@
-from .models import ShopOrderModel, ShopOrderItem
+from .models import ShopOrderModel, ShopOrderItem, ShopDailyReport
 from django.db import transaction
 from django.db.models.signals import post_save
 from django.db.models.signals import pre_save
@@ -248,4 +248,11 @@ def send_invoice_to_shop_telegram(sender, instance: ShopOrderModel, created, **k
             shop_order_id=instance.pk,
             chat_id=instance.shop.telegram_chat_id,
             bot_token=bot_token
-        )
+        )
+
+
+@receiver(post_save, sender=ShopDailyReport)
+def update_shop_orders_settlement_status(sender, instance: ShopDailyReport, **kwargs):
+    """When a ShopDailyReport's is_settled status changes, update all related ShopOrderModel instances."""
+    # Update all shop orders linked to this daily report
+    instance.shop_orders.update(is_settled=instance.is_settled)