fix(file-summary): 修复删除对话时受保护批次阻塞

tests/test_file_summary_views.py

@@ -10,6 +10,7 @@ from review_agent.models import (
     FileAttachment,
     FileSummaryBatch,
     Message,
+    RegulatoryReviewBatch,
     WorkflowNodeRun,
 )
 
@@ -269,6 +270,39 @@ def test_conversation_delete_api_removes_owned_conversation(client, django_user_
     assert Conversation.objects.filter(pk=other_conversation.pk).exists()
 
 
+def test_conversation_delete_api_removes_protected_workflow_dependents(client, django_user_model):
+    user = django_user_model.objects.create_user(username="owner", password="pass")
+    conversation = Conversation.objects.create(user=user, title="待删除")
+    summary_batch = FileSummaryBatch.objects.create(
+        conversation=conversation,
+        user=user,
+        batch_no="FS-DELETE-PROTECTED",
+    )
+    regulatory_batch = RegulatoryReviewBatch.objects.create(
+        conversation=conversation,
+        user=user,
+        source_summary_batch=summary_batch,
+        batch_no="RR-DELETE-PROTECTED",
+    )
+    form_batch = ApplicationFormFillBatch.objects.create(
+        conversation=conversation,
+        user=user,
+        source_summary_batch=summary_batch,
+        source_regulatory_batch=regulatory_batch,
+        batch_no="AFF-DELETE-PROTECTED",
+    )
+    client.force_login(user)
+
+    response = client.delete(reverse("review_agent_conversation_detail", args=[conversation.pk]))
+
+    assert response.status_code == 200
+    assert response.json()["ok"] is True
+    assert not Conversation.objects.filter(pk=conversation.pk).exists()
+    assert not FileSummaryBatch.objects.filter(pk=summary_batch.pk).exists()
+    assert not RegulatoryReviewBatch.objects.filter(pk=regulatory_batch.pk).exists()
+    assert not ApplicationFormFillBatch.objects.filter(pk=form_batch.pk).exists()
+
+
 def test_conversation_delete_api_rejects_unowned_conversation(client, django_user_model):
     user = django_user_model.objects.create_user(username="owner", password="pass")
     other = django_user_model.objects.create_user(username="other", password="pass")