refactor: 下沉会话执行编排到 chat 服务层

tests/test_chat.py

@@ -8,7 +8,7 @@ from agent_core.results import AgentResult
 from apps.audit.models import AgentAuditLog
 from apps.audit.models import NotificationRecord
 from apps.chat.models import Conversation
-from apps.chat.services import create_conversation_for_batch
+from apps.chat.services import create_conversation_for_batch, execute_conversation_agent
 from apps.documents.models import ExportedDocument, SubmissionBatch, UploadedDocument
 
 
@@ -48,7 +48,7 @@ def test_chat_post_returns_agent_result_and_audit_log(client, db, monkeypatch):
     )
 
     monkeypatch.setattr(
-        "apps.chat.views.run_agent",
+        "apps.chat.services.run_agent",
         lambda *args, **kwargs: AgentResult(answer="模拟回答", status="success"),
     )
 
@@ -99,7 +99,7 @@ def test_chat_passes_selected_document_ids_to_agent_core(client, db, monkeypatch
         captured["options"] = options or {}
         return AgentResult(answer="ok", status="success")
 
-    monkeypatch.setattr("apps.chat.views.run_agent", fake_run_agent)
+    monkeypatch.setattr("apps.chat.services.run_agent", fake_run_agent)
 
     response = client.post(
         reverse("chat:detail", args=[conversation.conversation_id]),
@@ -169,7 +169,7 @@ def test_chat_execution_creates_notification_record_from_agent_result(client, db
     )
 
     monkeypatch.setattr(
-        "apps.chat.views.run_agent",
+        "apps.chat.services.run_agent",
         lambda *args, **kwargs: AgentResult(
             answer="执行完成",
             status="success",
@@ -212,7 +212,7 @@ def test_chat_execution_uses_notification_payload_message_status_and_receipt(cli
     )
 
     monkeypatch.setattr(
-        "apps.chat.views.run_agent",
+        "apps.chat.services.run_agent",
         lambda *args, **kwargs: AgentResult(
             answer="通知已发送",
             status="success",
@@ -257,7 +257,7 @@ def test_chat_execution_creates_failed_notification_record_and_updates_conversat
     )
 
     monkeypatch.setattr(
-        "apps.chat.views.run_agent",
+        "apps.chat.services.run_agent",
         lambda *args, **kwargs: AgentResult(
             answer="执行失败",
             status="failed",
@@ -310,7 +310,7 @@ def test_chat_execution_persists_agent_node_results_to_conversation(client, db,
     )
 
     monkeypatch.setattr(
-        "apps.chat.views.run_agent",
+        "apps.chat.services.run_agent",
         lambda *args, **kwargs: AgentResult(
             answer="已生成风险结论",
             status="success",
@@ -366,6 +366,52 @@ def test_create_conversation_for_batch_initializes_eight_workflow_nodes(db):
     ]
 
 
+def test_execute_conversation_agent_runs_in_service_layer_and_persists_audit_and_notifications(db, monkeypatch):
+    batch, conversation = _create_conversation_with_batch()
+    captured = {}
+
+    def fake_run_agent(scenario_config, user_input, options=None):
+        captured["scenario_id"] = scenario_config["id"]
+        captured["user_input"] = user_input
+        captured["options"] = options or {}
+        return AgentResult(
+            answer="服务层执行完成",
+            status="success",
+            notification_payload={
+                "batch_id": batch.batch_id,
+                "conversation_id": conversation.conversation_id,
+                "product_name": batch.product_name,
+                "notify_reason": "task_completed",
+                "owners": [
+                    {
+                        "owner_role": "注册资料负责人",
+                        "feishu_user_id": "ou_service_1",
+                    }
+                ],
+            },
+        )
+
+    monkeypatch.setattr("apps.chat.services.run_agent", fake_run_agent)
+
+    result, audit_log = execute_conversation_agent(
+        conversation=conversation,
+        message="服务层执行审核",
+        document_ids=[101, 102],
+        detail_url_builder=lambda log_id: f"/audit/{log_id}/",
+    )
+
+    conversation.refresh_from_db()
+    assert result.answer == "服务层执行完成"
+    assert audit_log.batch_id == batch.batch_id
+    assert captured["scenario_id"] == "document_review"
+    assert captured["user_input"] == "服务层执行审核"
+    assert captured["options"]["document_ids"] == [101, 102]
+    assert conversation.latest_summary["answer"] == "服务层执行完成"
+    record = NotificationRecord.objects.get()
+    assert record.notify_reason == "task_completed"
+    assert record.web_detail_url == f"/audit/{audit_log.id}/"
+
+
 def test_chat_page_shows_upload_entry_and_dynamic_context_cards(client, db):
     batch, conversation = _create_conversation_with_batch()
     conversation.node_results = [