feat: 支持 agent 运行取消功能

backend/src/v1/agent/service.py

@@ -30,6 +30,7 @@ from schemas.domain.chat_message import (
 from v1.agent.schemas import (
     AgentRepositoryLike,
     AttachmentStorageLike,
+    CancelRequested,
     EventStreamLike,
     HistorySnapshotResponse,
     QueueClientLike,
@@ -157,6 +158,26 @@ class AgentService:
             created=created,
         )
 
+    async def cancel_run(
+        self,
+        *,
+        thread_id: str,
+        run_id: str,
+        current_user: CurrentUser,
+    ) -> CancelRequested:
+        owner = await self._repository.get_session_owner(session_id=thread_id)
+        ensure_session_owner(owner_id=owner, current_user=current_user)
+        await self._queue.request_cancel(
+            thread_id=thread_id,
+            run_id=run_id,
+            requested_by=str(current_user.id),
+        )
+        return CancelRequested(
+            thread_id=thread_id,
+            run_id=run_id,
+            accepted=True,
+        )
+
     async def _append_context_cache_user_message(
         self,
         *,