feat(api): 支持取消本地排队任务

apps/api/internal/store/tasks_runtime.go

@@ -256,6 +256,38 @@ WHERE id = $1::uuid`,
 	})
 }
 
+func (s *Store) CancelQueuedTask(ctx context.Context, taskID string, message string) (GatewayTask, bool, error) {
+	message = strings.TrimSpace(message)
+	if message == "" {
+		message = "任务已取消"
+	}
+	tag, err := s.pool.Exec(ctx, `
+UPDATE gateway_tasks
+SET status = 'cancelled',
+    error = NULLIF($2::text, ''),
+    error_code = 'task_cancelled',
+    error_message = NULLIF($2::text, ''),
+    locked_by = NULL,
+    locked_at = NULL,
+    heartbeat_at = NULL,
+    finished_at = now(),
+    updated_at = now()
+WHERE id = $1::uuid
+  AND status = 'queued'
+  AND COALESCE(remote_task_id, '') = ''`, taskID, message)
+	if err != nil {
+		return GatewayTask{}, false, err
+	}
+	if tag.RowsAffected() == 0 {
+		return GatewayTask{}, false, nil
+	}
+	task, err := s.GetTask(ctx, taskID)
+	if err != nil {
+		return GatewayTask{}, true, err
+	}
+	return task, true, nil
+}
+
 func (s *Store) ListRecoverableAsyncTasks(ctx context.Context, limit int) ([]AsyncTaskQueueItem, error) {
 	if limit <= 0 {
 		limit = 500