fix(previs): 预演台关闭确认 - 显式关闭留台弹窗避免浏览器验收超时

web/src/components/canvas/previs/canvas-previs-workbench.tsx

@@ -539,8 +539,9 @@ export function CanvasPrevisWorkbench({
                 mask: { closable: false },
                 keyboard: false,
                 onOk: () => onClose(),
-                onCancel: () => {
+                onCancel: (close) => {
                     closingRef.current = false;
+                    close();
                 },
             });
         })();