Function onPointerLeave

web/components/GraphView.tsx:734–741

()

    };

    const onPointerLeave = () => {
      if (!draggingRef.current && hoverIdRef.current) {
        hoverIdRef.current = null;
        draw();
      }
      // 离开画布：清 hover，但保留选中的持久高亮 + 其信息卡
      cardFor(selectedIdRef.current);
    };

    canvas.addEventListener("pointermove", onPointerMove);
    canvas.addEventListener("pointerdown", onPointerDown);