[Bug]: 在comboCombined布局中同时使用zoom-canvas和fix-element-size时，放大的节点会超出combo范围

### Describe the bug / 问题描述

import { Graph } from '@antv/g6';

fetch('https://assets.antv.antgroup.com/g6/combo.json')
.then((res) => res.json())
.then((data) => {
const graph = new Graph({
container: 'container',
data,
layout: {
type: 'combo-combined',
comboPadding: 2,
},
node: {
style: {
size: 20,
labelText: (d) => d.id,
},
palette: {
type: 'group',
field: (d) => d.combo,
},
},
edge: {
style: (model) => {
const { size, color } = model.data;
return {
stroke: color || '#99ADD1',
lineWidth: size || 1,
};
},
},
behaviors: ['drag-element', 'drag-canvas', 'zoom-canvas',
{type: 'fix-element-size', enable: true}],
autoFit: 'view',
});

graph.render();
});

### Reproduction link / 复现链接

_No response_

### Steps to Reproduce the Bug or Issue / 重现步骤

_No response_

### Version / 版本

🆕 5.x

### OS / 操作系统

- [ ] macOS
- [x] Windows
- [ ] Linux
- [ ] Others / 其他

### Browser / 浏览器

- [ ] Chrome
- [x] Edge
- [x] Firefox
- [ ] Safari (Limited support / 有限支持)
- [ ] IE (Nonsupport / 不支持)
- [ ] Others / 其他

Reproduce the supplied Graph configuration with combo-combined, zoom-canvas, and fix-element-size using the linked combo.json asset. Start by tracing how zooming and fixed element sizing interact with combo bounds; done means enlarged nodes remain within their combo after zooming across the listed browsers.

Written by the indexing model from the issue text.