开启缩略轴，数据标签被裁切

### 问题描述

开启缩略轴后，数据分布差异较大的情况，标签会被裁切

### 重现链接

_No response_

### 重现步骤

_No response_

### 预期行为

_No response_

### 平台

- 操作系统: [macOS, Windows, Linux, React Native ...]
- 网页浏览器: [Google Chrome, Safari, Firefox]

### 屏幕截图或视频（可选）

### 补充说明（可选）

_No response_

Start by locating the thumbnail-axis and data-label rendering paths in G2, then reproduce the clipping shown in the attached screenshot with data whose distribution differs substantially. Confirm the affected chart configuration and define done as labels remaining fully visible when the thumbnail axis is enabled.

Written by the indexing model from the issue text.