[Feat]: 优化坐标轴轴线在存在正负数据时的表现

### Describe the feature / 功能描述

这种情况下 axis.x.line 应该画在 y 轴刻度 = 0 的位置

### Are you willing to contribute? / 是否愿意参与贡献？

✅ Yes / 是

Start by reproducing the attached case in G2 with data containing both positive and negative values, then inspect how the x-axis line is positioned relative to the y-axis ticks. Done means axis.x.line is drawn at the y-axis tick value 0 when both signs are present.

Written by the indexing model from the issue text.